高碳马氏体不锈钢M390与奥氏体不锈钢304闪光对焊的微观组织及力学性能 |
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引用本文: | 曹睿,乔丽学,车洪艳,李晌,王铁军,董浩.高碳马氏体不锈钢M390与奥氏体不锈钢304闪光对焊的微观组织及力学性能[J].焊接学报,2022,43(2):27-33. |
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作者姓名: | 曹睿 乔丽学 车洪艳 李晌 王铁军 董浩 |
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作者单位: | 1.兰州理工大学, 有色金属先进加工与再利用省部共建国家重点实验室, 兰州, 7300501 |
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基金项目: | 国家自然科学基金资助项目(52175325,51961024,52071170); |
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摘 要: | 通过闪光对焊方法连接M390高碳马氏体不锈钢与304奥氏体不锈钢.通过室温拉伸试验、显微硬度测试表征了焊接接头的力学性能.采用扫描电镜(SEM)、能谱分析(EDS)和X射线衍射(XRD)分析了焊接接头的微观组织形貌、元素扩散及各区域相组成.结果表明,利用合适的焊接工艺参数,M390与304之间可以形成焊缝形貌美观、抗拉...
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关 键 词: | M390高碳马氏体不锈钢 闪光对焊 微观组织 力学性能 |
收稿时间: | 2021-06-16 |
Microstructure and mechanical properties of flash butt welding high carbon martensitic stainless steel M390 and austenitic stainless steel 304 |
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Affiliation: | 1.The State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou , 730050, China2.Advanced Technology & Materials Co., Ltd., China Iron & Steel Research Institute Group, Beijing , 100081, China3.Engineering and Technology Research Center of Hot Isostatic Pressing, Zhuozhou, 072750, China4.Bahuan Technology Group Co., Ltd., Taizhou, 318054, China |
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Abstract: | The weldability of M390 high carbon martensitic stainless steel and 304 austenitic stainless steel has been investigated by flash butt welding method. Firstly, the mechanical properties of the welded joint utilize the room temperature tensile experiment, the microhardness test is characterized. At the same time, scanning electron microscope(SEM), Energy Dispersive Spectroscopy(EDS) and X-ray diffraction(XRD) were used to analyze the microstructure morphology, element diffusion and phase composition of each region of the welded joint. The experimental results show that by appropriate welding parameters, M390 and 304 can form a macroscopically beautiful weld, the maximum tensile strength is 480.62 MPa, and the elongation is 6.2%. The weld metal is composed of martensite, austenite, M23C6 and M7C3. The type of carbide on M390 side and in weld metal is (Cr, V) carbide. Different positions of M390 heat-affected zone are affected by different heat input, resulting in different aggregation and growth of carbides in different positions of M390 heat-affected zone. The carbides in the coarse-grained heat-affected zone of M390 aggregate and grow, and new carbides are continuously precipitated, the carbides exist in two types of morphologies: elongated and granular. The carbides in the fine-grained region are small in size and granular in morphology. The welded joint is brittle fracture, and the fracture position is in the weld metal, which is related to the weld metal structure and the diffusion of elements in the welded joint. |
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