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.
作者
马璟
刘建生
贾祥
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)
出处
《热加工工艺》
北大核心
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)。
