Powder cored wire for CrB-containing amorphous coating prepared by electric arc spraying

A technology of amorphous coating and powder core wire, which is applied in the direction of coating, metal material coating process, fusion spraying, etc., to achieve the effect of high hardness, good wear resistance and uniform coating structure

Inactive Publication Date: 2006-12-13
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with plasma spraying and supersonic flame spraying, arc spraying has the characteristics of rapid heating, rapid cooling, in-situ large-area construction, good economy, and good coating performance. It is widely

Method used

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  • Powder cored wire for CrB-containing amorphous coating prepared by electric arc spraying
  • Powder cored wire for CrB-containing amorphous coating prepared by electric arc spraying
  • Powder cored wire for CrB-containing amorphous coating prepared by electric arc spraying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A 304L stainless steel strip of 10×0.3mm (10mm in width and 0.3mm in thickness) is selected. Roll it into a U shape first. Get 600 grams of boron chromium powder, Cr 3 C 2 200 grams of powder, 100 grams of WC powder, and 100 grams of iron powder. The various powders taken were put into a powder mixer and mixed for 10 minutes, and then the mixed powder was added into a U-shaped 304L stainless steel belt groove, and the filling rate was 30%. Close the U-shaped groove so that the medicine powder is wrapped in it, and then gradually reduce the diameter through the wire drawing die to make the diameter reach 2.0mm. The arc spraying coating is prepared on the metal substrate roughened by sand blasting, the spraying current is 150-180A, the spraying voltage is 30-32V, the spraying air pressure is 0.55MP, and the spraying distance is 150mm. The hardness and relative wear resistance of the sprayed coating are shown in Table 1.

Embodiment 2

[0017] A 304L stainless steel strip of 10×0.3mm (10mm in width and 0.3mm in thickness) is selected. Roll it into a U shape first. Get boron chromium powder 650 grams, Cr 3 C 2 150 grams of powder, 100 grams of WC powder, and 100 grams of iron powder. The various powders taken were put into a powder mixer and mixed for 10 minutes, and then the mixed powder was added into a U-shaped 304L stainless steel belt groove, and the filling rate was 32%. Close the U-shaped groove so that the medicine powder is wrapped in it, and then gradually reduce the diameter through the wire drawing die to make the diameter reach 2.0mm. The arc spraying coating is prepared on the metal substrate roughened by sand blasting, the spraying current is 150-180A, the spraying voltage is 30-32V, the spraying air pressure is 0.6MP, and the spraying distance is 100mm. The hardness and relative wear resistance of the sprayed coating are shown in Table 1. The TEM photo of the coating and the selected area ...

Embodiment 3

[0019] A 304L stainless steel strip of 10×0.3mm (10mm in width and 0.3mm in thickness) is selected. Roll it into a U shape first. Get 700 grams of boron chromium powder, Cr 3 C 2 100 grams of powder, 50 grams of WC powder, and 150 grams of iron powder. The various powders taken were put into the powder mixer and mixed for 10 minutes, and then the mixed powder was added into the U-shaped 304L stainless steel belt groove, and the filling rate was 34%. Close the U-shaped groove so that the medicine powder is wrapped in it, and then gradually reduce the diameter through the wire drawing die to make the diameter reach 2.0mm. The arc spraying coating is prepared on the metal substrate roughened by sand blasting, the spraying current is 150-180A, the spraying voltage is 30-32V, the spraying air pressure is 0.55MP, and the spraying distance is 200mm. The hardness and relative wear resistance of the sprayed coating are shown in Table 1, and the X-ray diffraction pattern of the coat...

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Abstract

An electrical arc spraying method for preparing amorphous-coating dust core wire containing CrB belongs to hot spraying domain in material processing project and is mainly used in various industrial domains including anticorrosive domain and wearable domain. The amorphous alloy is association of high strength, hardness, tenacity, abradability and noncorrosibility, but there is no patent report about the electrical arc spraying method for preparing iron-base amorphous-coating dust core wire both at home and abroad. The invention is about an electrical arc spraying method for preparing amorphous-coating dust core wire containing CrB and is characterized in that the mass percentage content range of the said dust core components is as follows: 60-80 % boron- chromium, 5-20 % Cr3C2, 5-10 % WC and the residue is iron dust. The covering prepared with the invented dust core contains a good deal of amorphous carborundum, the coating formation is even and has high rigidity with HV0.1 of more than 1190, and has good abradability and the relative abradability is 15.8 times than the Q235 steel.

Description

technical field [0001] The invention relates to a powder core wire material for preparing CrB-containing amorphous coatings by arc spraying, belongs to the field of thermal spraying in material processing engineering, and is mainly used in various industrial fields such as anticorrosion and wear resistance. Background technique [0002] Failures caused by various wear and corrosion often occur on the surface of materials and their components. In order to prevent some parts working under conditions of high speed, high temperature, high pressure, heavy load, and corrosive media, the entire part will be scrapped due to local damage on the surface. , in order to improve the reliability of parts and prolong their service life, researchers have developed a large number of practical, advanced and efficient surface engineering technologies to repair or strengthen the surface of parts, and prepare a thin layer of surface function that is superior to the properties of the bulk material...

Claims

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Application Information

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IPC IPC(8): C23C4/04
Inventor 贺定勇蒋建敏傅斌友李晓延
Owner BEIJING UNIV OF TECH
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