Production method of 5XXX-serial aluminum alloy large-diameter thin-walled pressure-resisting pipe

A super-large diameter, production method technology, applied in metal processing, tubular articles, metal processing equipment, etc., can solve the problems of poor fusion welding performance, poor fusion welding performance, difficult welding seams, etc., and achieve good weld consistency and welding. The effect of good seam strength and high pressure resistance in the pipe

Inactive Publication Date: 2015-06-03
郑英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fusion welding performance of aluminum alloys is poor, especially high-strength aluminum alloys usually have high alloy content, and their fusion welding performance is even worse. In terms of welding, especially when the welding thickness exceeds about 20mm, it is difficult to obtain high-quality welds in the fusion welding of aluminum alloys, and the welding coefficient of weld performance is usually only below 0.5 to 0.6, especially when the weld is long. It is more difficult to obtain welds with consistent quality and stable performance, especially welds that require pressure resistance; for this reason, there must be a high-reliability welding method to ensure the welding performance of high-strength aluminum alloys and the welding of long welds Consistency of performance, friction stir welding can just solve this problem, its weld structure is dense, the grain is fine, the quality is stable during long-distance welding, and the welding coefficient can reach about 0.8~0.9 stably, it is most suitable for welding with a certain thickness Advanced aluminum alloy welding method, combined with reasonable production process and heat treatment, can produce medium-strength and pressure-resistant large-diameter aluminum alloy pipes

Method used

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  • Production method of 5XXX-serial aluminum alloy large-diameter thin-walled pressure-resisting pipe
  • Production method of 5XXX-serial aluminum alloy large-diameter thin-walled pressure-resisting pipe

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Embodiment 1 5083 aluminum alloy pipe welding

[0017] (1) Material preparation: the specification (length×width×thickness) is 6180mm×2308mm×35mm hot-rolled sheet;

[0018] (2) Curling (or rolling) the hot-rolled plate on a special large-scale plate rolling machine to make it roll into a circular drum with an effective inner diameter of Φ700mm;

[0019] (3) Put the welding clamp body 1 first (such as figure 1 , figure 2 shown) is installed on the workbench 9 of the friction stir welding machine, and then the rolled aluminum alloy tube 6 is installed on the positioning mandrel 3 of the welding clamp body 1, and the weld seam 5 is at the position of the positioning mandrel 3 at the same time At the position of the upper busbar, the aluminum alloy tube 6 is clamped on the positioning mandrel 3 through a special circular clamp 8 and a hydraulic clamping mechanism 7 .

[0020] (4) Adjust the position of the stirring head 2 so that it welds from one end of the weld to the...

Embodiment 2

[0024] Embodiment 2 5052 aluminum alloy pipe welding

[0025] (1) Material preparation: the specification (length×width×thickness) is 6180mm×3956mm×60mm hot-rolled sheet;

[0026] (2) Curling (or rolling) the hot-rolled plate on a special large-scale plate rolling machine to make it roll into a circular drum, and the effective inner diameter of the drum is Φ1200mm;

[0027] (3) Put the welding clamp body 1 first (such as figure 1 , figure 2 shown) is installed on the workbench 9 of the friction stir welding machine, and then the rolled aluminum alloy tube 6 is installed on the positioning mandrel 3 of the welding clamp body 1, and the weld seam 5 is at the position of the positioning mandrel 3 at the same time At the position of the upper busbar, the aluminum alloy tube 6 is clamped on the positioning mandrel 3 through a special circular clamp 8 and a hydraulic clamping mechanism 7 .

[0028] (4) Adjust the position of the stirring head 2 so that it welds from one end of t...

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Abstract

The invention discloses a production method of a 5XXX-serial aluminum alloy large-diameter thin-walled pressure-resisting pipe. The production method comprises the following steps: (1) preparing materials; (2) rolling or rolling coiling blocks; (3) stirring and carrying out friction welding; (4) shaping; (5) carrying out a pressure-tight test. The aluminum alloy pipe produced by the method disclosed by the invention is good in weld strength, good in weld consistency, good in pipe roundness and great in intra-pipe pressure resistance. The lowest yield strength of the pipe weld and allowable intra-pipe pressure resistance (suitable for gases and liquids) are as follows: sigma02 is higher than or equal to 130 MPa, and P internal pressure is higher than or equal to 10 MPa.

Description

Technical field: [0001] The technical field of the invention belongs to the field of non-ferrous metal processing, and provides a production method and process of a medium-strength aluminum alloy pipe with a diameter exceeding Φ700 mm. technical background: [0002] The production methods of aluminum alloy pipes are usually extrusion, spinning, etc. Extrusion is limited by extrusion efficiency, extrusion ratio and extrusion equipment. At present, the wall thickness that can be extruded in the world is 10-50mm and the maximum diameter is No more than Φ700mm. Spinning can increase the diameter of extruded tubes, but the length that can be processed is limited and the efficiency is relatively low. Therefore, it is not suitable for mass production of thin-walled tubes. At present, large-diameter thin-walled steel pipes are often produced by welding. Due to the good fusion welding performance of steel, especially low-carbon steel, the fusion welding performance is good, and high...

Claims

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Application Information

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IPC IPC(8): B21C37/08B23K20/12
CPCB21C37/08B23K20/1225B23K2101/06
Inventor 郑英姚齐水吴周敏薛慧
Owner 郑英
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