摘要
为进一步优化Ti-Mg-Ca脱氧体系氧化物冶金生产工艺,提高产品质量,在各工序节点取样,运用扫描电镜、光学显微镜、Gleeble-3800型动态热模拟试验机对全流程夹杂物成分、数量、尺寸和最终氧化物冶金效果进行了分析。夹杂物类型先从硅锰氧化物转变为含钛的镁铝尖晶石,然后再转变为铝钛钙氧化物为主的复合夹杂物。LF和RH脱气循环过程夹杂物去除和细化作用明显。最终轧板150 kJ/cm和200 kJ/cm线能量焊接热影响区-40℃冲击功分别为216 J和208 J,其焊接热影响区组织主要为针状铁素体和晶界铁素体。
In order to further optimize the oxide metallurgy production process with Ti-Mg-Ca deoxidization and improve product quality,samples were taken at each process node,and the composition,quantity,size and final effect of oxide metallurgy were analyzed by SEM,OM and Gleeble-3800dynamic thermal simulation test machine.The type of inclusions was changed from silicon manganese oxide to magnesium aluminum spinel containing titanium,and then to composite inclusions dominated by aluminum titanium calcium oxide.LF and the degassing process of RH had obvious effects of inclusion removal and refinement.Impact work at -40℃ of heat affected zone after 150kJ/cm and 200kJ/cm welding simulation respectively were 216J and 208J.The microstructure of the heat affected zone was mainly acicular ferrite and grain boundary ferrite.
作者
李超
李建新
董廷亮
吝章国
李玉谦
刘洪波
LI Chao;LI Jianxin;DONG Tingliang;LIN Zhangguo;LI Yuqian;LIU Hongbo(HBIS Group Technology Research Institute,Shijiazhuang 050023,China;HBIS Group Hansteel Company,Handan 056015,China)
出处
《炼钢》
CAS
北大核心
2018年第6期64-68,共5页
Steelmaking
基金
国家重点研发计划资助项目(2016YFB0300602)
河北省重点研发计划项目(17211017D)
关键词
氧化物冶金
夹杂物
热影响区
针状铁素体
oxide metallurgy
inclusions
heat affected zone
acicular ferrite
