20Mn2无缝钢管角部裂纹质量分析与对策

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英文篇名：Quality Analysis and Countermeasures on Corner Cracks of 20Mn2 Seamless Steel Tube 作者：丰小冬 ; 贺景春 ; 井溢农 英文作者：FENG Xiao-dong;HE Jing-chun;JING Yi-nong;Technical Center of Steel Union Co.Ltd.of Baotou Steel(Group) Corp.; 关键词：无缝钢管 ; 推方 ; 裂纹 ; 非金属夹杂物 英文关键词：seamless steel tube;;thrusting block;;cracks;;nonmetallic inclusion 中文刊名：BGKJ 英文刊名：Science & Technology of Baotou Steel 机构：内蒙古包钢钢联股份有限公司技术中心; 出版日期：2017-06-25 出版单位：包钢科技 年：2017 期：v.43;No.183 语种：中文; 页：BGKJ201703015 页数：4 CN：03 ISSN：15-1210/TF 分类号：46-49

摘要

20Mn2无缝钢管在推方过程中,角部出现细微裂纹,对管体进行了化学成分及热酸低倍检验,利用金相显微镜和扫描电镜对其进行微观分析。分析表明,非金属夹杂物是引起裂纹的主要原因,并对夹杂物做定性分析,找出其来源,并提出相应的改进措施。
        In the thrusting block process of 20Mn2 seamless steel tube,there are fine cracks in the corner.The tube is inspected through chemical composition test and macroscopic examination of hot acid etching,the micro structure is analyzed by means of metallographic microscope and scanning electron microscope.The analysis shows that the nonmetallic inclusions are the main cause of cracks,and the qualitative analysis of the inclusions is made to find out the source and to put forward the corresponding improvement measures.

引文

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