TY - JOUR
T1 - Experimental study on vacuum carburizing process for low-carbon alloy steel
AU - Wei, Shaopeng
AU - Wang, Gang
AU - Zhao, Xianhui
AU - Zhang, Xiaopeng
AU - Rong, Yiming
PY - 2014/2
Y1 - 2014/2
N2 - As a low-carbon alloy steel, 20Cr2Ni4A steel has an excellent mechanical properties. It has been used for producing heavy-duty gears, which require good wear and fatigue resistance. The vacuum carburizing process can improve the quality of gears and extend the service life. In this article, a complete heat-treatment process for 20Cr2Ni4A, with carburizing, tempering, quenching and cryogenic steps involved, was proposed. A numerical method was employed to design the carburizing step. The carburized samples were characterized by analysis of carbon profile, surface-retained austenite content, microstructure, and hardness profile. A good microstructure was obtained with acicular-tempered martensite, less-retained austenite, fine granular-dispersed carbides, and was oxide free. The final surface hardness was 64.2HRC, and the case depth was 0.86 mm, which meet the requirements of products. The relationships among process, performance, and microstructure were investigated to understand the inner connection.
AB - As a low-carbon alloy steel, 20Cr2Ni4A steel has an excellent mechanical properties. It has been used for producing heavy-duty gears, which require good wear and fatigue resistance. The vacuum carburizing process can improve the quality of gears and extend the service life. In this article, a complete heat-treatment process for 20Cr2Ni4A, with carburizing, tempering, quenching and cryogenic steps involved, was proposed. A numerical method was employed to design the carburizing step. The carburized samples were characterized by analysis of carbon profile, surface-retained austenite content, microstructure, and hardness profile. A good microstructure was obtained with acicular-tempered martensite, less-retained austenite, fine granular-dispersed carbides, and was oxide free. The final surface hardness was 64.2HRC, and the case depth was 0.86 mm, which meet the requirements of products. The relationships among process, performance, and microstructure were investigated to understand the inner connection.
KW - low-carbon alloy steel
KW - microstructure
KW - process design
KW - vacuum carburizing
UR - http://www.scopus.com/inward/record.url?scp=84893790082&partnerID=8YFLogxK
U2 - 10.1007/s11665-013-0762-1
DO - 10.1007/s11665-013-0762-1
M3 - Article
AN - SCOPUS:84893790082
SN - 1059-9495
VL - 23
SP - 545
EP - 550
JO - Journal of Materials Engineering and Performance
JF - Journal of Materials Engineering and Performance
IS - 2
ER -