In-situ rapid self-propagating heating refractory metal explosive welding device and process

A technology of refractory metal and explosive welding, applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve the problems of inconvenient use of electricity, low heating efficiency, and difficulty in controlling the temperature of heated metal, so as to avoid a large number of accumulations and improve heating efficiency high effect

Active Publication Date: 2022-02-11
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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Problems solved by technology

In the case of stable power supply, the electric heating method can continue heating before explosive welding, and can control the temperature of the heated metal before explosive welding, but there are problems such as low heating efficiency
The advantage of electric furnace heating is that the metal can be heated to a very high temperature, but it needs to be transferred to the explosive welding site after heating th

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  • In-situ rapid self-propagating heating refractory metal explosive welding device and process
  • In-situ rapid self-propagating heating refractory metal explosive welding device and process

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[0028] The present invention will be described in detail below with reference to the accompanying drawings.

[0029] The principles of the present invention are: refractory metal (such as tungsten, molybdenum, etc.), generally a body-hearted cube (BCC) structure, BCC metal exists "tutangery conversion temperature", that is, at normal temperature, it will reach a certain temperature Convert to toughness. In conventional explosive welding of the refractory metal, the high strain rate generated by the high-speed collision of the flying plate and the substrate will cause cracking of the refractory metal to heat the fused metal before the explosion welding is heated. Break through the "ductile conversion temperature", and difficult to fuse the metal, then exploding welding, can effectively reduce or eliminate cracks to obtain high quality explosion welding composite plates. Self-spreading reaction is a technique of synthesizing materials using high chemical reaction heat between reacta...

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Abstract

The invention discloses an in-situ rapid self-propagating heating refractory metal explosive welding device and process. The explosive welding device comprises a self-propagating heating container, an excitation circuit, a refractory metal assembly and a detonator. The self-propagating heating container is arranged under a refractory metal explosive welding part, the excitation circuit is electrically connected with the self-propagating heating container, and the detonator is arranged at one side of the refractory metal assembly; the excitation circuit is used for generating instant high temperature to trigger self-propagating reaction; the self-propagating heating container is used for heating the refractory metal assembly after a self-propagating reaction is generated; and after the refractory metal assembly is heated and softened, the detonator is detonated for explosive welding. The purpose of in-situ heating of the refractory metal can be achieved.

Description

technical field [0001] The invention relates to the technical field of refractory metal explosive welding, in particular to an in-situ rapid self-propagating heating refractory metal explosive welding device and process. Background technique [0002] Tungsten and molybdenum are typical refractory metals. They have the characteristics of high temperature resistance and corrosion resistance. They are excellent protective materials. They are usually combined with other metals (such as copper, steel, etc.) to make the metal layered composite materials both protective and high heat. Conductivity (or high strength, etc.) characteristics. For example, in the International Thermonuclear Experimental Reactor project (ITER), the tungsten-copper laminated composite plate material is considered to be the most promising candidate material for plasma-facing high heat flux components. However, the miscibility between layers of materials in the above-mentioned layered composite materials i...

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Application Information

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IPC IPC(8): B23K20/08B23K20/26
CPCB23K20/08B23K20/26
Inventor 陈鹏万刘开源周强高鑫
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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