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Heat-insulating coating material for firing enamel on surface of titanium alloy and preparation method thereof

A technology of thermal insulation coating and titanium alloy, which is applied in the field of firing enamel thermal insulation coating material and its preparation on the surface of titanium alloy, which can solve the problems of short service life of the coating and achieve good adhesion

Inactive Publication Date: 2014-12-10
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The MCrAlY cladding coating is to coat a layer of MCrAlY intermetallic compound on the surface of the base alloy. The coating material prepared by this method just overcomes the disadvantage that the modified aluminide coating has a great influence on the mechanical properties of the base alloy. This coating At the same time, it has the functions of oxidation resistance and heat corrosion resistance, but there is serious interdiffusion between the MCrAlY coating and the substrate at high temperature, which will lead to the disadvantage of short service life of the coating

Method used

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  • Heat-insulating coating material for firing enamel on surface of titanium alloy and preparation method thereof
  • Heat-insulating coating material for firing enamel on surface of titanium alloy and preparation method thereof
  • Heat-insulating coating material for firing enamel on surface of titanium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] The chemical composition (by weight percentage) of the raw material formula of the titanium alloy enamel thermal insulation coating material is:

[0031] SiO 2 65

[0032] Al 2 o 3 2.0

[0033] B 2 o 3 4

[0034] CoO 1.5

[0035] TiO 2 4

[0036] CaO 2.3

[0037] NaNO 3 9

[0038] KMnO 4 2

[0039] ZrO 2 8

[0040] V 2 o 5 0.6

[0041] CaF 2 3.3

[0042] NiO 0.3.

[0043] After mixing the above raw materials, put them into the muffle furnace at 1350°C, heat preservation and melting at 1350°C for 4 hours, then discharge the material firstly through water quenching, and then air-dry in a hot air drying oven at 90°C for four hours to obtain a block-shaped enamel glaze .

[0044] Put the block enamel glaze into the ball mill, and add the following materials at the same time, the quality of the grinding material is compared with the enamel glaze: 5% clay, 0.5% bentonite, 8% cerium oxide, 3% yttr...

example 2

[0049] The chemical composition (by weight percentage) of the raw material formula of the titanium alloy enamel thermal insulation coating material is:

[0050] SiO 2 70

[0051] Al 2 o 3 2.0

[0052] B 2 o 3 3.0

[0053] CoO 1.0

[0054] TiO 2 5.0

[0055] CaO 2.0

[0056] NaNO 3 7.0

[0057] KMnO 4 2.9

[0058] ZrO 2 4.0

[0059] V2 o 5 0.5

[0060] CaF 2 2.0

[0061] NiO 0.6.

[0062] After mixing the above raw materials, put them into the muffle furnace at 1370°C, keep them warm at 1370°C for 4 hours, and then quench them with water, and then dry them in a hot air drying oven at 90°C for four hours to obtain a block-shaped enamel glaze. .

[0063] Put the block enamel glaze into the ball mill, and add the following materials at the same time, the quality of the grinding material is compared with the enamel glaze: 5% clay, 0.5% bentonite, 8% cerium oxide, 3% yttrium oxide, 0.5% sodium silicon fl...

example 3

[0068] The chemical composition (by weight percentage) of the raw material formula of the titanium alloy enamel thermal insulation coating material is:

[0069] SiO 2 60

[0070] Al 2 o 3 2.5

[0071] B 2 o 3 5.0

[0072] CoO 2.0

[0073] TiO 2 6.0

[0074] CaO 3.0

[0075] NaNO 3 9.5

[0076] KMnO 4 4.0

[0077] ZrO 2 2.0

[0078] V 2 o 5 1.0

[0079] CaF 2 4.0

[0080] NiO 1.0.

[0081] After mixing the above raw materials, put them into the muffle furnace at 1370°C, keep them warm at 1370°C for 4 hours, and then quench them with water, and then dry them in a hot air drying oven at 90°C for four hours to obtain a block-shaped enamel glaze. .

[0082] Put the block enamel glaze into the ball mill, and add the following materials at the same time, the quality of the grinding material is compared with the enamel glaze: 5% clay, 0.5% bentonite, 8% cerium oxide, 3% yttrium oxide, 0.5% sodium silicon ...

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Abstract

The invention discloses a heat-insulating coating material for firing enamel on the surface of a titanium alloy and a preparation method thereof. The formula of the heat-insulating coating material comprises the following components: SiO2, Al2O3, B2O3, CoO, TiO2, CaO, NaNO3, KMnO4, ZrO2, V2O5, CaF2 and NiO. The preparation method comprises the following steps of: completely blending raw materials according to the formula, uniformly mixing through ball milling to melt into molten liquid, carrying out water quenching, and drying to obtain a massive enamel glaze; adding grinding additives, carrying out ball milling to obtain glaze slip, spraying to a titanium alloy substrate, and firing and preserving temperature to obtain an enamel coating on the titanium alloy substrate. According to the heat-insulating coating material, the weight increase of the enamel coating in 900 DEG C air oxidation is less than 0.1 mg / cm<2>, the weight loss of the enamel coating in 850 DEG C fused salt corrosion is less than 0.1 mg / cm<2>, the enamel coating has good adhesive force with a metal substrate, the temperature difference urgent change resistance is higher than 300 DEG C, and the mechanical shock resistance is more than 300*10<-3>J.

Description

technical field [0001] The invention belongs to the field of surface modification of high-temperature alloy materials, and in particular relates to a titanium alloy surface firing enamel heat-insulating coating material and a preparation method thereof. Background technique [0002] Titanium alloys have been widely used in the aerospace field due to their high specific strength, specific stiffness, good corrosion resistance and oxidation resistance and other excellent properties. However, titanium alloy materials have poor resistance to high temperature oxidation, especially molten salt hot corrosion, which limits their use in high temperature applications. [0003] In order to improve the high temperature oxidation resistance of titanium alloys, applying protective coatings on the surface of titanium alloy substrates has become a new direction for the development of titanium alloys. The high-temperature protective coatings on the surface of titanium alloys can be roughly d...

Claims

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Application Information

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IPC IPC(8): C03C8/00C23D5/00
Inventor 董永全高小育李钦培邹林李凌峰
Owner NANCHANG HANGKONG UNIVERSITY
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