Preparation method of dense high-temperature anti-decarbonization coating

An anti-decarburization coating and compact technology, which is applied in the field of steel processing, can solve the problems of affecting the performance of steel, easy decarburization, and reducing surface hardness, so as to improve compactness and mechanical properties, improve bonding and strength, and improve compactness performance effect

Active Publication Date: 2019-08-30
博罗县石湾镇东翔涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention: Aiming at the problem that the existing steel is very easy to decarburize when heated, and decarburization will greatly reduce its surface hardness and seriously affect the service performance of the steel, a preparation of a dense high-temperature anti-decarburization coating is provided method

Method used

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  • Preparation method of dense high-temperature anti-decarbonization coating

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example 1

[0029]According to the mass ratio of 1:1, 0.5mol / L magnesium sulfate solution and 0.2mol / L aluminum sulfate solution were stirred and mixed, and placed at 75°C for 25 minutes of heat preservation reaction to obtain a reaction mixture, and according to the mass ratio of 1:2, 0.95mol / L, a sodium silicate solution with a modulus of 1.02 was added dropwise to the reaction mixture, and the dropping rate was controlled at 2mL / min. After the dropwise addition was completed, stirred, mixed and kept warm for 2 hours, left to cool to room temperature, filtered and collected The filter cake was washed with deionized water until the washing liquid was neutral, then dried at 45°C for 6 hours, and ground through a 200-mesh sieve to obtain dense modified particles; weighed 45 parts of deionized water respectively , 10 parts of 200 mesh aluminum powder, 10 parts of mass fraction 1% hydrochloric acid are placed in a mixer, stirred and mixed to obtain a mixed sol solution, and then weighed 45 p...

example 2

[0031] According to the mass ratio of 1:1, 0.5mol / L magnesium sulfate solution and 0.2mol / L aluminum sulfate solution were stirred and mixed, and placed at 76°C for 26 minutes, and the reaction mixture was obtained. According to the mass ratio of 1:2, 0.95mol / L, a sodium silicate solution with a modulus of 1.02 was added dropwise to the reaction mixture, and the dropping rate was controlled at 2.2mL / min. After the dropwise addition was completed, the reaction was stirred, mixed and kept for 2.2 hours, left to cool to room temperature, and filtered And collect the filter cake, wash it with deionized water until the washing liquid is neutral, then dry it at 46°C for 6.2 hours, and grind it through a 200-mesh sieve to obtain dense modified particles; weigh 46 parts by weight Deionized water, 11 parts of 200-mesh aluminum powder, and 11 parts of 1% hydrochloric acid were placed in a blender, stirred and mixed to obtain a mixed sol solution, and then weighed in parts by weight 46 p...

example 3

[0033] According to the mass ratio of 1:1, 0.5mol / L magnesium sulfate solution and 0.2mol / L aluminum sulfate solution were stirred and mixed, and placed at 77°C for 27 minutes to react for 27 minutes to obtain a reaction mixture, and according to the mass ratio of 1:2, 0.95mol / L, a sodium silicate solution with a modulus of 1.02 was added dropwise to the reaction mixture, and the rate of addition was controlled at 2.5mL / min. After the dropwise addition was completed, the reaction was stirred, mixed and kept for 2.5 hours, left to cool to room temperature, and filtered And collect the filter cake, wash it with deionized water until the washing liquid is neutral, then dry it at 47°C for 7 hours, and grind it through a 200-mesh sieve to obtain dense modified particles; weigh 47 parts by weight. Ionized water, 12 parts of 200 mesh aluminum powder, 12 parts of mass fraction 1% hydrochloric acid are placed in a blender, stirred and mixed to obtain a mixed sol, and then weighed 47 pa...

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Abstract

The invention relates to a preparation method of a dense high-temperature anti-decarbonization coating, and belongs to the technical field of steel processing. The preparation method comprises the following steps that composite gel liquid is prepared from zirconium oxide and aluminum chloride as raw materials, so that a certain amount of linear structure exists in sol, and meanwhile, a polyvinyl alcohol solution is assisted to add and plays a framework function in the glue preparation process, aluminum/zirconium ions or colloidal particles are subjected to polycondensation reaction to generateorganic-inorganic hybrid molecular chains, linear and network structures are more, and after being calcined, the linear and network structures are effectively connected and form a dense coating structure. According to the preparation method, a diffusion channel of oxidizing gas is isolated through sintering between coating materials, and meanwhile, components are reacted to form a eutectic mixture, the eutectic mixture is in a molten state and forms an encrypted viscous coating film together with the softened potassium silicate, the coating is effectively formed on the surfaces of the materials, and the bonding and strength of the materials are improved through fiber winding, so that the compactness and the mechanical property of the materials are further improved.

Description

technical field [0001] The invention relates to a preparation method of a dense high-temperature anti-decarburization coating, which belongs to the technical field of steel processing. Background technique [0002] High-temperature heating of metal materials is a common processing method. For example, material heat treatment is to change the internal structure of the metal, eliminate material defects, and refine the crystal grains by heating, insulating and cooling the metal to produce a solid-state phase transition. Finally, the purpose of prolonging the service life of metal parts, environmental protection and energy saving is realized. When heated at high temperature, if the carbon element on the metal surface comes into contact with an oxidizing atmosphere, it will cause oxidation and decarburization. And the decarburization phenomenon is further aggravated with the increase of the concentration difference between the metal surface layer and the internal carbon element...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/70C21D6/00
CPCC21D1/70C21D6/00Y02P10/20
Inventor 郑云超
Owner 博罗县石湾镇东翔涂料有限公司
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