唐明华,汪新衡,赵健明

• 1:湖南工学院先进制造技术研究所
• 2:衡阳华菱钢管有限公司技术中心

摘要(Abstract)：

将25Mn V石油套管用钢通过直接淬水与水冷→空冷→水冷的双介质淬火冷却工艺分别处理成全马氏体组织与下贝氏体/马氏体复相组织,对比研究了不同淬火工艺下的微观组织特征及回火工艺参数对试验钢强韧性的影响。结果表明:双介质淬火所得下贝氏体/马氏体复相组织具有明显的强韧化效果,可以降低应力集中,有利于材料韧性的改善和阻止微裂纹的产生与扩展;力学性能测试表明,试验钢大约在400℃左右出现韧性低谷,呈现出低温回火脆性的特征,因此,该复相组织适合于在高温回火状态下使用,此时复相组织提高材料韧性的作用更为显著。

关键词(KeyWords)： 石油套管;双介质淬火;下贝氏体/马氏复相组织;强韧性

Abstract:

Keywords:

基金项目(Foundation): 湖南省自然科学衡阳联合基金(14JJ5002,13JJ9025);; 湖南省教育厅重点资助项目(12A035)

作者(Author): 唐明华,汪新衡,赵健明

DOI: 10.13289/j.issn.1009-6264.2017.04.021

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