基于锻后热处理响应的SA508 Gr.3Cl.1钢锻造工艺容限研究  

Research of Forging Processing Window for SA508 Gr.3Cl.1 Steel Based on Response of Heat Treatment after Forging

作　　者：马璟 刘建生[1] 贾祥[1] MA Jingu;LIU Jiansheng;JIA Xiang(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471000,China)

机构地区：[1]太原科技大学材料科学与工程学院,山西太原030024 [2]河南科技大学材料科学与工程学院,河南洛阳471000

出　　处：《热加工工艺》2022年第7期48-51,共4页Hot Working Technology

基　　金：山西省自然科学基金重点项目(2016011002)。

摘　　要：通过平面压缩变形试验研究了热变形对SA508 Gr.3Cl.1钢锻后晶粒尺寸的影响及锻后晶粒尺寸与正火后晶粒尺寸的关系。结果表明,热变形温度和应变量对锻后晶粒尺寸影响较大,而对正火后晶粒尺寸影响不大。正火后晶粒细化均匀,晶粒尺寸约为20μm。根据正火后晶粒度对锻后晶粒度的响应关系,SA508 Gr.3Cl.1钢组织遗传性极小,说明正火后晶粒尺寸对锻后晶粒尺寸不敏感。因此,从晶粒度的角度出发,SA508 Gr.3Cl.1钢锻件锻造过程关注的重点应该是零件形状尺寸,这对降低难成形复杂大锻件的锻造具有重要意义。The effect of the hot deformation on the grain size of SA508 Gr.3Cl.1 steel after forging and the corresponding relation between the grain size after forging and the grain size after normalizing were studied by plane compression deformation test. The results show that the temperature and deformation have a great influence on the grain size after forging,while it have little effect on the grain size after normalizing. The grain size after normalizing is fine and uniform, which is about 20 μm. According to the response relationship between normalized grain size and grain size after forging, SA508 Gr.3Cl.1 steel has little microstructure heredity, which means that the grain size after normalizing is not sensitive to one after forging. Thus, from the point of grain size, the focus of the SA508 Gr.3Cl.1 steel forging process should be on the part shape and size, which has significance for reducing its forging difficulty for forging process of complex and large forgings.

关 键 词：SA508 Gr.3Cl.1钢 大锻件 锻造组织 正火组织 

分 类 号：TG316[金属学及工艺—金属压力加工] TG314