Separant for removing red rust from high-temperature surface of silicon-containing steel and application method of separant

A release agent, high temperature technology, applied in the field of release agents, can solve the problems affecting the surface quality of the product, the strong adhesion of the substrate, the reduction of the steel yield, etc., and achieve the advantages of inhibiting the formation of fayalite, high protection temperature, and reducing oxidative burning loss. Effect

Inactive Publication Date: 2019-01-08
晋江市钫淦新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the heating process of the steel billet before rolling, the surface of the billet undergoes a severe oxidation reaction at high temperature, resulting in oxidation and burning, which reduces the yield of the steel. For silicon-containing steel, iron olive formed by the oxidation of silicon in the oxide scale Stone has a low melting point and strong adhesion to the substrate. High-pressure water descaling is difficult to remove. In addition, the downstream laminar water cooling process will form a large area of ​​red rust, which directly affects the surface quality of the product. It is a technical problem that plagues enterprises.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] According to the ratio of 15% vermiculite powder, 2% nano-magnesium silicate, 1% nano-chromium oxide, 30% mullite powder, 28% fly ash, 23% bauxite, and 1% cassava starch, the release agent is configured, of which nano-silicon The particle size of magnesium oxide and nano-chromium oxide is 400nm, the amount of water added is 60% of the above-mentioned total weight, the above-mentioned components are mixed in proportion, and the mechanical grinding and mixing method is used to mix evenly to obtain the high-temperature surface red rust-removing release agent of the present invention a.

[0018] Spray the high-temperature surface red rust removal release agent A on the surface of the rebar (20MnSi) square billet at room temperature, and wait for the release agent A to dry at room temperature for 35 minutes to form an isolation layer with a thickness of 150 μm. The sprayed rebar (20MnSi) square The billet and the unsprayed rebar (20MnSi) billet are put into the furnace at th...

Embodiment 2

[0020] According to the ratio of 28% vermiculite powder, 4% nano-magnesium silicate, 2% nano-chromium oxide, 35% mullite powder, 15% fly ash, 15.2% bauxite, and 0.8% tapioca starch, the release agent is configured; The particle size of magnesium oxide and nano-chromium oxide is 200nm, and water is a diluent, and the amount of water added is 70% of the above-mentioned total weight. The above-mentioned components are mixed in proportion, and mixed uniformly by mechanical grinding and mixing method to obtain the high-temperature surface red rust removal release agent B of the present invention.

[0021] Spray the high-temperature surface red rust removal release agent B on the surface of the silicon-containing (1.5%) automotive steel slab at room temperature, and wait for the release agent B to dry at room temperature for 42 minutes to form a 300μm-thick isolation layer. The sprayed silicon-containing ( 1.5%) automotive steel slabs and unsprayed silicon-containing (1.5%) automoti...

Embodiment 3

[0023] According to the ratio of 25% vermiculite powder, 1.5% nano-magnesium silicate, 3% nano-chromium oxide, 25% mullite powder, 25% fly ash, 20% bauxite, and 0.5% cassava starch; among them, nano-silicon The particle size of magnesium oxide and nano-chromium oxide is 100nm, and water is a diluent, and the amount of water added is 65% of the above-mentioned total weight. The above-mentioned materials are mixed in proportion, and mixed uniformly by mechanical grinding and mixing, to obtain the high-temperature surface red rust removal release agent C of the present invention.

[0024] Spray the high-temperature surface red rust removal release agent C on the surface of the spring steel 38Si7 billet at normal temperature, and the release agent C is dried at room temperature for 55 minutes to form an isolation layer with a thickness of 400 μm. The sprayed spring steel 38Si7 billet and the unsprayed spring steel 38Si7 The spring steel 38Si7 billet is put into the furnace at the ...

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Abstract

The invention relates to a separant for removing red rust from a high-temperature surface of silicon-containing steel and application of the separant. The separant comprises the following ingredientsby weight percentage: 10-30% of vermiculite powder, 1-5% of nano magnesium silicate, 1-5% of nano chromic oxide, 25-45% of mullite, 10-35% of pulverized fuel ash, 5-25% of laterite, 0.5-1% of cassavastarch and water serving as a diluent, wherein the weight of water accounts for 50-70% of total weight of the other ingredients. The separant with a particle size being less than 100 micrometers is prepared from the ingredients by a mechanical grinding and mixing method. The high-temperature oxidation separant is applicable to high-temperature protection for a silicon-containing steel billet during heating at 1000-1300 DEG C for 1-10h; the separant is sprayed on the surface of the room temperature steel billet and is 100-400 micrometers in thickness; the separant forms a glass-based protectionfilm in the process of heating up; the separant and oxidized scale on the surface of the steel billet can be completely removed by flushing with tap water or low-pressure water after the heating of the separant is finished; the red rust area on the surface of a hot rolled material is reduced; the surface quality of the rolled material is improved; and the use cost is low.

Description

technical field [0001] The invention relates to a release agent, in particular to a release agent for removing red rust on the high-temperature surface of silicon-containing steel and an application method thereof. Background technique [0002] During the heating process of the steel billet before rolling, the surface of the billet undergoes a severe oxidation reaction at high temperature, resulting in oxidation and burning, which reduces the yield of the steel. For silicon-containing steel, iron olive formed by the oxidation of silicon in the oxide scale Stone has a low melting point and strong adhesion to the substrate. High-pressure water descaling is difficult to remove. In addition, the downstream laminar water cooling process will form a large area of ​​red rust, which directly affects the surface quality of the product. It is a technical problem that plagues enterprises. Contents of the invention [0003] In order to overcome the above-mentioned deficiencies existin...

Claims

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Application Information

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IPC IPC(8): C21D1/70C21D8/12
CPCC21D1/70C21D8/1283
Inventor 莫爱萍沈白
Owner 晋江市钫淦新材料科技有限公司
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