800 MPa汽车大梁钢剪切开裂的分析探讨  

ANALYSIS ON SHEAR CRACKING OF 800 MPa AUTOMOBILE GIRDER STEEL

作　　者：邓杭州[1] 刘艳玲[1] Deng Hangzhou;Liu Yanling(Anyang Iron and Steel Stock Co.,Lt)

机构地区：[1]安阳钢铁股份有限公司

出　　处：《河南冶金》2018年第4期14-16,43,共4页Henan Metallurgy

摘　　要：对800 MPa级汽车大梁钢剪切开裂部位的钢板组织性能以及开裂的成因进行了试验与分析。结果表明:剪切面裂纹及其附近未见明显的夹杂及组织异常,其各项性能指标良好。通过对裂纹起源以及裂纹发展的影响因素的分析,提出了有利于避免剪切裂纹发生与扩展的有效措施。The microstructures and cracks cause of steel slabs of 800 MPa grade steel girder are tested and analyzed.The results show that there are no obvious inclusions and abnormalities in the cracks and cracks near the shear plane. Theinfluence factors of the crack-origin and crack-development are analyzed, the effective measures to avoid the occurrenceand propagation of shear crack is put forward.

关 键 词：裂纹 韧性 剪刃间隙 裂纹扩展 

分 类 号：TG142.15[一般工业技术—材料科学与工程]