拉伸速率对低碳钢和铸铁力学性能的影响及分析  

Effect and Analysis of Tensile Rate on Mechanical Properties of Low-carbon Steel and Cast Iron

作　　者：阎宇杰[1] 隋昕展 魏盼军 崔佳明 陈天阔 YAN Yujie;SUI Xinzhan;WEI Panjun;CUI Jiaming;CHEN Tiankuo(College of Civil Engineering and Architecture,Hebei University,Baoding 071000,China)

机构地区：[1]河北大学建筑工程学院,河北保定071000

出　　处：《科技创新与生产力》2023年第5期124-127,共4页Sci-tech Innovation and Productivity

基　　金：河北大学2020年实验室开放项目(SY202060)。

摘　　要：本文采用位移控制及应力控制两种方法,分别对低碳钢试件和铸铁试件进行了拉伸试验,分析比较了加载速率和加载方法对两种材料的部分力学性能的影响,结果表明,随着位移速率和应力速率的增加,低碳钢的弹性模量、下屈服强度、抗拉强度、断后伸长率以及铸铁的抗拉强度分别呈现一定的规律性,但低碳钢的截面收缩率无明显影响。This paper uses two methods,displacement control and stress control,to conduct tensile tests on low-carbon steel specimens and cast iron specimens,and analyzes and compares the effects of loading rate and loading method on some mechanical properties of the two materials.The results show that with the increase of displacement rate and stress rate,the elastic modulus,lower yield strength,tensile strength,elongation after fracture of low-carbon steel and the tensile strength of cast iron exhibit certain regularity,but the cross-sectional shrinkage of low-carbon steel has no significant effect.

关 键 词：拉伸试验 位移控制 应力控制 曲线形状 力学性能 

分 类 号：TG155.52[金属学及工艺—热处理]