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A flux and process for laser welding thermoformed steel

A technology of hot forming steel and laser welding, which is applied in the direction of welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problems of damaging other properties of products, and achieve improved weldability, increased plasticity and toughness, and less environmental pollution Effect

Active Publication Date: 2021-06-11
佛山三友汽车部件制造有限公司
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  • Application Information

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Problems solved by technology

Therefore, the application of a technology cannot solve a certain problem without compromising other performances of the product

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  • A flux and process for laser welding thermoformed steel
  • A flux and process for laser welding thermoformed steel
  • A flux and process for laser welding thermoformed steel

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Embodiment Construction

[0024] The method of the present invention is further specifically described by the examples given below.

[0025] A kind of flux and process for laser welding of hot-formed steel coated with Al-Si coating on the surface of the present invention, by using molten salt and metal oxide as flux, coating removal and laser welding are implemented simultaneously, melting The physical and chemical reaction of the molten salt and metal oxide with the Al-Si coating on the surface of the hot-formed steel sheet in the metallurgical process improves the weldability of the hot-formed steel coated with the Al-Si coating and reduces the Al in the laser welding process. - After the Si coating is melted, the Al element dissolves or penetrates into the weld seam and Fe element to form a Fe-Al intermetallic compound, the microhardness of the weld seam area is significantly reduced, and the plasticity and toughness are improved, so as to improve the mechanical properties of the laser tailor welded ...

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Abstract

The invention discloses a flux and a process for laser welding of hot-formed steel coated with Al-Si coating on the surface, belonging to the technical field of welding and connection. Using molten salt and metal oxide as flux, by mass percentage (Wt / %): silicon dioxide (SiO 2 ) 15-20%, manganese oxide (MnO) 20-30%, iron oxide (FeO) 10-15%, calcium fluoride (CaF 2 ) 5‑10%, cryolite (Na 3 AlF 6 )margin. The adhesive is pre-applied to the Al-Si-coated hot-formed steel tailor-welded welds, and then the flux is adhered to the adhesive-coated surface of the welded joint for welding. Under the same technical parameters, the hot-formed steel coated with Al-Si coating is welded with flux after welding, which improves the mechanical properties of the joints, reduces the microhardness of the weld zone, the microhardness value (HV) is 472-513, and the joint elongation The rate was 1.6%-2.2%.

Description

technical field [0001] The invention relates to a flux and a process for laser welding of hot-formed steel coated with an Al-Si coating on the surface, through the use of molten salt and metal oxides as flux and Al-Si coating on the surface of a thermo-formed steel plate for metallurgy The physical and chemical reaction of the process can reduce the dissolution or infiltration of Al elements into the weld seam and Fe elements to form Fe-Al intermetallic compounds after the Al-Si coating is melted during the laser welding process, so as to improve the mechanical properties of laser welded joints, which belongs to welding and connection technology field. Background technique [0002] Hot-formed steel is an ultra-high-strength steel that takes into account lightweight, safety requirements and production costs. Thermoforming steel adopts thermoforming technology. The plate has the characteristics of good plasticity, strong forming ability and small springback at high temperatur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/36B23K35/30B23K35/40
CPCB23K35/3026B23K35/3605B23K35/404
Inventor 邱小明黄伟宸邢飞徐宇欣阮野
Owner 佛山三友汽车部件制造有限公司
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