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1,美国专利4523965:控制高碳钢显微淬火裂纹的方法。1985年6月18日公布。利用这种方法可使高碳钢淬火时形成的马氏体不产生显微裂纹。其工艺是:将钢加热到奥氏体化温度(980～1060℃),使碳化物溶解,再冷却到MH(100～280℃)以下,在该温度下保持5分钟至1小时,形成约20～35％的马氏体。然后在205～260℃回火10—30分钟。此后,钢冷却到室温或零度以下,使残余奥氏体转变成马氏体。热处理的最后工序是在回火时再一次形成马氏体。2,日本公开特许公报59—182911:钢锭的热处理加热方法。1984年10月17日公布。
1, U.S. Patent 4,523,965: Method for controlling micro-quench cracking of high-carbon steel. June 18, 1985 announcement. The use of this method can make high-carbon steel quenched martensite does not produce micro-cracks. The process is: the steel is heated to austenitizing temperature (980 ~ 1060 ℃), so that dissolved carbide, and then cooled to MH (100 ~ 280 ℃) below, at this temperature for 5 minutes to 1 hour to form about 20 ~ 35% martensite. Then tempered at 205-260 ° C for 10-30 minutes. Thereafter, the steel is cooled to room temperature or below, causing the retained austenite to be transformed into martensite. The final process of heat treatment is the formation of martensite once again during tempering. 2, Japanese Laid-Open Patent Publication No. 59-182911: Heat treatment method for ingot heating. October 17, 1984 announcement.