A kind of billet high temperature protective coating and its application

A technology of protective coatings and steel billets, applied in coatings and other directions, can solve problems such as not easy to peel off, and achieve the effects of maintaining compactness, bonding tightly, and ensuring compactness and integrity

Active Publication Date: 2017-11-07
SHIJIAZHUANG BINGXIN METALLURGICAL CHARGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a steel billet high temperature protective coating for solving the technical problems of surface decarburization in the heating process of the steel billet and the difficult peeling off of the iron scale dephosphorization, which can effectively reduce the surface decarburization layer of the special steel billet

Method used

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  • A kind of billet high temperature protective coating and its application
  • A kind of billet high temperature protective coating and its application
  • A kind of billet high temperature protective coating and its application

Examples

Experimental program
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Effect test

Embodiment 1

[0024] The application of the billet high-temperature protective coating of the present embodiment comprises the following steps: 45g SiC, 13g SiO 2 , 7gAl 2 o 3 , 3g Cr 2 o 3 . mm. Heat to 1250°C and keep for 2 hours. After the end, the thickness of the decarburized layer is detected to be 0.4mm.

Embodiment 2

[0026] The application of the billet high-temperature protective coating of the present embodiment comprises the following steps: 40g SiC, 10g SiO 2 , 13gAl 2 o 3 , 8g Cr 2 o 3 , 9g of blast furnace slag, 0.2g of sodium hexametaphosphate and 0.2g of cellulose are mixed evenly, and water (96.48g) is added according to the mass ratio of 1:1.2, and the machine is sprayed on the surface of 60Si2CrA steel billet after mixing evenly, and the coating thickness is 0.4mm . Heat to 1250°C and keep for 2 hours. After the end, the thickness of the decarburized layer is detected to be 0.4mm.

Embodiment 3

[0028] The application of the billet high-temperature protective coating of the present embodiment comprises the following steps: 35g SiC, 25g SiO 2 , 16gAl 2 o 3 , 6g Cr 2 o 3 , 5g of blast furnace slag, 0.2g of sodium hexametaphosphate and 0.2g of cellulose are mixed evenly, and water (61.18g) is added according to the mass ratio of 1:0.7. mm. Heat to 1250°C and keep for 2 hours. After the end, the thickness of the decarburized layer is detected to be 0.4mm.

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Abstract

The invention relates to a steel billet high-temperature protective coating and its application, and relates to a coating or cladding material temporarily applied before the heat treatment of the alloy, in particular to a pre-heat treatment for preventing high-temperature decarburization of the steel billet and reducing the difficulty of dephosphorization Coating or cladding material for temporary application. The purpose of the invention is to provide a steel slab high-temperature protective paint, which can effectively reduce the surface decarburization layer of the special steel slab. The billet high-temperature protective paint of the present invention comprises: 15-50 parts of SiC, 10-25 parts of SiO2, 5-20 parts of Al2O3, 3-10 parts of Cr2O3, 5-15 parts of blast furnace slag, 0.2 parts of sodium hexametaphosphate and 0.2 parts of cellulose. The coating of the invention can reduce the high-temperature oxidation and burning loss of the billet in the furnace, and at the same time alleviate the high-temperature depletion and decarburization of the alloy elements on the billet surface, overcome the difficulty of descaling the surface of special steel types, and modify the iron oxide scale by coating The resulting structure greatly improves the effect of high-pressure water descaling after the steel billet is released from the furnace. The invention is used in the field of rolling steel.

Description

technical field [0001] The invention relates to a coating or cladding material temporarily applied before heat treatment of an alloy, in particular to a coating or cladding material temporarily applied before heat treatment for preventing high-temperature decarburization of a billet and reducing the difficulty of dephosphorization. Background technique [0002] In foreign countries, the research on high-temperature anti-oxidation coatings for steel has already attracted people's attention. At present, countries and regions such as the United States, Japan, and Western Europe mostly use heat-resistant coatings based on metal oxides, glass-ceramics, and complex mixtures to prevent various carbon steels, alloy steels, etc. from rolling, forging, and heat treatment. high temperature oxidation occurs. For example, the ATP Metallurgical Coatings series of high-temperature anti-oxidation and decarburization coatings of Advanced Technical Products of the United States, the condursa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D7/12
Inventor 吴逸群常瑞欣窦光涛
Owner SHIJIAZHUANG BINGXIN METALLURGICAL CHARGE
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