Welding method for butt joint of T2 red copper and S32168 stainless steel pipes

• Main Authors: XU PENGCHENG, DU SHANSHAN, MA XIAOGUANG, WANG XIAOFENG, WANG YUE, LI ZHILING, LI ZAIPENG, YE XINGLONG, WANG YONG, LUO NIANDONG
• Format: Patent
• Language: Chinese; English
• Published: 05.01.2021
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The invention relates to the technical field of fusion welding of dissimilar materials, in particular to a welding method for butt joint of T2 red copper and S32168 stainless steel pipes. The method comprises the following steps: (1) carrying out pretreatment; (2) carrying out flaring and butting to form a welding joint; (3) preheating the welding joint; and (4) uniformly heating the welding jointto a brazing temperature, and adding brazing filler metal containing Ag, Cu, Ni and Li until a brazing seam is filled to form a welding seam. The method has the advantages of being high in operationreliability and high in welding yield, and the purpose of high-quality and efficient connection between the T2 red copper pipe and the S32168 stainless steel pipe can be realized easily, convenientlyand rapidly. 本发明涉及异种材料熔化焊接技术领域，具体涉及一种T2紫铜与S32168不锈钢管管对接的焊接方法。本包括以下步骤：1)、预处理；2)、扩口并对接，以形成焊接接头；3)、对焊接接头进行预加热；4)、对焊接接头均匀加热至钎焊温度，添加含Ag、Cu、Ni、Li的钎料，直至将钎缝填满，形成焊缝。本发明具备操作可靠性高及焊接成品率高的优点，可简便而快捷的实现T2紫铜管与S32168不锈钢管之间的优质、高效连接目的。