X70管线钢显微组织对室温蠕变性能的影响
聂德福,张慧星,赵杰
摘要(Abstract):
研究不同显微组织的X70管线钢的室温蠕变现象和室温蠕变对常温拉伸性能的影响。结果表明,在各种保载应力水平下,不同显微组织的X70管线钢都存在室温蠕变现象。当保载应力高于屈服强度时,室温蠕变变形更加明显。在保载应力与屈服强度之比相同的情况下,不同热处理状态的X70管线钢的室温蠕变量差别不大。同时发现当保载应力高于屈服强度时,室温蠕变后材料屈服点的流变应力显著提高。
关键词(KeyWords): X70管线钢;室温蠕变;屈服强度;流变应力
基金项目(Foundation): 国家自然科学基金资助项目(50271013)(NSFCProjectNo.50271013)
作者(Author): 聂德福,张慧星,赵杰
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