摘要
根据GB/T228.1-2010中断后伸长率的测量方法,选取塑性富余量较小的BW300TP耐磨钢板进行拉伸试验,分析了采用机器测量方法和手工测量方法测得的断后伸长率结果有差异的原因,并对标准提出修订建议。结果表明:因断裂位置偏离标距中心,机器测量的断后伸长率小于手工测量的断后伸长率,可用关系式y=0.8505x+5.1838对机器测量的断后伸长率结果进行补偿和修正。建议GB/T228.1-2010中P7带头试样的平行长度最小值修改为60mm;取消附录D中矩形截面非比例试样平行长度L_(c)≥L_(0)+1.5√S_(0)的规定;增加不同试验材料的机器测量断后伸长率的修正方法及修正建议值。
According to GB/T228.1-2010measurementmethodofelongation after fracture,BW300TP wear-resistant steel plate with small plastic surplus was selected for tensile test,and the reasons for the difference of elongation after fracture measured by machine-measured method and hand-measured method were analyzed,and some suggestions for revising the standard were put forward.The results show that the elongation after fracture measured by machine was less than that measured by hand because the fracture position deviated from the center of gauge length.The formula y=0.8505x+5.1838 could be used to compensate and correct the elongation after fracture.It is suggested that the minimum parallel length of P7lead sample in GB/T228.1-2010bemodifiedto 60mm,cancel the stipulation of parallel length of non-proportional sample with rectangular section in Appendix D L_(c)≥L_(0)+15√S_(0),and add the correction method and recommended value of elongation after fracture for machinemeasured of different test materials.
作者
卢美娇
李荣锋
吕超
历妍
LU Meijiao;LI Rongfeng;Lü Chao;LI Yan(Products&Technique Management Department,Baosteel Zhanjiang Iron and Steel Co.,Ltd.,Zhanjiang 524072,China;Centre of Excellence for Advanced Materials,Dongguan 523808,China;Science and Technology on Reactor Fuel and Materials Laboratory,Nuclear Power Institute of China,Chengdu 610213,China)
出处
《理化检验（物理分册）》
CAS
2021年第4期15-18,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
基金
广东省基础与应用基础研究重大项目(2019B030302011)
反应堆燃料及材料重点实验室稳定支持课题(JCKYS2019201073)。
关键词
断后伸长率
测量方法
补偿修正
平行长度
断后标距
elongation after fracture
measurement method
compensation correction
parallel length
gauge length after fracture
