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
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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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