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用水浴量热计法测得 18Cr2Ni4WA 钢的相变再结晶温度分别为880℃(1100℃/30′、1200℃/30′锻后空冷)和885℃(1300℃/20′锻后空冷、1200℃/30′空冷)。并根据相变再结晶理论和相变再结晶温度用实验方法确定了消除该钢组织遗传的热处理工艺。对于1300℃/20′锻件,采用930℃/1H 两次加热和930℃/20H 长期保温可消除粗大组织的遗传,对于1200℃/30′锻件,采用930℃/1H 两次加热和890℃/20H 工艺可以消除组织遗传,而1200℃/30′空冷件,可采用890℃/1H+930℃/1H 和890℃/10H 工艺来消除组织遗传。
The phase transition recrystallization temperatures of 18Cr2Ni4WA steels measured by water bath calorimeter were 880 ℃ (1100 ℃ / 30 ’, 1200 ℃ / 30’ air cooled) and 885 ℃ (1300 ℃ / 20 ’air cooled after forging 1200 ° C / 30 ’air cooling). According to the phase change recrystallization theory and the phase transition recrystallization temperature, the heat treatment process to eliminate the heredity of the steel was determined experimentally. For the 1300 ℃ / 20 ’forgings, the heredity of coarse tissue was eliminated by using 930 ℃ / 1H double heating and 930 ℃ / 20H long-term heat preservation. For 1200 ℃ / 30’ forgings, 930 ℃ / 1H heating and 890 ℃ / 20H process can eliminate the tissue genetic, and 1200 ℃ / 30 ’air-cooled parts, 890 ℃ / 1H + 930 ℃ / 1H and 890 ℃ / 10H process can be used to eliminate tissue genetic.