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铬矿床地理位置集中(铬储量的70％以上在南非)。铬的供应潜在着很大的危险。为解决供应上的这种局限性,在冷作和热作工具钢中早就进行了用锰部分代替铬的研究。最近西德Thyssen特钢公司对最通用的高速钢S 6-5-2研究了用锰代铬的问题。试验钢在实验室冶炼,浇注成100kg钢锭(平均直径180mm),锻成20、40和60mm方形材。钢的合铬量变化为4.10、3.10、2.05和1.10％,对应的锰量变化为0.29、0.69、1.42和1.94％。经热处理后对钢的组织、淬火和回火性能、相交行为、韧性、热加工
Chromium deposits are geographically concentrated (over 70% of chromium reserves are in South Africa). The supply of chromium is potentially dangerous. To address this limitation in supply, studies have been conducted to replace chromium with manganese in cold work and hot work tool steels. Recently Thyssen Steel, West Germany, studied the problem of chromium for manganese on the most versatile high-speed steel S 6-5-2. The test steel was smelted in a laboratory and cast into 100 kg steel ingots (average diameter 180 mm) and forged into 20, 40 and 60 mm square pieces. Chromium content of steel changed 4.10,3.10,2.05 and 1.10%, corresponding to the amount of manganese was 0.29,0.69,1.42 and 1.94%. After heat treatment of steel on the organization, quenching and tempering properties, intersecting behavior, toughness, thermal processing