压力容器用不锈钢复合板焊接性能研究
发布时间：2019-05-11 18:25
【摘要】：不锈钢复合钢板具有强度高、耐腐蚀、耐磨损、寿命长等性能,在石油化工等各个领域中替代奥氏体不锈钢被广泛应用,特别是用于压力容器制造。但是,不锈钢复合钢板存在着复合层厚度不均匀的现象,加工坡口剥离复合层时,易产生复合层剥离不干净的现象,在焊接基层时,会将残余在基层上的不锈钢熔化,导致焊缝中的合金元素增加,焊缝变得硬而脆,容易产生裂纹。因此,对不锈钢复合钢板焊接性能研究具有一定的工程应用价值。 本文对复合钢板焊接工艺及技术的国内外发展动态进行了综述；对不同合金元素和组织状态对材料的焊接性能、使用性能的影响进行了分析和总结。通过对不锈钢复合钢板的焊接特性进行理论分析并结合现场试验结果,提出一些适用于常用不锈钢复合钢板的焊接工艺。论文研究结果表明,在不锈钢中加入稳定化元素,焊接时,可先于铬形成碳化物,从而保证焊接接头的耐蚀性；在焊接不锈钢复合板过渡层时,要使用铬、镍含量较高的焊接材料来提高抗裂性,保证焊接质量。
[Abstract]:Stainless steel composite steel plate has many properties, such as high strength, corrosion resistance, wear resistance, long life and so on. It is widely used to replace Austenite stainless steel in petrochemical and other fields, especially in the manufacture of pressure vessels. However, there is a phenomenon of uneven thickness of composite layer in stainless steel composite steel plate. When machining groove peeling composite layer, it is easy to produce the phenomenon that composite layer peeling is not clean. When welding base, stainless steel residual on base layer will be melted. Resulting in the increase of alloy elements in the weld, the weld becomes hard and brittle, easy to crack. Therefore, the study of welding performance of stainless steel composite steel plate has certain engineering application value. In this paper, the development of welding technology and technology of composite steel plate at home and abroad is reviewed, and the effects of different alloy elements and microstructure on the welding properties and service properties of composite steel plate are analyzed and summarized. Based on the theoretical analysis of the welding characteristics of stainless steel composite steel plates and the results of field tests, some welding processes suitable for common stainless steel composite steel plates are put forward. The results show that when stabilizing elements are added to stainless steel, carbides can be formed first from chromium, so as to ensure the corrosion resistance of welded joints. When welding the transition layer of stainless steel composite plate, the welding material with high content of chromium and nickel should be used to improve the crack resistance and ensure the welding quality.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH49;TG142.71
本文编号：2474744
[Abstract]:Stainless steel composite steel plate has many properties, such as high strength, corrosion resistance, wear resistance, long life and so on. It is widely used to replace Austenite stainless steel in petrochemical and other fields, especially in the manufacture of pressure vessels. However, there is a phenomenon of uneven thickness of composite layer in stainless steel composite steel plate. When machining groove peeling composite layer, it is easy to produce the phenomenon that composite layer peeling is not clean. When welding base, stainless steel residual on base layer will be melted. Resulting in the increase of alloy elements in the weld, the weld becomes hard and brittle, easy to crack. Therefore, the study of welding performance of stainless steel composite steel plate has certain engineering application value. In this paper, the development of welding technology and technology of composite steel plate at home and abroad is reviewed, and the effects of different alloy elements and microstructure on the welding properties and service properties of composite steel plate are analyzed and summarized. Based on the theoretical analysis of the welding characteristics of stainless steel composite steel plates and the results of field tests, some welding processes suitable for common stainless steel composite steel plates are put forward. The results show that when stabilizing elements are added to stainless steel, carbides can be formed first from chromium, so as to ensure the corrosion resistance of welded joints. When welding the transition layer of stainless steel composite plate, the welding material with high content of chromium and nickel should be used to improve the crack resistance and ensure the welding quality.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH49;TG142.71
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