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Flash Welding Forming Method of Aluminum Alloy Large Section Ring

An aluminum alloy, large-section technology, applied in welding equipment, resistance welding equipment, metal processing equipment, etc., can solve the problems of welding quality influence, discontinuity, and undisclosed process parameters, etc., and achieve a reasonable temperature field and stable preheating process Effect

Active Publication Date: 2016-08-24
GUIZHOU ANDA AVIATION FORGING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method can form a temperature field, it does not disclose specific process parameters, and this method uses intermittent preheating to establish a temperature field and a flash process to adjust the temperature field, so the process is discontinuous. The formed temperature field is unstable, which will have a certain impact on the welding quality

Method used

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  • Flash Welding Forming Method of Aluminum Alloy Large Section Ring
  • Flash Welding Forming Method of Aluminum Alloy Large Section Ring
  • Flash Welding Forming Method of Aluminum Alloy Large Section Ring

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[0031] The main chemical element content (percentage by weight) of the alloy is: 1.9% to 2.5% of Cu, 1.4% to 1.8% of Mg, 0.9% to 1.5% of Fe, 0.9% to 1.5% of Ni, 0.9% to 1.5% of Ni, The content of Ti is 0.02%-0.10%, the content of Mn is 0.20%, the content of Zn is 0.30%, the content of Si is 0.35%, other elements are individually ≤0.05% and the sum is ≤0.10%, and the balance is Al.

[0032] The flash welding forming process steps of the alloy large cross-section ring are as follows:

[0033] Step 1: Preheat. Fix the left end 121 of the aluminum alloy large-section ring blank 100 with openings on the left fixture 111, and fix the right end 122 on the right fixture 112; set the working power of the flash welder to P=250KVA~750KVA, and the current I 0 =45KA~55KA, when the power is turned on, the distance between the openings at both ends is relatively large, and the current will flow from the left end 121 of the ring blank 100 through the back 101 of the ring blank 100 to the rig...

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Abstract

The invention discloses a flash welding forming method for an aluminum alloy large-cross-section ring piece. The method includes the steps that firstly, an aluminum alloy large-cross-section ring blank with an opening is fixed to a clamp, a power source is started, current is enabled to reach the right end from the left end through the back and forms circular current, and preheating is performed; secondly, the right end is driven to be close to the left end, and weak flashing is performed; thirdly, feeding speed is increased, the current is adjusted, strong flashing is performed, and a temperature field is formed; fourthly, the length of a high-temperature mushy zone and the length of a high-temperature microstructure coarsening zone are calculated according to the temperature field so that the upset forging distance can be determined and upset forging can be performed; fifthly, pressure maintaining is performed for a period of time. Through the method, the stable and reasonable temperature field can be formed, it can be guaranteed that in the upset forging process, metal of the high-temperature mushy zone can be totally ejected out of a base body, full plastic deformation can happen to metal of the high-temperature microstructure coarsening zone, grains are refined through recovery and recrystallization, and the high-quality flash welding ring piece is obtained. The method is used for flash welding forming of the large-cross-section ring piece.

Description

technical field [0001] The invention relates to a welding method, in particular to a flash welding forming method of an aluminum alloy large-section ring. Background technique [0002] Flash welding is a kind of solid-state welding. A certain temperature field is formed on the two welding end faces of the workpiece through flashing, and then the workpiece is welded by the action of upsetting force. Therefore, a reasonable match between the temperature field and the upsetting parameters is the key to achieving high-quality welding. A suitable temperature field can provide suitable diffusion activation energy for the metal atoms, accelerate the mutual diffusion of atoms at both ends during the upsetting deformation process, and meet the requirements of the upsetting process. Process metal plastic deformation requirements, and the establishment of the temperature field is mainly determined by the flash stage. The temperature field formed by the flash process is mainly divided ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K11/04
CPCB23K11/04B23K11/046B23K2103/10
Inventor 欧阳斌郑禄鹏王斌郭晓富邹坚
Owner GUIZHOU ANDA AVIATION FORGING
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