Effect of programmable ion permeation on high temperature wear resistance of a novel hot-working die steel

doi:10.13251/j.issn.0254-6051.2022.09.026

Abstract

Abstract: Effect of programmable ion permeation (PIP) on microstructure and high temperature wear resistance of a novel hot-working die steel was studied by means of high temperature wear testing machine, X-ray diffraction (XRD), scanning electron microscope (SEM) and micro-hardness testing machine. The results show that when the novel hot-working die steel is treated by PIP, a dense and complete compound layer reaching 40 μm is formed. The out layer is composed of Fe₃O₄ phase, which can reduce the surface friction coefficient. The subsurface layer is composed of Fe_2-3N and Fe₄N phases, which can improve the surface hardness. When the wear test temperature is lower than 600 ℃, Fe_2-3N and Fe₄N phases exist stably. When the wear test temperature is higher than 800 ℃, Fe_2-3N and Fe₄N phases transform into α-Fe phase to form a nitrogen-containing martensite structure, which improves the high temperature wear resistance of the material.

Key words: novel hot-working die steel, programmable ion permeation technology, high temperature wear resistance

CLC Number:

TG142.3

Li Wenming, Luo Defu, Liao Hongyi, Pan Hongji. Effect of programmable ion permeation on high temperature wear resistance of a novel hot-working die steel[J]. Heat Treatment of Metals, 2022, 47(9): 146-152.

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