38MnVS6非调质钢中硫化物碲改质工业实践

刘增平; 李杰; 沈伟; 付建勋

doi:10.7513/j.issn.1004-7638.2023.02.029

38MnVS6非调质钢中硫化物碲改质工业实践

doi: 10.7513/j.issn.1004-7638.2023.02.029

刘增平^1,,
李杰²,
沈伟²,
付建勋^2, ,

1.
承德建龙特殊钢有限公司, 河北省半钢水冶炼高洁净高品质特殊钢重点实验室, 河北承德 067201
2.
上海大学材料科学与工程学院先进凝固技术中心, 省部共建高品质特殊钢冶金与制备国家重点实验室, 上海 200444

基金项目: 国家自然科学基金资助项目（51874195，51671124）；广东省科技专项：〔2020〕43 号

详细信息

作者简介:
刘增平，1979出生，男，工程师，研究方向为汽车用钢产品开发与质量提升，E-mail: liuzengping@ejianlong.com

通讯作者:
付建勋，1969年出生，男，博士、教授，研究方向为高品质特殊钢开发与品质提升，E-mail: fujianxun@shu.edu.cn

中图分类号: TF76
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出版历程
- 收稿日期: 2022-01-24
- 刊出日期: 2023-04-30

Industrial practice of tellurium modified sulfides in the non-quenched and tempered 38MnVS6 steels

Liu Zengping^1
,,
Li Jie²,
Shen Wei²,
Fu Jianxun^{2
, ,}

1.
Chengde Jianlong Special Steel Co., Ltd., Hebei Key Laboratory of Semi Molten Steel Smelting High Clean and High Quality Special Steel, Chengde 067201, Hebei, China
2.
Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, State Key Laboratory of Advanced Special Steel, Shanghai 200444, China

摘要

摘要: 分析了未改质和改质后的38MnVS6钢中硫化物形态及评级，研究了碲对钢中硫化物二维及三维形貌的影响；通过对成品棒材力学性能的检测分析，研究了碲对38MnVS6非调质钢力学性能的影响。结果表明：碲改质过后钢中硫化物评级从细系3.0级，粗系2.0级下降为细系2.0级，粗系1.5级，法标评级由F级改质为C级；碲改质后钢中90%左右的硫化物长宽比控制在6以内，50%以上控制在1~3，未改质钢中硫化物大多数为长条状，改质过后以断续状和椭球状为主；改质过后38MnVS6非调质钢的屈服强度、抗拉强度、断后伸长率、断面收缩率等力学性能指标均符合技术要求。
- 38MnVS6 /
- 碲改质 /
- 硫化物 /
- 力学性能
Abstract: The morphology and rating of sulfide in the unmodified and modified 38MnVS6 steels were analyzed by means of metallographic microscope, scanning electron microscope and electrolytic etching. The effect of tellurium on the two-dimensional and three-dimensional morphology of sulfides in the steels was studied. The effect of tellurium on the mechanical properties of the non-quenched and tempered 38MnVS6 steels was studied by testing and analyzing the mechanical properties of the finished bars. The results show that after tellurium modification, the sulfide rating in the steel decreases from fine system 3.0 and coarse system 2.0 to fine system 2.0 and coarse system 1.5. The standard rating is changed from F to C. The aspect ratio of about 90% sulfides in the tellurium modified steels is controlled within 6, and more than 50% is controlled between 1 and 3. Most sulfides in the unmodified steels have the appearance of long strips, which were mainly changed to intermittent and ellipsoid after modification. After modification, the yield strength, the tensile strength, the fracture elongation, the reduction of area and other mechanical properties of the non-quenched and tempered 38MnVS6 steels meet the technical requirements.
- 38MnVS6 /
- tellurium modification /
- sulfide /
- mechanical properties

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图 1 棒材实物及取样示意

Figure 1. Bar materials and sampling diagram

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图 2 未改质与改质后38MnVS6钢金相照片

(a)～(c)未改质；(d)～(f)改质

Figure 2. Metallographic photos of the non-modified and modified 38MnVS6 steel

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图 3 未改质与改质后38MnVS6钢的黑白照片

(a)～(c)未改质；(d)～(f)改质

Figure 3. Black and white photography of the non-modified and modified 38MnVS6 steel

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图 4 法标NF A-04-108夹杂物评级图谱^[15]

Figure 4. France NF A 04-108 sulfide evaluation map

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图 5 未改质与改质后38MnVS6钢SEM照片

(a) 二维，未改质；(b)二维，改质；(c)三维，未改质；(d)三维，改质

Figure 5. SEM photos of the non-modified and modified 38MnVS6 steels

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表 1 38 MnVS6非调质钢的主要化学成分

Table 1. Main chemical composition of the non-quenched and tempered 38MnVS6 steel %

C	Si	Mn	P	S	N	V	Ni	Cr
0.37	0.57	1.42	0.01	0.054	0.016	0.13	0.03	0.17

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表 2 未改质与改质后38MnVS6钢中硫化物评级结果

Table 2. Sulfide rating results in the non-modified and modified 38MnVS6 steel

	硫化物长度/μm		评级		法标评级
	细系	粗系	细系	粗系	法标评级
未改质	1084.5	578.4	3.0	2.0	F
改质	576.6	423.4	2.0	1.5	C

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表 3 含碲38MnVS6钢非调质力学性能

Table 3. Mechanical properties of tellurium containing 38MnVS6 steels without quenching and tempering

	屈服强度R_p0.2/MPa	抗拉强度R_m/MPa	断后伸长率A/%	屈强比	纵向冲击吸收能量(KU₂)/J	表面硬度（HBW）
技术要求	≥590	≥800	≥12	0.65～0.75	≥10	≤296
改质材	610	866	22	0.7	15	247～254

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参考文献(16)

[1]	董成瑞, 任海鹏, 金同哲. 微合金非调质钢[M]. 北京: 冶金工业出版社, 2000. Dong Chengrui, Ren Haipeng, Jin Tongzhe. Microalloy non-quenched and quenched steel[M]. Beijing: Metallurgical Industry Press, 2000.
[2]	Liu Ruining, Wang Fuming. Advance in microalloying non-quenched-tempered steels for auto[J]. Special Steel, 2006,27(3):5. (刘瑞宁, 王福明. 汽车用微合金化非调质钢的进展[J]. 特殊钢, 2006,27(3):5. doi: 10.3969/j.issn.1003-8620.2006.03.013
[3]	李梦龙. 易切削非调质钢中硫化物生成行为与均匀化控制研究[D]. 北京: 北京科技大学, 2015. Li Menglong. Study on sulfide generation behavior and homogenization control in easy-cutting non-quenched and quenched steel[D].Beijing:University of Science and Technology Beijing, 2015.
[4]	谢啸宇, 顾超, 王敏, 等. 中高硫钢中硫化锰夹杂物控制技术[J]. 钢铁, 2021, 56(12): 52-61. Xie Xiaoyu, Gu Chao, Wang Min, et al. Manganese sulfide inclusion control technology in medium and high sulfur steel[J]. Iron and Steel, 2021, 56(12): 52-61.
[5]	Zhang Hao, Liu Nianfu, Hu Fangzhong, et al. Study on modification of inclusions by Mg in 20MnCr5 gear steel[J]. Journal of Iron and Steel Research, 2021,33(8):775−783. (张浩, 刘年富, 胡芳忠, 等. 镁对20MnCr5齿轮钢中夹杂物的改质研究[J]. 钢铁研究学报, 2021,33(8):775−783.
[6]	Zhu Qiangbin, Li Jie, Deng Xiangyang, et al. Inclusion analysis in magnesium free-cutting steel[J]. Iron Steel Vanadium Titanium, 2021,42(2):179−187,192. (朱强斌, 李杰, 邓向阳, 等. 镁系易切削钢中夹杂物分析[J]. 钢铁钒钛, 2021,42(2):179−187,192. doi: 10.7513/j.issn.1004-7638.2021.02.029
[7]	Cao Chenwei ,Wang Gaofeng, Li Jie, et al. Comparative analysis of the effect of Ca and Mg-Al modification on the composite inclusions in S50 C die steel[J] Metallurgical Research & Technology, 2021, 118(5): 512.
[8]	Huang Yu, Cheng Guoguang, Xie You. Modification mechanism of cerium on the inclusions in drill steel[J]. Acta Metallurgica Sinica, 2018,54(9):1253−1261. (黄宇, 成国光, 谢有. 稀土Ce对钎具钢中夹杂物的改质机理研究[J]. 金属学报, 2018,54(9):1253−1261. doi: 10.11900/0412.1961.2018.00079
[9]	Wu Xiangyu, Wu Liangpin, Xie Jianbo, et al. Modification of sulfide by Te in Y1Cr13 free-cutting stainless steel[J]. Metallurgical Research & Technology, 2020, 117(1):12.
[10]	Li Jie, Zhu Qiangbin, Tian Qianren, et al. Modified morphology of MnS inclusions in tellurium treated 303Cu stainless steel[J]. Iron Steel Vanadium Titanium, 2020,41(6):135−141. (李杰, 朱强斌, 田钱仁, 等. 碲改质303Cu不锈钢中MnS夹杂物形态[J]. 钢铁钒钛, 2020,41(6):135−141.
[11]	Shen Ping, Zhou Lei, Yang Qiankun, et al. Modification of MnS inclusion by tellurium in 38MnVS6 micro-alloyed steel[J]. Metallurgical Research and Technology, 2020, 117(6): 615.
[12]	Cao Chenwei, Zhang Panpan, Hu Shaohui, et al. Comparative analysis of microstructure and sulfides of chalcogenide, tellurium and lead-based free-cutting steels[J]. Metallurgical Analysis, 2020,40(7):8−15. (曹晨巍, 张盼盼, 胡绍晖, 等. 硫系、碲系、铅系易切削钢组织及硫化物对比分析[J]. 冶金分析, 2020,40(7):8−15. doi: 10.13228/j.boyuan.issn1000-7571.011061
[13]	Shen Ping, Yang Qiankun, Zhang Dong, et al. Application of tellurium in free-cutting steels[J]. Journal of Iron and Steel Research, International, 2018,25:787−795. doi: 10.1007/s42243-018-0123-2
[14]	Zhang Dong, Shen Ping, Xie Jianbo, et al. A method for observing tridimensional morphology of sulfide inclusions by non-aqueous solution electrolytic etching[J]. Journal of Iron and Steel Research International, 2019,26(3):275−284. doi: 10.1007/s42243-018-0142-z
[15]	钢铁. 用标准图像确定改进机械加工性能的结构钢硫化物形状的特征.显微照相法[S]. 法国: NF A 04-108-1986. Steel. Standard images are used to characterize the shape of structural steel sulfides with improved machinability. Micrography[S]. France: NF A 04-108-1986.
[16]	Shen Ping, Yang Qiankun, Zhang Dong, et al. The effect of tellurium on the formation of MnTe-MnS composite inclusions in non-quenched and tempered steel[J]. Metals, 2018,8(639):1−12.