Stainless steel coating, preparation method thereof and preparation method of solid phase components

A stainless steel and coating technology, applied in the direction of coating, metal material coating process, heating inorganic powder coating, etc., can solve the problems of damage, easy oxidation, etc., to improve wetting performance, enhance water resistance, increase reactive effect

Active Publication Date: 2020-02-07
ENN SCI & TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention proposes a stainless steel coating, a method for preparing the stainless steel coating, and a method for preparing solid phase components, aiming at solving the problem that stainless steel is easily oxidized and its performance is damaged under a long-term high-temperature environment that requires thermal cycling. question

Method used

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  • Stainless steel coating, preparation method thereof and preparation method of solid phase components
  • Stainless steel coating, preparation method thereof and preparation method of solid phase components
  • Stainless steel coating, preparation method thereof and preparation method of solid phase components

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preparation example Construction

[0034] For another implementation based on the above-mentioned embodiment, refer to figure 1 As shown, a method for preparing a stainless steel coating is provided in this embodiment, comprising the following steps:

[0035] Step 1 S101: configuring slurry;

[0036] Step 2 S102: Cover the slurry on the stainless steel surface to form a thin film;

[0037] Step 3 S103: drying and sintering after film formation to form the stainless steel coating.

[0038] Specifically, the slurry is covered on the surface of the stainless steel by dipping, spraying or brushing to form the film. In Step 3 S103, the film is first dried at 80-100°C, and then sintered at 900-1000°C.

[0039] Specifically, the slurry mainly consists of 20-70 parts by weight of solid phase components and 30-80 parts by weight of organic solvent.

[0040] Specifically, the organic solvent is mainly composed of 40-80 parts by weight of terpineol, 3-10 parts by weight of ethyl cellulose, 5-20 parts by weight of xyle...

Embodiment 1

[0054] On the substrate of SUS410 stainless steel, a layer of glass ceramic coating with a thickness of 30 μm is applied on the surface by dipping method. The coating is mainly made of the following components by weight:

[0055]

[0056]

[0057] The mass ratio of impregnation slurry powder and organic solvent is 1:1; the organic solvent is mainly made of the following components by weight:

[0058]

[0059] After drying, pre-sinter at 600°C for 1 hour, and then sinter at 1000°C for 2 hours. The coated coating exhibits good oxidation resistance at 900°C and high temperature thermal cycle performance for a long time. The glass-ceramic coating is oxidized at 900°C for 24 hours, and the weight gain of the coating does not exceed 1%. After 82 cycles of cooling and heating at room temperature to 900°C, the coating has no cracking or peeling off. The uncoated SUS410 stainless steel is oxidized at 900 ° C for 12 hours, which will cause oxidative spalling.

Embodiment 2

[0061] On the substrate of SUS410 stainless steel, a layer of glass ceramic coating with a thickness of 80 μm is applied on the surface by dipping method. The coating is mainly made of the following components by weight:

[0062]

[0063] The mass ratio of the dipping slurry powder to the organic solvent is 2:1; the organic solvent is mainly made of the following components by weight:

[0064]

[0065] After drying, pre-sinter at 600°C for 1 hour, and then sinter at 1000°C for 2 hours. The coated coating exhibits good oxidation resistance at 900°C and high temperature thermal cycle performance for a long time. The glass-ceramic coating is oxidized at 900°C for 120 hours, and the weight gain of the coating does not exceed 1%. After 48 cycles of cooling and heating at room temperature to 900°C, the coating has no cracking or peeling off. The uncoated SUS410 stainless steel is oxidized at 900 ° C for 12 hours, which will cause oxidative spalling.

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Abstract

The invention provides a stainless steel coating. The stainless steel coating includes the following components: in parts by weight, 15-45 parts of SiO2, 10-20 parts of CaO, 5-17 parts of B2O3, 3-10 parts of Al2O3, 1-5 parts of Co2O3, 1-5 parts of Na2O, 15-40 parts of Cr2O3 and 3-6 parts of La2O3. The stainless steel coating has the advantages that bonding of the interface between the coating anda substrate is good, a glass phase in the coating is melted under the condition of high temperature sintering, and the surface defects of the substrate can be filled well so that generation of a gas phase interface between the substrate and the coating can be avoided; through control on the ratio of CaO to Na2O to Co2O3, a certain degree of chemical bonding between the coating and the substrate can be formed, and the bonding force between the coating and the stainless steel substrate is improved; and through addition of the materials, the stability and oxidation resistance of the stainless steel coating are improved greatly, and the stainless steel coating is prevented from cracking and peeling effectively.

Description

technical field [0001] The invention relates to the technical field of material plating, in particular to a stainless steel coating, a method for preparing the stainless steel coating and a method for preparing solid phase components. Background technique [0002] At present, stainless steel alloys are widely used in various fields such as metallurgy, machinery, military and aerospace due to their good mechanical properties and room temperature corrosion resistance. However, when used under high temperature conditions, due to the generation and shedding of oxide scales, the problem of oxidation and corrosion of stainless steel alloys is serious, which greatly affects the service life of structural parts. For example, SUS410 (nickel-free stainless steel) is a very commonly used martensitic stainless steel due to its high strength, large thermal conductivity, and small thermal expansion coefficient. The Cr content is between 10-30%, but when the temperature is higher than 900...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/622C23C24/08
CPCC04B35/14C04B35/622C23C24/082C04B2235/3217C04B2235/3201C04B2235/3275C04B2235/3241C04B2235/3227C04B2235/3409C04B2235/9607C04B2235/9684
Inventor 李营陈有鹏刘敏胜
Owner ENN SCI & TECH DEV
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