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Composite treatment method for thermal spraying and electroplating of metal surface

A metal surface and composite treatment technology, applied in the field of metal surface treatment and surface protection coating, can solve the problems of poor anti-adhesion ability and short life, achieve good friction tension, excellent wear resistance, and improve anti-adhesion ability Effect

Inactive Publication Date: 2009-08-26
SHANGHAI BAOSTEEL EQUIP MAINTENANCE CO LTD
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Problems solved by technology

[0005] The invention aims to solve the defects of poor anti-adhesion ability and short life in the existing thermal spray coating instead of electroplating hard chrome layer, and provides a composite treatment method of thermal spray coating and electroplating on the metal surface. The invention makes the surface thermal spray coating Has excellent comprehensive performance: excellent wear resistance, impact resistance, roughness retention, and excellent surface anti-adhesion performance; to meet the long-term and stable actual production and use requirements of surface coated products

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  • Composite treatment method for thermal spraying and electroplating of metal surface

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Embodiment Construction

[0028] Below, the present invention will be further described in conjunction with specific embodiments:

[0029] In this embodiment, the preparation of coating on the surface of the process tension roller of the continuous large-scale production unit is taken as an example: the particle size of the thermal spraying coating powder material WC-12Co is 10--65 μm. Use Praxair / TAFA company supersonic spraying JP-5000 device to prepare coating, the process parameters are as follows: thermal spraying oxygen flow rate is 880-890 liters / minute, kerosene flow rate is 0.23-0.28 liters / minute, spraying distance is 350-390mm, thermal spraying Spray powder supply speed is 38-120 g / min, coating thickness is about 0.20mm.

[0030] Electroplating a layer of hard chrome on the surface of thermal sprayed WC-12Co cermet thermal sprayed coating, the main steps are as follows:

[0031] 1) Pretreatment before electroplating: cleaning and activation treatment.

[0032] Clean the coating surface wit...

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Abstract

The invention relates to metal working, in particular to a method for treating metal surface, which can be applied to (but not limited to) surface protection coatings of technological rolls for continuous production machine sets of steel enterprises. The invention provides a composite treatment method for thermal spraying and electroplating of metal surface, wherein the metal surface comprises a thermally-sprayed coating and a layer of electroplated plating. The treatment method comprises a step of thermally spraying the surface with a thermal spraying coating and a step of electroplating the surface of the thermal spraying coating with a layer of hard-chrome or nickel-base plating, wherein the thermal spraying coating comprises a base layer and a thermal spraying work surface layer. The method has the advantage of ensuring that the surface thermal spraying coating has excellent comprehensive performances such as excellent wear resistance, impact resistance, roughness maintaining capability and outstanding surface adhesion resistance so as to meet application requirements of surface-coated products on long-time steady actual production.

Description

technical field [0001] The invention relates to metal processing, in particular to a metal surface treatment method, which can be applied (but not limited to) to the surface protective coating of process rolls used in continuous production units of iron and steel enterprises. Background technique [0002] At present, the surface of the process rolls of the continuous production unit used in the domestic high-grade steel sheet cold rolling production line (such as Baosteel Baori Automobile Sheet Co., Ltd.) mostly adopts the method of electroplating hard chrome layer; however, although the anti-adhesion ability of the electroplated chrome layer is very good, Its wear resistance is not ideal enough, which greatly reduces the actual service life of the process roll. [0003] With the rapid development of modern thermal spraying technology, the use of thermal spraying coatings instead of hard chromium plating coatings not only has the same or even higher performance than hard chr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C23C4/00C25D3/04C25D3/12C25D5/00C23G1/02
Inventor 唐慧吴卫强毕刚顾轶蓉
Owner SHANGHAI BAOSTEEL EQUIP MAINTENANCE CO LTD
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