高强度大梁钢冲压开裂原因分析  

Analysis of Stamping Cracking Causes of High Strength Beam Steel

作　　者：董苗翠 DONG Miaocui(Shandong Iron and Steel Group Rizhao Co.,Ltd.,Rizhao 276800,China)

机构地区：[1]山东钢铁集团日照有限公司,山东日照276800

出　　处：《山东冶金》2024年第2期36-38,共3页Shandong Metallurgy

摘　　要：国内某汽车配件制造厂在生产重型卡车横梁时出现冲压开裂问题。通过对大梁钢的化学成分、力学性能、金相组织、断口形貌和夹杂物进行综合分析,结果表明:钢中存在数量较多的大尺寸TiN夹杂物割裂了钢的铁素体基体,破坏了基体组织的连续性和变形的一致性,容易形成裂纹源,而氧化铝夹杂物会促进裂纹扩展,最终导致钢板冲压开裂。The problem of stamping cracking occurred in the production of heavy truck beam in a domestic auto parts factory.Through the comprehensive analysis of the chemical composition,mechanical properties,metallographic structure,fracture morphology and inclusions of beam steel,the results show that:a large number of TiN inclusions in the steel cracks the ferritic matrix of the steel,destroys the continuity of the matrix structure and the consistency of deformation,and is easy to form a crack source,while the alumina inclusions will promote the crack expansion,and eventually lead to the steel plate stamping cracking.

关 键 词：高强度大梁钢 夹杂物 冲压开裂 

分 类 号：TG142.1[一般工业技术—材料科学与工程]