A Novel Method for Development of High-strength on 20 Steel Plate by Surface Shot Blasting Treatment and Nitriding

DOI

10.2991/icmmcce-17.2017.71How to use a DOI?

Keywords

plastic deformation; surface shot blasting treatment; nitriding.

Abstract

With the impact of 304 stainless steel balls, a plastic deformation layer of submicron grains with abundance defects was produced on the surface of 20 steel by mean of surface shot blasting treatment (SSBT), the thickness of plastic deformation layer is 100 m and 120 m for 30 min and 60 min SSBT, respectively. The treated and un-treated spencimens were nitrided in gas nitriding furnace. A Fe2-3N and Fe4N compound layer formed on the surface of the specimens after nitriding. All compound layers have the similar thickness with different SSBT time. N element has diffused to core of the specimens in the experimental condition of this work, the diffusion layer of specimens contain many granular cementite and some needle-like Fe4N nitride, and the numbers of nitride in 60 min SSBT is much more than that in 30 min treament. The Maximum value of microhardness after 30 min and 60 min treatment nitrided was 823 HV and 802 HV measured on the surface of all treated specimens and then it gradually decreased to the core value as the increase of the depth. The tensile strength of 30 min and 60 min SSBT nitriding specimens is 581 MPa and 627 MPa, respectively. And increased obviously from 397 MPa of the initial specimen.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yongcun Li
AU  - Ping Li
AU  - Ke Wang
AU  - Weiping Tong
PY  - 2017/09
DA  - 2017/09
TI  - A Novel Method for Development of High-strength on 20 Steel Plate by Surface Shot Blasting Treatment and Nitriding
BT  - Proceedings of the 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 2017)
PB  - Atlantis Press
SP  - 339
EP  - 345
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmmcce-17.2017.71
DO  - 10.2991/icmmcce-17.2017.71
ID  - Li2017/09
ER  -