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OALib Journal期刊
ISSN: 2333-9721
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卷取温度对大变形(b+m/a)x80管线钢组织和性能的影响*
Keywords: 金属材料,(b+m/a)x80大变形管线钢,卷取连续配分,卷取温度,组织性能
Abstract:
？通过卷取连续hop(heatingon-linepartitioning)技术,使x80管线钢获取了(b+m/a)复相组织和大变形性能。采用力学性能测试、显微分析和x射线衍射方法研究了在不同卷取温度条件下(b+m/a)x80管线钢的组织演变规律,分析了显微组织对其力学性能的影响。结果表明,随着卷取温度的升高,贝氏体的含量和位错密度减小,残余奥氏体含量增加,导致材料强度降低和塑性增加。在高的卷取温度条件下,碳化物的析出和残余奥氏体的分解是材料强度增加和塑性减小的显微组织因素。在一定卷取温度下,实验钢有低的屈强比、高的均匀伸长率和和高的形变强化指数,符合大变形管线钢的技术要求。
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