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Method for preparing TiC/Ni3Al intermetallic compound based surface composite coating

A technology of intermetallic compound and surface compounding, which is applied in heat exchange equipment, rotors, cylinders, etc., and can solve the problems of high cost, limited size and compounding position, and low production efficiency.

Inactive Publication Date: 2006-07-26
SUZHOU UNIVERSAL GRP TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of large equipment investment, high cost, low production efficiency, limited shape, size and composite position of components in the preparation of ceramic particle reinforced intermetallic compound-based composite coatings.

Method used

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  • Method for preparing TiC/Ni3Al intermetallic compound based surface composite coating
  • Method for preparing TiC/Ni3Al intermetallic compound based surface composite coating
  • Method for preparing TiC/Ni3Al intermetallic compound based surface composite coating

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Preparation of TiC(15wt%) / Ni 3 Al coating

[0022] Ti powder (500 mesh) with purity ≥99.8%, graphite powder (particle size ≤30μm) with purity ≥99.85%, Al powder (300 mesh) with purity ≥98% and Ni powder (200 mesh) with purity ≥99% , according to Ti, C, Al, and Ni as the molar ratio of 1:1 and 1:3 respectively, Ti, C accounted for 15% of the total amount of mixed powder, mixed powder on a planetary ball mill for 16 hours, and the ball-to-material ratio was 3 : 1. The evenly mixed powder is pressed into a φ20mm×2mm compact on a 10-ton press, with a density of 55%, and dried at 150°C for 5 hours in a vacuum state, and then pasted with 3% PVA aqueous solution to dry the prefabricated block in air The 12h sand mold wall, after preheating at 400°C for 30min, poured molten steel at a temperature of 1600°C, reaction compounding and densification occurred, and 15wt% TiC / Ni was obtained after solidification 3 Composite coatings on Al intermetallic-based surfaces.

Embodiment 2

[0024] Preparation of TiC(35wt%) / Ni 3 Al coating

[0025] Ti powder (300 mesh) with purity ≥99.8%, graphite powder (particle size ≤30μm) with purity ≥99.85%, Al powder (300 mesh) with purity ≥98% and Ni powder (200 mesh) with purity ≥99% , according to Ti, C, Al, Ni as the molar ratio of 1:1 and 1:3 respectively, Ti, C accounted for 35% of the total amount of mixed powder, mixed powder on a planetary ball mill for 20h, the ball-to-material ratio was 3 : 1. The evenly mixed powder is pressed into a compact of φ20mm×6mm on a 10-ton press, with a density of 58%, and dried under vacuum at 150°C for 5 hours, and then pasted with 3% PVA aqueous solution on the air-dried 12h The sand mold wall, after preheating at 400°C for 30 minutes, poured molten steel at a temperature of 1580°C, reaction compounding and densification occurred, and 35wt% TiC / Ni was obtained after solidification 3 Composite coatings on Al intermetallic-based surfaces.

Embodiment 3

[0027] Preparation of TiC(50wt%) / Ni 3 Al coating

[0028] Ti powder (300 mesh) with purity ≥99.8%, graphite powder (particle size ≤30μm) with purity ≥99.85%, Al powder (300 mesh) with purity ≥98% and Ni powder (200 mesh) with purity ≥99% , according to Ti, C, Al, and Ni as the molar ratio of 1:1 and 1:3 respectively, Ti and C account for 50% of the total amount of mixed powder, and mix the powder on a planetary ball mill for 24 hours, and the ball-to-material ratio is 3 : 1. The evenly mixed powder is pressed into a compact of φ20mm×10mm on a 10-ton press, with a density of 52%, and dried under vacuum at 150°C for 5 hours, and then pasted with 3% PVA aqueous solution on the air-dried 12h The sand mold wall, after preheating at 400°C for 30 minutes, poured molten steel at a temperature of 1550°C, reaction compounding and densification occurred, and 50wt% TiC / Ni was obtained after solidification 3 Composite coatings on Al intermetallic-based surfaces.

[0029] Depend on Fi...

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Abstract

The invention relates the Cast-SHS preparation technology used for TiC / Ni3Al surface composite coating. The technology comprises the following steps: using Ni, Al, Ti, C powders as raw material, mixing them in proper proportion, pressing them to form precast block, drying, stick organic binding agent on the mould wall; preheating mould, pouring molten steel, and forming the TiC / Ni3Al intermetallic compound surface composite coating on the surface of steel. By adjusting the powder composition, intermetallic compound surface composite coatings which contain different ceramic enhancement phase contents can be obtained. The method possesses the advantages of simple technology, low cost, strong binding force and good combination property.

Description

technical field [0001] The invention belongs to a material preparation technology, specially made TiC / Ni 3 Preparation method of Al intermetallic compound-based surface composite coating. Background technique [0002] The development of modern industry urgently needs components that can work under high temperature, corrosion and severe wear conditions, and it is increasingly difficult for a single steel material to meet the requirements. In most cases, the failure of components only occurs on some specific surfaces, but for components serving under heavy loads, the service life is not only related to the surface material and properties, but also to the mechanical properties of the matrix, especially the toughness. Therefore, the ideal component material should be wear-resistant, heat-resistant and corrosion-resistant materials on the surface or part of the component, while the component matrix still maintains the composition and structure of steel, with high strength and to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/04B22D19/00
Inventor 王树奇崔向红陈康敏金华军王峰
Owner SUZHOU UNIVERSAL GRP TECH CO LTD
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