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Flash Welding Forming Method of Nickel-based Superalloy Large Section Ring

A nickel-based high-temperature alloy with large cross-section technology, applied in welding equipment, resistance welding equipment, metal processing equipment, etc., can solve problems such as welding quality influence, discontinuity, and unstable temperature field, and achieve a reasonable temperature field and preheating The effect of process stabilization

Active Publication Date: 2017-01-11
贵阳安大宇航材料工程有限公司
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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 Nickel-based Superalloy Large Section Ring
  • Flash Welding Forming Method of Nickel-based Superalloy Large Section Ring
  • Flash Welding Forming Method of Nickel-based Superalloy Large Section Ring

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[0031] The main chemical element content (percentage by weight) of the alloy is: C content ≤ 0.08%, Cr content 17.0% ~ 21.0%, Ni content 50.0% ~ 55.0%, Co content ≤ 1.0%, Mo content 2.80% ~3.30%, Al content 0.30%~0.70%, Ti content 0.75%~1.15%, Nb content 4.75%~5.50%, B content ≤0.006%, Mg content ≤0.01%, Mn content ≤0.35 %, Si content ≤0.35%, P content ≤0.015%, S content ≤0.015%, Cu content ≤0.30%, Ca content ≤0.01%, Pb content ≤0.0005%, Se content ≤0.0003% , The balance is Fe.

[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 large-section ring billet 100 of nickel-based superalloy with opening on the left clamp 111, and fix the right end 122 on the right clamp 112; set the working power of the flash welding machine to be P=420KVA~980KVA, and the current I 0 =45KA~55KA, when the power is turned on, the distance between the openings at both ends is relatively large, an...

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Abstract

The invention discloses a flash welding forming method for a nickel-base superalloy large-cross-section ring piece. The method includes the steps that firstly, a nickel-base superalloy 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 a nickel-based superalloy 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K11/04B23K11/34
CPCB23K11/04B23K11/34
Inventor 梁宇魏志坚江飞龙肖志翔
Owner 贵阳安大宇航材料工程有限公司
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