汽车高强钢的热处理工艺优化研究  

Optimization of Heat Treatment Process for Automobile High Strength Steel

作　　者：高云[1] 邵立新[1] 

机构地区：[1]河南职业技术学院,河南郑州450046

出　　处：《热加工工艺》2016年第14期204-207,共4页Hot Working Technology

基　　金：河南省软科学研究计划项目(132400410039)

摘　　要：采用不同的奥氏体化温度、淬火温度和回火温度,对QP980汽车高强钢试样进行了热处理,分析了试样的显微组织、拉伸性能和冲击性能。结果表明:奥氏体化温度和淬火温度对试样残余奥氏体含量有明显影响,回火温度对试样残余奥氏体含量无明显影响。奥氏体化温度、淬火温度和回火温度均对试样的平均晶粒尺寸、抗拉强度、屈服强度、断后伸长率和冲击韧度有明显影响。QP980汽车高强钢的热处理工艺优选为:奥氏体化温度1030℃、淬火温度60℃、回火温度480℃。The heat treatment of QP980 high strength steel sample was carried out by using different austenitizing temperatures, quenching temperatures and tempering temperatures. The microstructure, tensile properties and impact property were analyzed. The results show that the austenite temperature and quenching temperature have obvious influence on the residual austenite content of the samples. The tempering temperature has no significant effect on the content of retained austenite. The austenitizing temperature, quenching temperature and tempering temperature have obvious influence on the average grain size, tensile strength, yield strength, elongation and impact toughness. The heat treatment process of QP980 automobile high strength steel is selected as follows： the austenitic temperature is 1030℃, the quenching temperature is 60℃, and the tempering temperature is 480℃.

关 键 词：汽车高强钢 奥氏体化温度 淬火温度 回火温度 残余奥氏体含量 

分 类 号：TG156[金属学及工艺—热处理]