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Zou J.,Jiangxi Key Laboratory of Advanced Copper and Tungsten Materials | Zou J.,Shanghai Key Laboratory of Modem Metallurgy and Materials Processing | Liu C.,Nanchang Hangkong University | Lu D.,Jiangxi Key Laboratory of Advanced Copper and Tungsten Materials | And 5 more authors.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2015

Surface of H13 steel was treated by pulse-plasma detonation technique (PPDT). The microstructure, fracture and element distribution were analyzed by means of optical microscope, scanning electron microscope and energy-dispersive spectrum, the microhardness was measured by Knoop hardness tester, and the modification and technique parameters were analyzed and discussed. The results show that modified layer with uniform thickness, compact structure and high hardness can be obtained by PPDT. The modified layer is divided into two areas: column structure zone and fine grain zone, the element of electrode is implanted into the surface, and the hardness firstly increases and then decreases with the depth of the modified layer. With increasing of treatment energy, the thickness of modified layer increases, the grains size becomes finer, and the hardness of layer is higher. © 2015, Chinese Mechanical Engineering Society of Heat Treatment. All right reserved. Source

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