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Nickel-based brazing material and method for preparing alloy coating by nickel-based brazing material

A nickel-based solder and alloy coating technology, applied in the field of alloys, can solve problems such as difficult to form thicker coatings on the surface of workpieces, single corrosion-resistant environment, etc., achieve excellent corrosion resistance to various corrosive media, and coating thickness can be adjusted The effect of control and excellent braze coating process performance

Active Publication Date: 2013-02-27
湖南新光环科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a nickel-based solder and a method for preparing an alloy coating thereof, so as to solve the technical problem that the nickel-based solder has a single corrosion-resistant environment and is difficult to form a thicker and uniform coating on the workpiece surface in the prior art

Method used

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  • Nickel-based brazing material and method for preparing alloy coating by nickel-based brazing material
  • Nickel-based brazing material and method for preparing alloy coating by nickel-based brazing material

Examples

Experimental program
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Effect test

Embodiment

[0046] The binders in Examples 1-3 were purchased from Hunan Xinguanghuan Technology Development Co., Ltd., model: HJbinder-1208, and other materials and instruments are commercially available.

[0047] Will BNi 2 、BNi 5 、BNi 7 、BNi 12 、Ni 60 Mix the nickel-based brazing filler metal and the nickel-based brazing filler metal and binder of Examples 1 to 3 at a weight ratio of 1:1, stir evenly to obtain an alloy paste, and soak the ordinary No. 45 carbon steel workpiece in the alloy paste , after drying, place them in a vacuum brazing furnace or an ammonia decomposition atmosphere protection brazing furnace, carry out brazing coating and sintering treatment, and take out the furnace at 80°C to obtain a workpiece with an alloy coating. The corrosion resistance of each nickel-based alloy coating was tested respectively.

[0048] The symbol A indicates that the nickel-based solder is mixed with H at a mass concentration of 5%. 2 SO 4 Soak at 60°C for 24 hours

[0049] Symbo...

Embodiment 4

[0055] 1. Melting the nickel-based brazing filler metal of 2Kg embodiment 1 into an alloy liquid in a nitrogen protection environment, then carrying out the atomization cooling step with high-speed nitrogen gas to obtain a particle size of -150 object nickel-based brazing filler metal powder mixed with 8Kg of binder, Stir evenly to obtain alloy paste.

[0056] 2. Select No. 45 carbon steel pipes with an inner diameter of 30mm, a wall thickness of 2mm, and a length of 300mm for rust and oil removal, and then dry them to obtain clean carbon steel pipes.

[0057] 3. Soak the clean carbon steel pipe in the alloy paste to obtain the carbon steel pipe coated with the paste.

[0058] 4. Dry the carbon steel pipe coated with the alloy paste in a drying cabinet at 50° C. to obtain a dried carbon steel pipe.

[0059] 5. Put the dry carbon steel pipe in a brazing furnace protected by an ammonia decomposition atmosphere, adjust the sintering temperature to 1050°C for 15 minutes, and take...

Embodiment 5

[0061] 1. Melt 8Kg of the nickel-based solder of Example 2 into an alloy liquid in a vacuum, then use high-speed nitrogen to carry out the atomization cooling step to obtain a particle size of -150 mesh nickel-based solder powder mixed with 2Kg of binder, and stir evenly Obtain alloy paste.

[0062] 2. Select No. 45 carbon steel pipes with an inner diameter of 30mm, a wall thickness of 2mm, and a length of 300mm for rust and oil removal, and then dry to obtain a clean carbon steel pipe.

[0063] 3. Soak the clean carbon steel pipe in the alloy paste to obtain the carbon steel pipe coated with the paste.

[0064] 4. Dry the carbon steel pipe coated with the alloy paste in a drying cabinet at 70° C. to obtain a dried carbon steel pipe.

[0065] 5. Put the dry carbon steel pipe in the vacuum brazing furnace and start heating after vacuuming. The sintering temperature is 1090°C and the vacuum degree is 10 -1 Sintering at Pa for 30 minutes, and taking out the alloy-coated carbon ...

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Abstract

The invention provides a nickel-based brazing material, which comprises 15-30 wt% of Cr, 4.5-12wt% of P, 3-5wt% of Si, 2-4wt% of Mo, 2-4wt% of Cu, 0-0.5wt% of rare earth metal and the balance of Ni. The invention solves the technical problem that in the prior art, the nickel-based brazing material is single in the corrosion-resisting environment, so that a thicker and uniform coating is difficult to form on the surface of a workpiece.

Description

technical field [0001] The invention relates to the field of alloys, in particular to a nickel-based solder, and another aspect of the invention also provides a method for preparing an alloy coating from the nickel-based solder. Background technique [0002] Braze coating (braze coating) refers to the use of brazing methods to fuse special brazing alloys on the metal surface of the base metal to form a metal alloy coating that is metallurgically combined with the base metal and has wear-resistant or corrosion-resistant functions. [0003] At present, nickel-based solder alloy powder and nickel-based self-fluxing alloy powder are mainly used to manufacture corrosion-resistant alloy coatings by brazing coating. Typical nickel-based solders include Ni-Cr-Si series, Ni-Cr-Si-B series and Ni-Cr-P series, and the commonly used grades are BNi 5 、BNi 2 、BNi 7 and BNi 12 . Typical nickel-based self-fluxing alloy powders also belong to the Ni-Cr-Si-B alloy system, and the commonl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K1/00
Inventor 李昕
Owner 湖南新光环科技发展有限公司
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