Ti处理工艺对钢中夹杂物的影响  

Effect of Ti treatment process on inclusions in steel

作　　者：肖爱达[1] 郑庆 梁亮[1] 周剑丰[1] 谢世正[1] 王勃 张波 刘春泉 Xiao Aida;Zheng Qing;Liang Liang;Zhou Jianfeng;Xie Shizheng;Wang Bo;Zhang Bo;Liu Chunquan(Hunan Valin Lianyuan Iron and Steel Co.,Ltd.,Loudi 417000,Hunan,China;School of Metallurgy and Material Engineering,Hunan University of Technology,Zhuzhou 412007,Hunan,China)

机构地区：[1]湖南华菱涟源钢铁有限公司,湖南娄底417000 [2]湖南工业大学冶金与材料工程学院,湖南株洲412007

出　　处：《钢铁钒钛》2022年第1期158-164,共7页Iron Steel Vanadium Titanium

基　　金：湖南省科技创新计划项目(No.2018XK2301);湖南省自然科学基金项目(No.2019JJ60062)。

摘　　要：采用模拟计算和试验相结合的方式研究了加Ti处理对钢中夹杂物的影响,探明了含Ti氧化物夹杂物的形成条件及演变过程。研究结果表明:在1600℃温度下,当钢中[O]含量大于22×10^(-6)时,才会生成含Ti氧化物夹杂物。同时,由于钢中[Als]的存在会抑制含Ti氧化物夹杂的生成,要求在冶炼过程中尽可能避免采用金属Al进行脱氧处理;当Ti处理前钢中[O]含量在80×10^(-6)以内时,随着[O]含量的增加,夹杂物尺寸未见明显变化;在Ti处理结束后加入Ca粒可对夹杂物进行改性处理,促使MnS在夹杂物上形核,从而有利于促进晶内针状铁素体的形成。In this work,the influence of Ti treatment on inclusions in steel and the formation conditions and evolution process of Ti oxide inclusions were studied by a combination of simulation calculation and experiment.The results show that at 1600℃,when the content of[O]in steel is greater than 22×10^(-6),Ti oxide inclusions will be formed.At the same time,since the presence of[Als]in the steel will inhibit the formation of Ti-containing oxide inclusions,it is required to avoid the use of metallic Al for deoxidation treatment as much as possible during the smelting process.When the[O]content in the steel before Ti treatment is less than 80×10^(-6),with the increase of[O]content,the size of the inclusions changes slightly.The addition of Ca particles after the Ti treatment can modify the inclusions and promote the nucleation of MnS on the inclusions,which is beneficial to promote the formation of intragranular acicular ferrite.

关 键 词：耐磨钢 Ti处理 氧化物冶金 夹杂物 晶内针状铁素体 

分 类 号：TF823[冶金工程—有色金属冶金]