热轧碳素钢板断后伸长率与试样尺寸的关系  

Relationship between Percentage Elongation after Fracture and Specimen Size of Hot Rolled Carbon Steel Plate

作　　者：郭卫民[1] 刘成宝[2] 李永德[1] 徐娜[1] 时军波[1] 

机构地区：[1]山东省科学院山东省材料失效分析与安全评估工程技术研究中心,济南250014 [2]莱芜钢铁集团有限公司技术研发中心,莱芜271100

出　　处：《机械工程材料》2014年第2期11-14,101,共5页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(51101094);山东省科学院科技发展基金资助项目(科基合字2011第4号)

摘　　要：通过拉伸试验研究了两种不同厚度碳素钢钢板的断后伸长率与试样尺寸的关系。结果表明:断后伸长率与试样尺寸的关系符合Oliver公式,通过线性拟合得到了两种钢板的Oliver表达式,并通过断后伸长率的换算验证了Oliver表达式的合理性。The relationship between percentage elongation after fracture and specimen size of two kinds of carbon steel plates in different thicknesses was investigated in tensile tests. The results show that the relationship between percentage elongation after fracture and specimen size was in accordance with Oliver formula. The Oliver expressions of two steel plates were obtained by linear fitting, and the rationality of the fitted expressions was certified by conversion of percentage elongation after fracture.

关 键 词：断后伸长率 Oliver公式 应变硬化指数 

分 类 号：TG142.1[一般工业技术—材料科学与工程]