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Hot spraying metal ceramic powder for stove roller surface coatings

A technology of ceramic powder and cermet, which is applied in the field of surface coating of furnace rollers, can solve the problems of anti-pilling effect and weakened wear resistance of coatings, and achieve the effect of high temperature resistance and improved compactness.

Inactive Publication Date: 2008-05-28
SHANGHAI BAOSTEEL EQUIP MAINTENANCE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a thermal spray cermet powder for the surface coating of furnace rollers, which mainly solves the technical problem that the anti-build-up effect and wear resistance of existing coatings are weakened when high-strength steel plates are mass-produced

Method used

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  • Hot spraying metal ceramic powder for stove roller surface coatings

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Embodiment Construction

[0013] The protective coating on the surface of the cermet furnace roller is prepared by supersonic flame spraying method, and the thickness of the coating is about 0.15mm. The size of the anti-buildup sample is 50×50×10mm, and the material is 304 stainless steel. The specific method of the anti-build-up test: add a layer of MnO powder with a particle size of less than 44 μm on the surface of the coating. 2 -3%H 2 Atmosphere and 950°C for 48 hours, then take it out and analyze the tumor accumulation. The size of the coating friction and wear resistance sample is 12.32×12.32×19.05mm, and the material is 304 stainless steel; the size of the grinding pair is φ49.22×13.06mm, and the material is 45 quenched and tempered steel. The results are shown in the table below.

[0014]

[0015] Note: Symbol ○, △ respectively indicate the effect: good, average, slightly worse.

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Abstract

The invention relates to a furnace roller surface coating, in particular to a hot-spraying metal ceramic powder used for the furnace roller surface coating and mainly aiming at solving the technical problem that the anti-burl and wear-resistant capability of the existing coating can be reduced when a large quantity of high-strength steel plates are manufactured. The invention has the technical proposal that the hot-spraying metal ceramic powder used for the furnace roller surface coating consists of alloy powders and ceramic powders; the alloy powder is an alloy powder containing M, Cr, Al, Y and Ta; the ceramic powder consists of powders of ZrB2 and Cr3C2; a weight percentage of the alloy powder and the ceramic powder is that the alloy powder accounts to 89 to 75 percentage and the ceramic powder accounts to 11 to 25 percentage. The M, Cr, Al, Y and Ta alloy powder, against a gross weight of the metal ceramic powder, contains 13 to 25 percentage of Cr, 3 to 10 percentage of Al, 0.1 to 1 percentage of Y and less than 12 percentage of Ta, and the rest is M which is one of Co and Ni. In the ceramic powder, against a gross weight of the metal ceramic powder, the contents of ZrB2 and Cr3C2 are respectively 10 to 20 percentage and 1 to 5 percentage. The invention can be used for the furnace roller surface coating for a steel-strip continuous annealing production line.

Description

Technical field: [0001] The invention relates to a furnace roll surface coating, in particular to a thermal spraying cermet powder used for the furnace roll surface coating. Background technique: [0002] In order to obtain strip steel products with excellent properties, the strip steel usually needs to be heat treated in a continuous annealing furnace. The surface of the annealed steel strip must be free from defects such as scratches, stains or minor scars; at the same time, the original surface quality of the strip steel obtained in the hot and cold working process must also be maintained during annealing. Since the heat treatment is usually in a micro-oxidizing environment, the temperature is 600-1300 ° C, high-speed operation, and a certain tension load. Therefore, improving the surface condition of conveyor belt steel furnace rollers is not only the key to ensure the quality of continuous annealed steel strip, but also to meet the requirements of long life and high ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00C22C1/05
Inventor 毕刚郝荣亮张跃刚刘荣慧
Owner SHANGHAI BAOSTEEL EQUIP MAINTENANCE CO LTD
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