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A ball mill liner remanufactured surface coating part

A ball mill liner and surface coating technology, which is applied in coating, metal material coating process, grain processing, etc., can solve the problems of long redesign, etc., and achieve low equipment investment, high sphericity, and uniform coating structure Effect

Active Publication Date: 2017-04-05
ANHUI POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is a relatively long process from redesigning the chemical composition of the matrix material to production to actual production practice

Method used

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  • A ball mill liner remanufactured surface coating part
  • A ball mill liner remanufactured surface coating part
  • A ball mill liner remanufactured surface coating part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Ball mill liner remanufactured surface coating parts, including base and coating layer, the mass percentage of the base components is C0.30~0.44wt%, Si1.50~2.0wt%, Mn0.8~1.40wt%, Cr2 .0~2.8wt%, Mo≦0.3wt%, Ni≦0.3wt%, Re0.02wt%, P and S total 0.04wt%, the rest is Fe; the coating layer contains 97% WC- Co powder and 3% Cr, the Cr / Co weight ratio is 0.3; the WC-Co powder is evenly and discretely distributed in the coating.

[0071] The preparation method of the ball mill lining plate remanufacturing surface coating part, its steps are as follows:

[0072] a. Surface preparation: first, the surface of the base material should be cleaned with alcohol or acetone to remove oil stains, and then the surface to be sprayed should be roughened by sandblasting;

[0073] b. Preheat treatment: preheat the surface of the substrate before spraying. The preheating temperature is 200-300°C and the time is 60S, which can reduce the internal stress caused by the temperature difference betwe...

Embodiment 2

[0081] Adopt embodiment 1 method to react, and its difference is:

[0082] 1. Ball mill liner remanufactures the surface coating part, and the coating layer contains 98% WC-Co powder and 2% Cr by volume fraction, and the weight ratio of Cr / Co is 0.2; the WC-Co The powder is uniformly and discretely distributed in the coating.

[0083] 2. In step d, use the supersonic flame spraying technology to spray the ceramic working coating with a thickness of 250um on the part surface of the sprayed primer layer with the powder mixed with the coating layer; the rest are the same as in embodiment 1.

[0084] Compared with Example 1, due to less Cr element, the decarburization and oxidation of WC cannot be completely suppressed, so the porosity of the obtained coating is relatively high, reaching 4.4%. Cr is a corrosion-resistant element. The presence of Cr element greatly promotes the formation of passivation film. The reduction of Cr element leads to the reduction of the self-corrosion ...

Embodiment 3

[0086] Adopt embodiment 1 method to react, and its difference is:

[0087] 1. Ball mill liner plate remanufactures the surface coating part, and the described coating layer contains the WC-Co powder and the Cr of 4% that the volume fraction is 96%, and the weight ratio of described Cr / Co is 0.4; The WC-Co The powder is uniformly and discretely distributed in the coating.

[0088] 2. In step d, use the supersonic flame spraying technology to spray the ceramic working coating with a thickness of 275um on the part surface of the sprayed primer layer with the powder mixed with the coating layer; the rest are the same as in embodiment 1.

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Abstract

The invention discloses a ball mill liner remanufactured surface coating part and a manufacturing method thereof, which belong to the field of construction machinery remanufacture. It includes a substrate and a coating layer, and the mass percentage of the substrate composition is C0.30~0.44wt%, Si1.50~2.0wt%, Mn0.8~1.40wt%, Cr2.0~2.8wt%, Mo≦0.3wt %, Ni≦0.3wt%, Re0.02wt%, P and S total 0.04wt%, and the rest is Fe; the coating layer contains WC-Co powder with a volume fraction of 95-98% and 2-5% Cr , the Cr / Co weight ratio is 0.2-0.5. The invention can endow the parts with special properties such as wear resistance and corrosion resistance, improve the reliability of the parts and prolong the service life of the parts, especially the wear resistance of the working surface of the wear-resistant liner of the ball mill.

Description

technical field [0001] The invention belongs to the technical field of engineering machinery remanufacturing, and more specifically relates to a remanufactured surface coating part of a ball mill liner. Background technique [0002] Materials are one of the material basis for human survival and development. Today's society has regarded reducing material loss as a very important issue. The failure of mechanical parts mostly starts from the surface, and the surface strength of materials directly affects the service life of mechanical parts. According to incomplete statistics, the economic losses caused by friction and wear of various mechanical parts all over the world are as high as hundreds of billions of dollars every year. Since friction and wear occur on the surface of materials, it is a simple and effective method to optimize the design and preparation of the required wear-resistant coating on the surface of ordinary materials by using advanced surface technology. It ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/44C22C38/40C22C38/34C22C38/22C22C38/18C22C29/08C23C4/129C23C4/06B02C17/22
Inventor 朱协彬陈静顾小莉王刚蒋浩
Owner ANHUI POLYTECHNIC UNIV
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