A kind of laser welding method
A laser welding and laser beam technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve problems affecting welding quality, carbon content precipitation, etc.
Active Publication Date: 2021-05-07
SHANGHAI HITACHI ELECTRICAL APPLIANCES CO LTD
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Problems solved by technology
[0003] For the welding between parts of two different materials (mainly referring to different carbon content), the applicant found that if the conventional laser welding method is adopted, when the laser spot hits the parts with lower carbon content, the laser welding The quality is better, but when the laser spot hits the parts with high carbon content, it is easy to cause the precipitation of carbon content and affect the welding quality
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[0030] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals denote the same or similar structures in the drawings, and thus their repeated descriptions will be omitted.
[0031] The laser welding method of the present invention is used for welding parts with different carbon contents, referring to figure 1 As shown, a first part 1 and a second part 2 are included, the first part 1 having a lower carbon content than the second part 2 . For parts of two different materials, different carbon content is a relative concept. For example, when the two parts are cast iron and carbon steel, the car...
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Abstract
The present invention provides a laser welding method for welding parts with different carbon contents, including a first part and a second part, the carbon content of the first part is lower than that of the second part, and the second part A component and the second component have a joint surface that cooperates with each other, and at least a part of the edge of the joint surface is irradiated with a laser beam, and the first component and the second component are welded on at least a part of the edge of the joint surface The weld seam; the molten pool volume of the weld seam located in the first part is larger than the molten pool volume of the weld seam located in the second part. The invention controls the molten pool volume of the laser welded seam located in parts with different carbon contents, so that the formed weld seam has high quality and high strength, and the welding process is not easy to generate pores, and the welding is uniform.
Description
technical field [0001] The invention relates to the field of welding technology, in particular to a laser welding method for welding parts with different carbon contents. Background technique [0002] Laser welding has attracted wide attention due to its high energy density and small heat-affected zone. This excellent welding method is widely used in many technical fields, such as the compressor industry. It is used for welding some welding performance is poor materials, such as cast iron, etc. The mechanical properties of cast iron are low in strength and basically non-plastic, and cracks are prone to occur in ordinary welding methods. Laser welding has a high energy density and a small area affected by thermal deformation, so it can reduce thermal deformation and avoid cracks. [0003] For the welding between parts of two different materials (mainly referring to different carbon content), the applicant found that if the conventional laser welding method is adopted, when t...
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IPC IPC(8): B23K26/00B23K26/21
CPCB23K26/0006B23K26/21
Inventor 黄波赵凤荣汤轶群
Owner SHANGHAI HITACHI ELECTRICAL APPLIANCES CO LTD