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本文研究了18Cr2Ni4WA钢锻热淬火工艺参数对锻热淬火及锻热淬火后加二次淬火的机械性能的影响。结果表明,提高加热温度、降低变形温度对改善锻热淬火后的强韧性是有益的;形变量对锻热淬火后性能影响不明显;锻后停留时间在30秒内延长时强度下降,再延长停留时间强度变化不大。锻热淬火试样经二次淬火后晶粒显著细化,强度明显提高,其综合机械性能与用某厂现行生产工艺处理的相当或略高。锻热淬火工艺参数对二次淬火后性能影响不大,锻后可采用空冷代替油冷。二次淬火加热温度为850℃时,随保温时间延长强度上升;加热温度为880℃时,随保温时间延长强度下降。本文在实验基础上提出了可以代替现行生产工艺的新工艺,在保证性能的前提下,简化了生产工艺,降低了能源消耗。
In this paper, 18Cr2Ni4WA steel forging quenching process parameters for forging quenching and forging quenching plus secondary quenching mechanical properties. The results show that increasing the heating temperature and decreasing the deformation temperature are beneficial to improve the toughness after forging quenching; the amount of deformation has no obvious effect on the properties after forging quenching; the strength decreases when the residence time is prolonged within 30 seconds after forging, Residence intensity did not change much. Forging quenched after quenching the sample significantly refined grain, the strength was significantly improved, and its comprehensive mechanical properties with a plant with the current production process to deal with the same or slightly higher. Forging heat quenching process parameters after quenching performance is not affected, after forging can be replaced by air-cooled air-cooled. When the secondary quenching temperature is 850 ℃, the strength increases with the holding time; when the heating temperature is 880 ℃, the strength decreases with the holding time prolongs. Based on the experiment, this paper proposes a new process that can replace the current production process, simplifies the production process and reduces the energy consumption under the premise of ensuring the performance.