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Alloy powder for circulating fluidized bed boiler water wall tube laser cladded coating

A technology of circulating fluidized bed and alloy powder, which is applied in the direction of coating, metal material coating process, etc., to achieve the effect of increasing oxidation resistance, improving corrosion resistance and wear resistance, high hardness and strength

Inactive Publication Date: 2012-07-11
上海大陆天瑞激光表面工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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Examples

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Effect test

example 1

[0028] 5000W CO with stable cladding performance 2 Laser, laser cladding designed cobalt-based alloy powder on the water-cooled wall tube (grade 20g) of the circulating fluidized bed boiler to form a protective coating. The mass percentage of alloying elements is: C: 1.1%; Cr: 30%; Ni: 2.6%; W: 3.8%; Mn: 0.25%; Si: 1.1%; B: 0.03%; Zr: 0.06; Ce: 0.03% ; Co: balance.

[0029]The cladding process parameters are: power: 2500-4500W, focal length: 300-4400mm, spot diameter: 3-46mm, scanning speed: 240-4400mm / min, powder thickness: 0.3-40.8mm.

example 2

[0031] 5000W CO with stable cladding performance 2 Laser, laser cladding designed cobalt-based alloy powder on the water-cooled wall tube (grade 20g) of the circulating fluidized bed boiler to form a protective coating. The mass percentages of alloying elements are: C: 1.2%; Cr: 31.5%; Ni: 3.0%; W: 4.4%; Mn: 0.35%; Si: 1.3%; B: 0.04%; Zr: 0.08; Ce: 0.03% ; Co: balance.

[0032] The cladding process parameters are: power: 2500-4500W, focal length: 300-4400mm, spot diameter: 3-46mm, scanning speed: 240-4400mm / min, powder thickness: 0.3-40.8mm.

example 3

[0034] 5000W CO with stable cladding performance 2 Laser, laser cladding designed cobalt-based alloy powder on the water-cooled wall tube (grade 20g) of the circulating fluidized bed boiler to form a protective coating. The mass percentage of alloying elements is: C: 1.3%; Cr: 33%; Ni: 2.6%; W: 4.8%; Mn: 0.3%; Si: 1.4%; B: 0.03%; Zr: 0.08; Ce: 0.04% ; Co: balance.

[0035] The cladding process parameters are: power: 2500-4500W, focal length: 300-4400mm, spot diameter: 3-46mm, scanning speed: 240-4400mm / min, powder thickness: 0.3-40.8mm.

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Abstract

The invention discloses alloy powder for a circulating fluidized bed boiler water wall tube laser cladded coating. The powder comprises the following components in percentage by mass: 1.0 to 1.6 percent of C, 28 to 34 percent of Cr, 2 to 5 percent of Ni, 3 to 8 percent of W, 0.2 to 0.5 percent of Mn, 1.0 to 1.4 percent of Si, 0.02 to 0.06 percent of B, 0.05 to 0.10 percent of Zr, 0.02 to 0.06 percent of Ce and the balance of Co. The powder is cladded on the surface of the water wall tube by laser to form the cobalt-base alloy coating with relatively high hardness, oxidation resistance, corrosion resistance, erosion wear resistance and excellent cladding performance. Therefore, the technical problem on corrosion resistance and wear resistance of a circulating fluidized bed boiler water wall tube is solved.

Description

Technical field: [0001] The invention relates to an alloy powder material suitable for laser cladding, in particular to an alloy powder used for laser cladding coating of circulating fluidized bed boiler water wall tubes, which belongs to C23C24 / 10 ( 2006.01) I technical field. Background technique: [0002] Circulating fluidized bed boiler is a new furnace type developed on the basis of bubbling fluidized bed boiler technology. Circulating fluidized bed combustion technology is an efficient and clean combustion technology developed rapidly in recent decades. It has special adaptability to fuels. Good, high combustion efficiency, low emission of gas pollutants, large load adjustment range and comprehensive utilization of ash and slag. This technology has been widely used in various fields such as power plant boilers, industrial boilers and waste treatment and utilization in various countries around the world. , especially in burning low-quality coal and oil shale, showing s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C19/07C22C30/00
Inventor 陈常义陈江
Owner 上海大陆天瑞激光表面工程有限公司
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