论文部分内容阅读
本文综述了四十年代以来国外发表的三十二篇有关高速钢冷处理的文献。这些文献所报道的内容可大致归纳为: 1.高速钢淬火后,再深冷处理(-196℃),高温或室温未完成转变的残留奥氏体将继续向马氏体转变,到-80℃时大部分已转变,继续深冷到-196℃,仍会有转变过程,并析出更细小的碳化物,均匀分布在马氏体上。 2.高速钢工具深冷处理时所形成的低温马氏体与室温或较高温度形成的马氏体,在性能上可能有所不同。经深冷处理的工模具的耐磨性有明显的提高。 3.当高速钢工具奥氏体化温度偏高,造
This article reviews thirty-two articles published abroad since the 1940s on the cold-working of high-speed steel. The contents reported in these documents can be summarized as follows: 1. High-speed steel after quenching, and then cryogenic treatment (-196 ℃), high temperature or room temperature incomplete transformation of the retained austenite will continue to martensite transformation to -80 ℃ Most of the time has been changed to continue cryogenic to -196 ℃, there will still be a change process, and precipitation of finer carbides, evenly distributed in the martensite. 2. High-speed steel tool cryogenic treatment formed by the low-temperature martensite and martensite formed at room temperature or higher temperature, the performance may be different. The cryogenic treatment tool wear resistance has been significantly improved. 3. When high-speed steel tool austenitizing temperature is high, made