The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform
Yuhong Zhao - One of the best experts on this subject based on the ideXlab platform.
-
effect of Austenitizing Temperature on the mechanical properties of high strength maraging steel
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2013Co-Authors: L Qi, Yuhong ZhaoAbstract:Abstract This paper investigates the effect of Austenitizing Temperature on mechanical properties of X00CrNiCoMo9-9-5-3 corrosion resistant maraging steel. The results show that solution treatment recrystallization Temperature of this experimental steel is 850 °C. After a solution treatment below 850 °C, the experimental steel will change to form austenite via the non-dispersive phase transition from α′ to γ, which inherits the forging structure high density defects. Then the experimental steel can cool to form high strength martensitic steel. Moreover, high hardness austenite increases the resistance to phase transition in the cooling process and increases the content of retained austenite, thus guaranteeing excellent low Temperature toughness of maraging steel.
Hoon Kwon - One of the best experts on this subject based on the ideXlab platform.
-
influences of co addition and Austenitizing Temperature on secondary hardening and impact fracture behavior in p m high speed steels of w mo cr v co system
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2008Co-Authors: H K Moon, Hoon KwonAbstract:Abstract The secondary hardening and fracture behavior in P/M high speed steels of W–Mo–Cr–V(–Co) system has been investigated in terms of Co addition and Austenitizing Temperature. Austenitizing was conducted at 1100 and 1175 °C of relatively low and high Temperatures, respectively. Tempering was performed in the range of 500–600 °C. Coarse primary carbides retained after heat treatment were V-rich MC and W–Mo-rich M6C types. Since the dissolution of W–Mo-rich M6C with relatively low stability was more promoted with increasing Austenitizing Temperature, the alloy content of the W and Mo in the matrix was enhanced. In turn, it gives a significant influence on the precipitation of fine secondary alloy carbides, that is, secondary hardening during tempering. The major secondary carbides were W–Mo–Cr-rich M2C type. The peak hardness was observed in the tempering range of 500–540 °C, depending on Co addition and Austenitizing Temperature. With an increase in Austenitizing Temperature, the aging deceleration was observed. This phenomenon may be attributed to the increased content of W and Mo in the matrix, both diffusing slowly in the matrix and inhibiting growth of M2C carbide, as compared to Cr. In addition, the aging acceleration occurred in the Co bearing alloy, promoting the precipitation of M2C carbides, as well as the overall increase in hardness. In general, the impact toughness was decreased with an increase in hardness. In addition, the impact toughness to hardness balance was lowered in the Co bearing alloy.
-
Influences of Co addition and Austenitizing Temperature on secondary hardening and impact fracture behavior in P/M high speed steels of W–Mo–Cr–V(–Co) system
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2008Co-Authors: H K Moon, Hoon KwonAbstract:Abstract The secondary hardening and fracture behavior in P/M high speed steels of W–Mo–Cr–V(–Co) system has been investigated in terms of Co addition and Austenitizing Temperature. Austenitizing was conducted at 1100 and 1175 °C of relatively low and high Temperatures, respectively. Tempering was performed in the range of 500–600 °C. Coarse primary carbides retained after heat treatment were V-rich MC and W–Mo-rich M6C types. Since the dissolution of W–Mo-rich M6C with relatively low stability was more promoted with increasing Austenitizing Temperature, the alloy content of the W and Mo in the matrix was enhanced. In turn, it gives a significant influence on the precipitation of fine secondary alloy carbides, that is, secondary hardening during tempering. The major secondary carbides were W–Mo–Cr-rich M2C type. The peak hardness was observed in the tempering range of 500–540 °C, depending on Co addition and Austenitizing Temperature. With an increase in Austenitizing Temperature, the aging deceleration was observed. This phenomenon may be attributed to the increased content of W and Mo in the matrix, both diffusing slowly in the matrix and inhibiting growth of M2C carbide, as compared to Cr. In addition, the aging acceleration occurred in the Co bearing alloy, promoting the precipitation of M2C carbides, as well as the overall increase in hardness. In general, the impact toughness was decreased with an increase in hardness. In addition, the impact toughness to hardness balance was lowered in the Co bearing alloy.
Chao Zhao - One of the best experts on this subject based on the ideXlab platform.
-
influence of Austenitizing Temperature on the microstructure and mechanical properties of an fe cr ni mo ti maraging stainless steel
Journal of Materials Engineering and Performance, 2019Co-Authors: Yong Lian, Jin Zhang, Jinfeng Huang, Zunjun Zhang, Chao ZhaoAbstract:The influence of Austenitizing Temperature on the microstructure and mechanical properties of an Fe-Cr-Ni-Mo-Ti maraging stainless steel was investigated. The grain size, Laves phase, and retained austenite in steels given different solution treatments were observed using optical microscopy, scanning electron microscopy, and x-ray diffraction. Relationships with mechanical properties were measured by tensile testing. The grain growth rate was relatively slow at Temperatures of 800-1000 °C then rapidly increased at higher Temperatures. Low-Temperature austenitization augmented the retention of austenite, the fraction of which decreased with an increase in Austenitizing Temperature. The Laves phases, which precipitated in austenite during austenitization at 800-900 °C, were preserved after quenching. The solution treatment had a significant effect on the final tensile properties of the steel after aging, due to the presence of retained austenite and Laves phase reducing its strength.
L Qi - One of the best experts on this subject based on the ideXlab platform.
-
effect of Austenitizing Temperature on the mechanical properties of high strength maraging steel
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2013Co-Authors: L Qi, Yuhong ZhaoAbstract:Abstract This paper investigates the effect of Austenitizing Temperature on mechanical properties of X00CrNiCoMo9-9-5-3 corrosion resistant maraging steel. The results show that solution treatment recrystallization Temperature of this experimental steel is 850 °C. After a solution treatment below 850 °C, the experimental steel will change to form austenite via the non-dispersive phase transition from α′ to γ, which inherits the forging structure high density defects. Then the experimental steel can cool to form high strength martensitic steel. Moreover, high hardness austenite increases the resistance to phase transition in the cooling process and increases the content of retained austenite, thus guaranteeing excellent low Temperature toughness of maraging steel.
A S Chaus - One of the best experts on this subject based on the ideXlab platform.
-
Structural and phase changes in carbides of the high-speed steel upon heat treatment
The Physics of Metals and Metallography, 2016Co-Authors: A S ChausAbstract:The effect of Austenitizing Temperature on structural and phase changes in carbides of the tungsten–molybdenum high-speed steel has been studied. The results of metallographic analysis and energy dispersive microanalysis have been discussed. It has been shown that an increase in Austenitizing Temperature from 1180 to 1260°C causes structural transformations in carbide particles of eutectic origin crushed upon hot plastic deformation, which are related to their dissolution and coalescence, and changes in the phase composition of the carbides themselves.
-
structural transformations during heat treatment of w mo cast high speed steel modified using titanium diboride
Physics of Metals and Metallography, 2011Co-Authors: A S Chaus, M Bogachik, P UradnikAbstract:The effect of the Austenitizing Temperature on the transformation of the primary structure of a tungsten-molybdenum high-speed steel of the R6M5 type modified by an addition of a titanium boride powder has been studied. The results of metallographic, X-ray diffraction, and electron-microprobe analysis of the steel have been discussed. It is shown that an increase in the Austenitizing Temperature from 1180 to 1260°C causes significant structural transformations both in the carbide constituent and in the steel matrix.
-
On the wear resistance of high-speed steels
Journal of Friction and Wear, 2008Co-Authors: A S ChausAbstract:The wear resistance of cast and strained high-speed steels are evaluated and compared, and the regularities of variations in their structure and properties depending on the Austenitizing Temperature are described. The impact of modification on the wear resistance of tungsten-molybdenum high-speed steels has been studied. Data on the steels with improved wear resistance are reported
