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Corrosion resistant surface treatment method of chain parts

A surface treatment and parts technology, which is applied in the field of surface treatment of chain parts, can solve the problems of insufficient corrosion resistance and high cost of stainless steel chains, and achieve the effects of excellent corrosion resistance, high production efficiency and strong coating adhesion

Active Publication Date: 2014-03-12
东台市溱东科技发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of insufficient corrosion resistance of ordinary chain products in a corrosive environment and the high cost of stainless steel chains, by adopting the Fe-Al wear-resistant coating and preparation process of chain parts, and obtaining intermetallic compound coatings on the surface of chain parts , has the advantages of energy saving, material saving, and simple process, and can be used for corrosion-resistant treatment of the surface of chain parts

Method used

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  • Corrosion resistant surface treatment method of chain parts

Examples

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Effect test

Embodiment 1

[0018] Pretreatment of 20CrMnTi steel pins of 08B roller chains: after surface rolling, degrease with 10wt% NaOH aqueous solution at 60°C for 10 minutes and wash with water; derust with 5wt% HCl aqueous solution at 40°C for 10 minutes and wash with water; immerse the pins at a temperature of 80°C 10wt%NaCl+15wt%KF aqueous solution for 10min, drying; immersion in molten aluminum solution at 720°C for 5min, taking it out and cooling to room temperature in air; under argon, diffusion treatment at 850°C for 2h to obtain 87μm The intermetallic compound coating; oil quenching of the diffused pin shaft parts, followed by tempering at 200 ° C for 2 hours and then cooling.

Embodiment 2

[0020] Pretreatment of 16A roller chain 40Cr steel chain plate: after surface rolling, 20wt% NaOH aqueous solution at 50°C for 12 minutes, and water washing; 8wt% HCl aqueous solution at 50°C for 8 minutes, and water washing; 5wt%NaCl+3wt%KF aqueous solution for 20min, drying; immersion in molten aluminum solution at 750°C for 1min, taking it out and air cooling to room temperature; under protective atmosphere of argon, 900°C diffusion treatment for 1.5h, A 165 μm intermetallic compound coating was obtained; the diffused plate was directly oil-quenched, then tempered at 400°C for 2 hours and then cooled.

Embodiment 3

[0022] Pretreatment of 20A roller chain 20 steel sleeves and rollers: after surface tumbling, degrease with 15wt% NaOH aqueous solution at 60°C for 10 minutes and wash with water; derust with 20wt% HCl aqueous solution at 60°C for 5 minutes and wash with water; Help plating in 8wt%NaCl+9wt%KF aqueous solution at 75°C for 15min, dry; immerse in molten aluminum solution at 730°C for 3min, take it out and air cool to room temperature; in protective atmosphere of argon, 1000°C diffusion treatment After 30 minutes, a 176 μm intermetallic compound coating was obtained, followed by oil quenching and tempering at 200°C for 2 hours and then cooling.

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Abstract

The invention relates to surface treatment of chain parts, and particularly relates to a corrosion resistant surface treatment method of chain parts. A Fe-Al intermetallic compound corrosion resistant coating is obtained by adopting liquid state aluminum impregnation and following diffusion treatment for parts of a chain, such as a chain plate, a pin roll, a sleeve and a roller. The process flow comprises the following steps: pretreatment, aluminum impregnation, diffusion treatment and following quenching and tempering, wherein aluminum impregnation is performed in an aluminum liquid for 1-5 minutes at 720-750 DEG C; diffusion annealing is performed for 30 minutes to 2 hours at 850-1000 DEG C in a protective atmosphere; the intermetallic compound corrosion resistant coatings with different thicknesses are obtained by adjusting the temperature and time of diffusion treatment; after diffusion treatment, oil quenching is performed, and then tempering is performed for 2 hours at an intermediate temperature of 400-450 DEG C or a low temperature of 180-220 DEG C. The method provided by the invention has the characteristics of simple and convenient process, low cost, strong binding force of the coating, adaptability to batch production of small pieces and the like, can be used for producing chains in a corrosive environment, the treated chain can replace common chains or stainless steel chains, the performance and service life can be improved, and the alloy resources can be saved.

Description

technical field [0001] The invention relates to the surface treatment of chain parts, in particular to a corrosion-resistant surface treatment method for chain parts. Background technique [0002] Chain products are important mechanical basic parts. Chains include inner and outer chain plates, pins, sleeves, rollers, etc. The materials and heat treatment processes they use are usually as follows: the inner and outer chain plates are quenched of medium carbon steel or medium carbon low alloy steel. Add medium temperature tempering; pin shafts, sleeves and rollers are usually made of low carbon steel or low carbon low alloy steel after carburizing or carbonitriding and quenching and low temperature tempering process. Due to insufficient corrosion resistance, it fails early; stainless steel is usually used to prepare chain parts, but the main problem is that the cost of the chain is greatly increased, and the problems of insufficient strength and wear resistance have not yet be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/12C23C2/28
Inventor 王树奇张秋阳廖远禄陈康敏崔向红周银
Owner 东台市溱东科技发展有限公司
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