金属板材应变硬化指数n与其屈强比的关系  

Relationship between strain hardening index(n)of metal sheet and its yield ratio

作　　者：王飞龙[1] 覃荣光 周三保 尹晶晶 靳阳 WANG Feilong;QIN Rongguang;ZHOU Sanbao;YIN Jingjing;JIN Yang(State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization PanGang Group Research Institute Co.,Ltd.,Panzhihua 617000,China;Liuzhou Wuling Automotive Co.,Ltd.,Liuzhou 545000,China;Xichang Steel and Vanadium Co.,Ltd.,PanGang Group,Xichang 615000,China)

机构地区：[1]攀钢集团研究院有限公司,钒钛资源综合利用国家重点实验室,四川攀枝花617000 [2]柳州五菱汽车工业有限公司,广西柳州545000 [3]攀钢集团西昌钢钒有限公司,四川西昌615000

出　　处：《物理测试》2023年第1期16-20,共5页Physics Examination and Testing

摘　　要：从Hollomon关系式出发,推导出了n值与屈强比之间的对应关系。根据该关系式,首先测量出某一厚度材料的n值代入该式求出材料常数C值,则该钢种其他厚度规格的材料只需测出其屈服强度Rp0.2及抗拉强度Rm即可根据公式求出n值。对典型材料n值的计算值与实验室测量值进行了对比,结果表明,所提出的n值计算方法精度较高、简洁易用,从而使确定同一钢种n值的工作大大简化,尤其便于估算实验室难以测量的超薄或超厚材料的n值。Based on the Hollomon relation,the corresponding relationship between the n value and the yield ratio was deduced.According to this formula,the value of n of one material with certain thickness was firstly measured,which was then substituted to obtain the value of material constant C.For the materials of this type of steel with other thicknesses,the measurement of yield strength Rp0.2and tensile strength Rmwas only required to calculate the value of n according to the formula.The calculation values and measurement values of n of typical material were compared.The results showed that the proposed method for the calculation of n was accurate and simple to use,which greatly simplified the work of determining the n value of the same steel type.This method was especially applicable for the estimation of n value of ultra-thin materials or ultra-thick materials,which was difficulty measured in the laboratory.

关 键 词：硬化指数 n值 屈强比 对应关系 

分 类 号：TG113[金属学及工艺—物理冶金]