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Cobalt-based powder used for plasma arc surfacing and capable of resisting high-temperature corrosion and wear

A high-temperature corrosion-resistant, plasma arc technology, used in surface engineering and metallurgy fields, can solve the problems of reduced durability of coatings, insufficient wear resistance, insufficient wear resistance and corrosion resistance, etc., to achieve excellent anti-oxidation, Improve the efficiency of use and the effect of low equipment requirements

Active Publication Date: 2017-06-13
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that Co-25Cr-10Ni-4Al-5Ta-0.5Y has good high temperature corrosion resistance, but its microhardness is only 650-700HV at its best 0.5 , insufficient wear resistance
The lack of wear resistance and corrosion resistance of the surfacing layer reduces the durability of the coating, which limits the use of the powder to a certain extent

Method used

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  • Cobalt-based powder used for plasma arc surfacing and capable of resisting high-temperature corrosion and wear
  • Cobalt-based powder used for plasma arc surfacing and capable of resisting high-temperature corrosion and wear
  • Cobalt-based powder used for plasma arc surfacing and capable of resisting high-temperature corrosion and wear

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Experimental program
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Effect test

Embodiment 1

[0028] Step One, Ingredients

[0029] Use the balance that accuracy is 0.01g to carry out batching 1000g to each component by the weight percent of each component of Table 1 Example 1, and weigh 5g of stearic acid by 0.5wt% of the total weight.

[0030] Step Two: Spherical Ink

[0031] According to the ball-milling ratio of 1:10, weigh the weight of the required grinding balls. It should be noted that the grinding balls require mixing balls of different diameters. Fatty acid is used as a process control agent to prevent the powder from sticking during the ball milling process, and then the sealed ball milling tank is charged and deflated 6 times with Ar gas to ensure the Ar environment in the ball milling tank and avoid the oxidation of the alloy components during the ball milling process , set the rotation speed of the planetary ball mill to 150r / min and the time to 10h. After the nodular ink is finished, put the ball mill jar into the refrigerator to cool the ball mill jar ...

Embodiment 2

[0035] The target composition is Example 2 in Table 1. The ingredients and powder output are as shown in Example 1. The difference is: in the ball ink, the set speed is 150r / min, and the ball milling time is 15h to obtain cobalt-based powder.

Embodiment 3

[0037] The target composition is Example 3 in Table 1. The ingredients and powder output are as shown in Example 1. The difference is: in the ball ink, the set speed is 180r / min, and the ball milling time is 12h to obtain cobalt-based powder.

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Abstract

The invention relates to cobalt-based powder used for plasma arc surfacing and capable of resisting high-temperature corrosion and wear. The powder is prepared from components in percentage by mass as follows: 12%-14% of Cr, 20%-24% of Mo, 2.5%-3.2% of Si, 3%-6% of Al, 1%-3% of Ta, 0.3%-0.8% of Y2O3, 0.1%-0.2% of CeO2 and the balance of Co; the particle size of original powder ranges from 200 meshes to 350 meshes. Through reasonable component proportioning of Cr, Mo, Si, Al, Y2O3, CeO2 and other rare earth oxides, high oxidation resistance and sulfuration resistance of a cobalt-base alloy are guaranteed while the strength and the wear resistance are guaranteed.

Description

technical field [0001] The invention belongs to the fields of surface engineering and metallurgy, and relates to a cobalt-based alloy powder for plasma arc surfacing, in particular to a high-temperature corrosion-resistant and wear-resistant coating cobalt-based alloy powder for plasma arc surfacing. Background technique [0002] Under the conditions of high temperature and corrosive media in energy, chemical and thermal power plants, the main form of surface wear and corrosion of parts. At present, surface engineering technologies such as surface modification, surface surfacing and other technologies are used to deposit a coating of several microns to several millimeters on the surface of the substrate, thereby endowing the substrate with excellent heat resistance, corrosion resistance, wear resistance and high temperature oxidation resistance. . The coatings obtained by thermal spraying, submerged arc surfacing, laser cladding and other processes have some quality problem...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K10/02B23K35/40
CPCB23K10/027B23K35/3046B23K35/40
Inventor 薛海涛刘少奎李永艳陈翠欣
Owner HEBEI UNIV OF TECH
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