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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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x100级管线钢的组织和强韧性
Keywords: 金属材料,x100管线钢,微观组织,粒状贝氏体,ebsd,强韧性
Abstract:
？用光学显微镜、扫描电镜、透射电镜和ebsd等方法研究了x100管线钢热连轧钢带的微观组织、析出物、晶粒尺寸等对x100管线钢强韧性的影响。结果表明,通过合理的成分设计和tmcp工艺得到的x100管线钢的平均有效晶粒尺寸约为2.38？μm,晶内含有大量位错和亚结构；显微组织由粒状贝氏体、板条贝氏体和m/a岛组成,组织中粒状贝氏体含量较多,板条贝氏体含量较少,m/a岛尺寸较小,弥散分布；细小的第二相能有效钉扎位错的移动,产生沉淀强化效果；实验钢的抗拉强度高于970mpa,屈服强度高于800mpa,-40℃以上的charpy冲击功大于250j,韧脆转变温度在-40℃与-60℃之间。
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