20CrMnTi钢齿轮锻件表面缺陷产生原因  

Causes of surface defects of 20CrMnTi steel gear forgings

作　　者：杨娥 周杨 曹广 刘月云 YANG E;ZHOU Yang;CAO Guang;LIU Yueyun(Hubei Key Laboratory of High Quality Special Steel,Daye Special Steel Co.,Ltd.,Huangshi 435001,China)

机构地区：[1]大冶特殊钢有限公司高品质特殊钢湖北省重点实验室,黄石435001

出　　处：《理化检验（物理分册）》2023年第10期62-65,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：在车削某20CrMnTi钢齿轮毛坯时,发现其表面有点状缺陷,采用宏观观察、化学成分分析、扫描电镜和能谱分析、金相检验等方法分析点状缺陷的产生原因。结果表明:热锻前加热时,加热炉中的耐火材料颗粒黏附在材料表面,热锻时这些颗粒被挤压在钢材中,从而形成了点状缺陷。When turning a 20CrMnTi steel gear blank,it was found that there were spot defects on the surface.The causes of point defects were analyzed by macroscopic observation,chemical composition analysis,scanning electron microscopy and energy spectrum analysis,metallographic examination and other methods.The results show that when heating before hot forging,the refractory particles in the heating furnace adhered to the surface of the material,and these particles were squeezed into the steel during hot forging,thus forming point defects.

关 键 词：热锻 耐火材料 点状缺陷 

分 类 号：TB31[一般工业技术—材料科学与工程] TG115.2[金属学及工艺—物理冶金]