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Powered core coil for spraying low alloy quantity Fe-base amorphous alloy coating by electric arc

A powder core wire, arc spraying technology, applied in metal material coating process, coating, melting spraying and other directions, can solve the problems of limited amorphous forming ability, short development time, insufficient depth of amorphous alloy coating, etc. To achieve the effect of good thermal stability and dense tissue structure

Inactive Publication Date: 2010-01-06
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the short period of work in this area, the research on the preparation of amorphous alloy coatings by powder core wire and arc spraying technology is not deep enough. The existing powder core wire, such as arc spraying containing NiB and CrB amorphous coatings Powder core wire, the cost of formula preparation is relatively high, and the ability to form amorphous is limited

Method used

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  • Powered core coil for spraying low alloy quantity Fe-base amorphous alloy coating by electric arc
  • Powered core coil for spraying low alloy quantity Fe-base amorphous alloy coating by electric arc
  • Powered core coil for spraying low alloy quantity Fe-base amorphous alloy coating by electric arc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 450 grams of ferroboron powder; 10 grams of ferromanganese powder; 90 grams of ferrosilicon powder; 200 grams of chromium powder; 150 grams of ferromolybdenum powder; 80 grams of chromium carbide powder; mixed rare earth: 20 grams. The various powders taken were put into the powder mixer and mixed for 10 minutes. Select a 304L stainless steel strip with a thickness of 0.3mm×width of 10mm, first roll it into a U shape, then add the mixed powder into the U-shaped 304L stainless steel strip groove, and the filling rate is 30%. Close the U-shaped groove, and then gradually reduce the diameter through the wire drawing die to make the diameter reach 2.0mm. Coating I was prepared on the Q235 substrate by arc spraying technology, spraying current 180-200A, spraying voltage 30V, spraying air pressure 0.55MP, and spraying distance 200mm. The XRD pattern of coating I is shown in figure 1 , there are obvious amorphous diffraction packets in the 30°~60° area in the figure. T...

Embodiment 2

[0020] Take 500 grams of ferroboron powder; 15 grams of ferromanganese powder; 80 grams of ferrosilicon powder; 135 grams of chromium powder; 170 grams of ferromolybdenum powder; 70 grams of chromium carbide powder; mixed rare earth: 30 grams. The various powders taken were put into the powder mixer and mixed for 10 minutes. Select the 304L stainless steel strip with a thickness of 0.3 mm × width 10 mm, first roll it into a U shape, then add the mixed powder into the U-shaped 304L stainless steel strip groove, and the filling rate is 26%. Close the U-shaped groove, and then gradually reduce the diameter through the wire drawing die to make the diameter reach 2.0mm. Coating II was prepared on the Q235 substrate by arc spraying technology, with a spraying current of 180-200A, a spraying voltage of 32V, a spraying air pressure of 0.6MP, and a spraying distance of 150mm. The XRD pattern of Coating II is shown in figure 1 , there are obvious amorphous diffraction packets in the 3...

Embodiment 3

[0022] Take 550 grams of ferroboron powder; 20 grams of ferromanganese powder; 60 grams of ferrosilicon powder; 150 grams of chromium powder; 140 grams of ferromolybdenum powder; 65 grams of chromium carbide powder; mixed rare earth: 15 grams. The various powders taken were put into the powder mixer and mixed for 10 minutes. Select the 304L stainless steel strip with a thickness of 0.3 mm × width 10 mm, first roll it into a U shape, then add the mixed powder into the U-shaped 304L stainless steel strip groove, and the filling rate is 38%. Close the U-shaped groove, and then gradually reduce the diameter through the wire drawing die to make the diameter reach 2.0mm. Coating III was prepared on the Q235 substrate by arc spraying technology, spraying current 180-200A, spraying voltage 32V, spraying air pressure 0.6MP, spraying distance 180mm. The XRD pattern of Coating III is shown in figure 1 , there are obvious amorphous diffraction packets in the 30°~60° area in the figure. ...

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Abstract

The invention belongs to the field of hot spray in material processing engineering and aims at providing a powered core coil for spraying low alloy quantity Fe-base amorphous alloy coating by electric arc. In the powered core coil, a stainless steel band is coated on a powered core; the diameter of the coil is 2.0mm, and the powered core occupies 25-42 percent of the coil by weight percent. The powered core comprises the components by weight percent: 40-70 percent of ferroboron, 1-5 percent of ferromanganese, 5-15 percent of silicoferrite, 1-20 percent of chromium powder, 5-20 percent of ferromolybdenum, 5-15 percent of chromium carbide and 1-5 percent of misch metal. The powered core coil has higher noncrystalline forming ability; the coating prepared by an electric arc spraying technology has compact organization structure and good thermal stability, the amorphous phase content is larger than 70 percent, and the microhardness HV0.1 is larger than 1300.

Description

technical field [0001] The invention relates to a powder core wire rod for electric arc spraying low alloy content Fe-based amorphous alloy coating, which belongs to the field of thermal spraying in material processing engineering. Background technique [0002] Amorphous alloys do not have a crystal structure, and compared with polycrystalline alloys composed of the same elements, they have the advantages of excellent mechanical properties, wear resistance, and corrosion resistance. Among them, Fe-based amorphous alloys have the characteristics of relatively low cost of raw materials, good mechanical properties and good thermal stability, and have become an important branch of the development of amorphous alloy systems. Amorphous alloys have become alloy materials with great development potential due to their unique and excellent properties. However, due to the limitation of preparation conditions, amorphous alloys have not been widely used in the engineering field. Advanced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/12C23C4/131
Inventor 魏琪卢兰志李辉李红李国栋栗卓新
Owner BEIJING UNIV OF TECH
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