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本文研究了5CrMnMo钢经高温形变淬火后,重复淬火、回火时形变亚结构组织的遗传作用。试验证明,高温形变所形成的大量亚结构不仅可遗传给直接淬火后的马氏体,而且在反复高温加热淬火及回火时仍具有强烈的遗传效应。随着淬火加热循环次数的增加和保温时间的延长,这种遗传效应具有缓慢减弱的趋势。试验还证明,5CrMnMo钢形变淬火后经高温回火和再淬火、回火后,可显著提高机械性能。
In this paper, the genetic effect of the deformed substructures in 5CrMnMo steel after quenching and tempering at high temperature was studied. Experiments show that a large number of sub-structures formed by high-temperature deformation can not only inherit the martensite directly after quenching, but also have a strong genetic effect when quenching and tempering at high temperature. With the increase of the number of heating cycles and the holding time, the genetic effect tends to weaken gradually. Test also proves that 5CrMnMo steel after quenching by high temperature tempering and re-quenching, tempering, can significantly improve the mechanical properties.