超高强钢30CrMnSiNi2A冲击韧度试验研究  

INSTRUMENTED IMPACT PROPERTIES OF ULTRA-HIGH STRENGTH STEEL 30CrMnSiNi2A

作　　者：牛靖[1] 董俊明[1] 何源 薛锦[1] 

机构地区：[1]西安交通大学金属材料强度国家重点实验室,西安710049 [2]中船重工集团公司第十二研究所,兴平713102

出　　处：《机械强度》2006年第4期607-610,共4页Journal of Mechanical Strength

摘　　要：通过对含V型缺口试样的示波冲击试验和断口分析,研究温度对超高强钢30CrMnSiNi2A冲击韧度的影响。结果表明,实测的载荷—位移曲线上最大载荷所对应的位移随温度的降低而减小,而最大载荷随温度变化不明显;30CrMnSiNi2A的冲击韧度随温度的降低而降低,温度低于-40℃时裂纹形成功、裂纹扩展功和总功均随温度降低明显下降;随着温度的降低,断口上的空穴数量增多,体积增大,导致裂纹扩展容易,裂纹扩展功下降。By analyzing the load-displacement curve and the fracture surface of specimens, the effect of temperatures on impact toughness of ultra-high strength steel 30CrMnSiNi2A was investigated experimentally, The results show that the toughness of 30CrMn- SiNi2A and displacement at peak load decrease with the fall of test temperatures, the change of the peak load is less ; the initiation work, propagation work and damage work all decrease obviously with the fall of test temperature below - 40℃ ; the quautity and volume of void on the fracture surface increasing with the fall of temperatures result in the decreasing of the crack propagation work.

关 键 词：示波冲击试验 超高强钢 30CRMNSINI2A 

分 类 号：TB302.3[一般工业技术—材料科学与工程] TG113.25[金属学及工艺—物理冶金]