摘要
探讨了不同热处理工艺对12Cr2Mo1R耐热钢板性能和组织的影响，结果表明：随正火温度的升高贝氏体增加，强度提高，975℃正火后，显微组织为100％贝氏体和（Fe，Cr）3C型渗碳体；随回火温度的提高及回火时间的延长，强度降低，600℃回火时析出的纳米强化相不断长大成针状，同时，（Fe，Cr）3C型渗碳体不断球化，逐渐向（Fe，Cr）7C3型转化；正火处理后再经650℃回火处理，负蠕变现象消失。生产中12Cr2Mo1R钢宜采用正火＋回火处理，正火温度920～950℃，保温时间1．5～3．0min/mm；回火温度720～750℃，保温时间2．0～4．0min／mm。
The influences of different heat treatment process on the microstructure and properties of 12Cr2MolR heat-resistant steel plate were discussed. The results showed that with normalizing temperature rise, the bainite content and the strength rise; after normalizing at 975 ℃, the mierostructure is 100% bainite and （Fe,Cr）3C type cementite; with the increase of tempering temperature and the extension of tempering time, the strength decreases and the nanometer strengthening phase separated in tempering at 600 ℃ grows into a needle, and at the same time, the （Fe,Cr）3C cementite spheroidizes continuously and gradually turns to （Fe,Cr）7C3; the tempering treatment at 650 ℃ after normalizing makes negative creep phenomenon disappearing. In production, 12Cr2MolR ought to adopt normalizing ＋ tempering treatment, the normalizing temperature is between 920 and 950 ℃, the holding time is 1.5-3.0 min/ mm, the tempering temperature is 720-750 ℃ and the holding time is 2.0-4.0 min/mm.
出处
《山东冶金》
CAS
2013年第4期34-36,共3页
Shandong Metallurgy
