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Preparation method of nickel, chromium, boron, silicon and niobium alloy abrasion-resistant coating

A nickel-chromium borosilicate and wear-resistant coating technology, which is applied in metal material coating process, coating, fusion spraying, etc., can solve the problem of decreased corrosion performance and fatigue performance of the coating, high brittleness of the hard phase, and increased cost and other issues, to achieve the effect of improving hardness and wear resistance, excellent wear resistance, and reducing heat input

Inactive Publication Date: 2018-11-02
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hard phase formed by this method is brittle and reduces the corrosion performance and fatigue performance of the coating. In addition, the coating needs to be primed with Ni / Al during the preparation process, which makes the process complicated and the cost increases.

Method used

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  • Preparation method of nickel, chromium, boron, silicon and niobium alloy abrasion-resistant coating
  • Preparation method of nickel, chromium, boron, silicon and niobium alloy abrasion-resistant coating
  • Preparation method of nickel, chromium, boron, silicon and niobium alloy abrasion-resistant coating

Examples

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Embodiment 1

[0035] The present embodiment 1 adopts nickel chromium borosilicate niobium (NiCrBSiNb) powder according to the composition ratio in the table below, the purity is 99% elemental Ni, Cr, Mn, Nb, and purity is 99.99% elemental B, Si, mix Afterwards, alloying treatment is carried out by high-energy ball milling to obtain alloy powder, that is, nickel chromium borosilicate niobium (NiCrBSiNb) powder with a thickness of 25-50 μm.

[0036] Table 1 Chemical composition of NiCrBSiNb (mass fraction, %)

[0037]

[0038] The purity of Ni, Cr, Mn and Nb is 99%, and the purity of B and Si is 99.99%.

[0039] The main steps include: quenching and tempering the 45 steel substrate → sandblasting the 45 steel substrate → feeding the arcing ion gas → powering the spraying equipment → starting the arc of the plasma spray gun → feeding the metal self-fluxing alloy for spraying into the plasma stream The powder is sprayed on the surface of the workpiece to form a nickel-chromium borosilicate ...

Embodiment 2

[0058] In Example 2, nickel chromium borosilicate niobium (NiCrBSiNb) powder is used, and nickel chromium borosilicate niobium (NiCrBSiNb) powder with a thickness of 25-50 μm is selected. Change the content of Cr, B, Si, Mn in the coating, the composition of this powder is shown in Table 3.

[0059] Table 3 Chemical composition of NiCrBSiNb (mass fraction, %)

[0060]

[0061] Other steps are the same as in Example 1. The resulting coating properties are close to Example 1.

Embodiment 3

[0063] In Example 3, nickel chromium borosilicate niobium (NiCrBSiNb) powder is used, and nickel chromium borosilicate niobium (NiCrBSiNb) powder with a thickness of 25-50 μm is selected. Change the content of Cr, B, Si, Mn in the coating, the composition of this powder is shown in Table 4.

[0064] Table 4 Chemical composition of NiCrBSiNb (mass fraction, %)

[0065]

[0066] Other steps are the same as in Example 1. The resulting coating properties are close to Example 1.

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Abstract

The invention provides a preparation method of a nickel, chromium, boron, silicon and niobium alloy abrasion-resistant coating. The method comprises the steps of 1, mixing the following powder in percentage by mass: 15-18% of Cr, 2-3% of B, 2-4% of Si, 1.5-2.5% of Mn, 4-8% of Nb, and the balance Ni, wherein the particle size of the powder is 25-50 microns; and 2: (1) hardening and tempering a substrate; (2) preprocessing the substrate surface by sand blasting; (3) performing plasma spraying on a substrate subjected to sand blasting; and (4) remelting a covered nickel, chromium, boron, siliconand niobium coating; and inductively heating through a high-frequency inductive heating device to obtain the nickel, chromium, boron, silicon and niobium alloy abrasion-resistant coating. According tothe method, the combination form of the coating and the substrate is changed, so that the combining intensity can be improved; and hard phases such as Nb2C in the coating is separated out, so that the abrasion life of the coating is prolonged.

Description

technical field [0001] The invention relates to the technical field of metal material surface coatings, in particular to a preparation method of a nickel-chromium-borosilicate-niobium (NiCrBSiNb) alloy wear-resistant coating. The present invention changes the bonding form of the coating and the substrate through induction remelting heating treatment, which is beneficial to the improvement of the bonding strength; many hard phases such as Nb appear inside the coating 2 C etc. have improved the hardness of the coating; the wear resistance of the coating has been greatly improved, which can effectively improve the wear life of the workpiece, so the present invention is mainly used in fields such as mechanization, iron and steel metallurgy, and mining. Background technique [0002] The surface wear of the workpiece is one of the most important reasons for the failure of the workpiece. The annual economic loss due to wear failure accounts for a large proportion of the national ec...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/06C23C4/18C23C4/02C22C19/05
CPCC22C19/058C23C4/02C23C4/06C23C4/134C23C4/18
Inventor 董天顺刘利李国禄李亚龙
Owner HEBEI UNIV OF TECH
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