EFFECTS OF SUBZERO TREATMENTS ON CACBIDE ORGANIZATION TRANSFER OF SKD11 STEEL AFTER QUENCHING METHOD

Vũ Văn Khánh; Trần Thị Mai; Nguyễn Xuân Trường

doi:10.34238/tnu-jst.5176

EFFECTS OF SUBZERO TREATMENTS ON CACBIDE ORGANIZATION TRANSFER OF SKD11 STEEL AFTER QUENCHING METHOD

About this article

Received: 14/10/21 Revised: 28/02/22 Published: 28/02/22

Authors

1. Vu Van Khanh , Nam Dinh University of Technology Education
2. Tran Thi Mai, Instuitute of Energy and Mining Mechanical Engineering
3. Nguyen Xuan Truong, Instuitute of Energy and Mining Mechanical Engineering

Abstract

The carbide organization determines the hardness and wear resistance of SKD11 steel. However, depending on the heat treatment method, this organization may change to improve the hardness of SKD11 steel. This paper presents the results of studying the carbide transformation process and properties of SKD11 steel when quenched at 1050^oC with a holding time of 30 minutes and then cold-treated at temperatures (-20^oC; -80^oC) with two different time modes 2h and 24h. The results show that: In case SKD11 steel is tempered and kept heat, inside the steel appears carbide organization mainly in the form of M₇C₃and the hardness is about 57HRC. In the case of cold-treated SKD11 steel, the residual martensite and austenitic solid solution in the steel has secreted a fine M₃C₂ carbide phase with size 0.1÷ 0.5μm; the amount of carbide tends to change depending on the temperature cold treatment -20^oC (~16% carbide); -80^oC (~20% carbide). Extended sub-zero treatment times tend to increase the carbide content in steel slightly but not significantly. After cryogenic treatment at different temperatures, steel samples have high hardness and stability above 63HRC.

Keywords

Cryogenic treatment; Sub-zero Treatment; Treatment; Steel SKD11; Carbide

Full Text:

PDF (Tiếng Việt)

References

[1] ‎ASM International, ASM Metals HandBook Vol 4 - Heat Treating, 10^th ed, USA, 1991.

[2] V. T. Trinh, V. T. Nguyen, V. G. Hoang, A. S. Nguyen, H. T. Pham, T. H. Nguyen, and H. D. Bui, “Study on heat treatment of SKD11 steel for high precise gauges using for mechanical assembly,” Science and Technology of Metals, vol. 87, pp. 33-39, 2019.

[3] Y. Meng, J. -Y. Zhang, H. Zhan, Q. Chen, J. Zhou, S. Sugiyama, and J. Yanagimoto, “Effects of subsequent treatments on the microstructure and mechanical properties of SKD11 tool steel samples processed by multi-stage thixoforging,” Materials Science and Engineering A, vol. 762, 2019, Art. no. 138070, doi: 10.1016/j.msea.2019.138070.[4] T. T. H. Phung and A. S. Nguyen, “Decode defects to improve the quality of cold working dies of SKD11 Steel,” Science and Technology of Metals, vol. 35, pp. 31-35, 2011.

[5] V. H. Nguyen and T. C. Le, ”Low temperature carbonitriding of die steels SKD61 and SKD11 by liquid method for diffusion layer with dispersive carbide and nitride particles,” Science and Technology of Metals, vol. 10, pp.25-29, 2007.

[6] T. T. H. Phung and V. D. Nguyen, “Nitriding of SKD11 Steel used for the deep drawing an press forming dies,” Science and Technology of Metals, no. 32, pp. 36-40, 2010.

[7] D. Das, A. K. Dutta, and K. K. Ray, “Sub-zero treatments of AISI D2 steel: Part I. Microstructure and hardness,” Materials Science and Engineering A , vol. 527, pp. 2182-2193, 2010.

[8] D. Das, A. K. Dutta, and K. K. Ray, “Sub-zero treatments of AISI D2 steel: Part II. Wear Behaviour,” Materials Science and Engineering A, vol. 527, pp. 2194-2206, 2010.

[9] G. Roberts, G. Krauss, and R. Kennedy, Tool Steels, 5^th ed, ASM International, Metals Park, OH, USA.

[10] R. E. Reed-Hill and R. Abbashian, Physical Metallugy Principles, 3^rd ed, PWS Publishing Company, Boston.

[11] H. Scott, “Relation of the high-temperature treatment of high-speed steel to secondary hardening and red-hardness” Scientific Papers of the Bureau of Standards, vol. 16, no. 395, pp. 521-536, 1920

[12] D. N. Korade, “Effect of Deep Cryogenic treatment on Tribological Behaviour of D2 Tool Steel - An Experimental Investigation,” Materials Today: Proceedings, vol. 4, no. 8, pp. 7665-7673, 2017.

[13] K. Masuda, M. Oguma, S. Ishihara, and A. J. McEvily, “Investigation of subsurface fatigue crack growth behavior of D2 tool steel (JIS SKD11) based on a novel measurement method,” International Journal of Fatigue, vol. 133, April 2020, Art. no. 105395, doi: 10.1016/j.ijfatigue.2019.105395

[14] D. N. Collins and J. Dormer, “Deep cryogenic treatment of a D2 cold-work tool steel,” Heat Treat Met, vol. 3, p. 71e4, 1997.

[15] J. H. Sung, C. G. Lee, Y. Z. You, Y. K. Lee, and J. Y. Kim, “Microstructural Changes of SKD11 Steel during Carbide Dispersion Carburizing and Subzero Treatment,” Solid State Phenomena, vol. 118, pp. 115-120, 2016.

DOI: https://doi.org/10.34238/tnu-jst.5176

Refbacks

There are currently no refbacks.



Remember me