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| Super-Ni/NiCr叠层复合材料与18-8钢的焊接性 | |
| 引用本文： | 李亚江,夏春智,PuchkovUA,王娟.Super-Ni/NiCr叠层复合材料与18-8钢的焊接性[J].焊接学报,2010,31(2):13-16. |
| 作者姓名： | 李亚江 夏春智 PuchkovUA 王娟 |
| 作者单位： | 1. 山东大学,材料液固结构演变与加工教育部重点实验室,济南,250061;国立莫斯科鲍曼技术大学,材料科学系,俄罗斯,莫斯科,105005 2. 山东大学,材料液固结构演变与加工教育部重点实验室,济南,250061 3. 国立莫斯科鲍曼技术大学,材料科学系,俄罗斯,莫斯科,105005 |
| 基金项目： | 国家自然科学基会资助项目，高等学校博士学科点专项科研基金 |
| 摘 要： | 采用填丝钨极氩弧焊(TIG)方法对复层厚度仅0.3mm的叠层复合材料与18-8不锈钢进行焊接.通过显微图像分析仪、电子探针(EPMA)和X射线衍射仪(XRD)等对焊缝微观组织、显微硬度和熔合区附近相组成等进行分析.试验发现,焊缝边缘处的奥氏体晶粒生长具有方向性,呈柱状晶形态垂直于熔合区生长;叠层复合材料NiCr基层与焊缝形成可靠的熔合,Super-Ni复层与焊缝过渡区显微硬度升高;18-8钢侧焊缝显微硬度低于不锈钢母材.结果表明,焊接区主要是奥氏体、少量δ铁素体、γ-Ni(Cr,Fe),FeNi等物相;焊接中应使钨极氩弧偏向18-8钢一侧,以避免镍复层过度烧损. |
| 关 键 词： | 叠层复合材料 异种材料 焊接 组织结构 钨极氩弧焊 |
| 收稿时间： | 2009/8/30 0:00:00 |
Weldability of super-Ni/NiCr laminated composite and 18-8 stainless steel |
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| LI Yajiang,XIA Chunzhi,U A PUCHKOV and WANG Juan.Weldability of super-Ni/NiCr laminated composite and 18-8 stainless steel[J].Transactions of The China Welding Institution,2010,31(2):13-16. | |
| Authors: | LI Yajiang XIA Chunzhi U A PUCHKOV and WANG Juan |
| Affiliation: | Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China;Materials Science Department, Bauman Moscow State Technical University, Moscow 105005, Russia,Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China,Materials Science Department, Bauman Moscow State Technical University, Moscow 105005, Russia and Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China |
| Abstract: | Super-Ni laminated composite and 18-8 stainless steel were welded together by tungsten inert gas arc welding with filler metal.Microstructure,microhardness and phase constitution near the fusion was analyzed by means of micro-image analyzer,electron probe micro-analyzer and X-ray diffraction.Experimental results indicated that the columnar austenite grains at the weld edge grew with directionality,which were perpendicular to the fusion zone.A reliable fusion zone was formed between the NiCr base layer and the welded metal.Microharduess near the super-Ni cover layer increased,while the microhardness of welded metal near the 18-8 steel was lower than that of the 18-8 base metal.The welded metal mainly consisted of austenite,a little δ ferrite,γ-Ni(Cr,Fe)and FeNi.The tungsten arc in the welding should be controlled towards the 18-8 steel side to avoid the excessive molten lose of super-Ni cover layer. |
| Keywords: | laminated composite dissimilar material welding microstructure tungsten inert gas arc welding |
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