低碳钢金相试样铁素体晶粒表面发灰原因  

Reason for the ferrite grains surface graying in low carbon steel metallographic specimen

作　　者：施杨宇 周漫琳 徐嘉发 曾德蒙 周信安 李维俊 SHI Yangyu;ZHOU Manlin;XU Jiafa;ZENG Demeng;ZHOU Xin'an;LI Weijun(School of Materials Science and Engineering,Baise University,Baise 533000,China;College of Ecological Aluminum Industry,Baise University,Baise 533000,China;Engineering Research Center of Advanced Aluminium Matrix Materials of Guangxi Province,Baise 533000,China)

机构地区：[1]百色学院材料科学与工程学院,百色533000 [2]百色学院生态铝产业学院,百色533000 [3]广西壮族自治区铝基新材料工程研究中心,百色533000

出　　处：《理化检验（物理分册）》2023年第11期43-47,共5页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：2022年度广西高校中青年教师科研基础能力提升项目(2022KY0740);2022年度百色市科学研究与技术开发计划项目(百科20221480);百色学院2022年大学生创新创业训练计划项目区级(202210609234)。

摘　　要：在对某低碳钢进行金相检验的过程中,发现其铁素体晶粒表面发灰。采用金相检验、腐蚀试验和划痕试验等方法研究了晶粒表面发灰的原因。结果表明:试样表面残留抛光划痕,使试样表面粗糙度变大,造成了漫反射现象;每个晶粒的位向不同,抛光划痕引起的内应力也不同,使得每个晶粒的腐蚀程度不同,从而引起了表面形貌的差异,最终导致铁素体晶粒表面发灰。During the metallographic examination of a low carbon steel,it was found that the surface of ferrite grains turned gray.The reason for the surface graying of grains was studied by metallographic examination,corrosion test and scratch test.The results show that the reason for the graying of the grains was the residual polishing scratches on the surface of the sample,which increased the surface roughness of the sample and caused diffuse reflection phenomenon.The orientation of each grain was different,and the internal stress caused by polishing scratches was also different,resulting in different degrees of corrosion for each grain,which led to differences in surface morphology and ultimately led to graying of the ferrite grain surface.

关 键 词：低碳钢 金相检验 灰晶粒 表面形貌 抛光划痕 

分 类 号：TG115.2[金属学及工艺—物理冶金] TB31[金属学及工艺—金属学]