Ni3(Si,Ti)-TiC composite coating material and preparation method thereof

A coating material, nickel-silicon technology, applied in coating, metal material coating process, manufacturing tools, etc., can solve the problem of low toughness at room temperature and achieve uniform coating structure

Inactive Publication Date: 2008-04-16
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, hindering Ni 3 The bottleneck problem of the practical application of Si intermetallic compounds is their low room temperature toughness

Method used

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  • Ni3(Si,Ti)-TiC composite coating material and preparation method thereof
  • Ni3(Si,Ti)-TiC composite coating material and preparation method thereof
  • Ni3(Si,Ti)-TiC composite coating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Ti powder and C powder are proportioned according to the stoichiometric ratio of TiC, and the addition is controlled at 8wt% by weight; the remainder is that Ni powder, Si powder and Ti powder are proportioned by atomic percentage as Ni78Si13Ti9; in addition, Add 5ppm of B powder.

[0021] (2) The purity of Ni powder, Si powder, Ti powder, C powder and B powder is greater than 99%, and the particle size of the powder is 100-300 mesh.

[0022] (3) Put the mixed powder into a mortar, grind and mix evenly, and then dry it as a coating material. Laser multi-layer and multi-pass cladding is carried out in the way of pre-set powder.

[0023] (4) The laser process parameters are: output power 1000-1100W, scanning speed 4-6mm / s, spot diameter 4mm, each overlap 1.8mm.

[0024] The thickness of the prepared cladding layer is about 1.5mm, the Vickers hardness reaches 530Hv, and the main structure of the coating is Ni 3 (Si, Ti) intermetallic compound, Ni(Si) solid solution ...

Embodiment 2

[0026] (1) Ti powder and C powder are proportioned by the stoichiometric ratio of TiC, and the addition is controlled at 15wt% by weight; the remainder is that Ni powder, Si powder and Ti powder are proportioned by atomic percentage as Ni78Si13Ti9; in addition, Add 5ppm of B powder.

[0027] (2) The purity of Ni powder, Si powder, Ti powder, C powder and B powder is greater than 99%, and the particle size of the powder is 100-300 mesh.

[0028] (3) Put the mixed powder into a mortar, grind and mix evenly, and then dry it as a coating material. Laser multi-layer and multi-pass cladding is carried out in the way of pre-set powder.

[0029] (4) The laser process parameters are: output power 1100-1300W, scanning speed 4-6mm / s, spot diameter 4mm, each overlap 1.8mm.

[0030] The thickness of the prepared cladding layer is about 1.5mm, the Vickers hardness reaches 580Hv, and the main structure of the coating is Ni 3 (Si, Ti), Ni(Si), and TiC.

Embodiment 3

[0032] (1) Ti powder and C powder are proportioned according to the stoichiometric ratio of TiC, and the addition is controlled at 20wt% by weight; the remainder is that Ni powder, Si powder and Ti powder are proportioned by atomic percentage as Ni78Si13Ti9; in addition, Add 5ppm of B powder.

[0033] (2) The purity of Ni powder, Si powder, Ti powder, C powder and B powder is greater than 99%, and the particle size of the powder is 100-300 mesh.

[0034] (3) Put the mixed powder into a mortar, grind and mix evenly, and then dry it as a coating material. Laser multi-layer and multi-pass cladding is carried out in the way of pre-set powder.

[0035] (4) The laser process parameters are: output power 1300-1500W, scanning speed 4-6mm / s, spot diameter 4mm, each overlap 1.8mm.

[0036] The prepared cladding layer has a thickness of about 1.5mm and a Vickers hardness of 780Hv, such as figure 1 As shown, the main structure of the coating is Ni 3 (Si, Ti) and petal-shaped TiC.

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Abstract

The present invention relates to a nickel trisilicon titanium intermetallic compound-titanium carbide composite coating material and a method for preparing the same; a composite coating mainly consisting of Ni3(Si, Ti) intermetallic compound and TiC ceramic is made on a high-temperature ultratek substrate by laser cladding in situ; the coating material mainly comprises four elements: Ni, Si, Ti and C; the chemical components of the four elements have the following weight percentages: 8 percent to 20 percent Ti powder plus C powder; 78 percent Ni, 13 percent Si and 9 percent Ti; the preparation method adopts the laser to clad and has the following parameters: the output power is between 1000 W and 1500 W; the scanning speed is 4-6 mm/s. the spot diameter is 4 mm; the protective gas is Ar gas in cladding; the cladding substrate material is high-temperature ultratek; the invention has the following procedures: according to the mixture ratio, the coating material is mixed uniformly and pre-coated or hot-sprayed on the surface of the high-temperature ultratek substrate; the thickness is between 1 mm and 1.2 mm; the laser is adopted to have multilayer and multi-path cladding; each channel has related joint of 1.8 mm, thereby achieving the cladding layer with different thickness.

Description

technical field [0001] The invention relates to a nickel-silicon-titanium coating material and its preparation process, in particular to provide a coating material with high temperature resistance to sulfide corrosion, erosion and good wear resistance and the coating made on nickel-based superalloy , belonging to the field of intermetallic compound synthesis and coating preparation. Background technique [0002] to you 3 For Si, Ti and C are toughening elements (Yi Takasugi, M.Nagashima, O.Izumi, "Strengthening and ductilization of Ni 3 Si by the addition of Ti elements", Acta Metallurgica, 1990, v 38, n 5, p 747-755; Jason S.C. Jang, C.J Ou, C.Y. Cheng, "The evolution of microstructure change and mechanical properties for a nickel silicide based alloy doped with carbon and boron", Source: Materials Science and Engineering A, 2002, v 329-331, p455-460). TiC has a wide range of solid solubility and high free energy of formation, as well as its high hardness, Excellent wear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C23C30/00B23K26/34
Inventor 樊丁张建斌孙耀宁
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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