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一、前言当前,机械行业在加工硬度为HB280-HB400的中硬齿面齿轮和高速(1000次/分钟)插齿中,用钨钼类高速钢制造的齿轮刀具已经满足不了工艺要求。一些含钴的高性能、高硬度高速钢如W7Mo4Cr4V2Co5(M41)和W2MogCr4VCo8(M42)逐渐较多地应用在工具制造中。但是,由于钴高速钢的含碳量高、合金元素多,化学成份复杂,碳化物偏析严重。同普通高速钢相比,其热塑性
I. Introduction At present, the gear industry of tungsten carbide and molybdenum high-speed steel can not meet the technical requirements in the middle of hardened gears and high-speed (1000 beats / minute) gear hardened by HB280-HB400 in the machinery industry. Some cobalt-containing, high-performance, high-hardness high-speed steels such as W7Mo4Cr4V2Co5 (M41) and W2MogCr4VCo8 (M42) are increasingly used in tooling. However, due to high carbon content of high-speed cobalt steel, alloy elements, complex chemical composition, carbide segregation serious. Compared with ordinary high-speed steel, its thermoplastic