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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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低合金调质钢在回火过程中的力学性能
Keywords: 金属材料,低合金调质钢,回火,显微组织,力学性能
Abstract:
？研究了回火温度对低合金调质钢力学性能和显微组织的影响。结果表明:淬火态为具有自回火析出物的板条马氏体,具有良好的强韧性配合；在250℃左右回火后片状碳化物析出量增加,提高了屈服强度；在400℃回火后在板条界析出碳化物薄壳,导致回火脆性现象；高温回火后板条形态仍普遍存在,局部区域的板条合并成铁素体块晶。在550℃以上回火析出大量纳米碳化物,渗碳体明显粗化。细晶强化和析出强化是实验钢的主要强化方式。在回火过程中组织演变及析出物性质直接影响拉伸曲线特征和n值。
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