Phase change materials as quenching media for heat treatment of 42CrMo4 steels石蜡相变材料作 42CrMo4 钢的热处理淬火介质

被引：0
作者：
Milad Sakkaki
Farhad Sadegh Moghanlou
Soroush Parvizi
Haniyeh Baghbanijavid
Aziz Babapoor
Mehdi Shahedi Asl
机构：
[1] University of Mohaghegh Ardabili,Department of Mechanical Engineering
[2] Shahid Rajaee Teacher Training University,Department of Materials Engineering
[3] University of Mohaghegh Ardabili,Department of Chemical Engineering
来源：
Journal of Central South University | 2020年 / 27卷
关键词：
phase change materials; heat treatment; quenchant; 42CrMo4 steel; microstructure; mechanical property; 相变材料; 热处理; 淬火; 42CrMo4 钢; 显微组织; 力学性能;
D O I：
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学科分类号：
摘要：
In the present work, paraffin phase change material is used as quenchant for the heat treatment of 42CrMo4 alloy and compared with water, air, and CuO doped paraffin. The samples were prepared based on ASTM E 8M-98 standard for tensile test and then heated up to 830 °C, kept for 4 h in an electric resistance furnace and then quenched in the mentioned media. Elastic modulus, yield strength, ultimate tensile strength, elongation, and modulus of toughness were determined according to the obtained stress-strain curves. Moreover, the hardness and microstructural evolution were investigated after the heat treatment at different media. The samples quenched in paraffin and CuO-doped paraffin are higher in ultimate tensile strength (1439 and 1306 MPa, respectively) than those quenched in water (1190 MPa) and air (1010 MPa). The highest hardness, with a value of HV 552, belonged to the sample quenched in CuO-doped paraffin. The microstructural studies revealed that the non-tempered steel had a ferrite/pearlite microstructure, while by quenching in water, paraffin and CuO-doped paraffin, ferrite/martensite microstructures were achieved. It is also observed that using the air as quenchant resulted in a three-phase bainite/martensite/ferrite microstructure.
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页码：752 / 761
页数：9
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