李方,何钦生,尉文超,王建桥,高怡,张十庆,王宏,邹兴政,赵振,唐远寿,郎春雷

• 1:重庆材料研究院有限公司
• 2:国家仪表功能材料工程技术研究中心
• 3:高性能耐腐蚀合金重庆市重点实验室
• 4:钢铁研究总院有限公司

摘要(Abstract)：

为了研究亚稳奥氏体不锈钢在冷拉拔及低温回火过程中的组织性能演变规律，尤其是低温回火处理对其弹性极限的影响，以直径为?0.3 mm的06Cr19Ni10亚稳奥氏体不锈弹簧钢丝为研究对象，采用光学显微镜、电子背散射衍射、X射线衍射仪、扫描电镜、室温拉伸实验和显微硬度仪等研究了冷拉拔及低温回火过程中其马氏体相变行为及力学性能的变化。结果表明：91%减面率的冷拉拔加工使06Cr19Ni10钢丝的晶粒尺寸显著细化，获得了80.94%马氏体+19.06%残留奥氏体的组织结构，其抗拉强度和弹性极限分别为2093和1315 MPa;冷拉拔加工使α′马氏体和残留奥氏体中分别形成平行于拉拔方向的<101>丝织构和<111>丝织构，但并未导致06Cr19Ni10钢丝硬度的各向异性；对91%减面率的冷拉态钢丝进行380℃低温回火处理，可使马氏体含量提高至98.18%,弹性极限大幅度提高至1903 MPa,且其室温拉伸断口形貌呈韧性断裂特征，仍具有良好的韧塑性。

关键词(KeyWords)： 奥氏体不锈钢;形变诱发马氏体;低温回火;弹性极限;弹簧钢丝

Abstract:

Keywords:

基金项目(Foundation): 国机研究院青年科研基金项目(SINOMAST-QNJJ-2022-03);; 重庆英才·创新领军人才项目(cstc2022ycjh-bgzxm0217)

作者(Author): 李方,何钦生,尉文超,王建桥,高怡,张十庆,王宏,邹兴政,赵振,唐远寿,郎春雷

DOI: 10.13289/j.issn.1009-6264.2024-0277

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