金属加工（热加工）Issue(1)：92-95,4.
大型中间轴55钢锻件晶粒度控制研究
Research on grain size control of C55E+N forgings for large intermediate shafts
摘要
Abstract
In view of the problem that coarseness is very easy to occur in C55E+N intermediate shaft forging,austenite coarsening tests at 820～980℃and normalizing tests at 770～920℃were carried out to study the critical temperature leading to severe grain coarsening and the influence of different normalizing temperatures on the microstructure of C55E+N.The results show that the C55E+N grains are coarsened seriously when the temperature is heated to 950℃.When the normalizing temperature is 860℃,the mesh ferrite can be eliminated while the grain is refined,and the good microstructure can be obtained.Based on the research results,the forging and normalizing process of intermediate shaft are improved,and the problem of detecting coarse crystals is effectively solved.关键词
55钢/晶粒度/奥氏体粗化温度/正火温度Key words
C55E+N/grain size/austenite coarsening temperature/normalizing temperature引用本文复制引用
张博,于保宁,杨杜航,梁帅,王继业..大型中间轴55钢锻件晶粒度控制研究[J].金属加工（热加工）,2024,(1):92-95,4.基金项目
河南省重大科技专项资助项目(221100230200). （221100230200）
