Surface coating part for reproduction of ball mill liner plate and manufacturing method for 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 problem of long redesign, and achieve low equipment investment, low porosity, and excellent corrosion resistance. Effect

Active Publication Date: 2015-11-18
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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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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  • Surface coating part for reproduction of ball mill liner plate and manufacturing method for surface coating part
  • Surface coating part for reproduction of ball mill liner plate and manufacturing method for surface coating part
  • Surface coating part for reproduction of ball mill liner plate and manufacturing method for surface coating part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The preparation method of the ball mill lining plate remanufacturing surface coating part, its steps are as follows:

[0067] 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;

[0068] 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 between the coating and the substrate surface and prevent the coating from cracking. Cracking and peeling, while also removing moisture on the surface of the workpiece, accelerating the deformation of molten fine particles, and increasing the deposition rate;

[0069] c. Spray primer layer: use supersonic flame spraying technology to spray the mixed coating layer powder on the surface of the substrate with a thickness of 50-80mm after...

Embodiment 2

[0077] 1. The 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.

[0078] 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.

[0079] 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 decrease of Cr element causes the self-corrosion potential of WC-10Co-2Cr in 3.5wt% NaCl solution to decrease to -0.474V. Corrosion c...

Embodiment 3

[0082] 1. The ball mill liner remanufactures the surface coating part, the coating layer contains 96% WC-Co powder and 4% Cr by volume fraction, and the weight ratio of Cr / Co is 0.4; 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 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.

[0084] Example 4

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Abstract

The invention discloses a surface coating part for reproduction of a ball mill liner plate and a manufacturing method for the surface coating part, and belongs to the field of reproduction of engineering machines. The surface coating part comprises a substrate and a coating layer. The substrate comprises, by weight, 0.30-0.44% of C, 1.50-2.0% of Si, 0.8-1.40% of Mn, 2.0-2.8% of Cr, 0.3% of Mo or less, 0.3% of Ni or less, 0.02% of Re, 0.04% of P and S and the balance Fe. The coating layer comprises, by volume, 95-98% of WC-Co powder and 2-5% of Cr, and the weight ratio of Cr to Co is 0.2-0.5. The surface coating part for reproduction of the ball mill liner plate and the manufacturing method for the surface coating part can give the special properties like abrasion resistance and corrosion resistance to parts, improve the reliability of the parts, prolong the service life of the parts and especially improve the abrasion resistance of a work surface of the ball mill abrasion-resistant liner plate.

Description

technical field [0001] The invention belongs to the technical field of engineering machinery remanufacturing, and more specifically relates to a ball mill liner remanufacturing surface coating part and a manufacturing method thereof. 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 ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/44C22C38/40C22C38/34C22C38/22C22C38/18C22C29/08C23C4/12C23C4/06B02C17/22
Inventor 朱协彬陈静顾小莉王刚蒋浩
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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