Self-fused alloy powder for plasma spray welding

A technology of self-fluxing alloys and alloy powders, applied in welding media, welding equipment, metal processing equipment, etc., can solve problems such as uneven internal stress release, many cracks on the surface of the spray welding layer, uneven coating structure, etc., to achieve Spray welding process performance is excellent, the welding layer is smooth and smooth, and the effect of enhancing wear resistance

Inactive Publication Date: 2010-09-22
樊琨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the spray welding layer formed by most of the alloy powder formulas on the market has many surface cracks, slag inclusions in the coating, uneven coating structure and unstable quality. The layer requires high hardness, wear resistance and no cracks. In fact, it is difficult to balance high hardness and no cracks. The higher the hardness, the more uneven the internal stress release, and the easier it is to produce cracks that affect product quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] If the alloy powder for plasma spray welding has special heat resistance requirements, such as rolls and conveyor rolls used in the metallurgical industry, the content of chromium, vanadium, and molybdenum can be appropriately increased within the range, and the composition ratio is:

[0012] Chromium 40%, titanium 19%, nickel 13%, vanadium 5%, molybdenum 6%, boron 4.5%, silicon 2%, carbon 4%, iron balance.

Embodiment 2

[0014] If the alloy powder for plasma spray welding has special corrosion resistance requirements, such as coal mining equipment, chemical equipment, etc., the content of chromium, titanium, and nickel can be appropriately increased within the range, and the composition ratio is:

[0015] 40% of chromium, 19% of titanium, 13% of nickel, 2% of vanadium, 2% of molybdenum, 4.5% of boron, 2% of silicon, 4% of carbon, and the balance of iron.

Embodiment 3

[0017] If there is no special requirement for the alloy powder for plasma spray welding, only the wear resistance is considered. On the premise of ensuring the product quality, the content of expensive elements in the formula can be adjusted appropriately within the range. The composition ratio is:

[0018] Titanium 12%, chromium 33%, nickel 6%, boron 4.5%, silicon 2%, carbon 4%, vanadium 2%, molybdenum 2%, iron balance.

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PUM

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Abstract

The invention relates to self-fused alloy powder for plasma spray welding, which is used for forming high-intensity abrasion-resistance layers. The alloy with a recipe comprises the following ingredients: 33 to 40 percent of chromium, 12 to 19 percent of titanium, 6 to 13 percent of nickel, 2 to 5 percent of vanadium, 2 to 6 percent of molybdenum, 4.5 to 5 percent of boron, 2 to 3 percent of silicon, 4 to 5.5 percent of carbon and the balance of iron. The invention is particularly suitable for the plasma spray welding on the surfaces of easy-fatigue and easy-abrasion work pieces, the spray welding layer has the performance such as wear resistance, heat resistance, corrosion resistance, oxidation resistance, high rigidity, high hardness and the like, and has the advantages of compact crystal, few air holes, few cracks and little slag inclusion.

Description

Technical field: [0001] The invention relates to a self-fluxing alloy powder for plasma spray welding or laser cladding for metal surface wear-resisting strengthening treatment. Background technique: [0002] Metal-ceramic composite coating technology has a wide range of uses in many fields such as national economy and people's livelihood. Many scientific research institutions at home and abroad have also invested huge financial and material resources in research. Plasma spray welding technology is one of the metal-ceramic composite coating technologies. At present, the spray welding layer formed by most of the alloy powder formulas on the market has many surface cracks, slag inclusions in the coating, uneven coating structure and unstable quality. The layer requires high hardness, wear resistance and no cracks. In fact, it is difficult to balance high hardness and no cracks. The higher the hardness, the more uneven the internal stress release, and the easier it is to produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/32
Inventor 樊琨樊昕
Owner 樊琨
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