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双面超薄不锈钢复合板焊接性的研究

Study on the Weldability of Clad Plate with Double Ultra-thiu Stainless Steel

【作者】 张俊旺

【导师】 王文先; 王保东;

【作者基本信息】 太原理工大学 , 材料加工工程, 2006, 硕士

【摘要】 双面不锈钢复合板由于既具有不锈钢优良的抗腐蚀性能,又具有基层碳钢经济性、高强度的优点,已被越来越多的应用在石油、化工、轻工等行业中,以代替纯不锈钢板。既可节约大量的昂贵金属Cr、Ni,又可大幅度降低制造成本。双面超薄不锈钢复合板(覆层厚度≤0.5mm)是最新生产出的薄层不锈钢复合板,解决其焊接工艺,使焊接接头达到同覆层相同或相近的抗腐蚀性能,对于双面超薄不锈钢复合板的应用及推广具有十分重要的意义。 本文首先分析焊接工艺对SUS316奥氏体不锈钢焊接接头腐蚀性能的影响,在此基础上采用钨极氩弧焊(TIG)、熔化极氩弧焊(MIG)、钨极氩弧焊加填丝焊(TIG+M)和微束等离子弧焊接了(0.25+3+0.25)mm的双面超薄不锈钢复合板,分析各种焊接工艺条件下,焊接接头的合金元素分布、显微组织、抗腐蚀性能及力学性能变化。 TIG、MIG和TIG+M焊接SUS316不锈钢板的焊接接头腐蚀性能分析表明:TIG+M和MIG焊接接头抗晶间腐蚀性能好,TIG焊接接头抗晶间腐蚀性能较差,其抗晶间腐蚀性能大小顺序为:母材>TIG+M>MIG>TIG;三种焊接工艺方法下,焊接接头在9.8%的硫酸溶液抗腐蚀性能大小顺序为:母材>TIG+M>MIG>TIG;在5%的盐酸溶液中的抗腐蚀性能为:母材>TIG>TIG+M>MIG。 对比激光焊接双面超薄不锈钢复合板的焊接接头性能表明:激光焊接超薄不锈钢复合板时,焊接接头热影响区及焊缝尺寸细小、成型良好,焊接接头力学性能优异,但基层碳钢对覆层合金元素的稀释率较大,焊缝区Cr含量在6%~7%,Ni含量在2%~3.5%,不能满足抗腐蚀性能的成

【Abstract】 The clad plate with double ultra-thin stainless steel, due to its good corrosion resistance, low cost and high intensity, which had made it is widely used in oil, chemical and light industry to replace pure stainless steel. Lots of expensive metal elements can be saved by use of stainless steel clad plate, it can also cut down the production cost, all of this make it has a lot of advantages. With reducing of thickness, the clad plate’s welding technologies have become more and more difficult for engineers, and have been paid close attention by welding experts from home and abroad. So, solving the welding technologies and making it has very close corrosion resistance, will be useful for the application and popularization of clad plate with double ultra-thin stainless steel.The technological factors to the corrosion resistance of SUS316 stainless steel welded joints were studied in this paper. Besides, TIG, MIG, TIG+M, stuffing with wire and micro-beam plasma arc were used to weld the clad plate with ultra-thin stainless steel. Chemical distribution, microstructure, corrosion resistance and mechanical properties were also be analyzed in welding joints of different welding conditions.Compared with TIG, MIG and TIG+M, welded joints of TIG+M and MIG have better corrosion resistance than that of TIG. It have been indicated that raw material > TIG+M > MIG > TIG in inter-crystalline corrosion resistance and 9.8% H2SO4 solution; TIG > TIG+M > MIG > in 5% hydrochloric acid.Low distortion, good mechanical properties and small size in welding bead can be achieved by laser beam welding, but basal carbon steel has a

  • 【分类号】TG406
  • 【被引频次】17
  • 【下载频次】853
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