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Guangjie Huang - One of the best experts on this subject based on the ideXlab platform.

  • RESEARCH ARTICLE Heat Transfer Modeling of an Annular On- Line Spray Water Cooling Process for Electric- Resistance-Welded Steel
    2016
    Co-Authors: Zejun Chen, Huiquan Han, Wei Ren, Guangjie Huang
    Abstract:

    On-line Spray Water cooling (OSWC) of electric-resistance-welded (ERW) steel pipes can replace the conventional off-line heat treatment process and become an important and criti-cal procedure. The OSWC process improves production efficiency, decreases costs, and enhances the mechanical properties of ERW steel pipe, especially the impact properties of the weld joint. In this paper, an annular OSWC process is investigated based on an experi-mental simulation platform that can obtain precise real-time measurements of the tempera-ture of the pipe, the Water pressure and flux, etc. The effects of the modes of annular Spray Water cooling and related cooling parameters on the mechanical properties of the pipe are investigated. The temperature evolutions of the inner and outer walls of the pipe are mea-sured during the Spray Water cooling process, and the uniformity of mechanical properties along the circumferential and longitudinal directions is investigated. A heat transfer coeffi-cient model of Spray Water cooling is developed based on measured temperature data in conjunction with simulation using the finite element method. Industrial tests prove the valid-ity of the heat transfer model of a steel pipe undergoing Spray Water cooling. The research results can provide a basis for the industrial application of the OSWC process in the produc-tion of ERW steel pipes

  • heat transfer modeling of an annular on line Spray Water cooling process for electric resistance welded steel pipe
    PLOS ONE, 2015
    Co-Authors: Zeju Che, Guangjie Huang
    Abstract:

    On-line Spray Water cooling (OSWC) of electric-resistance-welded (ERW) steel pipes can replace the conventional off-line heat treatment process and become an important and critical procedure. The OSWC process improves production efficiency, decreases costs, and enhances the mechanical properties of ERW steel pipe, especially the impact properties of the weld joint. In this paper, an annular OSWC process is investigated based on an experimental simulation platform that can obtain precise real-time measurements of the temperature of the pipe, the Water pressure and flux, etc. The effects of the modes of annular Spray Water cooling and related cooling parameters on the mechanical properties of the pipe are investigated. The temperature evolutions of the inner and outer walls of the pipe are measured during the Spray Water cooling process, and the uniformity of mechanical properties along the circumferential and longitudinal directions is investigated. A heat transfer coefficient model of Spray Water cooling is developed based on measured temperature data in conjunction with simulation using the finite element method. Industrial tests prove the validity of the heat transfer model of a steel pipe undergoing Spray Water cooling. The research results can provide a basis for the industrial application of the OSWC process in the production of ERW steel pipes.

Jie Hou - One of the best experts on this subject based on the ideXlab platform.

  • Comparison of Surface Heat-Transfer Coefficient of GCr15 Steel Quenched by Clear Water and Nitrogen-Spray Water
    Applied Mechanics and Materials, 2013
    Co-Authors: Li Jun Hou, Bao Dong Shao, He Ming Cheng, Jie Hou
    Abstract:

    In order to simulate the thermal stresses, thermal strains and residual stresses of steel during quenching by numerical means, it is necessary to obtain an accurate boundary condition of temperature field. The explicit finite difference method, nonlinear estimate method and the experimental relation between temperature and time during Water and nitrogen-Spray Water quenching have been used to solve the inverse problem of heat conduction. The relations between surface heat-transfer coefficient in Water and nitrogen-Spray Water quenching and surface temperature of cylinder have been given. In numerical calculation, the thermal physical properties of material were treated as the function of temperature. The results show that the relations between surface heat-transfer coefficient and surface temperature are non-linear during Water and nitrogen-Spray Water quenching, the heat-transfer coefficient is bigger when Water quenching than when nitrogen-Spray Water before 580°C, the heat-transfer coefficient is smaller when Water quenching than when nitrogen-Spray Water after 400°C. The results of calculation coincided with the results of experiment. This method can effectively determine the surface heat-transfer coefficient during Water and nitrogen-Spray Water quenching.

  • Experimental Study on Nitrogen-Spray Water Quenching for 9SiCr
    Advanced Materials Research, 2012
    Co-Authors: Bao Dong Shao, He Ming Cheng, Li Jun Hou, Jie Hou, Li Feng Wang, Chong Tian, Rui Jie Wang, Dong Fang Ding
    Abstract:

    Alloy steel 9SiCr is quenched by a certain proportion of mixture gas of nitrogen and Spray Water at atmosphere, and the continual cooling curve during quenching is determined, the rigidity of quenched workpiece is measured and the metallographic map is captured. The results show that it can improve the cooling effect of quenching medium on the one hand; on the other hand, it can decrease the deformation and residual stress of workpieces. The results show that the rigidity of quenched workpiece is about 62 (HRC), which is corresponding with the rigidity after oil quenching. Martensite phase transformation occurs at the end of quenching that can be seen from the metallographic map.

  • Study on the Cooling Capacity of Different Quenchant
    Procedia Engineering, 2012
    Co-Authors: Li Jun Hou, Bao Dong Shao, He Ming Cheng, Jie Hou
    Abstract:

    Abstract Heat treatment is one method to improve mechanical properties of metal, but each heat treatment method has its advantages and disadvantages, therefore, different requirements regarding size, shape, and properties with respect to different heat treatment processes should be considered. The traditional liquid quenchant are clear Water and quench oil. Gas quenching is a relatively new process with several important advantages, such as minimal environmental impact, clean products, and ability to control the cooling locally and temporally for best product properties. To meet the high cooling rates required for quenching, the cooling gas must flow at very high velocities, but still the cooling capacity of gas is weakness. In order to increase the cooling capacity of gas, the Spray Water is added during gas quenching. In this paper, the GCr15 steel is as the research object, the cooling capacity of clear Water, quench oil, nitrogen and nitrogen-Spray Water are studied through comparison of temperature difference and cooling velocity of the specimen.

  • Study on Cooling Performance of Eject Quenching by Mixture of Nitrogen-Spray Water
    Applied Mechanics and Materials, 2011
    Co-Authors: Bao Dong Shao, He Ming Cheng, Li Jun Hou, Jie Hou, Li Feng Wang, Dong Fang Ding, Chong Tian
    Abstract:

    Though gas quenching has several advantages, such as minimal environmental impact, little deformation, low energy cost, clean products, and ability to control the cooling locally and temporally for best product properties, its cooling performance is less than that of oil and Water. If gas is mixed with Spray Water, the mixture will has favorable cooling performance. The cooling performance of eject quenching by mixture of Nitrogen-Spray Water is studied experimentally. Alloy steel 9SiCr is specimen, and it is quenched by a certain proportion of mixture gas of Nitrogen and Spray Water under normal pressure and high velocity, and the continual cooling curve is determined. The experimental results show that it can improve the cooling effect of quenching medium on the one hand; on the other hand, it can decrease the deformation and residual stress of specimen. The results also show that cooling performance of the mixture and cooling velocity can be enhanced by increasing gas pressure when the mixture ratio is fixed, and it takes short time to cool to room temperature. The cooling performance of the mixture and cooling velocity can be enhanced by increasing the mixture ratio under same pressure, and it also takes short time to cool to the room temperature. The continual cooling curve is determined, which gives the information of cooling performance of eject quenching by mixture of Nitrogen-Spray Water under Normal pressure changed with the pressure and the mixture ratio of Nitrogen and Spray Water.

  • Study on Surface Heat Transfer Coefficient of Mixture of Nitrogen-Spray Water Eject Quenching under Normal Pressure and High Velocity
    Applied Mechanics and Materials, 2011
    Co-Authors: Bao Dong Shao, He Ming Cheng, Li Jun Hou, Jie Hou, Li Feng Wang, Dong Fang Ding, Chong Tian
    Abstract:

    During mixture of Nitrogen and Spray Water ejecting quenching under normal pressure and high velocity, the liquid film that is formed on the surface of specimen to reduce the heat transfer between specimen and quenching media is removed on the one hand; on the other hand, the heat transfer performance of the mixture exceeds that of pure Nitrogen. Because the surface heat transfer coefficient is difficult to measure, according the cooling curve of surface and centre of specimen measured experimentally, the law of surface heat transfer coefficient and specimen temperature is calculated by nonlinear estimate methods and finite difference method based on inverse heat transfer method. The results show that the cooling performance of mixture of Nitrogen and Spray Water is as well as that of Water or oil. During quenching, the surface heat transfer coefficient increases rapidly at begin, and at temperature of 170 °C, the surface heat transfer coefficient decreases. During martensite phase transformation, the latent heat is used to increase drive force of phase transformation and to overcome resistance of phase transformation, thus the martensite phase transformation can fulfill.

Bao Dong Shao - One of the best experts on this subject based on the ideXlab platform.

  • Martensite Phase Transform during Nitrogen-Spray Water Jet Quenching
    Advanced Materials Research, 2013
    Co-Authors: Li Feng Wang, Bao Dong Shao, He Ming Cheng, Chong Tian
    Abstract:

    Nitrogen-Spray Water jet quenching is a new kind of quenching, whose cooling velocity can be controlled. Thus different phase can be achieved according requirement, which can improve the characteristic of material. 9SiCr alloy steel was tested during Nitrogen-Spray Water jet quenching. The continuous cooling curves of 9SiCr under mixture of Nitrogen-Spray Water quenching for different pressure and mixture ratio of Nitrogen and Spray Water are obtained. After quenching, the metallographic structures were investigated, in which the uniform martensite was obtained after quenching.

  • Comparison of Surface Heat-Transfer Coefficient of GCr15 Steel Quenched by Clear Water and Nitrogen-Spray Water
    Applied Mechanics and Materials, 2013
    Co-Authors: Li Jun Hou, Bao Dong Shao, He Ming Cheng, Jie Hou
    Abstract:

    In order to simulate the thermal stresses, thermal strains and residual stresses of steel during quenching by numerical means, it is necessary to obtain an accurate boundary condition of temperature field. The explicit finite difference method, nonlinear estimate method and the experimental relation between temperature and time during Water and nitrogen-Spray Water quenching have been used to solve the inverse problem of heat conduction. The relations between surface heat-transfer coefficient in Water and nitrogen-Spray Water quenching and surface temperature of cylinder have been given. In numerical calculation, the thermal physical properties of material were treated as the function of temperature. The results show that the relations between surface heat-transfer coefficient and surface temperature are non-linear during Water and nitrogen-Spray Water quenching, the heat-transfer coefficient is bigger when Water quenching than when nitrogen-Spray Water before 580°C, the heat-transfer coefficient is smaller when Water quenching than when nitrogen-Spray Water after 400°C. The results of calculation coincided with the results of experiment. This method can effectively determine the surface heat-transfer coefficient during Water and nitrogen-Spray Water quenching.

  • The Investigation of Performance of Gas-Spray Water Quenching
    Advanced Materials Research, 2012
    Co-Authors: Chong Tian, Bao Dong Shao, Li Feng Wang, He Ming Cheng
    Abstract:

    In order to study the performance of gas-Spray Water quenching, the gas-Spray Water quenching test to 9SiCr alloy steel was conducted. After quenching , the hardness and metallographic structures were investigated. The results show that the hardness of the specimen was greatly improved, and the inner hardness was a little higher than the outer. Besides, the uniform martensite was obtained after quenching.

  • Experimental Study on Nitrogen-Spray Water Quenching for 9SiCr
    Advanced Materials Research, 2012
    Co-Authors: Bao Dong Shao, He Ming Cheng, Li Jun Hou, Jie Hou, Li Feng Wang, Chong Tian, Rui Jie Wang, Dong Fang Ding
    Abstract:

    Alloy steel 9SiCr is quenched by a certain proportion of mixture gas of nitrogen and Spray Water at atmosphere, and the continual cooling curve during quenching is determined, the rigidity of quenched workpiece is measured and the metallographic map is captured. The results show that it can improve the cooling effect of quenching medium on the one hand; on the other hand, it can decrease the deformation and residual stress of workpieces. The results show that the rigidity of quenched workpiece is about 62 (HRC), which is corresponding with the rigidity after oil quenching. Martensite phase transformation occurs at the end of quenching that can be seen from the metallographic map.

  • Study on the Cooling Capacity of Different Quenchant
    Procedia Engineering, 2012
    Co-Authors: Li Jun Hou, Bao Dong Shao, He Ming Cheng, Jie Hou
    Abstract:

    Abstract Heat treatment is one method to improve mechanical properties of metal, but each heat treatment method has its advantages and disadvantages, therefore, different requirements regarding size, shape, and properties with respect to different heat treatment processes should be considered. The traditional liquid quenchant are clear Water and quench oil. Gas quenching is a relatively new process with several important advantages, such as minimal environmental impact, clean products, and ability to control the cooling locally and temporally for best product properties. To meet the high cooling rates required for quenching, the cooling gas must flow at very high velocities, but still the cooling capacity of gas is weakness. In order to increase the cooling capacity of gas, the Spray Water is added during gas quenching. In this paper, the GCr15 steel is as the research object, the cooling capacity of clear Water, quench oil, nitrogen and nitrogen-Spray Water are studied through comparison of temperature difference and cooling velocity of the specimen.

Zeju Che - One of the best experts on this subject based on the ideXlab platform.

  • heat transfer modeling of an annular on line Spray Water cooling process for electric resistance welded steel pipe
    PLOS ONE, 2015
    Co-Authors: Zeju Che, Guangjie Huang
    Abstract:

    On-line Spray Water cooling (OSWC) of electric-resistance-welded (ERW) steel pipes can replace the conventional off-line heat treatment process and become an important and critical procedure. The OSWC process improves production efficiency, decreases costs, and enhances the mechanical properties of ERW steel pipe, especially the impact properties of the weld joint. In this paper, an annular OSWC process is investigated based on an experimental simulation platform that can obtain precise real-time measurements of the temperature of the pipe, the Water pressure and flux, etc. The effects of the modes of annular Spray Water cooling and related cooling parameters on the mechanical properties of the pipe are investigated. The temperature evolutions of the inner and outer walls of the pipe are measured during the Spray Water cooling process, and the uniformity of mechanical properties along the circumferential and longitudinal directions is investigated. A heat transfer coefficient model of Spray Water cooling is developed based on measured temperature data in conjunction with simulation using the finite element method. Industrial tests prove the validity of the heat transfer model of a steel pipe undergoing Spray Water cooling. The research results can provide a basis for the industrial application of the OSWC process in the production of ERW steel pipes.

He Ming Cheng - One of the best experts on this subject based on the ideXlab platform.

  • Martensite Phase Transform during Nitrogen-Spray Water Jet Quenching
    Advanced Materials Research, 2013
    Co-Authors: Li Feng Wang, Bao Dong Shao, He Ming Cheng, Chong Tian
    Abstract:

    Nitrogen-Spray Water jet quenching is a new kind of quenching, whose cooling velocity can be controlled. Thus different phase can be achieved according requirement, which can improve the characteristic of material. 9SiCr alloy steel was tested during Nitrogen-Spray Water jet quenching. The continuous cooling curves of 9SiCr under mixture of Nitrogen-Spray Water quenching for different pressure and mixture ratio of Nitrogen and Spray Water are obtained. After quenching, the metallographic structures were investigated, in which the uniform martensite was obtained after quenching.

  • Comparison of Surface Heat-Transfer Coefficient of GCr15 Steel Quenched by Clear Water and Nitrogen-Spray Water
    Applied Mechanics and Materials, 2013
    Co-Authors: Li Jun Hou, Bao Dong Shao, He Ming Cheng, Jie Hou
    Abstract:

    In order to simulate the thermal stresses, thermal strains and residual stresses of steel during quenching by numerical means, it is necessary to obtain an accurate boundary condition of temperature field. The explicit finite difference method, nonlinear estimate method and the experimental relation between temperature and time during Water and nitrogen-Spray Water quenching have been used to solve the inverse problem of heat conduction. The relations between surface heat-transfer coefficient in Water and nitrogen-Spray Water quenching and surface temperature of cylinder have been given. In numerical calculation, the thermal physical properties of material were treated as the function of temperature. The results show that the relations between surface heat-transfer coefficient and surface temperature are non-linear during Water and nitrogen-Spray Water quenching, the heat-transfer coefficient is bigger when Water quenching than when nitrogen-Spray Water before 580°C, the heat-transfer coefficient is smaller when Water quenching than when nitrogen-Spray Water after 400°C. The results of calculation coincided with the results of experiment. This method can effectively determine the surface heat-transfer coefficient during Water and nitrogen-Spray Water quenching.

  • The Investigation of Performance of Gas-Spray Water Quenching
    Advanced Materials Research, 2012
    Co-Authors: Chong Tian, Bao Dong Shao, Li Feng Wang, He Ming Cheng
    Abstract:

    In order to study the performance of gas-Spray Water quenching, the gas-Spray Water quenching test to 9SiCr alloy steel was conducted. After quenching , the hardness and metallographic structures were investigated. The results show that the hardness of the specimen was greatly improved, and the inner hardness was a little higher than the outer. Besides, the uniform martensite was obtained after quenching.

  • Experimental Study on Nitrogen-Spray Water Quenching for 9SiCr
    Advanced Materials Research, 2012
    Co-Authors: Bao Dong Shao, He Ming Cheng, Li Jun Hou, Jie Hou, Li Feng Wang, Chong Tian, Rui Jie Wang, Dong Fang Ding
    Abstract:

    Alloy steel 9SiCr is quenched by a certain proportion of mixture gas of nitrogen and Spray Water at atmosphere, and the continual cooling curve during quenching is determined, the rigidity of quenched workpiece is measured and the metallographic map is captured. The results show that it can improve the cooling effect of quenching medium on the one hand; on the other hand, it can decrease the deformation and residual stress of workpieces. The results show that the rigidity of quenched workpiece is about 62 (HRC), which is corresponding with the rigidity after oil quenching. Martensite phase transformation occurs at the end of quenching that can be seen from the metallographic map.

  • Study on the Cooling Capacity of Different Quenchant
    Procedia Engineering, 2012
    Co-Authors: Li Jun Hou, Bao Dong Shao, He Ming Cheng, Jie Hou
    Abstract:

    Abstract Heat treatment is one method to improve mechanical properties of metal, but each heat treatment method has its advantages and disadvantages, therefore, different requirements regarding size, shape, and properties with respect to different heat treatment processes should be considered. The traditional liquid quenchant are clear Water and quench oil. Gas quenching is a relatively new process with several important advantages, such as minimal environmental impact, clean products, and ability to control the cooling locally and temporally for best product properties. To meet the high cooling rates required for quenching, the cooling gas must flow at very high velocities, but still the cooling capacity of gas is weakness. In order to increase the cooling capacity of gas, the Spray Water is added during gas quenching. In this paper, the GCr15 steel is as the research object, the cooling capacity of clear Water, quench oil, nitrogen and nitrogen-Spray Water are studied through comparison of temperature difference and cooling velocity of the specimen.