锰原料对低合金TRIP钢中非金属夹杂物的影响

doi:10.13228/j.boyuan.issn0449-749x.20210276

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摘要为了研究不同锰合金原料对TRIP钢洁净度的影响及锰合金中非金属夹杂物的遗传特性,采用SEM-EDS分别检测了电解锰、金属锰和中碳锰铁中非金属夹杂物的类型、形貌和尺寸,并通过高温试验和热力学计算系统探讨了采用3种锰原料进行合金化后TRIP钢中非金属夹杂物特征。结果表明,电解锰中夹杂物主要为MnC、MnC-MnO和MnO-MnS以及微量MnO,金属锰中夹杂物为球形的纯MnO、纯MnS和MnO-MnS复合夹杂,中碳锰铁中夹杂物主要为MnO-SiO₂和MnO-SiO₂-MnS复合夹杂,也发现微量MnC颗粒和残余元素富集相;冶炼过程先加入铝、硅后,钢中夹杂物为Al₂O₃,未发现AlN和含硅夹杂物,而加入锰原料后,钢中夹杂物演变为单一Al₂O₃、MnS、AlN夹杂以及Al₂O₃-MnS和Al₂O₃-AlN复合夹杂;对TRIP钢而言,采用电解锰、金属锰和中碳锰铁进行合金化后,钢中非金属夹杂物类型差别不大;由于TRIP钢的高铝特性,锰合金中MnC和MnS夹杂物在钢液中分解,MnO和SiO₂夹杂物在冶炼过程中被铝还原为Al₂O₃夹杂,锰硅氧化物夹杂的演变路线为MnO/MnO-SiO₂→Al₂O₃→MnS/Al₂O₃-MnS。由于铝、氮、锰和硫在凝固前沿的偏析和富集,TRIP钢凝固过程中分别析出纯AlN夹杂和纯MnS夹杂,或以异质形核的形式生成Al₂O₃-MnS和Al₂O₃-AlN复合夹杂。此外,由于锰合金中含有一定氮元素且锰可增加钢液中氮的固溶度,添加锰原料会促进AlN夹杂的形成。

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	朱航宇
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	宋明明
	薛正良

关键词 ： TRIP钢, 夹杂物, 高铝钢, 电解锰, 金属锰, 锰合金

Abstract：To clarify the effects of manganese materials on the cleanness of TRIP steel and the hereditary character from manganese alloys to steels, the type, morphology, and size of non-metallic inclusions (NMI) were detected using SEM-EDS. Then, the NMI characteristics in TRIP steel were systematically discussed based on high-temperature experiments and thermodynamic calculations. The results show that, the main inclusions in electrolytic manganese were MnC, MnC-MnO, MnO-MnS and trace MnO, the main inclusions in manganese metal were single MnO, single MnS and complex MnO-MnS, and the medium carbon ferromanganese mostly contained complex MnO-SiO₂ and MnO-SiO₂-MnS inclusions, the trace MnC particles and enrichment phases of residual elements were also detected. During alloying process, the dominant NMI was Al₂O₃ after the addition of Al and Si, and then the NMIs were changed to Al₂O₃, MnS, AlN, Al₂O₃-MnS and Al₂O₃-AlN after manganese addition after Mn alloying. For TRIP steel, after alloying with electrolytic manganese, manganese metal and medium carbon ferromanganese, there was little difference in the types of NMIs in the steel. Due to the high-Al characteristic in molten steel, the MnC and MnS inclusions from manganese materials were dissolved to molten steel, and then the MnO and SiO₂ inclusions were reduced to Al₂O₃. The evolution route of manganese and silicon oxides during the smelting process was MnO/MnO-SiO₂→Al₂O₃→MnS/Al₂O₃-MnS. During the solidification, pure AlN and MnS inclusions precipitated or Al₂O₃-MnS and Al₂O₃-AlN complex inclusions were formed, due to the enrichment and segregation of Al, N, Mn and S elements. Moreover, the addition of manganese materials may promote the formation of AlN inclusion, the possible explanation was that manganese materials contained N element or Mn increased the solubility of N element.

Key words： TRIP steel inclusion high Al steel electrolytic manganese manganese metal manganese alloy

收稿日期: 2021-05-10

引用本文:

朱航宇, 王伟胜, 赵吉轩, 李建立, 宋明明, 薛正良. 锰原料对低合金TRIP钢中非金属夹杂物的影响[J]. 钢铁, 2022, 57(1): 66-73. ZHU Hang-yu, WANG Wei-sheng, ZHAO Ji-xuan, LI Jian-li, SONG Ming-ming, XUE Zheng-liang. Effect of manganese raw materials on non-metallic inclusions in low alloy TRIP steel[J]. Iron and Steel, 2022, 57(1): 66-73.

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[1] 王存宇,杨洁,常颖,等. 先进高强度汽车钢的发展趋势与挑战[J]. 钢铁,2019,54(2):1. (WANG Cun-yu, YANG Jie, CHANG Ying, et al. Development trend and challenge of advanced high strength automobile steels[J]. Iron and Steel,2019,54(2):1.)
[2] 王晓晖,康健,李振垒,等. 等温时间对低硅含铝热轧TRIP钢组织性能的影响[J]. 钢铁,2019,54(5):54. (WANG Xiao-hui,KANG Jian,LI Zhen-lei,et al. Effect of isothermal time on microstructures and mechanical properties in hot rolled TRIP steels with low Si and more Al[J]. Iron and Steel,2019,54(5):54.)
[3] 王伟胜,朱航宇,宋明明,等. Fe-23Mn-xAl-0.7C低密度钢中非金属夹杂物形成机理[J]. 钢铁, 2020, 55(10): 29. (WANG Wei-sheng, ZHU Hang-yu, SONG Ming-ming, et al. Formation mechanism of non-metallic inclusions in Fe-23Mn-xAl-0.7C lightweight steels[J]. Iron and Steel, 2020, 55(10): 29.)
[4] 邵成伟,王俊涛,赵晓丽,等. 两相区退火处理含铝中锰钢的组织和力学性能[J]. 钢铁,2020,55(5):87. (SHAO Cheng-wei,WANG Jun-tao,ZHAO Xiao-li,et al. Microstructure and mechanical properties of intercritically annealed Al-contain medium Mn steel[J]. Iron and Steel,2020,55(5):87.)
[5] Elliott R,Coley K,Mostaghel S,et al. Review of manganese processing for production of TRIP/TWIP steels, Part 1: Current practice and processing fundamentals[J]. JOM,2018,70(5):680.
[6] Pande M M,Guo M,Guo X,et al. Ferroalloy quality and steel cleanliness[J]. Ironmaking and Steelmaking,2010,37(7):502.
[7] Pande M M,Guo M,Devisscher S,et al. Influence of ferroalloy impurities and ferroalloy addition sequence on ultra low carbon (ULC) steel cleanliness after RH treatment[J]. Ironmaking and Steelmaking,2012,39(7):519.
[8] Bi Y,Karasev A,Jönsson P G. Investigations of inclusions in ferrochromium alloys[J]. Ironmaking and Steelmaking,2014,41(10):756.
[9] Wijk O,Brabie V. The purity of ferrosilicon and its influence on inclusion cleanliness of steel[J]. ISIJ International,1996,36(s):132.
[10] 张宏艳, 田志红, 邵肖静,等. 改质工艺对高强度低合金钢夹杂物特性的影响[J]. 中国冶金, 2021, 31(2): 31. (ZHANG Hong-yan, TIAN Zhi-hong, SHAO Xiao-jing, et al. Influence of modification processes on inclusion properties of high strength low alloy steel[J]. China Metallurgy, 2021, 31(2): 31.)
[11] Sjöqvist T,Jönsson P,Grong Ö. Inclusions in commercial low and medium carbon ferromanganese[J]. Metallurgical and Materials Transactions A,2001,32(5):1049.
[12] Sjökvist T,Göransson M,Jönsson P,et al. Influence of ferromanganese additions on microalloyed engineering steel[J]. Ironmaking and steelmaking,2003,30(1):73.
[13] Sharapova V V. Titanium-bearing nonmetallic inclusions in manganese ferroalloys[J]. Steel in Translation,2010,40(12):1092.
[14] 郭东海,储少军. 锰系铁合金对钢铁的影响及其纯净化[J]. 铁合金,2012(2):9.(GUO Dong-hai,CHU Shao-jun. Infuence of manganese ferroalloys on iron and steel industry and its purification of China[J]. Ferro-Alloys,2012(2):9.)
[15] Yuki N,Shibata H,Emi T. Solubility of MnS in Fe-Ni alloys as determined by in-situ observation of precipitation of MnS with a confocal scanning laser microscope[J]. ISIJ International,1998,38(4):317.
[16] 邓志银,戈文英,胡博文,等. 合金化对铝镇静钢中夹杂物的影响[J]. 钢铁,2019,54(10):30.(DENG Zhi-yin,GE Wen-ying,HU Bo-wen,et al. Effect of alloying on inclusions in Al-killed steel by a ferrochromium alloy[J]. Iron and Steel,2019,54(10):30.)
[17] Paek M K,Jang J M,Do K H,et al. Nitrogen solubility in high manganese-aluminum alloyed liquid steels[J]. Metals and Materials International,2013,19(5):1077.
[18] 李小明,席浩栋,缪德军,等. 炼钢流程钢中氮的溶解及控制技术[J]. 钢铁,2021,56(10):36.(LI Xiao-ming, XI Hao-dong, MIAO De-jun, et al. Nitrogen dissolution and control of molten steel in steelmaking process[J]. Iron and Steel, 2021, 56(10): 36.)
[19] 贾毅,刘春阳,韩少伟,等. 铝镇静钢氮含量控制分析[J]. 中国冶金,2021,31(3):116.(JIA Yi, LIU Chun-yang, HAN Shao-wei, et al. Analysis of nitrogen content control in Al-killed steel[J]. China Metallurgy, 2021, 31(3): 116.)
[20] 胡晓光. RH精炼过程增氮行为探讨[J]. 中国冶金,2018,28(4):45.(HU Xiao-guang. Discussion on nitrogen increasing behavior in RH refining process[J]. China Metallurgy, 2018, 28(4): 45.)