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高速钢属莱氏体钢,其中含有大量的一次和二次合金碳化物,即使在1300℃的高温下,一次碳化物也不能完全溶解到奥氏体中,因此,这类复杂的合金碳化物不能靠正常的热处理方法来消除,只有通过压力加工的途径,将粗大的共晶碳化物击碎,并使其均匀化。故锻造的目的,不仅是为了成型,更重要的是改变碳化物的形状及分布,提高钢材内部组织的质量。我厂高速钢锻造任务量大,年锻造量在160t以上,占年用量的75％。锻造质量的优劣,直接关系到厂的生存和发展。加热速度在锻造工艺中是一
High-speed steel is a martensitic steel, which contains a large amount of primary and secondary alloy carbides, even in the high temperature 1300 ℃, the primary carbides can not be completely dissolved in the austenite, therefore, such complex alloy carbide Can not be eliminated by the normal heat treatment method, only by means of pressure processing, the coarse eutectic carbide crush, and make it uniform. Therefore, the purpose of forging is not only for forming, but more importantly, changing the shape and distribution of carbides and improving the quality of the internal steel structure. I plant a large number of high-speed steel forging task, the amount of forging more than 160t, accounting for 75% of annual consumption. Forging quality advantages and disadvantages, directly related to the survival and development of the plant. The heating rate is one in the forging process