高强抗氢致裂纹X65管线钢管生产实践  

Production Practice of Hydrogen-induced Cracking Resistant High-strength X65 Pipeline Steel

作　　者：王建[1] 成海涛 陈永[1] 曾建华[1] 易良刚 周永健 陈炼[1] 黄生权 余海滨 陈昆 

机构地区：[1]攀钢集团研究院有限公司,四川攀枝花617000 [2]攀钢集团成都钢钒有限公司,四川成都610303

出　　处：《钢铁钒钛》2013年第1期41-48,共8页Iron Steel Vanadium Titanium

摘　　要：通过转炉双渣法脱磷、转炉出钢过程钢包渣改性、中间包使用双层高碱度覆盖剂、LF炉炉渣组成控制、密封圈Ar保护浇铸等技术的实施,在入转炉铁水[S]平均0.033%(范围0.028%～0.039%)、[P]平均0.133%(范围0.129%～0.138%)条件下,成功试制X65管线钢管。铸坯平均[N]0.003 5%,T[O]0.001 4%,[S]0.002 3%,[P]0.009 8%,夹杂物评级0.5级以内,铸坯夹杂物总量为0.004 4%,钢中夹杂物呈球状分布,尺寸小,数量少。铸坯内部质量达到了较好控制水平。试制钢管的力学性能均达到预期效果,完全满足标准要求和用户需求。With average [S] of 0. 033% （in the range of 0. 028% -0.039% ）, and average [P] of 0. 133% （in the range of 0. 129% -0. 138% ） in molten iron to be fed into converter, X65 pipeline steel was successfully produced through dephosphorization by double slag process in converter, modifica- tion of ladle slag during tapping, application of double-deck high alkalinity covering agent in tundish, control of LF slag composition, and casting protection with argon. The average [ N ], T [ O ], [ S ] and [ P] in the strands were controlled at 0.0035%, 0.001 4%, 0.002 3%, and 0. 009 8% respectively. Inclusions in the strand were rated below 0. 5 with total amounts of 0. 004 4%. These globular inclusions were small in size and number, exhibiting satisfied internal quality. The mechanical properties of the trial- produced steel achieved the desired effect, and could fully meet the requirements of standards and users.

关 键 词：X65管线钢 转炉 双渣法脱磷 夹杂物控制 力学性能 

分 类 号：TG335.7[金属学及工艺—金属压力加工]