Effects of microshot peening on surface characteristics of high-speed tool steel
Effects of microshot peening on surface characteristics of high-speed tool steel
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DOI：
10.1016/j.jmatprotec.2007.11.247
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发表时间：
2008-05-26
影响因子：
6.3
通讯作者：
Kohamada, S.
中科院分区：
文献类型：
--
作者：
Harada, Y.;Fukauara, K.;Kohamada, S.
研究了微喷丸对高速工具钢表面特性的影响。喷丸强化广泛应用于汽车工业，以提高机械零件的疲劳寿命和表面特性。最近，已经开发了新的喷丸介质来增强喷丸效果。新媒体比传统媒体更小，更难。使用新介质可以有效地改善工具钢的表面。本文旨在研究高速工具钢的强化喷丸效果。在本研究中，一个压缩空气式微喷丸装置与加热炉进行了实验。喷丸微丸由硬质合金制成，工件为高速工具钢。测量了喷丸工件的表面粗糙度、压缩残余应力和硬度。用X射线衍射法得到了残余应力在厚度方向上的分布。研究了加工温度对表面特性的影响以及微喷丸对疲劳特性的影响。硬微丸的使用被证明会导致高速工具钢的喷丸效果显著增强。(C)2007 Elsevier B.V.保留所有权利。
The effects of microshot peening on the surface characteristics of high-speed tool steel were investigated. Shot peening is widely used in automotive industry to enhance fatigue life and the surface characteristics of machine parts. More recently, new shot media have been developed to enhance the peening effect. New media is smaller and harder than the conventional one. The use of new media is effective in improving the surface of tool steels. The aim of this paper is to present the enhanced peening effect for the high-speed tool steel. In the present study, a compressed air-type microshot peening apparatus with a heating furnace was produced experimentally. Peening microshot was made of cemented carbide, and the workpiece was the high-speed tool steel. Surface roughness, compressive residual stress, and hardness of the peened workpieces were measured. The distribution of residual stress in the thickness direction was obtained from the X-ray diffraction method. The effects of processing temperature on the surface characteristics and the effect of microshot peening on fatigue characteristic were also examined. The use of hard microshots was shown to cause a significantly enhanced peening effect for high-speed tool steel. (C) 2007 Elsevier B.V. All rights reserved.