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Friction deformation-triggered self-propagating assistant aluminum/steel friction stirring overlapping method

A friction stir, self-propagating technology, used in aluminothermic welding equipment, welding/welding/cutting items, welding equipment, etc., can solve problems such as welding tool wear, reduce wear, improve joint performance, and increase effective lap area Effect

Active Publication Date: 2016-09-21
安徽万宇机械设备科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the welding tool wears seriously due to the impalement of the stirring needle into the steel plate when the existing light aluminum / steel dissimilar materials are welded by friction stir, the present invention proposes a friction deformation triggering self-propagating auxiliary aluminum / steel friction stir lapping method

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specific Embodiment approach 1

[0019] Specific implementation mode one: combine figure 1 and figure 2 Describe this implementation mode, this implementation mode is realized through the following steps:

[0020] Step 1. Determine the overlapping area of ​​the joint between the steel plate 1 and the aluminum plate 2, and open a square groove 1-1 at the center line of the overlapping part on the steel plate 1;

[0021] Step 2: Clean up the contact surface of the steel plate 1 and the aluminum plate 2 to be welded and the surrounding area of ​​20 mm to 30 mm, and remove the oxides on the surface of the steel plate 1 and the aluminum plate 2;

[0022] Step 3, using an organic solvent to wipe the surfaces of the mechanically treated steel plate 1 and aluminum plate 2 to remove oil, dust and other sundries;

[0023] Step 4, evenly filling the square tank 1-1 with a certain proportion of the mixture 3 of powdered Fe2O3, aluminum powder and powdered gunpowder;

[0024] Step 5. Combine the processed steel plate ...

specific Embodiment approach 2

[0026] Specific implementation mode two: combination figure 1 To describe this embodiment, in this embodiment, the steel plate 1 in step 1 is ordinary low-carbon steel or low-alloy steel, and the aluminum plate 2 is pure aluminum or aluminum alloy. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0027] Specific implementation mode three: combination figure 1 Describe this embodiment. In this embodiment, the groove depth of the square groove 1 - 1 in step 1 is 0.1 mm to 0.3 mm, and the groove width is 1 mm to 2 mm larger than the diameter of the stirring pin 4 . Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a friction deformation-triggered self-propagating assistant aluminum / steel friction stirring overlapping method which is capable of solving the problem that severe abrasion to a soldering set is caused when a stirring needle is inserted into a steel plate during light aluminum / steel dissimilar material friction stirring overlapping in the prior art. The friction deformation-triggered self-propagating assistant aluminum / steel friction stirring overlapping method comprises the following steps: 1, forming a square groove in a central line of an overlapping part on the steel plate 1; 2, cleaning up the contact surfaces and the peripheries of the steel plate to be welded and an aluminum plate to be welded; 3, wiping the surfaces of the steel plate and the aluminum plate with an organic solvent; 4, filling the square groove with a mixture; 5, combining and clamping the aluminum plate and the steel plate in such an overlapping manner that the aluminum plate is above the steel plate; and 6, performing friction stirring welding on the steel plate and the aluminum plate, wherein the shaft shoulder of a stirring head rubs with the aluminum plate, heat generated in plastic deformation of the aluminum plate is transmitted to the mixture, gunpowder is ignited, a thermite reaction between aluminum powder and Fe2O3 is triggered, the gunpowder burns, the thermite reaction spreads from one end of the steel plate to the other end of the steel plate fast to soften the steel plate, and Fe, which is a product of the thermite reaction, sinks to the bottom of the square groove and is combined with steel. The friction deformation-triggered self-propagating assistant aluminum / steel friction stirring overlapping method is used for dissimilar material friction stirring overlapping.

Description

technical field [0001] The invention relates to a friction stir welding method for dissimilar aluminum / steel materials, in particular to a friction deformation triggered self-propagating assisted aluminum / steel friction stir lapping method. Background technique [0002] Environmental protection issues are getting more and more attention from all over the world. In the automobile manufacturing industry, lightweight manufacturing of automobiles can reduce energy consumption, reduce harmful gas emissions, and protect the environment. Aluminum and its alloys are light in weight, high in strength, corrosion resistant, and have good thermal and electrical conductivity, while steel has superior comprehensive mechanical properties. Therefore, the use of aluminum / steel dissimilar metal composite structures can meet the dual technical requirements of structural performance and lightweight design. In aerospace, transportation, shipbuilding and other industries, in order to reduce weigh...

Claims

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Application Information

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IPC IPC(8): B23K20/12B23K20/16B23K20/24B23K23/00
CPCB23K20/122B23K20/165B23K20/24B23K23/00B23K2103/20
Inventor 万龙黄体方吕宗亮王继超谢聿铭李旭黄永宪
Owner 安徽万宇机械设备科技有限公司
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