无缝钢管淬火裂纹产生原因及预防措施  

Analysis of Reasons for Quench-caused Crack of Seamless Steel Tube and Releva nt Preve ntive Actions

作　　者：黄蓓蓓 侯强 扈立 HUANG Beibei;HOU Qiang;HU Li(Tianjin Pipe Corporation,Tianjin 300301,China)

机构地区：[1]天津钢管制造有限公司,天津300301

出　　处：《钢管》2020年第4期56-59,共4页Steel Pipe

摘　　要：根据无缝钢管制造工艺特点,结合宏观形貌及显微组织分析,认为无缝钢管淬火裂纹产生的原因主要为表面缺陷、应力开裂和表面增碳。分析不同淬火裂纹的形成机理,并提出相应的预防措施。分析认为:提高毛管表面质量,优化淬火工艺参数,提高钢坯成分均匀性等,可以有效减少无缝钢管淬火裂纹的产生。Based on the characteristics of the manufacturing process for the seamless steel tube,the major reasons for the quench-caused crack of the tube is identified via analysis of both the macro-morpjhology and the microstructure of the tube,i.e.,the surface defect,the stress-induced cracking,and surface carbon pick-up.And the development mechanism for different quench-caused cracks are analyzed,and accordingly the preventive action are proposed.The analysis also leads to such a conclusion that the occurrence rate of the quench-caused crack of the seamless steel tube is expected to be remarkably reduced by means of improving the as-rolled tube surface quality,optimizing the quenching process parameters,and enhancing the homogeneity of the billet,etc.

关 键 词：无缝钢管 淬火裂纹 缺陷 应力 增碳 

分 类 号：TG156.35[金属学及工艺—热处理]