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A kind of surface protective coating for thermal processing of titanium alloy and its application

A technology for protective coatings and titanium alloys, applied in alkali metal silicate coatings, coatings and other directions, can solve the problems of unsatisfactory development of protective coatings for thermal processing of titanium alloys, achieve good anti-oxidation protection and alleviate environmental pollution problems , The effect of coating protection effect is good

Active Publication Date: 2016-01-27
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the development of protective coatings for thermal processing of titanium alloys in my country is not ideal, and the existing initial raw materials for the preparation of titanium alloy anti-oxidation coatings are analytically pure or industrially pure metal oxides and non-metal oxides , Moreover, in order to achieve the effect of low temperature and softening, a certain amount of lead element which is harmful to the environment is usually added to the coating components

Method used

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  • A kind of surface protective coating for thermal processing of titanium alloy and its application
  • A kind of surface protective coating for thermal processing of titanium alloy and its application

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Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1 A kind of surface protective coating for thermal processing of titanium alloy

[0029] (1) Preparation method

[0030] 1) Water glass binder: take 10g of Na 2 SiO 3 9H 2 O was added to 190ml of distilled water, stirring constantly, until Na 2 SiO 3 9H 2 After O is completely dissolved, add 2g of sodium polyacrylate to the solution and keep stirring for about 10min. Let it stand for 10 hours, and it can be used after the sodium polyacrylate is completely dissolved in the solution.

[0031] 2) Industrial waste: Mix boron mud powder and waste glass powder at a mass ratio of 1:2. Boron mud is the waste of the long borax factory in Dashiqiao City, Liaoning Province (main components: diboron trioxide 7.96wt.%, aluminum oxide 1.26wt.%, magnesium oxide 36.02wt.%, silicon dioxide 30.43wt.%. %, calcium oxide 0.88wt.%), waste glass is ordinary silicate glass (Na 2 O CaO 6SiO 2 ). Firstly, the boron mud and waste glass are pulverized, ball milled, and passed...

Embodiment 2

[0037] Embodiment 2 A kind of surface protective coating for thermal processing of titanium alloy

[0038] (1) Preparation method

[0039] 1) Water glass binder: take 10g of Na 2 SiO 39H 2 O was added to 190ml of distilled water, stirring constantly, until Na 2 SiO 3 9H 2 After O is completely dissolved, add 2g of sodium polyacrylate to the solution and keep stirring for about 10min. Let it stand for 10 hours, and it can be used after the sodium polyacrylate is completely dissolved in the solution.

[0040] 2) Industrial waste: mix boron mud powder and waste glass powder at a mass ratio of 1:3; both boron mud and waste glass are wastes of enterprises. Firstly, the boron mud and waste glass are pulverized, ball milled, and passed through a 100-mesh sieve, and the under-sieve is taken to obtain boron mud powder and waste glass powder respectively.

[0041] 3) Auxiliary filler: mix the under-sieved calcium oxide sieved through 200 mesh, the under-sieved titanium dioxide s...

Embodiment 3

[0046] Embodiment 3 A kind of surface protective coating for thermal processing of titanium alloy

[0047] (1) Preparation method

[0048] 1) Water glass binder: take 10g of Na 2 SiO 3 9H 2 O was added to 190ml of distilled water, stirring constantly, until Na 2 SiO 3 9H 2 After O is completely dissolved, add 2g of sodium polyacrylate to the solution and keep stirring for about 10min. Let it stand for 10 hours, and it can be used after the sodium polyacrylate is completely dissolved in the solution.

[0049] 2) Industrial waste: Mix boron mud powder and waste glass powder at a mass ratio of 1:4.5. Boron mud is the waste of the long borax factory in Dashiqiao City, Liaoning Province (main components: diboron trioxide 7.96wt.%, aluminum oxide 1.26wt.%, magnesium oxide 36.02wt.%, silicon dioxide 30.43wt.%. %, calcium oxide 0.88wt.%), waste glass is ordinary silicate glass (Na 2 O CaO 6SiO 2 ). Firstly, the boron mud and waste glass are pulverized, ball milled, and pass...

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Abstract

The invention relates to a surface protection coating for hot processing of a titanium alloy and application thereof. According to the adopted technical scheme, the surface protection coating for use in hot processing of the titanium alloy is prepared by mixing 10 parts by weight of water glass binder, 5-10 parts by weight of industrial waste and 4.5-10 parts by weight of auxiliary filler. The coating is painted on the purified surface of a titanium alloy substrate by adopting a painting method, naturally dried in the air for 1-2 hours, and placed into an air dry oven of 100 DEG C to be dried for 1-2 hours. The coating can form a continuous protection coating at a high temperature, so that high-temperature oxidation loss of the titanium alloy during hot processing is reduced effectively without changing the original performance of a titanium alloy workpiece substrate. The anti-oxidation coating for hot processing of the titanium alloy prepared by using the method has the advantages of environmental friendliness, low cost, easiness in construction, easiness in control over process conditions, and the like.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and in particular relates to a protective paint with anti-oxidation protection and self-stripping ability on the surface of titanium alloy during processing. Background technique [0002] Titanium alloy has the advantages of low density, good high temperature strength, strong creep resistance and high melting point, and has become a hot material in the aerospace industry and high-tech products. However, during the high-temperature heat treatment process, the surface of the titanium alloy undergoes an oxidation reaction with the oxygen in the atmosphere, forming a layer of oxide skin and a hard and brittle surface infiltration layer on the surface, which not only causes the loss of the titanium alloy accounting for more than 2.2% of the feeding amount. , and it will cause great difficulties to the subsequent thermal processing, and even make the entire alloy workpiece scrapped. Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/04C09D5/20
Inventor 李超田文远马卫园辛娜张茜
Owner LIAONING UNIVERSITY
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