高强度船板钢钙处理热力学计算分析-夹杂物变质研究和应用

特殊钢 ›› 2017, Vol. 38 ›› Issue (3): 23-27.

高强度船板钢钙处理热力学计算分析-夹杂物变质研究和应用

贺道中¹，周宇涛²

1湖南工业大学冶金与材料工程学院，株洲412007 ；
2北京科技大学冶金与生态工程学院，北京100083

收稿日期:2016-12-28 出版日期:2017-06-01 发布日期:2022-07-19
作者简介:贺道中(1967-),男，硕士(2007年武汉科技大学)，教授,1991年重庆大学(本科)毕业,洁净钢冶炼理论和新工艺研究。

Study and Application on Thermodynamic Calculated Analysis of Calcium Treatment and Modification of Inclusions in High Strength Ship Plate Steel

He Daozhong¹，Zhou Yutao²

1 School of Metallurgy and Materials Engineering, Hunan University of Technology, Zhuzhou 412007 ；
2 School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing 100083

Received:2016-12-28 Published:2017-06-01 Online:2022-07-19

摘要/Abstract

摘要： 通过钙处理过程中Fe-Al-Ca-O-S体系的热力学平衡计算,得出在1873 K时各种平衡态下的[Al]-[O]、[Al]-[Ca]、[Al]-[S]平衡曲线图,并系统分析了各组元对夹杂物变质的影响。研究发现F-级高强度船板钢[Al]为0.02%~0.03%时,为保证夹杂物充分变质,钢中[O]控制在25×10^-6以下;钢液中生成12CaO·7Al₂O₃的[Ca]为15.24×10^-6~19.97×10^-6,生成3CaO·Al₂O₃的[Ca]为70.87×10^-6~92.88×10^-6;适当低的钢液温度有利于生成CaS,抑制MnS的聚集析出。120t BOF-LF-VD-板坯连铸流程生产F-级高强度船板钢DNV F40（/%:0.092C,0.41Si,1.56Mn,0.015P,0.002S,0.032Al,0.035Nb,0.035Ni,0.010Ti,0.080V）的结果表明,当LF精炼渣组成/%:24.9Al₂O₃,55.6CaO,7.7MgO,8.0SiO₂,1.24TFe,加钙前钢中铝含量0.03%,氧含量0.0010%时,每炉钢水喂纯钙线150m（0.21 kg/m）,钢中夹杂物由加钙前Al₂O₃变质为球形钙铝酸盐夹杂物。

关键词: F-级高强度船板钢DNVF40 , BOF-LF-VD-CC流程, 钙处理, 热力学计算, 夹杂物变质

Abstract: By calculation on thermodynamic equilibrium of Fe-Al-Ca-O-S system in calcium treatment process, the digrams of equilibrium curves of [ Al]-[O] , [Al]-[Ca] and [Al]-[S] in each equilibrium condition at 1873K are obtained ,and the effect of each component on modification of inclusions is systematically analyzed. It is found by study that in condition of 0.02%~0. 03% [Al] in F-grade high strength ship plate steel, in order to insure full accomplishing modification of inclusions, the [O] in steel should control less than 25X10^-6; with forming 12CaO·7Al₂O₃ in liquid the [Ca] is 15.24x10-⁶~19.97x10-⁶, and with forming 3CaO·Al₂O₃ in liquid the [Ca] is 70.87x10^-6~ 92.88x10^-6； and with lower temperature of liquid it is available to form CaS and inhibit MnS clustered precipitation. The results of commercial production of F-grade high strength ship plate steel DNV F40 (/%: 0.092C, 0.41Si, 1.56Mn, 0.015P, 0.002S, 0.032Al, 0.035Nb, 0.010Ti, 0.080V) by 120t BOF-LF-VD-slab casting flowsheet show that with LF refining slag ingredient/% : 24.9Al₂O₃,55.6CaO, 7.7MgO, 8.0SiO₂ and 1.24TFe, aluminium content in steel 0.03% and oxygen content in steel 0.0010% before adding calcium, and per heat feeding pure calcium wire 150m(0.21kg/m) , the inclusions in steel modified to spheroidal calcium aluminate inclusions from Al₂O₃ before adding calcium.

贺道中, 周宇涛. 高强度船板钢钙处理热力学计算分析-夹杂物变质研究和应用[J]. 特殊钢, 2017, 38(3): 23-27.

He Daozhong, Zhou Yutao. Study and Application on Thermodynamic Calculated Analysis of Calcium Treatment and Modification of Inclusions in High Strength Ship Plate Steel[J]. Special Steel, 2017, 38(3): 23-27.

[1]	陈军, 彭光健, 林丹, 黄振华. 150 mm×150 mm小方坯超低碳钢H1T生产实践[J]. 特殊钢, 2024, 45(6): 17-22.
[2]	郑安民, 樊轩宇, 黄增鑫, 毛旺旺, 于彦冲, 张金玲, 王社斌. 稀土Ce对20MnTiB冷镦钢中夹杂物演变的影响[J]. 特殊钢, 2024, 45(6): 37-47.
[3]	任吉, 燕云, 田家龙, 王礼超, 蒋成钢, 王琳, 姜周华. La处理对H13热作模具钢中夹杂物的影响[J]. 特殊钢, 2024, 45(4): 117-123.
[4]	徐太旭, 何志军, 杨鑫, 乔西亚, 黄育飞. Si对铸态高碳铬轴承钢中渗碳体类型转变的影响机理[J]. 特殊钢, 2024, 45(3): 15-21.
[5]	孙文强, 周珠, 徐阿敏, 王哨兵, 苏诚, 沈强. 热处理工艺对高铬低活化铁素体-马氏体钢力学性能的影响[J]. 特殊钢, 2024, 45(2): 105-111.
[6]	吴翔宇, 董丙成, 王梓菲, 田钱仁, 付建勋. La-Ce对GCr15轴承钢中夹杂物的改质效果及机理[J]. 特殊钢, 2024, 45(2): 39-45.
[7]	王旭冀, 潘锡泉, 杨庚朝, 黄振华. 不同碱度渣对42CrMoS4钢中硫化物的影响[J]. 特殊钢, 2024, 45(2): 56-60.
[8]	张新文, 俞杰, 轩康乐, 印卫, 施嘉凯, 陈凯. 管线钢X65连铸过程絮流原因分析[J]. 特殊钢, 2024, 45(1): 65-69.
[9]	苏学虎. 铸造镍基合金CW12MW与CW6MC平衡凝固及析出热力学模拟[J]. 特殊钢, 2023, 44(6): 31-38.
[10]	蒋栋初, 刘从德, 印传磊. 09CuPCrNi耐候钢生产工艺研究[J]. 特殊钢, 2023, 44(6): 8-11.
[11]	王伟健, 杨文, 任英, 张立峰. 精准钙处理指导软件开发及在特殊钢生产中的应用[J]. 特殊钢, 2023, 44(6): 25-30.
[12]	苏学虎. 铸造双相不锈钢CD3MWCuN凝固与析出热力学模拟[J]. 特殊钢, 2023, 44(4): 28-34.
[13]	张威, 王旗, 王丽君, 李建民. S31254超级奥氏体不锈钢凝固相转变的热力学分析[J]. 特殊钢, 2023, 44(4): 8-14.
[14]	张保忠, 孙国敏, 李志伟, 彭勇生, 刘万善, 朱施利. 65Mn钢LF精炼渣系优化及工业试验[J]. 特殊钢, 2023, 44(4): 65-69.
[15]	李健, 凌海涛, 柴锋, 罗小兵, 常立忠. 电渣重熔过程中渣系对NiCrMoV合金钢电渣锭洁净度的影响[J]. 特殊钢, 2023, 44(4): 35-42.