Antioxidation coating material of Nano silicate in use for annealing billet in series

A technology of nano-silicate and anti-oxidation coatings, which is applied in the field of anti-oxidation coatings to solve the loss on ignition of hot-rolled steel billets. It can solve the problems of no site, unacceptable production volume, and inability to adapt to high temperatures, etc., and achieves service life. Improvement, easy access to raw materials, and low cost effects

Active Publication Date: 2009-07-08
沁阳市皇甫喷射防腐技术有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the technical problems of reducing the formation of scale and surface cracks in various series of steel billets such as stainless steel and ordinary steel in hot rolling annealing have been solved. The defects of the traditional method are: 1. The surface of the steel billet should be derusted before annealing, which is harmful to large Scale hot rolled steel industry and production volume requirements do not allow and no site
2. A certain amount of maintenance time is required, which cannot meet the production needs of the most common carbon billet series for hot rolling
3. It cannot adapt to the high temperature of 1250 °C, and the high temperature impact of about 1500 °C
[0004] After consulting the patent literature data, it is known that "anti-oxidation coating" (application number 88101985.2) can only be applied to the annealing and anti-oxidation of silicon steel slabs, and has not been pushed to the application of actual production so far; ) only shows that the temperature resistance is 800℃~1300℃, the maximum service temperature is 1500℃, and the accidents such as decarburization and steel sticking have been solved, and the reduction coefficient of loss on ignition and the actual technical effect of actual use are not reported; "pretreatment-free high-temperature anti-oxidation coating" (Application No. 93106060.5) The temperature resistance can only be used for a long time at 650 ℃ ~ 830 ℃, and the maximum use temperature is 1000 ℃, so far it has not been reported for actual use in production; medium-scale test of high-temperature anti-oxidation coatings for billets of the Institute of Process Engineering, Chinese Academy of Sciences (Science Times 2005.12.23) The literature reports only reduce the loss on ignition of ordinary steel billets to 65%, and there are no descriptions of the production and application of other stainless steel billets and special steel billets

Method used

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  • Antioxidation coating material of Nano silicate in use for annealing billet in series
  • Antioxidation coating material of Nano silicate in use for annealing billet in series
  • Antioxidation coating material of Nano silicate in use for annealing billet in series

Examples

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Effect test

Embodiment 1

[0037] Embodiment 1: prepare nano-silicate anti-oxidation coating (following percentage by weight).

[0038] (1) Prepare modified potassium water glass: get potassium water glass modulus (molar ratio) to be 1.35, specific gravity 1.53g / cm 3 100 g of potassium water glass was mixed with 65 g of high alumina powder with a particle size of 50 nanometers, and stirred and reacted for 50 hours at 100° C. to obtain modified potassium water glass.

[0039] (2) Prepare modified sodium water glass: get sodium water glass modulus (molar ratio) as 4.5, specific gravity 1.35g / cm 3 100 g of sodium water glass was mixed with 0.1 g of zirconia with a particle size of 50 nanometers, and stirred and reacted for 50 hours at 100° C. to obtain modified sodium water glass.

[0040] (3) Preparation of modified lithium water glass: get silicon dioxide containing 30%, lithium containing 2%, specific gravity 1.18g / cm 3 Lithium water glass 100g is mixed with the chromium oxide 0.1g powder of particle ...

Embodiment 2

[0047] Embodiment 2: preparation nano-silicate anti-oxidation coating (below is weight percent)

[0048] (1) Prepare modified potassium water glass: get potassium water glass modulus (molar ratio) to be 1.35, specific gravity 1.53g / cm 3 100 g of potassium water glass was mixed with 65 g of high alumina powder with a particle size of 50 nanometers, and stirred and reacted for 50 hours at 100° C. to obtain modified potassium water glass.

[0049] (2) Prepare modified sodium water glass: get sodium water glass modulus (molar ratio) as 4.5, specific gravity 1.35g / cm 3 100 g of sodium water glass was mixed with 0.1 g of zirconia powder with a particle size of 50 nanometers, and stirred and reacted for 50 hours at 100° C. to obtain modified sodium water glass.

[0050] (3) Preparation of modified lithium water glass: get silicon dioxide containing 30%, lithium containing 2%, specific gravity 1.18g / cm 3 100 g of lithium water glass, mixed with 0.1 g of chromium oxide powder with a ...

Embodiment 3

[0058] (1) Prepare modified potassium water glass: get potassium water glass modulus (molar ratio) to be 1.35, specific gravity 1.53g / cm 3 100 g of potassium water glass was mixed with 65 g of high alumina powder with a particle size of 50 nanometers, and stirred and reacted for 50 hours at 100° C. to obtain modified potassium water glass.

[0059] (2) Prepare modified sodium water glass: get sodium water glass modulus (molar ratio) as 4.5, specific gravity 1.35g / cm 3 100 g of sodium water glass was mixed with 0.1 g of zirconia with a particle size of 50 nanometers, and stirred and reacted for 50 hours at 100° C. to obtain modified sodium water glass.

[0060] (3) Preparation of modified lithium water glass: get silicon dioxide containing 30%, lithium containing 2%, specific gravity 1.18g / cm 3 Lithium water glass 100g is mixed with the chromium oxide 0.1g powder of particle size 20 nanometers, at 100 ℃, stirring reaction 50 hours obtains modified lithium water glass.

[0061...

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Abstract

The invention relates to a nano-silicate anti-oxidation coating used for annealing a series of steel billets. The coating is composed of 20-30% composite binder, 8-12% composite phosphate curing Aluminosilicate filler composition. Its characteristics: 1. Temperature resistance 1500 ℃; 2. No surface treatment in any way. The surface of the direct-sprayed steel billet is solidified at room temperature for ten minutes, collides and rubs against each other, making it difficult to be soft and hard; 3. All kinds of steel billets sprayed are quenched in water for a few seconds before annealing and hot rolling. Bell paint is self-detaching, self-departing without leaving paint traces, and improves the surface quality; 4. It can reduce the loss on ignition of various steels; 6. It can also be used for surface protection of refractory materials for furnace linings in various fields; industrial and civil fields as internal and external Wall coatings; bridges, piers, dams and other metal structures in the field of cement construction are waterproof, anti-corrosion, anti-oxidation, and have the unique performance of seawater resistance.

Description

(1) Technical field [0001] The invention discloses an anti-oxidation paint, in particular to an anti-oxidation paint for solving the loss on ignition of a hot-rolled billet. (2) Background technology [0002] The defects in the existing annealing and hot rolling production technology are as follows: the loss on ignition is 3.1-3.5% for common steel billet series, carbon steel billet series and high-quality steel billet series. The loss on ignition of the special steel billet series without protection is 1.01-1.81%. After hot-rolling various steel series billets, surface quality problems such as surface cracks and patterns in different degrees of 20% to 50% occur, which restricts the improvement of surface quality. [0003] At present, the technical problems of reducing the formation of scale and surface cracks in various series of steel billets such as stainless steel and ordinary steel in hot rolling annealing have been solved. The defects of the traditional method are: 1....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/70
Inventor 皇甫石金皇甫中杰
Owner 沁阳市皇甫喷射防腐技术有限公司
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