铆螺钢镦裂原因分析  

Analyses of Cracking of Cold Forging Steel

作　　者：刘建勋[1] 李壮[1] 徐佩笔[2] 吴迪[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004 [2]萍乡钢铁公司,江西萍乡337019

出　　处：《机械工程材料》2006年第6期95-97,共3页Materials For Mechanical Engineering

基　　金：国家自然科学基金(50334010)

摘　　要：通过理化检测,对铆螺钢在冷镦时出现开裂的原因进行了分析。结果表明：铆螺钢冷镦中出现的开裂为塑性开裂；原料在冶炼过程中,中间包内衬出现塌落,使钢中存在较多含有氧、锰、铁、镁、铝、硫和钙等元素的层皮状夹杂物,它不同于钢中的正常夹杂物,是造成铆螺钢镦裂的根本原因。The reason of cracking for the cold forging steel was analyzed by physical and chemical tests. The fracture morphology of the cold forging steel was plastic fracture. The falling down of the liner in the tundish during smelting of the bar resulted in the presence of larger amount of complex inclusions containing dements of O, Mn, Fe, Mg, Al, S and Ca. These inclusions resulted in cracking of the cold forging steel during the cold heading process.

关 键 词：铆螺钢 冷镦 开裂 复合夹杂物 

分 类 号：TG142.41[一般工业技术—材料科学与工程]