试样尺寸对冷轧板拉伸曲线的影响  

The influence of sample size on the tensile curve of cold-rolled sheet

作　　者：张宏岭 向前 金鑫 刘善青 陈慈辉 王心 ZHANG Hongling;XIANG Qian;JIN Xin;LIU Shanqing;CHEN Cihui;WANG Xin(Quality Inspection Center,WISCO,Wuhan 430083,China)

机构地区：[1]武钢有限公司质检中心,武汉430083

出　　处：《理化检验(物理分册)》2025年第2期17-21,共5页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：对有明显屈服现象的冷轧材料进行拉伸试验,发现曲线在均匀塑性变形阶段出现异常波动现象。对不同尺寸的试样进行拉伸试验,分析试样宽度对拉伸曲线的影响。结果表明:拉伸试样的夹持段宽度与平行段宽度比值不合理,造成拉伸曲线出现异常波动现象。采用增大液压夹具夹持段与平行段宽度比值的取样方式,或增大夹持面的面积,可以避免曲线出现异常波动。Tensile tests were conducted on cold-rolled materials with obvious yielding phenomena,and abnormal fluctuations were found in the curve during the uniform plastic deformation stage.Conducted tensile tests on samples of different sizes and analyzed the effect of sample width on the tensile curve.The results show that the ratio of the clamping section width to the parallel section width of the tensile specimen was unreasonable,resulting in abnormal fluctuations in the tensile curve.The samling method of increasing the ratio of the width of the hydraulic fixture clamping section to the paralled section or increased the area of the clamping surface could avoid abnormal fluctuations in the curve.

关 键 词：冷轧板 试样尺寸 拉伸曲线 均匀塑性变形 异常波动 

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]