Method for manufacturing aluminum-silicon clad layer hot forming steel tailor-welded blank through laser filler wire welding process

A hot forming steel and laser wire filling technology, which is applied in laser welding equipment, manufacturing tools, welding/welding/cutting items, etc., can solve the problems of poor removal effect, expensive equipment, low work efficiency, etc., and achieve the reduction of straight line The requirements of high degree, the effect of improving production efficiency and reducing production cost

Inactive Publication Date: 2018-06-29
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to control the selection and adjustment of the welding method, under the premise of ensuring the quality of the weld seam of the tailor welded blank, and omit the traditional process of laser

Method used

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  • Method for manufacturing aluminum-silicon clad layer hot forming steel tailor-welded blank through laser filler wire welding process
  • Method for manufacturing aluminum-silicon clad layer hot forming steel tailor-welded blank through laser filler wire welding process
  • Method for manufacturing aluminum-silicon clad layer hot forming steel tailor-welded blank through laser filler wire welding process

Examples

Experimental program
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Effect test

Embodiment 1

[0056] 22MnB5 hot-formed steel with aluminum-silicon coating 4 with a sheet thickness of 1.5mm is selected as the target material of the tailor-welded blank. The tailor-welded blank material is coated on both sides, and is divided into the first layer and the second layer from the outer layer to the inner layer And the third layer: the first layer is an Al-Si eutectic alloy layer with a thickness of 20 μm; the second layer under the first layer is an Fe-Al intermetallic compound layer with a thickness of 6-8 μm; the innermost layer The third layer is 22MnB5 steel base material 2 with a thickness of 1.45mm;

[0057] Prepare the weld joint, including adjusting the butt gap to 1.0mm, so that the straightness and shape of the shear section meet the welding requirements, and keep the weld joint clean.

[0058] Choose the welding method of laser wire-filling welding, choose nickel-based alloy welding wire with a diameter of 1.2mm, and adjust the laser power to 3kW, the welding speed...

Embodiment 2

[0061] As a comparative embodiment, the completely same sheet metal and weld joints with the same pretreatment method are selected as the target material of tailor-welded blanks.

[0062] The common laser self-fluxing welding method is selected, the laser power is also 3kW, the welding speed is increased to 5.8m / min, and Ar gas is selected as the shielding gas to complete the laser self-fluxing welding, and the second welding joint 3 can be obtained.

[0063] After undergoing exactly the same thermoforming process, the obtained welded joint structure is as follows Figure 4 As shown, the joint strength is only 1250MPa, and the fracture appearance of the joint is as follows Figure 5 .

[0064] Comparing the above two implementations, it can be seen that: when the same object material is selected (thickness and material are the same, and the form and thickness of the surface aluminum-silicon coating 4 are also exactly the same), the laser welding with filler wire and the ordin...

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Abstract

The invention discloses a method for manufacturing an aluminum-silicon clad layer hot forming steel tailor-welded blank through a laser filler wire welding process. The method comprises the steps of selecting object materials of the tailor-welded blank, selecting welding filling materials, adjusting welding process parameter and completing blank tailor welding and hot forming. According to the method, aiming at the thickness of a blank to be subjected to tailor welding, the ingredients of a base material and other characteristic parameters, welding wire ingredients are reasonably selected, thewelding process parameters are adjusted, the hot forming process is adjusted, and a weld metal microstructure matched with the strength requirement is improved and obtained. Compared with a traditional laser tailor-welded blank method (such as laser self-fusion welding), according to the method, the process step of removing an aluminum-plated silicon plate clad layer is not needed, the weld quality can be guaranteed, the steps of the technological process of the tailor-welded blank are simplified, and production efficiency is improved; and high equipment investment needed by removal of a cladlayer does not need to be additionally increased, and production cost is remarkably reduced. The method can be used for laser TIG filler wire welding and laser MIG hybrid welding processes, and has the beneficial effects of being capable of reducing the requirement for the precision of a sheet splicing clamp, improving the weld strength and the like.

Description

technical field [0001] The invention relates to the field of metal material processing, in particular to a manufacturing process of aluminum-silicon-coated thermoformed steel tailor-welded blanks. Background technique [0002] Thermoforming refers to a metal processing process that utilizes the characteristics of high-temperature softening of the sheet metal to form, and at the same time performs rapid cooling in a stamping die with cooling passages, so that the soft phase structure of the sheet material can be quickly transformed into a hard phase structure. Aluminum-silicon-coated hot-formed steel, that is, aluminum-silicon-coated hot-formed steel, is a hot-formed steel whose surface is coated with a hot-dip Al-Si coating. The aluminum-silicon-coated thermoforming steel has the advantages that the aluminum-silicon coating can inhibit the oxidation and decarburization of the tailor-welded blank during hot forming, the surface quality is good, and it can provide protection d...

Claims

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Application Information

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IPC IPC(8): B23K26/211B23K26/60B23K26/12B23K26/70B23K101/18
CPCB23K26/123B23K26/211B23K26/60B23K26/703
Inventor 林文虎华学明李芳黄晔牟刚张跃龙
Owner SHANGHAI JIAO TONG UNIV
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