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Hole array steel surface composite coating and preparation method thereof

A technology of surface compounding and hole array, which is applied in the coating, metal material coating process, etc., can solve the problems of low coating structure hardness, high wear, and large friction coefficient, so as to optimize the coating structure and prolong the service life , good effect

Active Publication Date: 2019-06-21
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the traditional steel coating preparation process, a single alloy coating or ceramic coating is used as a functional modification coating to improve the wear resistance of steel, but the prepared coating structure has low hardness, high friction coefficient and high wear.

Method used

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  • Hole array steel surface composite coating and preparation method thereof

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preparation example Construction

[0029] The invention provides a method for preparing a composite coating on a steel surface with a hole array, which comprises the following steps:

[0030] Process the steel surface to obtain surface steel holes arranged in parallel in a lattice;

[0031] Combine Ti powder, Cr powder, Al powder and Cr 3 C 2 After the powder is mixed, sintered to obtain (Ti x ,Cr 1-x ) 3 AlC 2 Solid solution composite powder;

[0032] Put the (Ti x ,Cr 1-x ) 3 AlC 2 The solid solution composite powder is etched with an etching solution to obtain (Ti x ,Cr 1-x ) 3 C 2 Powder

[0033] After mixing Ti powder and Si powder, sintering to obtain Ti-Si pre-alloy powder;

[0034] Will Ni 9 Cr 5 Al 5 Mo powder, (Ti x ,Cr 1-x ) 3 C 2 Powder, Ni powder coated MoS 2 Mixing the powder with the Ti-Si pre-alloy powder and B powder to obtain a mixed powder;

[0035] The mixed powder is pre-placed on the surface steel hole with an adhesive, and laser cladding and heat treatment are sequentially performed to obtain a comp...

Embodiment 1

[0074] press figure 1 As shown, the Q235 low-carbon steel surface line is cut into a sample with a size of 80mm×80mm×10mm, and then the surface steel holes with circular holes arranged in parallel in a lattice are processed. The diameter of the circular holes is 1.5mm, the depth is 0.9mm, and two The distance between the center of the hole is 6mm, the surface is polished to remove the surface oxide film, and cleaned with ethanol;

[0075] By atomic ratio (Ti 0.65 ,Cr 0.35 ) 3 AlC 2 Calculate and weigh Ti powder, Cr powder, Al powder, Cr 3 C 2 Powder, dry ball milling and mixing for 2 hours, the ball mill equipment is a planetary ball mill, the ball mill spindle speed is 350r / min, the filling factor is 0.4, the ball abrasive is agate balls, the ball mill tank is a nylon ball mill tank, protected by argon gas, and then the ball is ground. The powder is put into a graphite crucible covered with graphite paper and sintered in a vacuum furnace at 1380℃ for 2 hours to obtain (Ti 0.65 ,C...

Embodiment 2

[0083] press figure 1 As shown, the Q235 low-carbon steel surface line is cut into a sample with a size of 80mm×80mm×10mm, and then the surface steel holes with circular holes arranged in parallel in a lattice are processed. The diameter of the circular holes is 1.0mm, and the depth is 0.7mm. The distance between the center of the hole is 5mm, the surface is polished to remove the surface oxide film, and cleaned with ethanol;

[0084] By atomic ratio (Ti 0.5 ,Cr 0.5 ) 3 AlC 2 Calculate and weigh Ti powder, Cr powder, Al powder, Cr 3 C 2 Powder, dry ball milling and mixing for 0.5h, the ball mill equipment is a planetary ball mill, the ball mill spindle speed is 4500r / min, the filling factor is 0.4, the ball abrasive is agate balls, the ball mill tank is a nylon ball mill tank, protected by argon gas, and then the ball is ground. The powder is put into a graphite crucible covered with graphite paper and sintered in a vacuum furnace at 1350℃ for 3 hours to obtain (Ti 0.5 ,Cr 0.5 ) 3...

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Abstract

The invention provides a hole array steel surface composite coating and a preparation method thereof, and belongs to the technical field of metal surface engineering and high temperature coating preparation. By means of the hole array steel surface composite coating, two-dimensional carbide and sulfide which have good friction performance are double lubricating phases, the two-dimensional carbideis subjected to solid solution modification, the sulfide is subjected to encapsulation modification, and Fe-Ni, Ti-Ni, Ti-Si Fe-Si and TiB2 are used as combined reinforcing phases. Through the synergistic effect between functional unit phases, the self-lubricating wear resistance of steel is improved, the microhardness of the coating is improved, and the friction coefficient and the wear amount are reduced. Data of the embodiment show that the microhardness HV0.2 of the hole array steel surface composite coating prepared through the method is 850.6-894.7, and the friction coefficient is 0.3562-0.4277.

Description

Technical field [0001] The invention relates to the technical field of metal surface engineering and high-temperature coating preparation, in particular to a composite coating on the surface of a hole array steel and a preparation method thereof. Background technique [0002] With the development of modern industry, the performance requirements of mechanical products in the production process are getting higher and higher. Products run stably under high parameters (such as high temperature, high pressure, high speed, etc.) and harsh working conditions for a long time. Strength, wear resistance, corrosion resistance, etc. put forward higher requirements. Various mechanical equipment, instrumentation, metal parts in metallurgical parts, and various tools and molds often damage and fail from the surface first during use. A large part of the damage is caused by surface wear. Therefore, as long as the surface of the parts is strengthened, the performance requirements can be met. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 刘芳
Owner SHAANXI SCI TECH UNIV
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