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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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mo对nb--mo--v微合金化钢中碳化物析出的影响
Keywords: 金属材料,微合金钢,三维原子探针,碳化物,钼,回火
Abstract:
？将两种mo含量不同的nb--mo--v微合金钢在1200℃固溶0.5h后淬火,然后在450--650℃间不同温度回火4h,研究mo含量对其在回火过程中组织变化和碳化物形成的影响。结果表明：低mo含量微合金钢样品的硬度峰值出现在550℃回火,高mo含量的出现在600℃回火；在650℃回火后,高mo含量样品中碳化物颗粒尺寸比低mo含量的小。其原因是,mo偏聚在碳化物外层抑制了nb、v从铁素体基体扩散进入碳化物,并降低了基体中c和合金元素向碳化物扩散的速率,从而抑制了碳化物颗粒长大。
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