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

A technology of mechanical crushing and welding rods, applied in the field of nickel powder production, can solve the problems of difficulty in meeting the requirements of powder for welding rods, fine nickel powder, etc., and achieve the effects of improved welding performance, low cost and high crushing efficiency

Inactive Publication Date: 2005-06-29
长沙市维优金属材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the nickel powder prepared by the traditional redox method usually has relatively fine powder particles, which is still difficult to meet the requirements of powder for welding electrodes, and requires process improvement

Method used

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

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Effect test

Embodiment 1

[0018] Embodiment 1. a kind of method that adopts mechanical crushing method to produce the special nickel powder of electric welding rod, its method is:

[0019] A dynamic rotary oxidation furnace is used to continuously oxidize the nickel foam raw material, the oxidation temperature is 860°C, the oxidation time is 25min, and the rotation speed of the oxidation furnace is 35rpm. After the primary oxidation, the oxidation product is crushed by a multi-stage mechanical crusher, and the deformed martensitic strengthened steel Mn13 is used as the material for the mechanical crushing blade in the mechanical crusher. The crushing time is 20 minutes, and the crushing level is 1. Subsequently, the mechanically crushed product was subjected to secondary oxidation. The equipment used was a dynamic rotary oxidation furnace, the oxidation temperature was 880°C, the oxidation time was 20 minutes, and the rotation rate of the oxidation furnace was 35 rpm. The secondary oxidized nickel oxi...

Embodiment 2

[0020] Embodiment 2. a kind of method that adopts mechanical crushing method to produce the special nickel powder of electric welding rod, its method is:

[0021] A dynamic rotary oxidation furnace is used to continuously oxidize the nickel foam raw material, the oxidation temperature is 900°C, the oxidation time is 15min, and the rotation speed of the oxidation furnace is 25rpm. After the primary oxidation, the oxidation product is crushed by a multi-stage mechanical crusher, and the material used for the mechanical crushing blade in the mechanical crusher is the deformed martensitic strengthened steel Mn13. The crushing time is 20 minutes, and the number of crushing stages is 2. Subsequently, the mechanically crushed product was subjected to secondary oxidation. The equipment used was a dynamic rotary oxidation furnace, the oxidation temperature was 870° C., the oxidation time was 15 minutes, and the rotation rate of the oxidation furnace was 30 rpm. The secondary oxidized ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/00
Inventor 匡怡新贺跃辉
Owner 长沙市维优金属材料有限公司
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