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Highly wear resistant composite lining plate for ball mill and a preparation method thereof

A composite liner and ball mill technology, applied in metal material coating process, grain treatment, melt spraying and other directions, can solve the problems of difficult process control, complex coating process, high manufacturing cost, and achieve flexible adjustment of coating thickness. , Optimize the preparation process, the effect of simple process

Active Publication Date: 2018-05-22
湖南华民控股集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned method mainly has the following problems: 1. When conventional welding wire / electrode surfacing the lining plate, the base temperature is too high, the dilution rate of the base metal is > 5%, and the process control is difficult; The cost is high, and it is not suitable for large-scale production of conventional parts (ball mill liners); 3. If the coating is prepared by ordinary thermal spraying, the coating process is complicated, and the surface quality of the workpiece is high, and the interface bonding is mainly mechanical bonding ; 4. Although the prior art has mixed nickel-based and iron-based self-fluxing alloy powders with WC or TiC, the wear-resistant coating is prepared by vacuum sintering, but the sintering temperature is above 1050 ° C, and the temperature is too high. Unfavorable, and the cost of vacuum sintering is high for industrial scale production

Method used

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  • Highly wear resistant composite lining plate for ball mill and a preparation method thereof
  • Highly wear resistant composite lining plate for ball mill and a preparation method thereof
  • Highly wear resistant composite lining plate for ball mill and a preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0051] This embodiment relates to a high wear-resistant composite liner, the composite liner includes a base and a wear-resistant layer attached to the surface of the working surface of the base;

[0052] The base of the composite liner is cast high manganese steel;

[0053] The surface of the base working surface is clad with self-fluxing alloy powder Cr 13.5%, Si0.8%, C 0.52%, W 9%, B 1.5%, Mn 0.5%, Ni 0.5%, Mo1. 0%, the alloy layer formed by the rest of Fe.

[0054] The thickness of the base is 60 mm, and the thickness of the alloy wear-resistant layer is 3 mm. Its structural diagram is shown in figure 2 .

Embodiment 2

[0056] This embodiment relates to the preparation method of the composite liner described in Embodiment 1, comprising the following steps:

[0057] 1) Choose cast high manganese steel as the base, and use grinding to remove the oxide skin on the surface;

[0058] 2) In terms of mass percentage, Cr 13.5%, Si 0.8%, C 0.52%, W 9%, B 1.5%, Mn0.5%, Ni 0.5%, Mo 1.0%, and the rest of Fe are made into 80% by aerosol method. ~270 mesh pre-alloyed powder;

[0059] 3) Put the above powder into the plasma spray welding synchronous powder feeding system, control the plasma spray welding current to 200A, the powder feeding flow rate to 2.0kg / h, the plasma air flow to 5L / min, the walking speed of the spray gun to 120mm / min, and the swing range of the spray gun 10mm / pass, the interval between weld passes (103) is 2-3mm, and a layer of 3mm thick alloy wear-resistant layer is spray-welded on the base of the high manganese steel liner;

[0060] 4) Put the spray-welded lining board into a tempe...

Embodiment 3

[0063] This embodiment relates to a high wear-resistant composite liner, the composite liner includes a base and a wear-resistant layer attached to the surface of the working surface of the base;

[0064] The base of the composite liner is medium-carbon chromium-molybdenum cast steel, and a ∪-shaped groove (104) is cast on its working surface, the groove width is 12mm, and the depth is 1-2mm;

[0065] The grooves are filled with Cr 18%, Si 2%, C 3%, B 1.5%, Mn 1.0%, V 15%, and the rest is Fe, which is an alloy wear-resistant layer clad by plasma spray welding.

[0066] The thickness of the base is 80 mm, and the thickness of the alloy wear-resistant layer is 6 mm. Its structural diagram is shown in image 3 .

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Abstract

The invention relates to a highly wear resistant composite lining plate for a ball mill. The composite lining plate comprises a substrate and a wear resistant layer adhered on the surface of the worksurface of the substrate. The wear resistant layer is an alloy layer, which is formed by painting self-fluxing alloy powder on the surface of the work surface of the substrate through a plasma spray welding technology, wherein the self-fluxing alloy powder is composed of the following components in percentage by weight: 10 to 20% of Cr, 0.5 to 3.0% of Si, 0.5 to 3.5% of C, 0 to 10% of W, 0.5 to 3.0% of B, 0 to 15% of V, 0 to 1.0% of Mn, 0 to 1.0% of Ni, 0 to 1.0% of Mo, and the balance being Fe, and the total percentage by weight is 100%. The wear resistant layer is composed of iron based alloy powder, by adding a proper amount of WC / VC, the wear resistant performance of the lining plate is greatly improved, the matrix is mainly composed of martensite, the hardness and toughness are both taken into account, and the coated lining plate can be used in a ball mill.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a high wear-resistant composite liner for a ball mill. Background technique [0002] The cylinder liner of the ball mill is mainly subjected to the chiseling, cutting action and indirect impact of the grinding ball during the operation process, and its failure mode is mainly manifested as abrasive wear. [0003] At present, high-manganese steel and medium-carbon low-alloy wear-resistant cast steel are mostly used for liners, which are difficult to meet the requirements of actual complex working conditions. [0004] There are three surface strengthening technologies to improve the wear resistance of metal linings: one is wear-resistant surfacing, the other is high-energy particle beam (laser, plasma) cladding, and the third is vacuum sintering. The above-mentioned technologies all apply a layer of wear-resistant coating with better performance on the met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134C23C4/06C23C4/18B02C17/22
CPCB02C17/22C23C4/06C23C4/134C23C4/18
Inventor 昌盛邹月灿袁黎
Owner 湖南华民控股集团股份有限公司