ホブ材質に関する基礎的研究

概要

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In order to develop hob material which decreases wear, the influence of composition, heat treatment, hardness, and transverse rupture strength (TRS) of a hob on flank wear and crater wear was investigated in this paper. Experiments were carried out with a simple fly tool. Powder metal high-speed steel (PM-HSS) is better than normal HSS in decreasing wear. Among the materials tested, PM-HSS containing high vanadium and high cobalt performed best. The influence of heat treatment on hob wear is different according to the composition of the materials. At a low quenching temperature and a high tempering temperature for PM-HSS containing high vanadium and high cobalt, hob wear decreases. Corner wear and crater wear decrease with increasing hardness, and with decreasing TRS. Materials having more than 900 H_v hardness and 3 000 N/mm^2 TRS are suitable for making hobs.
一般社団法人日本機械学会の論文
1992-04-25