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Effect of High-Energy Shot-Peening on H13 Tool Steel Ion-Nitriding

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Abstract:

High-energy shot-peening on H13 steel after quenched. The samples with or without high-energy shot-peening were ion-nitrided at 520°C for 3h．The Microstructure，nitriding depth, hardness gradient, surface phase and Corrosion resistance of the nitride layers were compared between the high-energy shot-peening samples and the original samples using optical microscope, micro-hardness tester, X-ray diffraction and CH1660A electrochemical test. Results show that the high-energy shot-peening greatly speeds up the nitriding on the H13 steel at 520°C for 3h.. The depth of ion-nitriding layer after shot peening is from 0.11mm to 0.16mm, micro-hardness of the surface layer is from 998HV0.5 to 1105HV0.5, The hardness gradient is slightly flat . Phase structure and content of the surface is different by Powerful shot-peening and not. Corrosion resistance of the samples by high-energy shot-peening is significantly improved because it is easier to form a stable passive film.

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Periodical:

Advanced Materials Research (Volumes 393-395)

Pages:

67-71

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.393-395.67

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Online since:

November 2011

Authors:

Zhi Lan Ren, Xin Heng Wang

Keywords:

Corrosion Resistance, H13 Steel, High-Energy Shot-Peening, Ion-Nitriding, Microstructure, Surface Phase Structure

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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