022Cr19Ni10N不锈钢管爆破开裂原因分析及工艺改进  

Cause Analysis of Blast-cracking of 022Cr19Ni10N Stainless Steel Pipe and Relevant Process Improvement

作　　者：阚磊 王春奕 徐鸿昊 欧红燕 张全新 KAN Lei;WANG Chunyi;XU Honghao;OU Hongyan;ZHANG Quanxin(The Sixth Army Representative Office(Chongqing)of Army Equipment Department,Chongqing 400010,China;BAOWU Special Metallurgy Aeronautical Research Technology Co.,Ltd.,Chongqing 400084,China)

机构地区：[1]陆装驻重庆地区第六军代室,重庆400010 [2]宝武特冶航研科技有限公司,重庆400084

出　　处：《钢管》2024年第6期55-59,共5页Steel Pipe

摘　　要：通过对022Cr19Ni10N不锈钢管的理化性能和工艺性能进行试验,结合钢管生产工艺过程以及液压受力状况分析了钢管爆破开裂原因,并针对原因提出了工艺改进措施。分析结果表明,钢管纵向强度处于标准值范围下限边缘时存在爆破开裂的可能性,而钢管中较多的链状氮化钛夹杂以及内壁存在的纵向发纹缺陷更使得钢管环向强度大大降低,是导致钢管液压未达到规定压力值就发生爆破开裂的主要原因。一方面可通过细化晶粒提高成品钢管的力学性能以降低钢管爆破开裂的可能性;另一方面可提高钢坯冶金质量,控制钢中链状氮化钛夹杂含量和级别,减少钢管内壁的发纹缺陷,以提高环向力学性能,避免钢管在液压爆破试验时发生开裂。The causes for the blast cracking of the 022Cr19Ni10N stainless steel pipe are analyzed by means of phy-sical and chemical tests,and tests to its technological performance,and taking the technological process and the hydraulic loading status into consideration,based on which relevant process improvement measures are proposed.The results indicate that the longitudinal strength of the steel pipe is at the lower limit of the standard value,and there is a possibility of occurrence of the blast cracking,and in addition,so much chain like titanium nitride inclusion,and longitudinal hair cracks on the inner surface of the steel pipe get the circumferential strength of the steel pipe further reduced,which is mainly leads to the blast cracking of the steel pipe before the hydraulic pressure is not yet up to the specified value.Accor-dingly refining the grain size can improve the mechanical properties of the steel pipe and reduce the possibility of the blast cracking,on the other hand,measures such as improving the metallurgical quality of the steel billet,controlling the content and level of chain like titanium nitride inclusion in the steel,reducing the hair crack on the inner surface of the steel pipe,and improving the circumferential mechanical properties should be taken to avoid cracking of the said steel pipe during the hydraulic blasting test.

关 键 词：不锈钢管 022Cr19Ni10N 氮化钛夹杂 发纹 液压爆破 

分 类 号：TG142.71[一般工业技术—材料科学与工程]