SURFACE ROUGHNESS EVOLUTION AND FORMABILITY OF INTERSTITIAL FREE SHEET STEEL TO GRAIN SIZE AND SHEET THICKNESS  

晶粒尺寸和板厚对无间隙原子钢表面粗糙度和成形性的综合影响(英文)

作　　者：高霖[1] 童国权[1] 郭勇[1] 

机构地区：[1]南京航空航天大学机电工程学院,南京210016

出　　处：《Transactions of Nanjing University of Aeronautics and Astronautics》1999年第2期200-203,共4页南京航空航天大学学报（英文版）

摘　　要：Experimental study has been conducted for an interstitial free(IF) sheet steel on its surface roughness evolution and formability with respect to grain size and sheet thickness effect. The surface roughness of IF sheet steel is proportional to effective strain, grain size and inversely proportional to sheet thickness; the larger grain reduces the formability by accelerating the surface roughening rate and enhance formability by raising the workhardening rate, while the latter effect plays the dominate role. The grain size effect on surface roughening and formability is more obvious when the sheets are thinner.研究了晶粒尺寸和板料厚度对无间隙原子钢板表面粗糙度和单拉成形性能的综合影响,发现IF钢在变形时表面粗糙度的演化与晶粒尺寸和等效应变成正比,与板厚成反比;晶粒尺寸的增加对成形性有着双重影响:一方面它通过增加变形过程中表面粗糙化速率来降低成形性,另一方面又通过提高加工硬化指数来增加抵抗变形失稳的能力,但后者作用占主导地位。在板厚较小时。

关 键 词：surface roughness PLASTICITY grain size FORMABILITY 

分 类 号：V252[一般工业技术—材料科学与工程]