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瑞典Uddeholm公司在美国的分公司已开发和正在开发用作热锻和铝压铸的高温模具钢,其耐磨性十分优异。为热锻用模具而开发的工具钢的商品牌号为Toughtem,为铝压铸用模具而正在开发的工具钢的商品牌号为QRO90。Toughtem是成分为0.45C-1.5Cr-0.4Ni-0.2Mo-0.1V(％)的低合金钢,用某种添加剂形成均匀微细的组织。因此,耐磨性和冲击韧性优异,且切削性良好。关于Toughtem的布氐硬度,非热处理
Uddeholm’s Swedish subsidiary in the United States has developed and is developing high-temperature tool steels for hot-forging and aluminum die-casting, with excellent wear resistance. The tool steel developed for hot forging dies is available under the trade designation Toughtem and the tool steel under development for aluminum die casting is brand name QRO90. Toughtem is a low-alloy steel with a composition of 0.45C-1.5Cr-0.4Ni-0.2Mo-0.1V (%), with a certain additive to form a uniform and fine structure. Therefore, abrasion resistance and impact toughness are excellent, and machinability is good. About Toughtem’s cloth hardness, non-heat treatment