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Special low-crack-sensitivity and high-performance Ni-based composite powder for laser cladding

A technology of laser cladding and composite powder, which is applied in the direction of metal material coating process and coating, and can solve problems such as failure to meet repair requirements and cladding layer cracking

Inactive Publication Date: 2017-02-15
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ni-based powder has good corrosion resistance and wear resistance, and is widely used as cladding layer material. At present, the commonly used Ni-based self-fluxing powder mainly includes Ni-Cr-B-Si alloy, but the preparation of high-hardness Ni-based powder The cracking phenomenon of the cladding layer is serious, and it cannot meet the repair requirements of high surface hardness objects such as gears. In order to make the Ni-based powder practically industrialized, it is urgent to use a new type of laser cladding dedicated for low crack sensitivity and high hardness. breakthrough in powder design

Method used

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  • Special low-crack-sensitivity and high-performance Ni-based composite powder for laser cladding
  • Special low-crack-sensitivity and high-performance Ni-based composite powder for laser cladding
  • Special low-crack-sensitivity and high-performance Ni-based composite powder for laser cladding

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Experimental program
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Effect test

Embodiment 1

[0037] In the following, the powder materials of the present invention are selected for comparison with the powders of the present invention, in order to specifically illustrate the low-crack-sensitivity high-performance Ni-based composite powders specially used for laser cladding.

[0038] A low-crack-sensitivity high-performance Ni-based composite powder for laser cladding in this embodiment, the raw materials and mass percentages used are as follows: Co 8.4%, Fe 10.5%, Cr 11.2%, Si 2.8%, WC 30.0%, Ni 37.1 %.

[0039] The method of using the above raw material components to produce low-crack-sensitivity high-performance Ni-based composite powder for laser cladding is as follows: add the mixed powder into the material cylinder of the XQM-1L planetary ball mill, and weigh the volume of the powder not more than the material cylinder of the ball mill used. 1 / 3 of the volume of the ball mill, and then put 8 stainless steel balls for stirring, set the mixing time for 50 minutes, a...

Embodiment 2

[0047] A Ni-based composite powder with low crack sensitivity and high hardness for laser cladding. The raw materials and mass percentages used are as follows: 10.0% Co powder, 12.0% Fe powder, 13.0% Cr powder, 2.0% Si powder, 30.0% WC powder, and the remaining Measure Ni powder. The preparation method is the same as in Example 1.

[0048] When preparing the cladding layer, the process parameters used are: fiber laser cladding (laser wavelength 950-1100nm), laser power 1000W, scanning speed 5mm / s. The macroscopic appearance of the prepared cladding layer is uniform, continuous, flat, without cracks, and the hardness is higher than 562HV 0.2 , The contact angle is between 120° and 150°.

Embodiment 3

[0050] A Ni-based composite powder with low crack sensitivity and high hardness for laser cladding, the raw materials and mass percentages used are as follows: 8.0% Co powder, 8.5% Fe powder, 10.0% Cr powder, 3.5% Si powder, 28.0% WC powder, and the remaining Measure Ni powder. The preparation method is the same as in Example 1.

[0051] When preparing the cladding layer, the process parameters used are: fiber laser cladding (laser wavelength 950-1100nm), laser power 1100W, and scanning speed 7mm / s. The macroscopic appearance of the prepared cladding layer is uniform, continuous, flat, without cracks, and the hardness is higher than 562HV 0.2 , The contact angle is between 120° and 150°.

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Abstract

The invention provides special low-crack-sensitivity and high-performance Ni-based composite powder for laser cladding. The powder is prepared from raw materials in percentage by mass as follows: 8.0%-10.0% of Co powder, 8.5%-12.0% of Fe powder, 10.0%-13.0% of Cr powder, 2.0%-3.5% of Si powder, 28.0%-30.0% of WC powder and the balance of Ni powder. According to the special low-crack-sensitivity and high-performance Ni-based composite powder for laser cladding, by the aid of the solution strengthening mechanism, the fine grain strengthening mechanism and other mechanisms which are formed under mutual effects of Cr, Fe, Co, Ni and WC, a cladding layer has the high hardness and the high toughness and has the relatively low crack sensitivity; the cladding layer prepared from the powder has the high surface hardness, the high corrosion resistance and the high-temperature resistance; and the powder is prepared with a mechanical mixing method, the production technology is simple, and the price advantage is obvious.

Description

technical field [0001] The invention belongs to the field of surface strengthening, rapid manufacturing and remanufacturing engineering, and specifically relates to a composite powder material mainly designed for laser cladding process optimization with Ni as the main body. The cladding layer made of this material has low crack sensitivity and excellent surface High hardness performance. Background technique [0002] In the remanufacturing process of mechanical parts, the laser cladding process is commonly used to restore the surface or three-dimensional size of the missing part of the part. The material for restoring the missing part of the part is the laser cladding powder material. At present, the practically applied laser cladding powder is the coating material used in the thermal spraying process, which can achieve the purpose of repairing parts to a certain extent, but the powder composition is designed for the technical characteristics of thermal spraying. The claddi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F1/00
CPCB22F1/0003C23C24/103
Inventor 杨勇李昊真王玉玲
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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