In-situ synthesis TiB2/TiC reinforced Ti2Ni/TiNi biphase metal compound base composite coating and preparation method

A metal compound, in-situ synthesis technology, applied in the direction of metal material coating process, coating, etc., to achieve the effect of excellent wear resistance, low cracking sensitivity and high hardness

Active Publication Date: 2015-12-02
SHANGHAI UNIV OF ENG SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] The technical problem to be solved by the present invention is to overcome the defects existing in the preparation of pre-coating by the

Method used

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  • In-situ synthesis TiB2/TiC reinforced Ti2Ni/TiNi biphase metal compound base composite coating and preparation method
  • In-situ synthesis TiB2/TiC reinforced Ti2Ni/TiNi biphase metal compound base composite coating and preparation method
  • In-situ synthesis TiB2/TiC reinforced Ti2Ni/TiNi biphase metal compound base composite coating and preparation method

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Embodiment 1

[0044] a) Component design of cladding materials, design 4 different proportions of nickel-based alloy powder and carbide ceramic components as shown in Table 1:

[0045] Table 1 Different proportions of nickel-based alloy powder and carbide ceramic components

[0046] group design

NiCCrBSi(wt.%)

B 4 C (wt.%)

1

100

0

2

95

5

[0047] 3

85

15

4

75

25

[0048] b) The composite coating preparation process of component 1 comprises the following steps:

[0049] (1) Take the nickel-based alloy powder and the carbide ceramic powder in the above mass ratio, fully stir and grind the powder to form a uniform mixed powder;

[0050] (2) Using the improved pre-coating method on the titanium alloy Ti6Al4V substrate, a dense coating is pre-prepared on the titanium alloy substrate through a binder (polyvinyl alcohol), and the pre-coating is controlled The thickness is about 0.8mm;

[0051] (3) A li...

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Abstract

The invention relates to an in-situ synthesis TiB2/TiC reinforced Ti2Ni/TiNi biphase metal compound base composite coating and a preparation method thereof. The preparation method includes the steps that (1) nickel base alloy powder and carbide ceramic powder are sufficiently stirred and ground, and uniform mixed powder is formed; (2) a compact prefabricated coating is formed on a titanium alloy Ti6Al4V base; and (3) the prefabricated coating is subjected to laser cladding, and the in-situ synthesis TiB2/TiC reinforced Ti2Ni/TiNi biphase metal compound base composite coating which is uniform in structure, low in cracking sensibility and excellent in abrasion resistance is obtained. Compared with the prior art, the prepared composite coating is uniform in structure, high in hardness, low in cracking sensibility and excellent in abrasion resistance. The in-situ synthesis TiB2/TiC reinforced Ti2Ni/TiNi biphase metal compound base composite coating can be applied to titanium alloy parts working under the abrasion work condition on aerospace vehicles and naval vessels, and can be also applied to modification of titanium alloy parts of acid-resistant pumps and acid-resistant valves.

Description

technical field [0001] The invention relates to a preparation method of a dual-phase metal compound-based composite coating, in particular to an in-situ synthesis of TiB 2 / TiC reinforced Ti 2 Ni / TiNi dual-phase metal compound-based composite coating and its preparation method. Background technique [0002] Titanium alloys have the advantages of high specific strength and excellent corrosion resistance, and are widely used in aerospace, petrochemical, pharmaceutical and other industrial fields. However, its application is severely limited due to its low surface hardness and wear resistance. Therefore, improving the hardness and wear resistance of the titanium alloy surface has become a research hotspot. Using laser cladding technology to prepare a layer of high hardness and wear-resistant composite coating on the surface of titanium alloy can effectively solve the above problems. [0003] Laser cladding technology has the following outstanding advantages: [0004] (1) T...

Claims

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Application Information

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IPC IPC(8): C23C24/10
Inventor 邵锦钟李军宋睿白绿林陈佳丽曲翠翠
Owner SHANGHAI UNIV OF ENG SCI
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