碳含量及烧结温度对MIM 4340合金钢组织及力学性能的影响

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摘要采用注射成形工艺制备4340低合金钢,研究碳含量与烧结温度及热处理工艺对合金钢显微组织和力学性能的影响。结果表明：通过添加德国巴斯夫还原型羰基铁粉(CN)及改进型羰基铁粉(OM)的方式,分别配制不同碳含量的混合粉末,并经1 280~1 320 ℃保温2 h烧结后,质量分数为0.50 %碳含量的样品最接近标准碳含量。烧结密度随碳含量的升高先减小后增大,随烧结温度升高而增大。烧结态显微组织由铁素体(α-Fe)、珠光体(铁素体+渗碳体Fe₃C)和贝氏体组成,抗拉强度和伸长率为762.16~1 032.03 MPa和5.25%~8.62%。0.50 %碳含量、1 300 ℃烧结态4340合金钢样品经850 ℃保温0.5 h油冷及400 ℃保温2 h回火热处理后得到最佳力学性能,抗拉强度和伸长率达到1 510.24 MPa和4.30%,硬度为40.0 HRC。

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	许婷
	何浩
	娄嘉
	李益民
	尹健
	刘晨
	秦健春

关键词 ：注射成形, 合金钢, 碳含量, 烧结温度, 热处理, 力学性能

Abstract：4340 low alloy steel was prepared by injection molding process. The effects of carbon contents, sintering temperature and heat treatment process on microstructure and mechanical properties were studied. The results show that the powders with different carbon contents can be prepared by adding CN/OM iron powders. After sintering at 1 280-1 320 ℃ for 2 h, the sample (mass fraction of 0.50% carbon content in raw powders) is closest to the standard carbon content. The density decreases first and then increased with the increase of carbon contents, and the density increases with the increase of sintering temperature. The microstructure consists of ferrite (α-Fe), pearlite (ferrite+cementite Fe₃C) and bainite. The tensile strength and elongation are 762.16 MPa to 1032.03 MPa and 5.25% to 8.62%, respectively. The best mechanical properties are obtained after oil quenching at 850 ℃ for 0.5 hour and tempering at 400 ℃ for 2 h. The tensile strength and elongation reaches to 1 510.24 MPa and 4.30%, respectively, and the hardness is 40.0 HRC.

Key words： injection molding alloy steel carbon content sintering temperature heat treatment mechanical properties

收稿日期: 2019-07-22 出版日期: 2020-06-19

ZTFLH:

TF124

基金资助:湖南省科技计划(2017GK2264); 2019年广西高校中青年教师科研基础能力提升项目(2019KY0381); 柳州市科技计划(2018DH10505)

通讯作者: 尹健,副研究员,博士。电话：13974827640;E-mail: jianyin@csu.edu.cn

引用本文:

许婷, 何浩, 娄嘉, 李益民, 尹健, 刘晨, 秦健春. 碳含量及烧结温度对MIM 4340合金钢组织及力学性能的影响[J]. 粉末冶金材料科学与工程, 2019, 24(6): 563-570.
XU Ting, HE Hao, LOU Jia, LI Yimin, YIN Jian, LIU Chen, QIN Jianchun. Effect of carbon content and sintering temperature on microstructure and mechanical properties of MIM 4340 alloy steel. Materials Science and Engineering of Powder Metallurgy, 2019, 24(6): 563-570.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2019/V24/I6/563

[1] ÖZDEMIR N.Investigation of the mechanical properties of friction-welded joints between AISI 304L and AISI 4340 steel as a function rotational speed[J]. Materials letters, 2005, 59(19/20): 2504-2509.
[2] NASCIMENTO M, SOUZA R, PIGATIN W, et al.Effects of surface treatments on the fatigue strength of AISI 4340 aeronautical steel[J]. International Journal of Fatigue, 2001, 23(7): 607-618.
[3] TRABADELO V, GIMENEZ S, ITURRIZA I.Microstructural characterisation of vacuum sintered T42 powder metallurgy high-speed steel after heat treatments[J]. Materials Science and Engineering: A, 2009, 499(1/2): 360-367.
[4] 张翔, 何浩, 李益民, 等. 碳含量对金属注射成形17-4PH不锈钢显微组织和力学性能的影响[J]. 中国有色金属学报, 2015, 15(4): 945-951.
ZHANG Xiang, HE Hao, LI Yimin, et al.Effect of carbon content on microstructure and mechanical properties of metal injection molded 17-4PH stainless steel[J]. The Chinese Journal of Nonferrous Metals, 2015, 15(4): 945-951.
[5] WU Yunxin, GERMAN R, BLAINE D, et al.Effects of residual carbon content on sintering shrinkage, microstructure and mechanical properties of injection molded 17-4PH stainless steel[J]. Journal of Materials Science, 2002, 37(17): 3573-3583.
[6] COLEMAN A, MURRAY K, KEARNS M, et al.Properties of MIM AISI 420 via pre-alloyed and master alloy routes[C]// Proc. 2013 Int. Conf. Powder Metallurgy Particulate Material, Chicago. 2013: 412-419.
[7] BABAKHANI A, HAERIAN A.Effect of carbon content and sintering temperature on mechanical properties of iron based PM parts produced by warm compaction[J]. Powder Metallurgy Progress, 2008, 8(2): 156-163.
[8] 党文龙, 刘祥庆, 汪礼敏, 等. 碳含量对Fe-Cu-C扩散预合金粉末烧结性能的影响[J]. 粉末冶金技术, 2013, 31(2): 83-88.
DANG Wenlong, LIU Qingxiang, WANG Limin, et al.Influence of carbon content on the properties of diffusion alloyed Fe-Cu-C sintered materials[J]. Powder Metallurgy Technology, 2013, 31(2): 83-88.
[9] DAVIES P, DUNSTAN R, HOWELLS R, et al.Development of master alloy powders, including nickel-based superalloys, for metal injection molding (MIM)[J]. Advances in Powder Metallurgy and Particulate Materials, 2003(8): 8-19.
[10] 陈晨, 杨志南, 张福成. 40CrNiMoV钢在大尺寸轴承中的应用[J]. 金属热处理, 2017, 42(4): 6-11.
CHEN Chen, YANG Zhinan, ZHANG Fucheng.Application of 40CrNiMoV steel to heavy section bearing[J]. Heat Treatment of Metals, 2017, 42(4): 6-11.
[11] JIANG Bo, MEI Zhen, ZHOU Leyu, et al.Microstructure evolution, fracture and hardening mechanisms of quenched and tempered steel for large sized bearing rings at elevated quenching temperatures[J]. Metals and Materials International, 2016, 22(4): 572-578.
[12] HE Hao, LOU Jia, LI Yimin, et al.Effects of oxygen contents on sintering mechanism and sintering-neck growth behaviour of FeCr powder[J]. Powder Technology, 2018, 329: 12-18.
[13] HRUBOVCAKOVA M, DUDROVA E, HARVANOVA J.Influence of carbon content on oxides' reduction during sintering of Cr-Mo-C prealloyed steel[J]. Powder Metallurgy Progress, 2011, 11(1/2): 114-122.
[14] CHASOGLOU D, HRYHA E, NORELL M, et al.Characterization of surface oxides on water-atomized steel powder by XPS/AES depth profiling and nano-scale lateral surface analysis[J]. Applied Surface Science, 2013, 268: 496-506.
[15] BERGMAN O.Influence of oxygen partial pressure in sintering atmosphere on properties of Cr-Mo prealloyed powder metallurgy steel[J]. Powder Metallurgy, 2007, 50(3): 243-249.
[16] XU Feng, LI Yongcun, HU Xiaofang, et al.In situ investigation of metal's microwave sintering[J]. Materials Letters, 2012, 67(1): 162-164.
[17] LOU Jia, LI Yimin, HE Hao, et al.Effect of atomisation medium on sintering properties of austenitic stainless steel by eliminating influence of particle shape and particle size[J]. Powder Metallurgy, 2010, 53(2): 112-117.
[18] 陈宗民. Fe-C-Cr 合金三相共晶与四相包共晶反应对铬系白口铸铁组织的影响[J]. 山东理工大学学报, 2001, 18(3): 25-27.
CHEN Zongmin.The effects of eutectic and quasi-peritectic equilibrium in the Fe-C-Cr System on the chromium white cast irons[J]. Journal of Shandong Institute of Technology, 2001, 18(3): 25-27.
[19] 刘乐. 40CrNiMo钢辊轴的热处理工艺[J]. 金属热处理, 2013, 38(10): 84-85.
LIU Le.Heat treatment process of 40CrNiMo steel roller shaft[J]. Heat Treatment of Metals, 2013, 38(10): 84-85.
[20] 滕志强, 刘永, 李红梅, 等. 40CrNiMo 合金钢锻件淬火冷却控制技术研究[J]. 金属加工, 2016, 768(23): 34-36.
TENG Zhiqiang, LIU Yong, LI Hongmei, et al.Research on quenching and cooling control technology of 40CrNiMo alloy steel forgings[J]. Metal Working, 2016, 768(23): 34-36.