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Friction stir welding method for ultra high strength steel and aluminum alloy

A technology of friction stir welding and ultra-high-strength steel, which is applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., and can solve problems such as the wear and tear of the stirring head and the connection between ultra-high-strength steel and aluminum alloy.

Inactive Publication Date: 2020-09-18
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a friction stir welding method of ultra-high strength steel and aluminum alloy, which reduces the problems of serious wear of the stirring head and difficulty in realizing the connection of ultra-high strength steel and aluminum alloy in the prior art

Method used

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  • Friction stir welding method for ultra high strength steel and aluminum alloy
  • Friction stir welding method for ultra high strength steel and aluminum alloy

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Embodiment 1

[0037] see figure 1 and 2 , the invention provides a method for friction stir welding of ultra-high-strength steel and aluminum alloy, said method comprising the steps of:

[0038] A temperature sensor 4 is installed on the upper surface of the first workbench 2;

[0039] Select the part to be connected on the ultra-high-strength steel plate 1, place the ultra-high-strength steel plate 1 on the first workbench 2, and the lower surface of the part to be connected is in contact with the temperature sensor 4;

[0040] Turn on the laser 3 to irradiate the upper surface of the part to be connected, and make relative motion between the ultra-high-strength steel plate 1 and the laser 3 at a speed V1;

[0041] Adjust the energy of the laser 3 so that the temperature detected by the temperature sensor 4 reaches 800°C, and a softening zone 5 is formed at the part to be connected;

[0042] Place the ultra-high-strength steel plate 1 on the second workbench 8, place the aluminum alloy ...

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Abstract

The invention provides a friction stir welding method for ultra-high strength steel and aluminum alloy. Through laser heat treatment, a softened zone is formed at the part to be connected, so that local strength of the ultra-high strength steel is reduced. And wear of the stirring head is reduced during the subsequent friction stir welding process. The speed of friction stir welding is enhanced, and the friction stir welding of ultra-high strength steel and aluminum alloy is achieved.

Description

technical field [0001] The invention belongs to the field of connection of dissimilar materials, and in particular relates to a friction stir welding method of ultra-high-strength steel and aluminum alloy. Background technique [0002] In order to meet the needs of lightweight vehicles, the automotive industry has an increasing demand for lightweight materials such as ultra-high-strength steel and aluminum alloys. At present, the strength of cold-formed parts has reached 1200MPa, and the strength of hot-formed parts has reached 2000MPa, and there is still room for further improvement. [0003] In 1991, the British Welding Institute invented the friction stir welding technology. Friction stir welding technology refers to the use of heat generated by the friction between the high-speed rotating stirring head and the workpiece to locally melt the material to be welded. When the stirring head moves forward along the welding interface, the plasticized material acts on the rotati...

Claims

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Application Information

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IPC IPC(8): B23K20/12B23K20/227B23K20/24C21D1/34C21D9/00B23K103/20
CPCB23K20/122B23K20/2275B23K20/24C21D1/34C21D9/0081B23K2103/20
Inventor 张永强鞠建斌付参王鹏博伊日贵
Owner SHOUGANG CORPORATION