两相区回火温度对Mn-Mo系微合金钢亚稳奥氏体形成及力学性能的影响
发布时间：2018-10-25 08:42
【摘要】：利用X射线衍射(XRD)、热膨胀仪、电子背散射衍射(EBSD)研究了两相区回火温度对一种Mn-Mo系微合金钢亚稳奥氏体形成及力学性能的影响。结果表明:当两相区回火温度低于650℃时,实验钢的亚稳奥氏体具有较好的稳定性,其室温下的体积分数随着两相区回火温度的升高逐渐增大;当两相区回火温度高于650℃时,亚稳奥氏体的稳定性显著降低,在回火冷却过程中,部分奥氏体转变为"新鲜"马氏体,室温亚稳奥氏体体积分数随两相区回火温度升高而逐渐降低。当两相区回火温度为650℃时,钢中亚稳奥氏体具有最佳的体积分数和稳定性配合。力学测试结果表明:当两相区回火温度为650℃时,实验钢的力学性能最佳,其屈服强度为748MPa,抗拉强度为813MPa,伸长率为27.5%,-20℃和-100℃的冲击功分别为217J和117J。
[Abstract]:The effect of tempering temperature in two-phase region on the formation of metastable austenite and mechanical properties of a Mn-Mo system microalloyed steel was studied by means of X-ray diffraction (XRD), thermal expansion instrument and electron backscatter diffraction (EBSD). The results show that the metastable austenite of the experimental steel has good stability when the tempering temperature of the two-phase zone is lower than 650 鈩，
本文编号：2293192
[Abstract]:The effect of tempering temperature in two-phase region on the formation of metastable austenite and mechanical properties of a Mn-Mo system microalloyed steel was studied by means of X-ray diffraction (XRD), thermal expansion instrument and electron backscatter diffraction (EBSD). The results show that the metastable austenite of the experimental steel has good stability when the tempering temperature of the two-phase zone is lower than 650 鈩，
本文编号：2293192
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