Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High temperature common mild steel anti-oxidation coating and application thereof

An anti-oxidation coating and low-carbon steel technology, applied in coatings, devices for coating liquid on the surface, etc., can solve the problems of non-universality, low application temperature, energy waste, etc., and achieve enhanced natural peeling ability, The effect of reducing high temperature oxidation burning loss and preventing penetration

Inactive Publication Date: 2007-10-24
INST OF PROCESS ENG CHINESE ACAD OF SCI
View PDF4 Cites 71 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects of low application temperature of existing coatings, resulting in energy waste, time-consuming and labor-intensive, and lack of universality, as well as the difficult pre-preparation process of raw materials in coatings, so as to provide a direct The high-temperature ordinary low-carbon steel anti-oxidation coating sprayed on the surface of the red-hot (below 1000°C) steel slab in front of the heating furnace in the hot rolling workshop. The high-temperature oxidation burning loss during the soaking process does not change the original properties of the billet substrate, and the coating has a strong ability to peel off naturally after heating; at the same time, the raw materials of the coating are easy to obtain, the cost is low, and the preparation process is simple, which can be widely used in various types of steel. Anti-oxidation when heated at 800-1300°C / 2-10 hours

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take zircon, albite, carbon black, borax, converter sludge, water glass, etc. according to dry powder chemical composition: 7% ZrO 2 , 16% Al 2 o 3 , 22% SiO 2 , 10% MgO, 4% B 2 o 3 , 8% CaO, 15% Fe 2 o 3 , 10% C, 8% Na 2 O were ground separately to below 100 mesh, mixed the materials, and added water to adjust the density of the final coating slurry to 1100kg / m 3 , Obtain the high-temperature common low-carbon steel anti-oxidation paint I of the present invention.

[0037] The paint is sprayed on the surface of the A36 billet at 800°C to form a layer of gray protective coating. After heat treatment, the oxide scale protected by the coating is significantly thinner than that without coating protection, and the oxidation burning rate is reduced by more than 60%, and the coating can be peeled off naturally. After peeling off, the surface of the substrate is uniform and smooth without residue .

Embodiment 2

[0039] Take zircon, albite, high alumina, coal powder, wollastonite, steel slag, water glass, etc. according to dry powder chemical composition: 10% ZrO 2 , 22% Al 2 o 3 , 35% SiO 2 , 5% MgO, 6% CaO, 12% Fe 2 o 3 , 5% C, 5% Na 2 O ratio, respectively grind to below 120 mesh, mix the materials, add water to evenly dilute until the density of the final coating slurry is 1500kg / m 3 , to obtain the high-temperature common low-carbon steel anti-oxidation coating II of the present invention.

[0040] Apply the paint to the surface of the Q235-B billet at 1000°C to form a layer of gray protective coating. After heat treatment, the oxide scale protected by the coating is significantly thinner than that without coating protection, and the oxidation burning rate is reduced by more than 70%, and the coating can be peeled off naturally. After peeling off, the surface of the substrate is uniform and smooth without residue .

Embodiment 3

[0042] Take zircon, potassium feldspar, high alumina, coke powder, wollastonite, borax, converter sludge, water glass, etc. according to dry powder chemical composition: 3% ZrO 2 , 20% Al 2 o 3 , 20% SiO 2 , 8% MgO, 6% B 2 o 3 , 10% CaO, 20% Fe 2 o 3 , 6% C, 4% K 2 O, 3% Na 2 O to mix the materials, grind the powder to 150 mesh, add water and stir evenly until the density of the final coating slurry is 1300kg / m 3 , to obtain the high-temperature common low-carbon steel anti-oxidation paint III of the present invention.

[0043] The paint is sprayed on the surface of A36 billet at 900°C to form a layer of gray protective coating. After heat treatment, the oxide scale protected by the coating is significantly thinner than that without coating protection, and the oxidation burning rate is reduced by more than 70%, and the coating can be peeled off naturally. After peeling off, the surface of the substrate is uniform and smooth without residue .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a common low-carbon steel anti-oxidizing paint under high temperature, which comprises the following steps: grinding ore powder with Al2O3, SiO2, Fe2O3, metallurgical waste, reducer with carbon and inorganic binder to below 100 orders separately; blending evenly; stirring the powder with water evenly; adjusting the quantity of added water to the density of paint slurry to 1100-1500kg / m3; spraying the steel blank (below 1000 deg. c) before heat by rolling furnace directly; forming continuous protective layer to avoid oxidizing and damaging in the soaking course; saving the cost.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a high-temperature common low-carbon steel anti-oxidation coating and its application. Background technique [0002] Before hot rolling, the steel billet needs to go through a long heating process in a high-temperature furnace at about 1250 ° C. This process makes the surface of the billet oxidize and burn very seriously, and the oxidation burn rate reaches 0.5-2.5%. In order to reduce the oxidation burning loss of the billet, it is usually necessary to brush the anti-oxidation coating on the surface of the billet to increase the yield and improve the quality of the steel. [0003] Chinese patent CN1632137A discloses a protective coating material to prevent oxidation / decarburization of steel workpieces during heat treatment heating, which consists of 10-20% glass powder, 33-30% quartz sand, 23-20% silica sand, 24-20% 20%Al 2 o 3 , Composed of 2-10% C, the coating material is suitable f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09D1/00B05D7/14
Inventor 叶树峰魏连启刘瑞斌蔡漳平陈运法谢裕生孙卫华
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com