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

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

Active Publication Date: 2015-06-24
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

[0015] 1. Preparation of glass frit, its chemical composition (ratio by weight):

[0016] 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.

[0017] 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.

[0018] 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

[0024] 1. Preparation of glass frit, its chemical composition (ratio by weight):

[0025] 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.

[0026] 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.

[0027] 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

[0033] 1. Preparation of glass frit, its chemical composition (ratio by weight):

[0034] 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.

[0035] 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.

[0036] 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

A method for preparing an enamel coating with reduced sintering temperature, which is characterized in that glass frit is first melted, and the chemical composition and weight ratio of the glass frit are as follows: quartz sand 52-53, boron oxide 6.8-7.5, barium oxide 8.6-9.0, Calcium oxide 6.8-7.5, magnesium oxide 1.8-2.0, aluminum oxide 19.0-20.0, titanium oxide 3.3-3.6; the melted glass frit is crushed and ground into three particle sizes of glass frit powder , and then uniformly mix the proportions of glass frit powders with three particle sizes; add chromium trioxide, cobalt oxide and water to mix and disperse and grind the glass frit during the grinding process to make an enamel coating that reduces the sintering temperature. The sintering temperature of the present invention is 1050°C, the sintering temperature is lowered by 170°C, and it can withstand the thermal shock test of heating at 1000°C and then water cooling for 5 times without porcelain chipping. The sintering is realized below the solid solution heat treatment temperature of 1150° C. for austenitic metal materials. It avoids the metal grain growth caused by the sintering temperature higher than the solution heat treatment temperature of the austenitic metal material, and solves the technical problem of the reduction of the mechanical properties of the material.

Description

Technical field [0001] The present invention involves a preparation method for enamel coatings, especially the preparation method that involves a high -temperature enamel coating that can reduce sintering temperature. Background technique [0002] The combustion room of industrial gas turbine rotor, combustion chamber, tail nozzle and industrial tail gas burner is working under high temperature and high pressure conditions. The operating temperature is above 500 ° C and the local area can exceed 1000 ° C.The materials for turbine rotors, combustion chambers, and tails are generally stainless steel, heat -resistant steel, or high -temperature alloy, which are all Austeine metal materials.Under such harsh conditions, the heat insulation coating technology must be used to ensure the reliability and service life of the work. [0003] Existing technology generally uses special enamel glass coating or ceramic coatings composed of metal oxides such as silicon, oxide, and calcium oxide a...

Claims

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Application Information

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Patent Type & Authority Patents(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