金属板材成形性能的力学分析  

Mechanical Analysis of Metal Sheet's Forming Property

作　　者：魏毅静[1] 方健[1] 陈卓人[1] 王承忠[1] 

机构地区：[1]宝钢股份公司技术中心,上海201900

出　　处：《宝钢技术》2004年第B05期44-46,共3页Baosteel Technology

摘　　要：根据金属材料拉伸试验所获得的强度、塑性指标、成形性能如Rp0.2、R m、A、n、r等,并结合成形极限图(FLD)试验实测的金属板材拉胀成形性能,介绍了一整套用于评价金属板材塑性成形性能的实验室分析技术。文章以两种厚薄规格的冷轧板材为例,根据拉伸应变硬化指数动态跟踪技术实测的n值随应变量变化的趋势,揭示了上述两种材料拉伸性能与成形性能异同特点的力学本质。On the basis of strength and plastic indexes and forming properties, such as Rp0.2,Rm,A, n, r from the tensile tests, in combination with the evaluation of forming properties under the tension or inflation loading conditions given by the forming limit diagram(FLD) ,a set of integrated laboratory techniques for analysis of forming property of metal sheets was introduced in the paper. As a typical example, two pieces of steel sheet with different thickness (One is thick, the other is thin) were carefully studied on the basis of the tendency of n value variable with the strain capacity measured with dynamic monitoring technique, which revealed the mechanical correlation between the tensile and forming properties of the two pieces of steel sheet mentioned above.

关 键 词：拉伸试验 成形极限图 n值 r值 

分 类 号：TG113.25[金属学及工艺—物理冶金]