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Method for preparing nickel-base amorphous alloy coating

An amorphous alloy and coating technology is applied in the field of preparation of nickel-based amorphous alloy coatings, which can solve the problems of complex preparation process and high cost, and achieve the effects of simple process, few steps and controllable particle size.

Inactive Publication Date: 2017-08-04
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating prepared by this method is firmly bonded, but the preparation process is complicated and the cost is high

Method used

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  • Method for preparing nickel-base amorphous alloy coating
  • Method for preparing nickel-base amorphous alloy coating
  • Method for preparing nickel-base amorphous alloy coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The mass percentage is: 2% gadolinium, 3% niobium, 10% boron, 12% silicon, 33% iron, 40% Ni elemental powder mixed, the particle size of each powder is between 150-200 mesh; The powder is mechanically ball milled, the speed of the ball mill is 600 rpm, and the ball milling time is 60 minutes. After the ball milling, it is dried at 150°C for 45 minutes; the nickel-based amorphous coating is directly prepared on the surface of the low alloy steel by using the simultaneous powder feeding laser cladding technology ;Laser cladding parameters are: laser power 12kW, spot diameter 1.5mm, scanning speed 8m / min, protective argon flow rate 22L / min, powder feeding rate 18g / min; the microhardness of the obtained cladding coating is as follows: figure 1 Shown in curve 1. The topography in the present embodiment is as shown in 1, from figure 1 It can be seen that the precipitated crystal phase structure appeared on the surface of the coating, and the crystal phase structure of the su...

Embodiment 2

[0030] The mass percentage is: 3 gadolinium, 3% niobium, 10% boron, 15 silicon, 34 iron, 35Ni elemental powder mixed, the particle size of each powder is between 150-200 mesh; the mixed elemental powder is mechanically ball milled, The speed of the ball mill is 600 rpm, the ball milling time is 60 minutes, and the ball milling is dried at 150°C for 45 minutes; the nickel-based amorphous coating is directly prepared on the surface of the low alloy steel by using the simultaneous powder feeding laser cladding technology; the laser cladding parameters For: the laser power is 13kW, the spot diameter is 2mm, the scanning speed is 9m / min, the protective argon gas flow rate is 22L / min, and the powder feeding rate is 18g / min; the microhardness of the obtained cladding coating is as follows: figure 1 Shown in curve 2.

Embodiment 3

[0032] The mass percentage is: 4 gadolinium, 5% niobium, 12% boron, 14% silicon, 35 iron, 30Ni mixed elemental powder, the particle size of each powder is between 150-200 mesh; the mixed elemental powder is mechanically ball milled , the speed of the ball mill is 600 rpm, the ball milling time is 60 minutes, and it is dried at 150°C for 45 minutes after ball milling; the nickel-based amorphous coating is directly prepared on the surface of low-alloy steel by using the synchronous powder feeding laser cladding technology; laser cladding The parameters are: laser power 12kW, spot diameter 1.5mm, scanning speed 8m / min, protective argon gas flow rate 22L / min, powder feeding volume 18g / min; the microhardness of the obtained cladding coating is as follows: figure 1 Shown in curve 3.

[0033] In summary, the cladding coating material prepared in this example has a very high hardness, reaching about 1200HV, and the average hardness obtained by the coating in Example 1 is the highest, ...

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Abstract

The invention belongs to the field of an amorphous coating, in particular to a method for preparing nickel-base amorphous alloy coating. The method comprises the steps: first, mechanically ball-milling and drying molten allow powder which is prepared from, by mass, 2-5% of gadolinium element powder, 3-5% of niobium element powder, 5-15% of boron element powder, 12-15% of silicon element powder, 31-35% of iron element powder and 30-44% of Ni element powder; then, utilizing the synchronous powder feeding and laser cladding technology, entering into a molten metal bath under laser radiation under the protection of argon gas, and forming the nickel-base amorphous alloy cladding coating. The technological parameters of the laser cladding technology are as follows: the laser power is 12-14kW, the spot diameter is 1-4mm, the scanning speed is 7-10m / min, the flow of protection argon is 20-30L / min, and the powder feeding rate is 15-25g / min. the preparation method has the advantages of high efficiency, low energy consumption, controllable particle size and flexible component adjustment, and the formed amorphous coating has high hardness.

Description

technical field [0001] The invention belongs to the field of amorphous coatings, in particular to a method for preparing nickel-based amorphous alloy coatings. Background technique [0002] Compared with traditional crystalline alloy materials, bulk amorphous alloy materials have obvious advantages in many aspects of performance, the main performances are as follows: (1) It has more excellent mechanical properties, such as high yield strength and large elastic strain Limit, basically completely elastic before yielding, basically completely plastic when yielding, no work hardening, high fatigue resistance and high wear resistance, etc. With the continuous emergence of bulk amorphous alloy systems, the strength of metal materials is constantly being refreshed. The strength of Mg bulk amorphous alloys has grown from the initial 600MPa to the current 800MPa. Cu-Fe-Ta- The strength of B alloy has reached 5000MPa, creating the highest strength record of metal materials in nature....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C45/02C22C45/04
CPCC23C24/106C22C45/02C22C45/04
Inventor 张培磊聂云鹏李雷庄乔乔
Owner SHANGHAI UNIV OF ENG SCI
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