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New technology for preparing hard wear resistant coating through shaped charge detonation gun spraying

A technology of shaped charge and explosive spraying, which is applied in metal material coating process, coating, melting spraying and other directions, can solve the problems of uneven spray coating, small spraying area, and easy to form pits on the workpiece to be sprayed. Achieve the effect of preventing oxidative decarburization, large coating area and high bonding strength

Inactive Publication Date: 2011-11-23
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the disadvantages of the existing energy-concentrating explosive spraying technology due to the limitations of the powder loading method and the structure of the drug cover, the workpiece to be sprayed is easy to form pits, the sprayed coating is uneven, and the sprayed area is small, etc., and provides a A New Process for Preparing Hard Wear-Resistant Coatings by Explosive Spraying with Shaped Charge

Method used

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  • New technology for preparing hard wear resistant coating through shaped charge detonation gun spraying
  • New technology for preparing hard wear resistant coating through shaped charge detonation gun spraying
  • New technology for preparing hard wear resistant coating through shaped charge detonation gun spraying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The workpiece 7 to be sprayed is made of A3 steel with a size of 50 50 5mm 3 . Before spraying, the workpiece 7 to be sprayed is cleaned and pre-treated by sandblasting. The processed workpiece 7 to be sprayed is subjected to explosive spraying with concentrated charge, and the specific spraying process is completed by the following steps:

[0026] (1) Compression of shaped charge: put insensitive RDX 1 high-energy explosive 1 into a conical shaped charge mold, and press to a density of 1.3g / cm 3 , the conical shaped charge with a cone angle of 50° in the point 3 of the shaped charge, and an electric detonator is inserted in the detonator slot 2 of the shaped charge;

[0027] (2) Filling of the spraying powder 4: take the spraying powder 4 with a mass of 10% of the mass of the shaped charge and put it into the shaped hole 3 of the inverted shaped charge, so that the powder filling density is 2.5g / cm 3 , and then use the film 5 bonded to the inner wall of the ener...

Embodiment 2

[0032] The workpiece 7 to be sprayed is made of A3 steel with a size of 100 50 5mm 3 . Before spraying, the workpiece 7 to be sprayed is cleaned and pre-treated by sandblasting. The processed workpiece 7 to be sprayed is subjected to explosive spraying with concentrated charge, and the specific spraying process is completed by the following steps:

[0033] (1) Compression of shaped charge: put the insensitive Octojin high-energy explosive 1 into a linear shaped charge mold, and press it to a density of 1.5g / cm 31. A linear shaped charge with a taper angle of 60° in the point 3 of the shaped charge, and an electric detonator is inserted in the detonator slot 2 of the shaped charge;

[0034] (2) Filling of the spraying powder 4: take the spraying powder 4 whose mass is 30% of the mass of the shaped charge and put it into the gathering hole 3 of the inverted shaped charge, so that the powder filling density is 2.0g / cm 3 , and then use the film 5 bonded to the inner wall of...

Embodiment 3

[0039] The workpiece 7 to be sprayed is made of A3 steel with a size of 50 50 5mm 3 . Before spraying, the workpiece 7 to be sprayed is cleaned and pre-treated by sandblasting. The processed workpiece 7 to be sprayed is subjected to explosive spraying with concentrated charge, and the specific spraying process is completed by the following steps:

[0040] (1) Compression of shaped charge: put insensitive RDX 1 high-energy explosive 1 into a conical shaped charge mold, and press to a density of 1.6g / cm 3 1. The conical shaped charge with a cone angle of 40° in the point 3 of the shaped charge, and an electric detonator is inserted in the detonator slot 2 of the shaped charge;

[0041] (2) Filling of the spraying powder 4: take the spraying powder 4 whose mass is 20% of the mass of the shaped charge and put it into the gathering hole 3 of the inverted shaped charge, so that the powder filling density is 3.0g / cm 3 , and then use the film 5 bonded to the inner wall of the e...

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Abstract

The invention relates to a new technology for preparing a hard wear resistant coating through shaped charge detonation gun spraying and solves the defects of the conventional shaped charge detonation gun spraying technology that the workpiece to be sprayed is easy to have pits, the coating is uneven and the spraying area is small. The technology comprises the following steps: pressing shaped charge of which the density is 1.3-1.6g / cm<3> and the energy focusing cave cone angle is 40-60 degrees, then filling the WC-Co mixed powder of which the mass is 10-30% of the shaped charge and the density is 2-3g / cm<3> in the top of the energy focusing cave, fixing with a film, then arranging the shaped charge 200-400mm above the workpiece, covering a protective cover filled with inert gas outside the shaped charge and workpiece, and finally detonating the shaped charge to complete the spraying of the workpiece. The coating sprayed by the technology has the advantages of uniform surface, large area, low porosity, hardness, wear resistance and the like. In addition, the technology is simple, does not require large operation equipment and is suitable for industrialized spraying production.

Description

technical field [0001] The invention relates to the technical field of spraying, in particular to explosive spraying, in particular to a process for preparing a hard wear-resistant coating by explosive spraying of shaped charges. Background technique [0002] In modern industry, many mechanical parts often work in high-speed, high-temperature, high-pressure, highly corrosive environments, which cause wear, loss, and corrosion on the surface, resulting in failure of parts or the entire equipment. Therefore, researchers are actively developing effective surface modification technologies, and applying the best modification methods for different situations, so as to prolong the service life of equipment and reduce costs. [0003] As a basic method of material surface treatment, thermal spraying technology first appeared in Switzerland in the early 20th century, and then developed continuously in the former Soviet Union, Germany, Japan, the United States and other countries. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/12C23C4/06C23C4/126
Inventor 李如江刘晓红高永宏张晋红刘迎彬刘天生
Owner ZHONGBEI UNIV
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