Manufacturing method of tungsten-yttrium electrode

A manufacturing method and electrode technology, applied in the field of electrode manufacturing, can solve the problems of inability to meet corresponding requirements, uneven tungsten-yttrium coating powder, small penetration depth at high current, etc., and achieve reduced process, stable welding performance, and improved electrical conductivity. performance effect

Active Publication Date: 2009-04-15
BEIJING GENERAL RES INST OF MINING & METALLURGY +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] At present, the methods for manufacturing tungsten-yttrium electrodes at home and abroad mainly use evaporating pots to stir tungsten-yttrium-coated powders, and then use tungsten-yttrium-coated powders to prepare tungsten-yttrium electrodes. The inventors have found that the prior art has at least the following problems: When tungsten yttrium is coated with powder, evaporators, ovens, etc. are used. Due to the defects of the equipment itself, the prepared tungsten yttrium coated powder is not uniform, which leads to the performance of the prepared tungsten yttrium electrode (such as: in, High current penetration, etc.) cannot meet the corresponding requirements. In welding applications, there are problems such as high current penetration, small arc breaking frequency, etc.

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  • Manufacturing method of tungsten-yttrium electrode

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Embodiment 1

[0028] This embodiment provides a method for manufacturing a tungsten-yttrium electrode. The tungsten-yttrium electrode is manufactured by combining powder metallurgy and pressure processing. The method is carried out according to the following steps, specifically including:

[0029] a. After uniformly mixing the yttrium nitrate aqueous solution into the solid raw material by spray doping, heating and drying to make tungsten-yttrium coated powder; wherein, the solid raw material can be ammonium paratungstate (APT) or tungsten trioxide (WO 3 any of );

[0030] b. The obtained tungsten-yttrium coated powder is reduced twice to obtain tungsten-yttrium powder, which is pressed and sintered at high temperature to make a tungsten-yttrium billet;

[0031] c. The obtained tungsten-yttrium billet is made into a tungsten-yttrium electrode by means of pressure processing and forging.

[0032] In practice, the above method can refer to figure 1 The process shown is processed, including:...

Embodiment 2

[0038] The present embodiment provides a kind of method of manufacturing tungsten yttrium electrode, specifically comprises:

[0039] a. Preparation of tungsten yttrium coated powder:

[0040] The aqueous solution prepared by yttrium nitrate and the solid raw material ammonium paratungstate APT are doped in the doping machine, and the tungsten-yttrium coated powder is prepared by spray drying and other processes, as follows:

[0041] ① Dissolve 13.5-15kg of yttrium nitrate in 15L of deionized water according to the grade requirements of the produced tungsten yttrium electrode to make an aqueous solution of yttrium nitrate for use;

[0042] ②Put 450Kg of ammonium paratungstate (APT) into the doping machine, and spray 15L of yttrium nitrate aqueous solution with a concentration of 0.9-1.0g / ml into the doping machine. During the spraying process, a vacuum device can be used. Realize spray coating on ammonium paratungstate APT;

[0043] ③ The injection speed is 25ml / min, and the...

Embodiment 3

[0047] This embodiment also provides a method for manufacturing a tungsten yttrium electrode, which specifically includes:

[0048] Preparation of tungsten yttrium coated powder: the aqueous solution prepared by yttrium nitrate and the solid raw material tungsten trioxide (WO 3 ), the tungsten-yttrium coated powder prepared by doping, spray drying and other processes in the doping machine, the details are as follows:

[0049] ① Dissolve 23-24kg of yttrium nitrate in 15L of deionized water according to the grade requirements of the produced tungsten-yttrium electrode to make an aqueous solution for use;

[0050] ② 450Kg of tungsten trioxide (WO 3 ) into the doping machine and spray the configured 15L yttrium nitrate aqueous solution into the doping machine;

[0051] ③ The injection speed is 45ml / min, and the injection time is 30 minutes to 45 minutes;

[0052] ④ About 20 minutes after spraying liquid, send in steam, when the steam pressure is 0.15-0.3Mpa, and the steam tempe...

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Abstract

The invention discloses a method for producing a tungsten-yttrium electrode, which comprises: a. yttrium nitrate water solution is evenly mixed with a solid material containing ammonium paratungstate(APT) or tungsten trioxide(WO3) in the mode of spray mixing, and heated and dried to prepare tungsten-yttrium coating powder; b. the prepared tungsten-yttrium coating powder is reduced twice to obtain tungsten-yttrium powder, and the tungsten-yttrium powder is pressed and sintered to obtain a tungsten-yttrium cored bar; and c. by adopting the pressure processing forging method, the prepared tungsten-yttrium cored bar is made into the tungsten-yttrium electrode. In the method, the yttrium nitrate water solution is evenly mixed with the solid material containing the ammonium paratungstate(APT) or the tungsten trioxide(WO3) in the mode of spray mixing; due to the spraying mode, the yttrium nitrate water solution coats the surface of the ammonium paratungstate(APT) or the tungsten trioxide(WO3), so the mixing, stirring and drying of the yttrium nitrate water solution and the solid material are completed together, thereby achieving the aim of preparing the even tungsten-yttrium coating powder, improving the production capability, making the coating powder more even and effectively improving the performance of the tungsten-yttrium electrode in welding.

Description

technical field [0001] The invention relates to a technology for manufacturing electrodes, in particular to a method for manufacturing tungsten yttrium electrodes used in technologies such as tungsten inert gas shielded welding TIG and plasma PLSMA. Background technique [0002] Tungsten electrode material is one of the key materials used in tungsten inert gas welding (TIG) and plasma (PLSMA) technology. There are many types of tungsten electrodes currently used in industry. For example: cerium tungsten electrode, lanthanum tungsten electrode, thoriated tungsten electrode, etc. Among the widely used tungsten electrodes, thoriated tungsten electrodes show better performance. However, since thorium is a radioactive substance, it will cause cumulative radioactive hazards to the human body and radioactive pollution to the environment. The tungsten-yttrium electrode currently developed is aimed at replacing existing ones in the technical fields of tungsten inert gas shielded we...

Claims

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Application Information

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IPC IPC(8): B23P15/00B22F3/16B22F1/00
Inventor 李炳山彭鹰王芦燕李树清巫正瑜孙宝成
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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