Method for manufacturing specified nickel powder for welding electrode by machinery crushing method

Abstract

The invention is an electric welding rod special nickel powder production technique by machine fragmenting. Fragment an oxidating production with brittle nickel oxide surfacing layer outside and nickel inside which obtained by dynamically continuously oxidating the foam nickel raw material, with multi-level fragmenting machine. Secondary oxidating the fragmented powder obtaining large particle nickel oxide powder and then take the powder into phasing deoxidation so to obtain high performance nickel powder with high purity and large particles which is also the advantages of the invention and the powder is a fine material of electric welding rod coating. The production technique is simple, of low cost and high efficiency which adapted to mass production. The preparation processes is without any additions and any pollutions which is environmetal.

Description

technical field

[0001] The invention relates to a method for producing nickel powder, in particular to a method for producing special nickel powder for welding electrodes by adopting a mechanical crushing method. Background technique

[0002] At present, wear-resistant and corrosion-resistant surfacing electrodes are widely used in petroleum, chemical and other industrial equipment manufacturing fields. However, traditional electrodes often have problems such as cracking of the coating, large spatter, raised weld seam, deterioration of forming, and difficulty in slag removal during the welding process. In addition, the particles of nickel powder used in traditional welding electrodes are relatively small, and the content of sulfur and phosphorus is often high, which seriously affects the welding quality. The use of coarse nickel powder with low sulfur and phosphorus content as the electrode coating can significantly improve the welding performance of the electrode. At pres...

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