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| 不锈钢与渗碳钢惯性摩擦焊接头的组织与性能 |
| Microstructure and Properties of Inertia Friction Welded Joint of Stainless Steel and Carburizing Steel |
| Received:July 19, 2017 Revised:September 10, 2017 |
| DOI：10.3969/j.issn.1674-6457.2017.05.031 |
| 中文关键词: 惯性摩擦焊 不锈钢 显微组织 显微硬度 拉伸性能 |
| 英文关键词: IFW stainless steel microstructure microhardness tensile strength |
| 基金项目: |
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| 中文摘要: |
| 目的 研究0Cr18Ni12Mo2Ti不锈钢与20CrMnMo渗碳钢的惯性摩擦焊焊接接头的组织与力学性能。方法 通过金相、能谱分析、显微硬度、拉伸试验对焊接接头进行组织与力学性能分析。结果 焊接试样上0Cr18Ni12Mo2Ti不锈钢一侧飞边尺寸比20CrMnMo渗碳钢一侧飞边小；焊接接头熔合区仅为50 μm，熔合线附近元素扩散层很窄，其中0Cr18Ni12Mo2Ti不锈钢仍为奥氏体组织，20CrMnMo钢组织由铁素体与珠光体转变为马氏体与索氏体，20CrMnMo一侧热力影响区组织为细小的片状珠光体与铁素体；焊缝区的显微硬度为358HV，高于2种母材；焊接接头抗拉强度大于590 MPa，断后伸长率大于32%，断裂位置均在0Cr18Ni12Mo2Ti不锈钢母材一侧。结论 采用惯性摩擦焊工艺可实现不锈钢与渗碳钢的高强连接。 |
| 英文摘要: |
| The paper aims to study microstructure and mechanical properties of welded joint of 0Cr18Ni12Mo2Ti stainless steel and 20CrMnMo carburizing steel by inertia friction welding (IFW). Microstructure and mechanical properties of welded joint were analyzed and tested by metallographic, EDX, microhardness and tensile experiment. The flash size on one side of 0Cr18Ni12Mo2Ti stainless steel on the welded sample was smaller than that of 20CrMnMo carburizing steel. The weld zone was only 50 μm. The elemental diffusion layer was narrow. 0Cr18Ni12Mo2Ti stainless steel was kept at austenite structure. The structure of 20CrMnMo steel transformed from ferrite and perlite to martensite and sorbite. The structure of 20CrMnMo in the heat affected area was fine lamellar pearlite and ferrite. The microhardness of the weld zone was 358 HV, which was higher than both base metals. The tensile strength of welded joint was greater than 590 MPa. The elongation after fracture was higher than 32%, and the tensile samples fractured on one side of the 0Cr18Ni12Mo2Ti stainless steel. Stainless steel and carburizing steel could be welded with high-strength by IFW. |
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