Determination and Analysis of the CCT Curve of 52CrMoV4 Spring Steel
WAN Yuan
ZHANG Jinxin
LI Ze
LIU Yuanbo
ZHANG Zengrui
Abstract：In this experiment,52CrMoV4 spring steel was selected as the experimental material for the determination and analysis of the continuous cooling transition curve,by using hot-rolled 52CrMoV4 spring steel processed into specimens with a diameter of 4 mm and a length of 10 mm.The continuous cooling transition temperature(CCT)curve for 52CrMoV4 spring steel was obtained using the thermal expansion method combined with metallographic observation and microhardness analysis,where the critical temperatures were:Ac1=765 ℃,Ac3=814 ℃ and Ms=292 ℃.As the cooling rate increases,the martensite in the steel increases as the cooling rate becomes faster,while the bainite becomes less and less,and at a cooling rate of 2 ℃/s,the pearlite and ferrite in the steel disappear completely,and at 10 ℃/s,the bainite basically disappears and all the steel is transformed into martensite.Microhardness values also show a clear upward trend,from 276 HV to 826 HV.
Keywords：spring flat steelCCT curveVickers hardnessmetallographic organization
Publication Date：2023-12-20
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 41-43 )