Q460C钢板力学性能不合格原因分析  

Cause Analysis of Unqualified Mechanical Properties of Q460C Steel Plates

作　　者：孙胜英[1] 张志杰[1] 靳芳芳[1] 张海旺[1] 

机构地区：[1]邯郸钢铁集团有限责任公司技术中心,邯郸056015

出　　处：《理化检验（物理分册）》2011年第2期120-122,共3页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：利用光学显微镜和扫描电子显微镜分析了某厂生产的多个批次Q460C钢板力学性能低于GB/T 1591-2008技术要求的原因。结果表明:钢板中心偏析造成的贝氏体组织、微裂纹、MnS以及铌和钛复合夹杂物的存在是导致该Q460C钢板力学性能不合格的主要原因;另轧制工艺控制不当造成的魏氏体组织也会降低钢板的力学性能。Reasons of mechanical properties of multiple hatches of Q460C steel plates produced by a steel plant lower than the requirement of GB/T 1591 -- 2008 were analyzed through optical microscope and scanning electron microscope. The results show that the bainite structure, tiny cracks and MnS inclusions as well as Nh and Ti compound inclusions caused by center segregation were the main reasons for the unqualified mechanical properties of Q460C steel plates. And widmanstatten structure caused by improper rolling technics also lowered the mechanical properties of the Q460C steel plates.

关 键 词：Q460C钢板 力学性能 贝氏体组织 魏氏组织 夹杂物 微裂纹 

分 类 号：TG335[金属学及工艺—金属压力加工]