添加1%Mo提高针阀体用钢18Cr2Ni2的强韧性

doi:10.11896/cldb.20030159

Abstract
Figure/Table
References
Related Citation (2)

Download:

Full Text ( PDF ) (6855KB)
Export: BibTeX | EndNote (RIS)

Abstract Higher combination of strength and toughness of carburizing steels has been demanded for needle valve bodies in new generation diesel engines.Based on 18Cr2Ni2, a typical steel for needle valve bodies, 18Cr2Ni2Mo steel was promoted by additional alloying of 1wt% Mo. Mechanical properties of these two steels in quenching and tempering state were determined. Their microstructures were respectively examined by OP, FESEM, TEM and XRD. The spatial distribution of alloying elements was systematically investigated by atom probe tomography (APT). The results show that 1wt% Mo alloying leads to stronger strengthening via greater solid solution, finer grains and higher dislocation density. Moreover, it is proposed that Mo inhibits the formation of micro-twin martensite during quenching and increases the toughness of 18Cr2Ni2Mo steel. Therefore, the product of strength and ductility of the new type steel is significantly improved from 11.73 GPa% to 18.18 GPa%, and the impact absorption energy is increased from 46.3 J to 71.0 J.

Key words： carburizing steel needle valve body Mo alloying strength-toughness combination carbon segregation

Published: 01 July 2021

CLC number:

TG156

Fund:Natural Science Foundation of China (051301105, 051471105).

About author:: Yanzheng Li,a graduate student of Shanghai University,mainly engaged in research of automotive steels.
Yongan Min, associate professor, School of Materials Science and Engineering, Shanghai University. The main research area is metal materials and surface modification.

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LI Yanzheng
	YUN Xiaoxue
	LAI Chengban
	HE Changlin
	MIN Yongan

Cite this article:

LI Yanzheng,YUN Xiaoxue,LAI Chengban, et al. Adding 1%Mo to Enhance Strength-toughness Combination of 18Cr2Ni2 Steel for Needle Valve Bodies[J]. Materials Reports, 2021, 35(12): 12130-12135.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.20030159 OR http://www.mater-rep.com/EN/Y2021/V35/I12/12130

1 Osman Asi.Engineering Failure Analysis, 2006, 13(7), 1126.
2 Hu S. Research on electronic controlled injector design and performance for middle-high speed diesel engine. Master's Thesis, Harbin Engineering University, China, 2016 (in Chinese).
扈爽. 中高速柴油机电控喷油器设计与性能研究. 硕士学位论文, 哈尔滨工程大学,2016.
3 Hu X H. Study on preparation and wear resistance of nozzle matching parts's material. Master's Thesis, North China Electric Power University(Beijing), China, 2016 (in Chinese).
胡湘红. 喷油嘴偶件材料的制备及耐磨性研究. 硕士学位论文, 华北电力大学(北京),2016.
4 Kratzer D, Dobler F, Tobie T, et al. Journal of Mechanical Engineering Science, 2019, 233(21-22),7350.
5 Gao J Z. Study on properties of heat treatment technology for new-type high-alloy 17Cr2Ni2Mo carburizing gear steel. Master's Thesis, Zhengzhou Machinery Research Institute, China, 2011 (in Chinese).
高金柱. 新型高合金齿轮渗碳钢17Cr2Ni2Mo热处理工艺特性研究. 硕士学位论文, 郑州机械研究所, 2011.
6 Long S L, Liang Y L, Jiang Y, et al.Materials Science & Engineering A, 2016, 676, 38.
7 Lu Y M, Liang Y L, Long S L, et al.Chinese Journal of Materials Research, 2018, 32(4), 290(in Chinese).
卢叶茂, 梁益龙, 龙绍檑, 等. 材料研究学报, 2018, 32(4), 290.
8 Wan R C. Study on strengthening mechanism of Mo and replacement of Mo in fire-resistant steel. Ph.D. Thesis, Shanghai Jiaotong University, 2011 (in Chinese).
万荣春. 耐火钢中Mo的强化机理及其替代研究. 博士学位论文, 上海交通大学,2012.
9 Bimal K P. Bulletin of Materials Science, 2006, 29(1), 59
10 Sha W, Kelly F S. Materials Science and Technology, 2004, 20(4), 451.
11 Zhang C, Huang J F, Dou M Y, et al.Heat Treatment of Metals, 2016, 41(5), 1(in Chinese).
张程, 黄进峰, 窦梦阳, 等. 金属热处理, 2016, 41(5), 1.
12 Lin G B, Zhao P, Ao W.Iron Steel, 2019, 54(5), 73(in Chinese).
林国标, 赵攀, 敖伟.钢铁, 2019, 54(5), 73.
13 Xiao G L. The preparation and organizational performance analysis of 18CrNiMo7-6 carburized gear steel. Master's Thesis, Harbin Institute of Technology, China, 2014 (in Chinese).
肖广林. 齿轮渗碳钢18CrNiMo7-6的制备及组织性能分析. 硕士学位论文, 哈尔滨工业大学, 2014.
14 Zhou Z Y. Study on bainite isothermal quenching and tempering stability of new medium carbon bearing steel. Master's Thesis, Shandong University, China, 2012(in Chinese).
周志云. 新型中碳轴承钢贝氏体等温淬火工艺及回火稳定性研究. 硕士学位论文, 山东大学, 2012.
15 Marceau R K W, Choi P, Raabe D.Ultramicroscopy, 2013, 132, 239.
16 Xie C, Wu X C, Min N, et al.Acta Metallurgica Sinica, 2015, 51(3), 325(in Chinese).
谢尘, 吴晓春, 闵娜, 等. 金属学报, 2015, 51(3), 325.
17 Xu Z Y, Li X M.Acta Metallurgica Sinica, 1983(2), 8(in Chinese).
徐祖耀, 李学敏. 金属学报, 1983(2), 8.
18 Li S H. Research of microstructure design and control on high strength high toughness cold work die steel.Ph.D. Thesis, Shanghai University, China, 2011 (in Chinese).
李绍宏. 高强韧冷作模具钢组织设计及组织控制研究. 博士学位论文, 上海大学, 2011.
19 Zhou Z N, Wu K M.Heat Treatment of Metals, 2011,36(11), 1(in Chinese).
周珍妮, 吴开明. 金属热处理, 2011,36(11), 1.
20 Gao Q Z.Phase transformation behaviors and welding of the modified high Cr ferritic heat-resistant steel. Ph.D. Thesis, Tianjin University, China, 2012 (in Chinese).
高秋志. 新型高Cr铁素体耐热钢相变行为及焊接性. 博士学位论文, 天津大学, 2012.
21 Deng Y Q. First-principle study of the solution and diffusion behavior of the interstitial atom in substitutional solid solutions. Master's Thesis, Tianjin University, China, 2014 (in Chinese).
邓义群. 置换固溶体中间隙原子溶解和扩散的第一性原理研究. 硕士学位论文, 天津大学, 2014.
22 Wen T, Hu X F, Song Y Y, et al.Acta Metallurgica Sinica, 2014, 50(4), 447(in Chinese).
温涛, 胡小锋, 宋元元, 等. 金属学报, 2014, 50(4), 447.
23 Wang Y, Yang Z, Zhang F, et al.Materials Science and Engineering: A, 2016, 676, 166.
24 Wang X, Li S D, Zhou S T, et al.Heat Treatment of Metals, 2018, 43(3), 50 (in Chinese).
王鑫, 李昭东, 周世同, 等. 金属热处理, 2018, 43(3), 50.
25 Araki S, Mashima K, Masumura T, et al. Scripta Materialia, 2019, 169, 38.
26 Song Z L, Du X D, Chen Y Q, et al.Transactions of Materials and Heat Treatment, 2011, 32(5), 95(in Chinese).
宋自力, 杜晓东, 陈翌庆, 等. 材料热处理学报, 2011, 32(5), 95.
27 Li J R, Zhang C L, Jiang B, et al. Journal of Alloys and Compounds, 2016, 685, 248.