Welding method, product and application of dissimilar metal
A technology of dissimilar metals and welding methods, used in welding/welding/cutting items, applications, welding equipment, etc., can solve the problems of over-burning and high welding process requirements, achieve low welding process requirements, reduced weld bead brittleness, mechanical The effect of improved performance
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[0030] Example 1
[0031] Such as figure 1 , figure 2 As shown, this embodiment adopts a copper tube 1 and an iron tube 2, and the copper tube 1 is sleeved on the iron tube 2 to form a weld. The wall thickness t of the copper pipe 1 is 1 mm, and the wall thickness of the iron pipe is 0.8 mm. The depth of the two sockets is ≥1.5mm. After the copper tube 1 is sleeved on the iron tube 2, the unilateral gap is 0-0.4mm. Because the expansion coefficient of copper is larger than that of iron, even if the unilateral gap is 0, once the copper tube 1 is heated, it will still be with the outer wall of the iron pipe 2. Create a gap greater than zero.
[0032] The welding adopts argon arc welding, and the welding temperature is lower than the melting temperature of iron and higher than the melting temperature of copper. In this embodiment, the welding temperature is about 1200°C. The edge of the copper tube 2 to be welded is melted as the solder to seal the weld. After cooling, a bevel is ...
Example Embodiment
[0037] Example 2
[0038] Such as image 3 , Figure 4 As shown, this embodiment uses a copper plate 4 and a stainless steel plate 5, and the edge of the copper plate 4 overlaps the edge of the stainless steel plate 5 to be welded. The thickness t of the copper plate 4 is 3 mm, and the thickness of the stainless steel plate 5 is 2 mm. The overlapping depth between the two is ≥ 1.5mm.
[0039] The welding adopts argon arc welding, and the welding temperature is lower than the melting temperature of iron and higher than the melting temperature of copper. In this embodiment, the welding temperature is about 1200°C. The edge of the copper plate 4 to be welded is melted as the solder to seal the weld. After cooling, a smooth inclined surface with a certain arc is formed. The height of the inclined surface is h=3mm. At the same time, the molten copper is also filled into the weld. The weld formed after cooling The width of the lane is> 3 mm, so that the dissimilar metal plates includi...
Example Embodiment
[0041] Example 3
[0042] When soldering, a nickel-based solder with a nickel content of more than 8% is used to melt the nickel solder and copper to form a mixture, and jointly infiltrate the iron to form a solid solution.
[0043] Others are the same as in Example 1.
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