52CrMoV4弹簧扁钢的端淬特性  

Jominy end quenching characteristics of 52CrMoV4 leaf spring steel

作　　者：张文涛[1] 刘超 杜垚 闵永安[1] Zhang Wentao;Liu Chao;Du Yao;Min Yongan(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China;Hebei Yongyang Special Steel Group Co.,Ltd.,Handan Hebei 057150,China)

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]河北永洋特钢集团有限公司,河北邯郸057150

出　　处：《金属热处理》2024年第4期12-17,共6页Heat Treatment of Metals

基　　金：河北省重大科技成果转化专项(20281009Z)。

摘　　要：在大规格52CrMoV4热轧弹簧扁钢上取样,进行端淬试验,研究900℃×1 h的正火预处理和850、900℃的奥氏体化对52CrMoV4钢端淬性能的影响。结果表明,热轧扁钢在850℃端淬后,淬火硬度较低,端淬硬度曲线波动较大,带状组织明显,该温度端淬在一定程度上反映了钢材成分均匀程度。热轧扁钢在900℃端淬后能够获得更高的硬度。端淬前的正火处理能使整体硬度得到提升,但其提升效果不如提高淬火温度明显。52CrMoV4钢板簧生产中,采用900℃淬火能稳定获得60 HRC左右的高硬度,提升钢板弹簧的淬火工艺性。Jominy end quenching test were carried out on 52CrMoV4 large specification leaf spring steel to investigate the effects of normalizing pretreatment at 900℃for 1 h and austenitizing at 850℃and 900℃on Jominy end quenching characteristic of the 52CrMoV4 leaf spring steel.The results show that the end⁃quenching hardness of hot⁃rolled steel after austenitizing at 850℃is lower and banded microstructure is more obvious and the end⁃quenching curve fluctuates greatly,which can reflect the uniformity of chemical composition distribution to some degree.Hot⁃rolled steel austenitized at 900℃can reach higher hardness and normalizing before quenching can stabilize the overall hardness of 52CrMoV4 leaf spring steel.During 52CrMoV4 steel leaf spring manufacturing process,900℃austenitizing temperature is adopted to acquire higher hardness around 60 HRC,displaying better quenching properties.

关 键 词：弹簧扁钢 淬透性 组织均匀性 硬度 

分 类 号：TG142.1[一般工业技术—材料科学与工程]