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Laser welding method for dissimilar metals

A laser welding, dissimilar metal technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of poor welding surface effect, perforation, spatter, etc.

Inactive Publication Date: 2011-10-12
HANS LASER TECH IND GRP CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Since the boiling point of zinc alloy is much lower than the melting point of stainless steel, spatter and perforation are likely to occur during penetration stitch welding (please refer to figure 1 ), resulting in the phenomenon that the welding joint area between the zinc alloy material workpiece and the stainless steel material workpiece is too small, the strength is too low, and the surface effect of the welding is also very poor.

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  • Laser welding method for dissimilar metals

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Embodiment Construction

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] A laser welding method for dissimilar metals is provided to achieve welding between high melting point metal workpieces and low melting point metal workpieces, and between stainless steel workpieces with higher melting and boiling points and zinc alloy workpieces with lower melting and boiling points welding as an example. Specifically, a gap is set between the stainless steel workpiece and the zinc alloy workpiece, and a laser beam is irradiated from one side of the stainless steel workpiece to one side of the zinc alloy workpiece to realize welding. The g...

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Abstract

The invention discloses a laser welding method for dissimilar metals, which is used for welding a high-melting-point metal workpiece and a low-melting-point metal workpiece. A gap is formed between the high-melting-point metal workpiece and the low-melting-point metal workpiece, and a laser beam irradiates from one side of the high-melting-point metal workpiece to one side of the low-melting-point metal workpiece to realize welding, so that low-melting-point metal vapor is easily volatilized, a combining part between the two workpieces is more uniformly and controllably heated, heat is more reasonably distributed, and the phenomena of splashing, perforating and the like can be avoided.

Description

technical field [0001] The invention relates to the technical field of laser welding, and more specifically relates to a laser welding method for dissimilar metals. Background technique [0002] Welding of dissimilar metals is an important problem in the field of welding technology. Due to the significant differences in physical and chemical properties of dissimilar metals, the welding process is much more complicated than that of the same metals, and the welding quality is difficult to guarantee. [0003] Take the welding between zinc alloy workpieces and stainless steel workpieces as an example, since the melting point of zinc is 419.5°C and boiling point is 907°C, while the melting point of iron is 1535°C and boiling point is 2750°C, the melting point and boiling point of the two are different So much so that even the boiling point of zinc is much lower than the melting point of iron. When welding, the laser beam needs to be shot from one side of the stainless steel work...

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Application Information

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IPC IPC(8): B23K26/20B23K26/42B23K26/32B23K26/21B23K26/323B23K26/70
Inventor 高云峰肖华朱宝华
Owner HANS LASER TECH IND GRP CO LTD
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