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Continuous annealing furnace high-temperature furnace roller ZrB2 modified CoCrAlTaY-Y2O3 protective coating and preparation method thereof

A continuous annealing furnace and protective coating technology, applied in the coating, metal material coating process, furnace, etc., can solve the problems of shortening the service life of the coating, improve stability and service life, and have good high-temperature friction and wear properties Effect

Inactive Publication Date: 2020-01-03
ANHUI MA STEEL SURFACE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the Cr3C2 ceramic phase is higher than 850°C and during the supersonic spraying process, it will decompose and form a hard and brittle Cr7C3 phase, which will shorten the service life of the coating

Method used

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  • Continuous annealing furnace high-temperature furnace roller ZrB2 modified CoCrAlTaY-Y2O3 protective coating and preparation method thereof
  • Continuous annealing furnace high-temperature furnace roller ZrB2 modified CoCrAlTaY-Y2O3 protective coating and preparation method thereof
  • Continuous annealing furnace high-temperature furnace roller ZrB2 modified CoCrAlTaY-Y2O3 protective coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] like figure 1 as shown, figure 1 For the continuous annealing furnace high temperature furnace roll ZrB 2 Modified CoCrAlTaY-Y 2 o 3 Structural schematic diagram of protective coating; continuous annealing furnace high temperature furnace roller ZrB of the present invention 2 Modified CoCrAlTaY-Y2 o 3 The protective coating is provided as a double-layer structure of an adhesive layer 2 and a cermet working layer 3 on the substrate 1 . The cermet working layer 3 is better bonded to the substrate 1 through the bonding layer 2 .

[0037] The composition of the bonding layer 2 is NiCrAlY or NiCoCrAlY; the cermet working layer 3 is CoCrAlTaY-Y 2 o 3 -ZrB 2 , wherein the mass percentage of each component is: 50% to 63% of CoCrAlTaY, 21% to 30% of Y 2 o 3 , 16%~20% ZrB 2 ; That is, the cermet working layer 3 is (wt.%)(50~63)CoCrAlTaY-(21~30)Y 2 o 3 -(16~20)ZrB 2 ; The weight percent of each element in the binder phase and anti-oxidation phase CoCrAlTaY is: 50% to...

Embodiment 2

[0056] In this example, spray granulation is used to prepare 59CoCrAlTaY-25Y suitable for plasma spraying 2 o 3 -16ZrB 2 powder, the specific steps are:

[0057] S11, weigh CoCrAlTaY, Y according to a certain amount 2 o 3 and ZrB 2 The mixed powder is placed in a ball mill jar, and an appropriate amount of absolute ethanol and zirconia grinding balls are added. The mass ratio of mixed powder: absolute ethanol: grinding balls is 1: 1.2: 2. Milling at a ball milling speed of min for 12 hours to obtain a homogeneously mixed cermet mixture.

[0058] S12, adding a polyvinyl alcohol (PVA) solution with a mass concentration fraction of 10% to the cermet mixture to form a cermet slurry, and the solid content mass fraction of the polyvinyl alcohol (PVA) in the cermet slurry is 4 %, continue ball milling for 4 hours to obtain a uniformly mixed slurry with a certain viscosity.

[0059] S13, the slurry obtained in step S12 is spray-dried and granulated in LGZ-8 spray drying equipme...

Embodiment 3

[0072] In this example, spray granulation is used to prepare 55CoCrAlTaY-29Y suitable for plasma spraying 2 o 3 -16ZrB 2 powder, the specific steps are:

[0073] S11, weigh CoCrAlTaY, Y according to a certain amount 2 o 3 and ZrB 2 The mixed powder is placed in a ball mill jar, and an appropriate amount of absolute ethanol and zirconia grinding balls are added. The mass ratio of mixed powder: absolute ethanol: zirconia grinding balls is 1: 1.2: 2. Mill at a ball milling speed of 360r / min for 10 hours to obtain a uniformly mixed cermet mixture.

[0074] S12, adding a polyvinyl alcohol (PVA) solution with a mass concentration fraction of 10% to the cermet mixture to form a cermet slurry, and the solid content mass fraction of the polyvinyl alcohol (PVA) in the cermet slurry is 4 %, continue ball milling for 6 hours to obtain a uniformly mixed slurry with a certain viscosity.

[0075] S13, the slurry is spray-dried and granulated in LGZ-8 spray drying equipment. Wherein, ...

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Abstract

The invention discloses a continuous annealing furnace high-temperature furnace roller ZrB2 modified CoCrAlTaY-Y2O3 protective coating and a preparation method thereof. The protective coating is arranged as a double-layer structure of a bonding layer and a cermet working layer on a substrate, the component of the bonding layer is NiCrAlY or NiCoCrAlY, and the cermet working layer is CoCrAlTaY-Y2O3-ZrB2; the metal ceramic working layer comprises the following components of, in percentage by mass, 50%-63% of CoCrAlTaY, 21%-30% of Y2O3, and 16%-20% of ZrB2; and the bonding phase and the anti-oxidation phase CoCrAltaY comprises the the following elements of, in percentage by weight, 50%-69.5% of CO, 20%-30% of Cr, 7%-10% of Al, 3%-9% of Ta and 0.5%-1% of Y. The continuous annealing furnace high-temperature furnace roller ZrB2 modified CoCrAlTaY-Y2O3 protective coating does not generate Mn1.5Cr1.5O3 or MnAl2O4 nodulation materials in the high-temperature use process, the protective coatingand the preparation method thereof have anti-nodulation performance, the stability and service life of the protective coating is improved, and meanwhile, the protective coating has good high-temperature friction wear resistance.

Description

technical field [0001] The invention relates to the technical field of high-temperature coating protection, in particular to a high-temperature furnace roller ZrB of a continuous annealing furnace 2 Modified CoCrAlTaY-Y 2 o 3 Protective coating and preparation method. Background technique [0002] The high-temperature furnace roller is the key core equipment for the strip steel transmission of the continuous annealing unit. High-temperature furnace rolls are prone to friction and wear, nodules, and oxidation in long-term high-temperature, frictional service environments, resulting in strip scratches, white spots, pitting, etc. The higher the service temperature of the furnace roll, the softer the strip steel is in the furnace. Under the action of high temperature and heavy load, if there are small defects (such as nodules) on the surface of the furnace roll, it will easily affect the quality of the strip steel. [0003] In order to improve the surface quality of the furn...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/06C23C4/073C21D9/56C21D1/26
CPCC21D1/26C21D9/563C23C4/06C23C4/073C23C4/134
Inventor 倪振航薛召露王硕煜张世宏刘侠温永红吴朝军
Owner ANHUI MA STEEL SURFACE TECH CO LTD
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