The Experts below are selected from a list of 2148 Experts worldwide ranked by ideXlab platform
Shinji Kumai - One of the best experts on this subject based on the ideXlab platform.
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Strip Casting of Recycled Aluminum Alloys by a Twin Roll Caster
Waste and Biomass Valorization, 2012Co-Authors: Toshio Haga, Shinji Kumai, Hisaki WatariAbstract:Purpose The purpose of the present study is to investigate the mechanical properties of roll cast recycled 6016 aluminum Alloy Strip using a vertical type high-speed twin roll caster. Method A vertical type twin roll caster with 1500 mm diameter rolls was designed and assembled to cast aluminum Alloy Strip at a high speed and high cooling rate. 6016 aluminum Alloy sheet is typically used for the bodies of automobiles. Virgin 6016 (0.16 %Fe) and Fe added 6016 (0.45 %Fe) (henceforth called recycled 6016) Alloys were cast at a speed of 60 m/min. The microstructure of the as-cast Strip was observed. The as-cast Strip could be cold rolled, without homogenization, down to 1 mm. Tension test and 180-degree bending test were conducted to investigate the properties of recycled 6016. Results The Strip could be cast at a speed of 60 m/min. The thickness of the as-cast Strip was 3.4 mm, and the microstructure was very fine. The as-cast Strip could be cold rolled, without homogenization, down to 1 mm. T4 heat-treated Strips of virgin 6016 (0.16 %Fe) and recycled 6016 (0.45 %Fe) Alloys could be bent at 180 degrees without breaking. The Fe content had no effect on the results of the tension test and 180-degree bending test. Conclusions The mechanical properties of recycled 6016 Strip were improved by rapid solidification of the twin roll caster. The twin roll caster decreased the effect of Fe.
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improvement of porosity of Strip using a scraper on the casting by a vertical type high speed roll caster
Advanced Materials Research, 2010Co-Authors: Ryoji Nakamura, Shinji Kumai, Yusuke Shiotsu, Kosuke Komeda, Hisaki WarariAbstract:Porosity occurred in the 5182 aluminum Alloy Strip cast by a vertical type high speed twin roll caster. The porosity was caused by high-roll-speed and low-roll-load. Improvement of the porosity was tried by a scraper. The scraper was mounted on the roll, and the scraper was moveable depend on the thickness of the solidified layer on the roll. The scraper scribed the semisolid layer to improve the porosity. The scraper was useful to decrease the porosity of roll cast 5182 aluminum Alloy Strip.
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Roll Casting of Al-SiCp Composite Strip
Advanced Materials Research, 2010Co-Authors: Ryoji Nakamura, Hideto Harada, Shinji Kumai, Teppei Nakamura, Hisaki WatariAbstract:Roll casting of Al-SiCp composite Alloy Strip was tried using a vertical type high speed twin roll caster equipped with mild steel rolls. The Al-20vol% SiCp and Al-30vol%SiCp Alloy could be roll-cast to the Strip. The casting speed was 30m/min. The thickness of as-cast Strip was thinner than 2.5mm. The SiCp powder was dispersed uniformly at the thickness direction. The as-cast Strip could be thin down to 1mm by the hot rolling and the cold rolling without broken.
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Casting of Aluminium Alloy Strip by Improved Single-Roll Caster
Proceedings of the 36th International MATADOR Conference, 2010Co-Authors: Kazuya Akitsu, Shinji Kumai, Toshio Haga, Hisaki WatariAbstract:A scriber was equipped to a single roll caster to improve the free solidified surface. The scriber contacted to the free solidified surface at the constant force. The some amount of semisolid layer at the surface was removed and the surface became flat. The scriber was made from the mild steel plate. The mild steel plate was covered by the insulator paper to prevent the cooling of the melt by the plate. The melt pool was made on the roll by the side dam plates, back dam plate and the scriber. Therefore, a tip or a nozzle was not needed. The AA5182 and AA6022 aluminum Alloy Strip were cast by single roll caster with scriber. The as-cast Strips could be cold rolling. The microstructure of as-cast Strip was not uniform at thickness direction. However, the microstructure became uniform after the cold rolling and the annealing.
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6111 aluminium Alloy Strip casting using an unequal diameter twin roll caster
Journal of Materials Processing Technology, 2006Co-Authors: Toshio Haga, Masaaki Ikawa, Hisaki Wtari, Shinji KumaiAbstract:Abstract An unequal diameter twin roll caster with a long solidification length was devised to cast aluminium Alloy Strip with a thickness of about 5 mm at speed higher than 20 m/min. The characteristics of the unequal diameter twin roll caster with a long solidification length are as follows. The diameter of the lower roll is four times larger than that of the upper roll. The solidification length is up to 300 mm. The casting speed is up to 60 m/min. Using the unequal diameter twin roll caster, a 4.5 mm thickness of 6111 Strip could be cast at a speed of 30 m/min. Low superheat casting and semisolid casting was adopted to the unequal diameter twin roll caster with a long solidification length. The macrostructure of the as-cast Strip was equiaxed and spherical, not columnar. The mechanical properties of the Strip rolled from roll-cast Strip were almost as same as that of the Strip made from cast ingot.
Toshio Haga - One of the best experts on this subject based on the ideXlab platform.
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Strip Casting of Recycled Aluminum Alloys by a Twin Roll Caster
Waste and Biomass Valorization, 2012Co-Authors: Toshio Haga, Shinji Kumai, Hisaki WatariAbstract:Purpose The purpose of the present study is to investigate the mechanical properties of roll cast recycled 6016 aluminum Alloy Strip using a vertical type high-speed twin roll caster. Method A vertical type twin roll caster with 1500 mm diameter rolls was designed and assembled to cast aluminum Alloy Strip at a high speed and high cooling rate. 6016 aluminum Alloy sheet is typically used for the bodies of automobiles. Virgin 6016 (0.16 %Fe) and Fe added 6016 (0.45 %Fe) (henceforth called recycled 6016) Alloys were cast at a speed of 60 m/min. The microstructure of the as-cast Strip was observed. The as-cast Strip could be cold rolled, without homogenization, down to 1 mm. Tension test and 180-degree bending test were conducted to investigate the properties of recycled 6016. Results The Strip could be cast at a speed of 60 m/min. The thickness of the as-cast Strip was 3.4 mm, and the microstructure was very fine. The as-cast Strip could be cold rolled, without homogenization, down to 1 mm. T4 heat-treated Strips of virgin 6016 (0.16 %Fe) and recycled 6016 (0.45 %Fe) Alloys could be bent at 180 degrees without breaking. The Fe content had no effect on the results of the tension test and 180-degree bending test. Conclusions The mechanical properties of recycled 6016 Strip were improved by rapid solidification of the twin roll caster. The twin roll caster decreased the effect of Fe.
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Casting of Aluminium Alloy Strip by Improved Single-Roll Caster
Proceedings of the 36th International MATADOR Conference, 2010Co-Authors: Kazuya Akitsu, Shinji Kumai, Toshio Haga, Hisaki WatariAbstract:A scriber was equipped to a single roll caster to improve the free solidified surface. The scriber contacted to the free solidified surface at the constant force. The some amount of semisolid layer at the surface was removed and the surface became flat. The scriber was made from the mild steel plate. The mild steel plate was covered by the insulator paper to prevent the cooling of the melt by the plate. The melt pool was made on the roll by the side dam plates, back dam plate and the scriber. Therefore, a tip or a nozzle was not needed. The AA5182 and AA6022 aluminum Alloy Strip were cast by single roll caster with scriber. The as-cast Strips could be cold rolling. The microstructure of as-cast Strip was not uniform at thickness direction. However, the microstructure became uniform after the cold rolling and the annealing.
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6111 aluminium Alloy Strip casting using an unequal diameter twin roll caster
Journal of Materials Processing Technology, 2006Co-Authors: Toshio Haga, Masaaki Ikawa, Hisaki Wtari, Shinji KumaiAbstract:Abstract An unequal diameter twin roll caster with a long solidification length was devised to cast aluminium Alloy Strip with a thickness of about 5 mm at speed higher than 20 m/min. The characteristics of the unequal diameter twin roll caster with a long solidification length are as follows. The diameter of the lower roll is four times larger than that of the upper roll. The solidification length is up to 300 mm. The casting speed is up to 60 m/min. Using the unequal diameter twin roll caster, a 4.5 mm thickness of 6111 Strip could be cast at a speed of 30 m/min. Low superheat casting and semisolid casting was adopted to the unequal diameter twin roll caster with a long solidification length. The macrostructure of the as-cast Strip was equiaxed and spherical, not columnar. The mechanical properties of the Strip rolled from roll-cast Strip were almost as same as that of the Strip made from cast ingot.
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Continuous Casting: Proceedings of the International Conference on Continuous Casting of Non-Ferrous Metals - 6111 Aluminium Alloy Strip casting using an unequal diameter twin roll caster
Journal of Materials Processing Technology, 2006Co-Authors: Toshio Haga, Masaaki Ikawa, Hisaki Wtari, Shinji KumaiAbstract:Abstract An unequal diameter twin roll caster with a long solidification length was devised to cast aluminium Alloy Strip with a thickness of about 5 mm at speed higher than 20 m/min. The characteristics of the unequal diameter twin roll caster with a long solidification length are as follows. The diameter of the lower roll is four times larger than that of the upper roll. The solidification length is up to 300 mm. The casting speed is up to 60 m/min. Using the unequal diameter twin roll caster, a 4.5 mm thickness of 6111 Strip could be cast at a speed of 30 m/min. Low superheat casting and semisolid casting was adopted to the unequal diameter twin roll caster with a long solidification length. The macrostructure of the as-cast Strip was equiaxed and spherical, not columnar. The mechanical properties of the Strip rolled from roll-cast Strip were almost as same as that of the Strip made from cast ingot.
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casting of aluminum Alloy Strip by an unequal diameter twin roll caster
The Proceedings of the Materials and processing conference, 2004Co-Authors: Toshio Haga, Hisaki Watari, Masaaki Ikawa, Hiroshi Sakaguchi, Hideki Inui, Shinji KumaiAbstract:Purpose: of this paper is to clear the property and ability of an unequal diameter twin roll caster to cast commercial size Strip. Therefore, 400mm-width Strip was cast as first step. Surface-condition, microstructure and mechanical property of the Strip was investigated. Design/methodology/approach: Method used in the present study was an unequal diameter twin roll caster. This method was devised to realize easy operation of the twin roll casting and increase of casting speed. Findings: are that 400-width-Strip of 3084, 5182 and 6022 could be cast at speed of 20 m/min. This Strip was about 4 mm-thick. There were some defects on the surface. As cast Strip could be cold-rolled down to sheet of 1 mm-thick. 180 degrees bending test was operated on the 6022 sheet after T4 heat treatment. Crack did not occurred at the outer surface when Strip was bent at width-direction. Research limitations/implications: is that the quantity of the melt was 21kg and investigation of the properties was not enough for practical use. The larger weight of melt must be cast for production. Practical implications: are as below. The 400mm-width Strip can be cast easily by the unequal diameter twin roll caster. This caster can be adapted to 3083, 5182 and 6022. Originality/value: as below. The economy sheet with 400mm width can be produced by the unequal diameter twin roll caster. 3083, 5182 and 6022 can be cast at the speed of 20m/min. The thickness of the Strip was about 4mm.
Guoyi Tang - One of the best experts on this subject based on the ideXlab platform.
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Mechanical properties and tensile fracture of Ti–Al–V Alloy Strip under electropulsing-induced phase change
Journal of Materials Research, 2014Co-Authors: Zion Tsz Ho Tse, Guoyi TangAbstract:The effect of high-energy electropulsing treatment (EPT) on the microstructure evolution, mechanical properties, and fracture behavior of as-treated Ti–6Al–4V Alloy Strips was investigated. EPT was found to accelerate phase transition and microstructure evolution of quasi-single-phase titanium Alloy Strips at a relatively low temperature, and obtain characteristic duplex microstructure and Widmanstatten microstructure. The EPT-induced microstructural changes increased elongation-to-failure remarkably with a slight decrease in tensile strength. Fracture surface observation and three-dimensional analysis showed that transition from small-shallow dimple colony to big-deep colony fracture took place with an increase in frequency of EPT. The rapid phase change of the Ti–6Al–4V Alloy Strip under EPT was attributed to the enhancement of nucleation rate and atomic diffusion resulting from the coupling of the thermal and athermal effects. It is supposed that EPT can provide a highly efficient method for the intermediate-softening annealing of titanium Alloy sheet/Strips.
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influence of electropulsing treatment on the recrystallization and texture of ni9w Alloy Strip
Journal of Materials Research, 2014Co-Authors: Jianan Liu, Guoyi Tang, Wei Liu, Rufei ZhuAbstract:The effects of electropulsing treatment (EPT) on the recrystallization and texture of Ni9W Alloy were investigated using micro-hardness and electron backscattered diffraction patterns. It is found that compared with conventional annealing, EPT tremendously accelerates the recrystallization process of Ni9W Alloy. Moreover, the full recrystallization temperature of EPT is decreased by ∼180 °C. The rapid recrystallization process is attributed to the substantial increase in the atomic flux resulting from the athermal effect. EPT also significantly reduces the intensity of cube texture after full recrystallization. The evolution of recrystallization microstructure and texture reveals that EPT greatly increases the proportion of noncube oriented nuclei but has little effect on the size advantage of cube grains. It is suggested that the change of recrystallization texture results from the different effects of EPT on cube band nucleation and shear band nucleation.
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Microstructure and Mechanical Properties of Cold-Rolled Mg-6Al-1Zn Alloy Strip Treated by Electropulsing Treatment
Materials Science Forum, 2014Co-Authors: Yan Bin Jiang, Lei Guan, Guoyi TangAbstract:The effect of electropulsing treatment (EPT) on the microstructure and mechanical properties of the cold-rolled Mg-6Al-1Zn Alloy Strip was investigated. It is found that EPT accelerated the recrystallization behaviour of the cold-rolled Mg-6Al-1Zn Alloy Strip at a relatively low temperature within a short time of 14 seconds. When the temperature of EPT was 423 K, recovery of Mg matrix happened and few β-Mg17Al12 phaseprecipitated in the Mg matrix. With increasing the temperature to 463 K, recrystallization occurred, accompanying dissolution of β-Mg17Al12 phase. When the temperature was increased to 483 K, complete recrystallization took place and obtained fine microstructure of quasi-single-phase recrystallized grains. The elongation to failurewas increased from the 6.3 % of the rolled Strip to 23.5 %, while the tensile strength was decreased from 368 MPa to 300 MPa. Further increasing the temperature of EPT, the apparent grain growth occurred and both the tensile strength and elongation to failure reduced. A mechanism for rapid recrystallization process during EPT was discussed.
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Improvement of formability of Mg–3Al–1Zn Alloy Strip by electroplastic-differential speed rolling
Materials Science and Engineering: A, 2014Co-Authors: Fei Wang, Guoyi Tang, Jing ZhuAbstract:Abstract The effect of electroplastic-differential speed rolling (EDSR) on manufacturing thin Mg–3Al–1Zn magnesium Alloy Strip has been investigated. The Strips were cold rolled at room temperature with 8% reduction per pass by symmetrical electroplastic rolling (ER) and EDSR. The ductility of rolled Strip is significantly enhanced by EDSR, with an acceptable decrease of tensile strength compared to the Strip by ER, which may be attributed to the fully dynamic recrystallization (DRX) and tilted basal poles in the EDSR sample.
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Electropulsing Induced Texture Evolution in the Recrystallization of Fe-3 Pct Si Alloy Strip
Metallurgical and Materials Transactions A, 2011Co-Authors: Guoyi Tang, Yaohua Zhu, Chan Hung ShekAbstract:Electropulsing induced texture evolution in the primary recrystallization of a Fe-3 pct Si Alloy Strip was studied using the electron backscattered diffraction technique. The results revealed that the electropulsing strengthened considerably the recrystallization of a cold-rolled Fe-3Si Alloy Strip. Various textures with high-energy storages, such as α (100)〈110〉, γ (111)〈110〉, γ (111)〈112〉, and G-texture (110)〈001〉, formed after several seconds of electropulsing treatment (EPT), depending on the intensity of electropulsing. The athermal effect of electropulsing is 319 times stronger than the thermal effect of electropulsing for the formation of the G texture. The mechanism of electopulsing induced texture evolution is discussed from the point of view of Gibbs free energy and dislocation dynamics.
Chan Hung Shek - One of the best experts on this subject based on the ideXlab platform.
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Electropulsing Induced Texture Evolution in the Recrystallization of Fe-3 Pct Si Alloy Strip
Metallurgical and Materials Transactions A, 2011Co-Authors: Guoyi Tang, Yaohua Zhu, Chan Hung ShekAbstract:Electropulsing induced texture evolution in the primary recrystallization of a Fe-3 pct Si Alloy Strip was studied using the electron backscattered diffraction technique. The results revealed that the electropulsing strengthened considerably the recrystallization of a cold-rolled Fe-3Si Alloy Strip. Various textures with high-energy storages, such as α (100)〈110〉, γ (111)〈110〉, γ (111)〈112〉, and G-texture (110)〈001〉, formed after several seconds of electropulsing treatment (EPT), depending on the intensity of electropulsing. The athermal effect of electropulsing is 319 times stronger than the thermal effect of electropulsing for the formation of the G texture. The mechanism of electopulsing induced texture evolution is discussed from the point of view of Gibbs free energy and dislocation dynamics.
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Influence of electropulsing treatment on microstructure and mechanical properties of cold-rolled Mg–9Al–1Zn Alloy Strip
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2011Co-Authors: Yanbin Jiang, Chan Hung Shek, Guoyi Tang, Lei Guan, Zhihao ZhangAbstract:Abstract Influences of electropulsing treatment (EPT) on microstructure and mechanical properties of cold-rolled Mg–9Al–1Zn Alloy Strip were studied. EPT was found to accelerate the recrystallization of cold-rolled Mg–9Al–1Zn Alloy Strip at a relatively low temperature, and obtain fine microstructure of quasi-single-phase-recrystallized grains. The EPT-induced microstructural changes weakened the intensity of the basal fiber texture, and increased elongation to failure remarkably with a decrease in tensile strength. Fracture surface analysis showed that transition from intergranular brittle facture to transgranular dimple fracture took place with an increase in frequency of EPT. The rapid recrystallization behaviour of the Mg–9Al–1Zn Alloy Strip under EPT was attributed to the enhancement of nucleation rate and atomic diffusion resulting from the coupling of the thermal and athermal effects. It is supposed that EPT can provide a highly efficient method for the intermediate-softening annealing of magnesium Alloys sheet/Strips.
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microstructure and texture evolution of the cold rolled az91 magnesium Alloy Strip under electropulsing treatment
Journal of Alloys and Compounds, 2011Co-Authors: Yanbin Jiang, Guoyi Tang, Chan Hung ShekAbstract:Abstract The effect of electropulsing treatment (EPT) on the microstructure and texture evolution of the cold-rolled AZ91 magnesium Alloy Strip was investigated using X-ray diffraction (XRD) and electron backscattered diffraction patterns (EBSD). The results indicated that EPT accelerated tremendously the recrystallization behaviour of the cold-rolled AZ91 magnesium Alloy Strip at a relatively low temperature within a short time of 7 s. It also suppressed precipitation of β-Mg 17 Al 12 phase, compared with conventional heat treatment. The recrystallized grains favourably weakened the intensity of the basal texture. A mechanism for rapid recrystallization process during EPT was proposed based on the enhancement of nucleation rate and atomic diffusion resulting from the coupling of the themal and athermal effects.
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Electropulsing-induced G-texture evolution in a deformed Fe-3%Si Alloy Strip
Journal of Materials Research, 2011Co-Authors: Yaohua Zhu, Chan Hung Shek, Guoyi TangAbstract:Electropulsing-induced evolution of texture during recrystallization of Fe–3%Si Alloy Strip was studied using electron backscattered diffraction and x-ray diffraction techniques. Under electropulsing, various textures occurred during several seconds of recrystallization in the Alloy. The Goss texture (G-texture) with high energy storage developed with increasing misorientation distribution of the low-angle grain boundaries. The mechanism of the electropulsing-induced G-texture evolution was discussed from the point of view of electropulsing dynamics.
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Effect of Electropulsing on Recrystallization of Fe-3%Si Alloy Strip
Materials Transactions, 2010Co-Authors: Guoliang Hu, Chan Hung Shek, Guoyi Tang, Y.h Zhu, Xu QingAbstract:Recrystallization and microstructural changes of an electropulsing treated (EPT) Fe-3%Si Alloy Strip were studied using optical microscopy and electron backscattering diffraction (EBSD) techniques. Microstructural evolution and misorientation angle distribution were detected during recrystallization in both EPT and traditional heat treated (THT) Alloy specimens. The results indicate electropulsing tremendously accelerated movement of dislocation and vacancies, which is in favors of recrystallization. The temperature of recrystallization was reduced. A sufficient high temperature became a dominant factor in speeding up recrystallization. The mechanism of electropulsing induced recrystallization is discussed from the point view of dislocation dynamics, microstructural changes and electropulsing kinetics. (doi:10.2320/matertrans.M2010044) Grain-oriented Fe-3% Si steels are used as cores in electrical transformers due to their soft magnetic properties. In order to develop a new production technology for grain- oriented silicon steel heat treatment, EPT is use to cold rolling Fe-3% Si Strip. As an alternative to the traditional thermal and mechanical processes, EPT has been recognized for its high efficiency and attracted attention for use in extensive studies in materials science and engineering, such as electroplasticity, 1-4) electromigation, 5) recrystallization, 6) phase transformation 7-11) and mechanism of interaction between electrons and lattice atoms and dislocation move- ment. 12,13) In our previous studies indicated that EPT enhanced rates of recrysytallization of AZ31 Alloy. 14) Compared with the conventional processes, microstructure and grain size were remarkably different, and the material properties were improved. But so far little has been done on the effects of electropulsing on the microstructural evolution of the Fe-Si Alloy. The material selected in the research was a commercial Fe-Si Alloy with a composition of Al(0.024 mass%), N(0.026 mass%), Cu(0.10), Si(3 mass%), Fe in balance. The as-received Fe-Si Alloy Strip of 6 mm in width and 0.3 mm in thickness was produced after 75% final reduction of cold rolling at room temperature. The schematic view of EPT process is shown in Fig. 1. Multiple pulses current generated continuously are applied to the Alloy Strip directly when the Fe-Si Alloy Strip was moving at a speed of 1 m/min through a distance of 200 mm between the two electrodes. An electropulsing generator was applied to discharge positive- directional multiple pulses with various pulse voltage through adjusting controlling parameters. It took about 12 s to move the Strip from anode to cathode. An infrared thermoscope was adopted near the cathodes to test the surface maximum temperature of material directly. The current parameters such as amplitude and root-mean-square density
Masaaki Ikawa - One of the best experts on this subject based on the ideXlab platform.
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6111 aluminium Alloy Strip casting using an unequal diameter twin roll caster
Journal of Materials Processing Technology, 2006Co-Authors: Toshio Haga, Masaaki Ikawa, Hisaki Wtari, Shinji KumaiAbstract:Abstract An unequal diameter twin roll caster with a long solidification length was devised to cast aluminium Alloy Strip with a thickness of about 5 mm at speed higher than 20 m/min. The characteristics of the unequal diameter twin roll caster with a long solidification length are as follows. The diameter of the lower roll is four times larger than that of the upper roll. The solidification length is up to 300 mm. The casting speed is up to 60 m/min. Using the unequal diameter twin roll caster, a 4.5 mm thickness of 6111 Strip could be cast at a speed of 30 m/min. Low superheat casting and semisolid casting was adopted to the unequal diameter twin roll caster with a long solidification length. The macrostructure of the as-cast Strip was equiaxed and spherical, not columnar. The mechanical properties of the Strip rolled from roll-cast Strip were almost as same as that of the Strip made from cast ingot.
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Continuous Casting: Proceedings of the International Conference on Continuous Casting of Non-Ferrous Metals - 6111 Aluminium Alloy Strip casting using an unequal diameter twin roll caster
Journal of Materials Processing Technology, 2006Co-Authors: Toshio Haga, Masaaki Ikawa, Hisaki Wtari, Shinji KumaiAbstract:Abstract An unequal diameter twin roll caster with a long solidification length was devised to cast aluminium Alloy Strip with a thickness of about 5 mm at speed higher than 20 m/min. The characteristics of the unequal diameter twin roll caster with a long solidification length are as follows. The diameter of the lower roll is four times larger than that of the upper roll. The solidification length is up to 300 mm. The casting speed is up to 60 m/min. Using the unequal diameter twin roll caster, a 4.5 mm thickness of 6111 Strip could be cast at a speed of 30 m/min. Low superheat casting and semisolid casting was adopted to the unequal diameter twin roll caster with a long solidification length. The macrostructure of the as-cast Strip was equiaxed and spherical, not columnar. The mechanical properties of the Strip rolled from roll-cast Strip were almost as same as that of the Strip made from cast ingot.
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casting of aluminum Alloy Strip by an unequal diameter twin roll caster
The Proceedings of the Materials and processing conference, 2004Co-Authors: Toshio Haga, Hisaki Watari, Masaaki Ikawa, Hiroshi Sakaguchi, Hideki Inui, Shinji KumaiAbstract:Purpose: of this paper is to clear the property and ability of an unequal diameter twin roll caster to cast commercial size Strip. Therefore, 400mm-width Strip was cast as first step. Surface-condition, microstructure and mechanical property of the Strip was investigated. Design/methodology/approach: Method used in the present study was an unequal diameter twin roll caster. This method was devised to realize easy operation of the twin roll casting and increase of casting speed. Findings: are that 400-width-Strip of 3084, 5182 and 6022 could be cast at speed of 20 m/min. This Strip was about 4 mm-thick. There were some defects on the surface. As cast Strip could be cold-rolled down to sheet of 1 mm-thick. 180 degrees bending test was operated on the 6022 sheet after T4 heat treatment. Crack did not occurred at the outer surface when Strip was bent at width-direction. Research limitations/implications: is that the quantity of the melt was 21kg and investigation of the properties was not enough for practical use. The larger weight of melt must be cast for production. Practical implications: are as below. The 400mm-width Strip can be cast easily by the unequal diameter twin roll caster. This caster can be adapted to 3083, 5182 and 6022. Originality/value: as below. The economy sheet with 400mm width can be produced by the unequal diameter twin roll caster. 3083, 5182 and 6022 can be cast at the speed of 20m/min. The thickness of the Strip was about 4mm.