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Coating material for replacing hard chromium plating and laser-cladding preparation method thereof

A coating material and laser cladding technology, applied in coating, metal material coating process, etc., can solve problems such as peeling, high pollution, bubbling, etc., and achieve the effect of large profit margin and low price

Active Publication Date: 2013-04-24
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the high pollution of the current traditional hard chromium plating technology and the problems of bubbling and peeling during use, a cheap coating material to replace hard chromium plating and a high-efficiency laser cladding preparation method are invented, which can obtain high-efficiency and Metallurgically bonded coating materials with excellent performance, meeting the needs of actual production for coating performance, bonding strength and production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Select a typical Fe-based material formula, C: 0.8 wt%, Cr: 4.0 wt%, Ni: 2.0 wt%, Si: 0.4 wt%, Mo: 5.0 wt%, W: 6.0 wt%, Mn: 0.3 wt%, balance Fe;

[0016] (2) The Fe-based alloy powder is obtained by argon atomization, and the powder with a particle size range of 10-50 μm is obtained after sieving;

[0017] (3) Select the heavy-duty engine piston ring groove as the strengthening object, and the piston material is 16CrMo4-4. Sandblast the area to be strengthened or repaired in the piston ring groove, and use compressed air to remove particles and debris, and then scrub the surface with alcohol ;

[0018] (4) Using the laser cladding process based on synchronous powder feeding technology to prepare Fe-based coating on the surface of the part to realize the strengthening or repair of the piston ring groove, the specific process parameters are set as follows: the output power of the semiconductor laser is 8 KW, and the rectangular spot size is 12×2 mm, the beam scannin...

Embodiment 2

[0027] (1) Select a typical Fe-based material formula, C: 0.90 wt%, Cr: 6.0 wt%, Ni: 2.5 wt%, Si: 0.6 wt%, Mo: 6.0 wt%, W: 8.0 wt%, Mn: 0.45 wt%, balance Fe;

[0028] (2) The Fe-based alloy powder is obtained by water atomization, and the powder with a particle size range of 10-50 μm is obtained after sieving;

[0029] (3) Select the piston rod of the construction machinery industry as the object to be strengthened. The material is 45 steel. Sandblast the part to be strengthened or the area to be repaired, and use compressed air to remove particles and debris, and then scrub the surface with alcohol;

[0030] (4) Use the laser cladding process based on synchronous powder feeding technology to prepare Fe-based coatings on the surface of piston rod parts to realize the strengthening or repair of parts. The specific process parameters are set as follows: the laser cladding power is 9 KW, and the rectangular spot is used , the spot size in the length direction is 16×3 mm, the bea...

Embodiment 3

[0039] (1) Select a typical Fe-based material formula, C: 1.0 wt%, Cr: 8.0 wt%, Ni: 3.0 wt%, Si: 0.8 wt%, Mo: 7.0 wt%, W: 10.0 wt%, Mn: 0.6 wt%, balance Fe;

[0040] (2) The Fe-based alloy powder is obtained by argon atomization, and the powder with a particle size range of 10-50 μm is obtained after sieving;

[0041] (3) Select the hydraulic prop in the coal machinery industry as the object of laser strengthening, and the material is 27SiMn. Sandblast the part to be strengthened or the area to be repaired, and use compressed air to remove particles and debris, and then scrub the surface with alcohol;

[0042] (4) The laser cladding process based on synchronous powder feeding technology is used to prepare Fe-based coatings on the surface of hydraulic prop parts by laser cladding to realize the strengthening or repair of parts. The specific process parameters are set as follows: the output power of CO2 laser is 10 KW, The size of the rectangular spot is 20 mm×4 mm, the scannin...

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Abstract

The invention provides a coating material for replacing a hard chromium plating and a laser-cladding preparation method thereof and relates to the field of iron-base alloy super-hard coating materials. The coating material comprises the following components in percentage by mass: 0.8-1.0 wt% of C, 4.0-8.0 wt% of Cr, 2.0-3.0 wt% of Ni, 0.4-0.8 wt% of Si, 5.0-7.0 wt% of Mo, 6.0-10.0 wt% of W, 0.3-0.6 wt% of Mn and the balance of Fe. The preparation method comprises the following steps: using metal raw materials to prepare Fe-based powder by using a water atomization or gas atomization method; screening the Fe-based powder so as to obtain powder with a particle size range of 10-50 microns; selecting a part to be reinforced as a substrate; carrying out sand blasting treatment on a part area to be reinforced or repaired; removing particle impurities of the part by using compressed air; scrubbing the surface of the part by using alcohol; preparing a Fe-based coating on the surface of the part by using a laser-cladding process based on a synchronous powder feeding technology so as to reinforce or repair the part; and carrying out follow-up mechanical grinding machining on the Fe-based coating so as to machine the part with the part size and desired roughness. According to the invention, requirements of actual production on the performance, bonding strength and production efficiency of the coating are satisfied.

Description

technical field [0001] The invention relates to an iron-based alloy superhard coating material and a preparation method thereof, more particularly to a hard chromium plating coating material which replaces traditional high pollution and a preparation method thereof. Background technique [0002] In petroleum exploration, mining machinery, construction machinery, coal mining industry, electric power and other industries, parts are often required to have excellent wear resistance and corrosion resistance, especially for parts with high precision, slight wear or corrosion, will It means the scrapping of parts, thus causing a waste of resources of a large amount of precious metal materials. The hard chromium plating process is a way commonly used by industrial enterprises to improve the wear resistance and corrosion resistance of materials. Its advantages are uniform chromium plating layer, high hardness and corrosion resistance, high production efficiency and low cost. Its dis...

Claims

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Application Information

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IPC IPC(8): C22C38/44C23C24/10
Inventor 杨胶溪胡星
Owner BEIJING UNIV OF TECH
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