采用SEM、TEM等方法研究了不同回火温度对Aermet100超高强度钢的显微组织和韧性的影响.结果表明,Aermet100钢经885℃淬火后,在472 ～ 492℃温度范围内回火,显微组织为高位错密度的板条马氏体(板条M)和少量逆转变奥氏体(AR).随着回火温度的升高,板条M宽度略有增加,韧化相AR的含量有所提高.高密度位错马氏体的存在使得Aermet100钢保持较高的韧性水平,而逆转奥氏体含量的增加则导致Aermet100钢的韧性显著提高.
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