Subzero cooling strengthening processing method of 5A06 aluminum alloy TIG welding joint
A technology for welding joints and strengthening treatment, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., to achieve the effects of wide sources, low prices and simple operation
Inactive Publication Date: 2010-02-17
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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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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Experimental program
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Effect test
Embodiment Construction
[0006] Take the 5A06 aluminum alloy workpiece welded by TIG as an example, the operation steps are as follows:
[0007] ①Put the 5A06 aluminum alloy welded parts welded by TIG into the DWS-2188 cryogenic strengthening treatment device controlled by the computer with liquid nitrogen as the cold source;
[0008] ② Decrease the temperature in the cryogenic treatment device from room temperature to -180°C at a cooling rate of 8°C / min;
[0009] ③Hold at -180℃ for 3 hours;
[0010] ④ Cut off the power, turn off the liquid nitrogen, open the device, and let the welding parts reach room temperature in the air.
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The invention relates to a subzero cooling strengthening processing method of a 5A06 aluminum alloy TIG welding joint, belonging to the technical field of the subzero cooling strengthening processingof metal pieces and comprising the following operation steps: (1) placing a TIG welded 5A06 aluminum alloy piece into a subzero cooling processing device controlled by a control system; (2) reducing the temperature of the subzero cooling processing device from room temperature to -180 DEG C with temperature reducing speed of 8 DEG C / min; (3) preserving the temperature for 3 hours; and (4) cuttingoff a power supply, closing a cooling source and opening the subzero cooling processing device so that the TIG welded 5A06 aluminum alloy piece achieves the room temperature in air. The invention canenhance the rigidity and the strength of the 5A06 aluminum alloy TIG 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 deep cold strengthening treatment of metal parts, and specifically relates to a deep cold strengthening treatment method for 5A06 aluminum alloy TIG welded joints. Background technique: [0002] 5A06 aluminum alloy has high specific strength, specific modulus, fatigue and corrosion resistance, and good formability, so it is widely used in machinery manufacturing, aviation, aerospace, shipbuilding, railway, vehicle manufacturing, and weapons and equipment industries. Land application. In the above-mentioned industry applications, it is often encountered that aluminum alloy parts need to be welded, and the high temperature and high temperature of the aluminum alloy welding joints are often over 350 ℃ during welding, which causes the internal structure of the metal to recover, recrystallize, and grains. When it grows up, the metal at the welded joint is softened and the mechanical properties are reduced, thus a...
Claims
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IPC IPC(8): C22F1/04C21D9/50
Inventor 吴志生赵菲刘翠荣位敬晓靳鹏飞徐俊生
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY