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Subzero cooling strengthening processing method of 5A06 aluminum alloy MIG welding joint

A technology of welded joints and strengthening treatment, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., to achieve the effects of low price, easy transportation and storage, and simple operation

Active Publication Date: 2011-04-13
太重集团向明智能装备股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In a word, above-mentioned three kinds of prior art all exist the limitation of some shortcoming and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0006] 1. Taking the 5A06 aluminum alloy workpiece after automatic MIG welding as an example, the operation steps are as follows:

[0007] ①Put the 5A06 aluminum alloy weldment that has been automatically MIG welded into the DWS-2188 cryogenic strengthening treatment device that uses liquid nitrogen as the cold source and is controlled by a computer;

[0008] ② Lower the temperature in the cryogenic treatment device from room temperature to -196°C at a cooling rate of 6°C / min;

[0009] ③Insulate at -196°C for 6 hours;

[0010] ④ Cut off the power supply, turn off the liquid nitrogen, turn on the device, and let the weldment reach room temperature in the air.

[0011] 2. Taking the 5A06 aluminum alloy workpiece after manual MIG welding as an example, the operation steps are as follows:

[0012] ①Put the 5A06 aluminum alloy welding parts that have been manually MIG welded into the DWS-2188 cryogenic strengthening treatment device that uses liquid nitrogen as the cold source an...

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Abstract

The invention relates to a subzero cooling strengthening processing method of a 5A06 aluminum alloy MIG welding joint, belonging to the technical field of the subzero cooling strengthening processing of metal pieces and comprising the following operation steps: (1) placing an MIG welded 5A06 aluminum alloy piece into a subzero cooling processing device controlled by a control system; (2) reducingthe temperature of the subzero cooling processing device from room temperature to -150 DEG C to -196 DEG C with temperature reducing speed of 5 DEG C / min to 9 DEG C / min; (3) preserving the temperature for 2 to 6 hours; and (4) cutting off a power supply, closing a cooling source and opening the subzero cooling processing device so that the MIG welded 5A06 aluminum alloy piece achieves the room temperature in air. The invention can enhance the rigidity and the strength of the 5A06 aluminum alloy MIG welding joint and also refines the grain size and has easy operation, low cost, innocuity and no pollution.

Description

Technical field: [0001] The invention belongs to the technical field of cryogenic strengthening treatment of metal parts, and in particular relates to a method of cryogenic strengthening treatment of 5A06 aluminum alloy MIG welded joints. Background technique: [0002] 5A06 aluminum alloy has high specific strength, specific modulus, fatigue resistance and corrosion resistance, and good formability, so it is widely used in machinery manufacturing, aviation, aerospace, shipbuilding, railway, vehicle manufacturing and weaponry industry ground application. In the application of the above industries, it is often necessary to weld aluminum alloy parts, and the high temperature of the aluminum alloy welding joints is often above 350°C during welding, which causes the internal structure of the metal to recover, recrystallize, and grain Growing up, the metal at the welded joint softens and the mechanical properties decrease, which affects the use requirements, and under corrosive c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/04C21D9/50
Inventor 吴志生高珊赵菲刘翠荣张士亮位敬晓陈晓燕
Owner 太重集团向明智能装备股份有限公司