GH625合金锻造工艺研究

Technical study on GH625 alloy forging

通过GH625合金的不同热处理工艺与组织、性能关系的研究及采用不同加热温度、不同应变速率及不同变形量的工艺试验,确定出合理的热工艺参数。结果为:变形温度1 100℃～1 140℃,变形量20%～50%,临界变形10%左右。合理的热处理制度为:固溶温度990℃～1 030℃,保温60 min,空冷或水冷。990℃固溶处理时可适当延长保温时间,在此温度范围内处理,可获得6级～8级晶粒组织。与空冷相比,水淬组织更加均匀,晶粒更细小些。

This paper studies the effects of heat treatment crafts on the microstructure and mechanical prop- erties of the GH625 alloy. The reasonable process parameters are determined through the engineer testing of using different heating temperatures, strain speeds and amounts of deformity. They are as follows ： the dis- tortion temperature range is 1100~C ~ 1140~C, the range of deformity amount 20% - 50%, and the ultimate strain about 10%. The reasonable heat treatment system is： when the melting temperature range is 990~C 1030~C, the soaking time for solid solution treatment is 60 minutes, with air-cooling or water-cooling; at the temperature of 990~C, the soaking time should be lengthened suitably and 6 ~ 8 levels of crystal grain or- ganizations will be obtained. Compared with the air-cooled organization, water-quenched one is evener and the crystal grain is finer.