摘要
利用膨胀法在DIL805A型淬火膨胀仪对第三代航空轴承钢CSS-42L开展了临界点测定及冷却速度0.02~40℃/s的连续冷却转变试验,绘制了静态CCT曲线,并对室温下的显微组织以及维氏硬度进行分析。结果表明,CSS-42L钢的临界点Ac_(1)和Ac_(3)分别为655℃和738℃;连续冷却转变过程中,不同冷速下均只发生马氏体转变,随着冷却速度的降低,马氏体转变起始点降低;CSS-42L钢在冷却速度为1.6℃/s时,其硬度值最大为330 HV50。
Critical point and the continuous cooling transformation test of the third generation aviation bearing steel CSS-42L at cooling rate of 0.02-40℃/s were carried out by DIL805A quenching dilatometer with dilatometric method.The static CCT curve was drawn,and the microstructure and Vickers hardness at room temperature were analyzed.The results show that the critical points Ac_(1) and Ac_(3) of the CSS-42L steel are 655℃and 738℃,respectively.In the process of continuous cooling,only martensitic transformation occurs at different cooling rates,and the starting temperature of martensitic transformation decreases with the decrease of cooling rate.The tested CSS-42L steel has a maximum microhardness of 330 HV50 at the cooling rate of 1.6℃/s.
作者
田仲杰
张雲飞
曹文全
赵英利
王艳
白丽娟
崔毅
Tian Zhongjie;Zhang Yunfei;Cao Wenquan;Zhao Yingli;Wang Yan;Bai Ljuan;Cui Yi(HBIS Material Technology Research Institute,Shijiazhuang Hebei 052165,China;Hebei Dahe Material Technology Co.,Ltd.,Shijiazhuang Hebei 052165,China;Research Institute of Special Steel,Central Iron and Steel Research Institute Co.,Ltd.,Beijing 100081,China;HBIS Company Limited,Shijiazhuang Hebei 050023,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2024年第12期175-178,共4页
Heat Treatment of Metals
关键词
CSS-42L轴承钢
临界点
连续冷却转变
显微硬度
CSS-42L bearing steel
critical point
continuous cooling transformation
microhardness
