Copper-steel dissimilar metal welding method

A welding method and dissimilar metal technology, applied in welding equipment, metal processing equipment, arc welding equipment, etc., can solve problems such as liquid copper thermal cracks, pores and base material grain growth, and weld quality is difficult to guarantee, to achieve Meet welding requirements, easy to operate, and prevent thermal cracks

Inactive Publication Date: 2012-06-20
烟台鲁宝有色合金有限公司
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Problems solved by technology

[0002] At present, the fillet welding structure of copper-steel dissimilar metals generally adopts cold welding and hot welding. Large thermal stress, so cracks will occur; liquid copper often penetrates i

Method used

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  • Copper-steel dissimilar metal welding method
  • Copper-steel dissimilar metal welding method
  • Copper-steel dissimilar metal welding method

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Embodiment Construction

[0010] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0011] Such as figure 1 and figure 2 As shown, a copper-steel dissimilar metal welding method, which welds the copper piece 1 and the steel piece 2 together to form a copper-steel fillet welding workpiece, first, the copper-based alloy welding material is heated and welded on one side of the copper piece 1, A copper-based alloy transition layer is formed on the welding surface of the copper piece 1. After the copper piece 1 is cooled and the weld seam 3 is trimmed, the steel piece 2 is assembled on the copper piece 1 for spot welding, and finally the copper-based alloy transition layer is welded with a copper-based electrode. Welded together with the steel piece 2, the welding method is gas shielded welding in a cold state, and the gas shielded welding is carbon dioxide shielded welding or argon shielded welding.

[0012] Finally, it should be noted that the above...

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Abstract

The invention discloses a copper-steel dissimilar metal welding method. A copper part and a steel part are welded together to form a copper-steel corner welding workpiece. The copper-steel dissimilar metal welding method comprises the following steps: firstly, a surfacing copper based alloy welding material is heated on one side of the copper part so as to form a copper based alloy transition layer on the welding surface of the copper part, secondly, assembling the steel part on the copper part to perform spot welding after cooling the copper part and trimming weld joints, and finally adopting a copper based welding rod to weld the copper based alloy transition layer and the steel part together, wherein the welding method is gas shield welding in a cold state. The copper-steel dissimilar metal welding method adopts a surfacing copper based alloy transition layer in a hot state so as to enable the copper based alloy welding material to be combined with the copper part well, then the copper-steel corner welding is performed in the cold state which is convenient to operate, and penetration ratio of weld metal can be controlled effectively, thereby preventing weld joint hot crack from being produced and meeting the welding requirements.

Description

technical field [0001] The invention relates to a welding process, in particular to a copper-steel dissimilar metal welding method. Background technique [0002] At present, the fillet welding structure of copper-steel dissimilar metals generally adopts cold welding and hot welding. Large thermal stress, so cracks will occur; liquid copper often penetrates into the steel grains in the fusion zone on the steel side, resulting in the formation of thermal cracks, especially in products with large workpieces and small welding spaces. Quality is difficult to guarantee. How to provide a copper-steel dissimilar metal welding method that is easy to operate and meets welding requirements has become an urgent need for people. Contents of the invention [0003] The purpose of the present invention is to overcome the limitation of the prior art that the conventional welding method is difficult to meet the welding requirements due to the limitation of the welding seam structure of th...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23K9/16B23K9/23
Inventor 宫晓华孙秉通祁学平刘宁李广东辛江美姜全高春鹰王福兴宇智敏侯玉龙
Owner 烟台鲁宝有色合金有限公司
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