回火温度对1000 MPa级超高强钢的组织与力学性能的影响  

Effect of Tempering Temperature on Microstructure and Mechanical Properties of 1,000 MPa Ultra-High Strength Steel

作　　者：王海波[1] 王承剑 胡学文[1] 彭欢[1] 石东亚 WANG Haibo;WANG Chengjian;HU Xuewen;PENG Huan;SHI Dongya(The Technology Center of Maanshan Iron and Steel Co.,Ltd.,Maanshan,Anhui 243003,China)

机构地区：[1]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243003

出　　处：《冶金动力》2020年第12期75-78,共4页Metallurgical Power

基　　金：安徽省科技重大专项资助项目(18030901075)。

摘　　要：采用回火试验模拟1000 MPa级超高强钢热轧生产过程中卷取后的冷却过程,利用OM、SEM和电子拉伸试验机等,研究了回火温度对1000 MPa级超高强钢的组织和力学性能的影响。研究结果表明,回火温度大于150℃,试验钢连续屈服特征消失并出现明显的屈服平台;350℃为该试验钢临界回火温度,低于350℃回火可以显著提高试验钢的屈服强度和屈强比;试验钢马氏体组织的分解随着回火温度的升高而加剧、从而导致碳化物析出相含量增加,并且逐渐球化演变成颗粒状。The effect of tempering temperature on the microstructure and mechanical properties of 1,000 MPa ultra-high strength steel was studied by means of OM,SEM and electronic tensile testing machine.The results show that when the tempering temperature is higher than 150℃,the continuous yield characteristics of the test steel disappear and an obvious yield plateau appears;350℃is the critical tempering temperature of the test steel,and tempering below 350℃can significantly improve the yield strength and yield ratio of the test steel;With the increase of tempering temperature,the decomposition of martensite in the test steel increases,which leads to the increase of carbide precipitates,and gradually spheroidize into particles.

关 键 词：回火温度 1000 MPa级超高强钢 显微组织 力学性能 

分 类 号：TG142.7[一般工业技术—材料科学与工程]