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High-temperature nano-grade anti-carburizing material and coating, and application thereof

An anti-carburization and carbon coating technology, applied in the field of high-temperature resistant materials, can solve the problems of non-wetting, carburization, and air gap generation, and achieve the effects of low cost, high thermal conductivity, and elimination of air gap thermal resistance

Active Publication Date: 2012-02-15
SHILIN LUOHE METALLURGY EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to protect the cooling water pipes of blast furnace cast iron staves from carburization, adapt to harsh working environments, and increase their service life, a series of low-cost high-temperature nano-anti-carburization materials and their coatings have been successfully developed by using nanotechnology, mainly to solve the cooling stave. The main problems of carburization, non-wetting with molten iron and air gaps in the cooling water pipe during the stave casting process

Method used

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  • High-temperature nano-grade anti-carburizing material and coating, and application thereof
  • High-temperature nano-grade anti-carburizing material and coating, and application thereof
  • High-temperature nano-grade anti-carburizing material and coating, and application thereof

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Effect test

Embodiment 1

[0067] Embodiment 1: Formula of high-temperature nanometer anti-carburization material (slurry)

[0068] High temperature nanometer anti-carburizing material (slurry) formulations 1 and 2 are shown in Table 1 and Table 2, respectively.

[0069] Table 1 High temperature nanometer anti-carburization material (slurry) formula 1

[0070] raw material name Specifications (mm) content(%) Actual weighed weight (g) Remark Aluminum oxide 0.005 9.86 49.3 Chromium oxide 0.021 12.33 61.65 D01 Powder nanoscale 27.85 139.25 Titanium dioxide nanoscale 0.74 3.7 Silica powder nanoscale 12.33 61.65 liquid water glass industrial grade 20 129.6 sodium tripolyphosphate industrial grade 0.75 3.7 Alcohol Ester-12 industrial grade 13.32 66.6 Propylene Glycol industrial grade 3.82 19.1 Total 100 500

[0071] Note: "D01 powder" in the table refers to one of the se...

Embodiment 2

[0080] Embodiment 2: Nano-scale anti-carburization paint manufacturing process steps

[0081] The production process steps of nanometer anti-carburization coating are as follows:

[0082] According to the dosage of 500g, according to the actual weighing of proportioning 1 to proportioning 7 in the formula table of the above-mentioned embodiment 1, the powder part in various raw materials is weighed;

[0083] Add it to the test-type fine mill, then add zirconia balls with a diameter of 20mm, and discharge after 8 hours of electrified ball milling. The specification of the mixed powder is ≥600 mesh;

[0084] Weigh the mixed powder and liquid water glass, sodium tripolyphosphate, alcohol ester-12 and propylene glycol in proportion, put them into the mixing tank respectively, and use an adjustable stirrer to stir and mix for 30 minutes to form nano-scale anti-carburization Paint, then put into a storage container and ready to use.

Embodiment 3

[0085] Embodiment 3: the making of nanometer anti-carburization coating

[0086] 1. Single-coat production

[0087] Coating production: according to the formula table proportioning 1 of the above-mentioned embodiment 1 and the coating production process of the embodiment 2, 500g of the coating is produced;

[0088] Brushing process: Steel pipe blanking—sand blasting—painting with a thickness of 0.1mm—drying at 110°C for 2 hours. The sample is Nano 1#.

[0089] 2. Double coating production

[0090] Coating production: according to the above-mentioned embodiment 1 formula table proportioning 1, proportioning 2 and embodiment 2 coating production process respectively, make each 500g of coating;

[0091] Brushing process: Steel pipe blanking—sandblasting—brushing ratio 1 paint—3~5h natural drying—brushing ratio 2 paint—drying at 110℃×2h, and the sample is nanometer 2#.

[0092] 3. Anti-carburization experiment

[0093] Install carburizing box—heat carburizing in electric furn...

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Abstract

The invention discloses a high-temperature nano-grade anti-carburizing material, a coating formed with the material, and an application thereof. The material is formulated slurry. The slurry is sprayed and / or painted on a work-piece, such that a coating is formed. The coating is characterized in high-temperature carburization resisting, high thermal conductivity, and good bonding strength with substrate parts. When the coating is imbibed with molten iron, air gaps can be removed. When the coating is applied on the surface of a low-carbon steel part such as a cooling pipe of a cast iron cooling stave in a steel plant, carburization of the low-carbon steel part in a high-temperature carbon atmosphere is avoided. A main application scope of the material coating is that: slurry with the high-temperature nano-grade anti-carburizing material formulation can be sprayed and / or painted on surfaces of equipments / cooling pipes of cast iron cooling staves, and compact high-efficiency long-life anti-carburizing coatings are formed after curing; the slurry can be sprayed and / or painted on surfaces of large steel parts / forging dies, and decarbonization resisting coatings are formed after curing.

Description

technical field [0001] The invention discloses a high-temperature nanometer anti-carburization material, a coating and an application thereof, belonging to the technical field of high-temperature-resistant materials. Background technique [0002] Blast furnace cast iron cooling stave belongs to the cooling equipment of blast furnace body, and its structure is cast iron parts embedded with low-carbon seamless steel pipes. It is responsible for cooling the furnace body to protect the furnace shell and steel structure, support refractory materials and maintain a reasonable furnace shape. The cooling principle of the blast furnace cast iron stave is that the heat in the furnace is transmitted to the refractory lining, the cast iron matrix of the stave, and the seamless steel pipe wall in sequence, and finally the circulating cooling water in the steel pipe takes the heat out of the furnace. It can be seen that the main task of the blast furnace cast iron stave is to cool and dis...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/12C09D5/00B05D7/24B32B33/00
Inventor 冯力萧东山姚彦军张进程树森
Owner SHILIN LUOHE METALLURGY EQUIP
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