不同涂镀层对冷轧板拉伸性能的影响  

Influence of different coatings on tensile properties of cold-rolled plate

作　　者：张宏岭 向前 张彦文 刘善青 金鑫 王心 ZHANG Hongling;XIANG Qian;ZHANG Yanwen;LIU Shanqing;JIN Xin;WANG Xin(Wuhan Iron and Steel Co.,Ltd.Quality Inspection Center,Wuhan 430080,China)

机构地区：[1]武汉钢铁有限公司质检中心,湖北武汉430080

出　　处：《物理测试》2025年第1期14-19,共6页Physics Examination and Testing

摘　　要：本文分析了热镀锌镀层、热镀锌铁合金镀层、电镀锌层3种镀层对冷轧板拉伸性能的影响,采用0.5级拉伸试验机对不同镀层的IF级冷轧板进行拉伸性能测试,比对去除镀层前后的拉伸性能。结果表明:电镀锌去镀层前后拉伸性能无明显差异;热镀锌去镀层前后屈服强度、应变硬化指数(n值)、塑性应变比(r值)有差异;热镀锌铁合金去镀层前后的各项拉伸性能均有差异,r值差异最显著,达0.35。通过扫描电子显微镜(SEM)观测表面及断面,热镀锌铁合金镀层断裂时产生微小裂纹,对r值的测量影响显著。The influences of three kinds of coating,i.e.,hot-dip galvanizing coating,hot-dip galvanized iron alloy coating and electroplating galvanizing coating,on the tensile properties of cold-rolled plate were analyzed in this paper.The tensile properties of IF-grade cold-rolled plate with different coatings were measured by 0.5 grade tensile tester,and the tensile properties before and after coating removal were compared.The results showed that there was no obvious difference in tensile properties before and after electroplating galvanized coating removal.The yield strength,strain hardening exponent(n value)and plastic strain ratio(r value)were different before and after hot dip galvanized coating removal.The tensile properties before and after hot-dip galvanized iron alloy coating removal were different,and the difference of r value was most significant,which reached 0.35.The surface and fracture were observed by scanning electron microscope(SEM).It was found that the tiny cracks were produced during the fracture of hot-dip galvanized iron alloy coating,which had a great impact on the measurement of r value.

关 键 词：镀层 冷轧板 扫描电子显微镜(SEM) 拉伸性能 热镀锌镀层 热镀锌铁合金镀层 电镀锌层 

分 类 号：TG1[金属学及工艺—金属学]