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Preparation method of sintering temperature-reducing high-temperature enamel coating

A technology of sintering temperature and high-temperature enamel, which is applied in the field of preparation of high-temperature enamel coatings, can solve the problems of high-temperature mechanical performance reduction and metal grain growth, and achieve the effect of solving mechanical performance reduction and avoiding metal grain growth

Active Publication Date: 2014-01-01
沈阳市航达科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the deficiencies of the prior art, to provide a method for preparing a high-temperature enamel coating that reduces the sintering temperature, and to realize sintering at the solution heat treatment temperature of austenitic metal materials below 1150°C, avoiding the sintering due to high sintering temperature Due to the growth of metal grains caused by the solution heat treatment temperature of austenitic metal materials, it solves the technical problem of reducing the mechanical properties of materials at high temperatures

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. Preparation of glass frit, its chemical composition (ratio by weight):

[0017] Quartz sand (SiO 2 ) 52.6, boron oxide (B 2 o 3 ) 7.0, barium oxide (BaO) 8.8, calcium oxide (CaO) 7.0, magnesium oxide (MgO) 1.8, aluminum oxide (Al 2 o 3 ) 19.3, titanium oxide (TiO 2 ) 3.5.

[0018] 2. The chemical composition of quartz sand requires SiO 2 ≥99%, Fe 2 o 3 <0.05%, the rest of the raw materials are chemically pure. Put all the raw materials of 10 kg glass frit into a crucible and melt it in a box-type electric furnace at 1700°C under the atmosphere. The melting temperature is controlled at 1600°C-1650°C. piece.

[0019] 3. Mechanically pulverize the glass frit, and then use a spherical tank grinder to grind the melted glass frit to make a powder of 0.1-5.0 μm, and then gravity separate the 0.1-0.3 μm (first Group), 0.3 ~ 1.0 μm (second group), 1.0 ~ 5.0 μm (third group) three particle sizes of glass frit powder. Then, the glass frit powders of three particle s...

Embodiment 2

[0025] 1. Preparation of glass frit, its chemical composition (ratio by weight):

[0026] Quartz sand (SiO 2 ) 53, boron oxide (B 2 o 3 ) 7.0, barium oxide (BaO) 8.8, calcium oxide (CaO) 7.0, magnesium oxide (MgO) 1.8, aluminum oxide (Al 2 o 3 ) 20.0, titanium oxide (TiO 2 ) 3.5.

[0027] 2. The chemical composition of quartz sand requires SiO 2 ≥99%, Fe 2 o 3 <0.05%, the rest of the raw materials are chemically pure. Put all the raw materials of 10 kg glass frit into a crucible and melt it in a vertical electric furnace at 1700°C under the atmosphere. The melting temperature is controlled at 1600°C to 1650°C. piece.

[0028] 3. Mechanically pulverize the glass frit, and then use a spherical tank grinder to grind the melted glass frit to make a powder of 0.1-5.0 μm, and then gravity separate the 0.1-0.3 μm (first Group), 0.3 ~ 1.0 μm (second group), 1.0 ~ 5.0 μm (third group) three particle sizes of glass frit powder. Then, the glass frit powders of three particle ...

Embodiment 3

[0034] 1. Preparation of glass frit, its chemical composition (ratio by weight):

[0035] Quartz sand (SiO 2 ) 52, boron oxide (B 2 o 3 ) 7.0, barium oxide (BaO) 8.8, calcium oxide (CaO) 7.0, magnesium oxide (MgO) 1.8, aluminum oxide (Al 2 o 3 ) 18.0, titanium oxide (TiO 2 ) 3.5.

[0036] 2. The chemical composition of quartz sand requires SiO 2 ≥99%, Fe 2 o 3 <0.05%, the rest of the raw materials are chemically pure. Put all the raw materials of 10 kg glass frit into a crucible and melt it in a box-type electric furnace at 1700°C under the atmosphere. The melting temperature is controlled at 1600°C-1650°C. piece.

[0037] 3. Mechanically pulverize the glass frit, and then use a spherical tank grinder to grind the melted glass frit to make a powder of 0.1-5.0 μm, and then gravity separate the 0.1-0.3 μm (first Group), 0.3 ~ 1.0 μm (second group), 1.0 ~ 5.0 μm (third group) three particle sizes of glass frit powder. Then, the glass frit powders of three particle siz...

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PUM

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Abstract

The invention relates to a preparation method of a sintering temperature-reducing high-temperature enamel coating. The method is characterized by comprising the following steps: firstly, melting glass frits which comprise the following chemical components in parts by weight: 52-53 parts of quartz sand, 6.8-7.5 parts of boric oxide, 8.6-9.0 parts of barium oxide, 6.8-7.5 parts of calcium oxide, 1.8-2.0 parts of magnesium oxide, 19.0-20.0 parts of aluminum oxide and 3.3-3.6 parts of titanium oxide; crushing and grinding the melted glass frits to prepare glass frit powder with three particle sizes, and then uniformly mixing the glass frit powder with three particle sizes in proportion; and adding chromium sesquioxide, cobaltous oxide and water in the grinding process of the glass frits for mixing, dispersing and grinding to prepare the sintering temperature-reducing enamel coating. The sintering temperature of the coating provided by the invention is 1050 DEG C and is reduced by 170 DEG C, and the coating subjected to a thermal shock test at 1000 DEG C after water cooling for five times is free from ceramic collapse and shedding phenomenon. Sintering is carried out below solid solution heat treatment temperature (1150 DEG C) of an austenite metal material. Metal grain growth as a result of the sintering temperature which is higher than the solid solution heat treatment temperature of the austenite metal material is avoided. The technical problem that the mechanical property of the material is reduced is solved.

Description

technical field [0001] The invention relates to a preparation method of an enamel paint, in particular to a preparation method of a high-temperature enamel paint capable of reducing the sintering temperature. Background technique [0002] Industrial gas turbine turbine rotors, combustors, tail nozzles and combustors of industrial exhaust burners work under high temperature and high pressure conditions, and their working temperatures are above 500°C, and can exceed 1000°C locally. The materials of the turbine rotor, combustion chamber and tail nozzle are generally stainless steel, heat-resistant steel or high-temperature alloy, all of which are austenitic metal materials. Under such harsh working conditions, thermal insulation coating technology must be used to ensure the reliability and service life of the work. [0003] In the prior art, special enamel glass coatings or ceramic coatings composed of metal oxides such as silicon dioxide, barium oxide, and calcium oxide are g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/14C03C8/02
Inventor 殷跃军韩长智
Owner 沈阳市航达科技有限责任公司