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Electrodeposition-laser remelting strengthening process of Ni-nanometer TiN composite layer on surface of nickel base superalloy

A nickel-based superalloy and composite electrodeposition technology, applied in coatings, electrolytic coatings, etc., can solve the problems of difficult parameter control, stress deformation, poor surface flatness, etc., and achieve long service life, enhanced friction resistance, and smooth surface Effect

Inactive Publication Date: 2015-09-23
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the single laser cladding (surfacing) process mainly focuses on powder and filamentous materials, and adopts synchronous feeding of powder (silk) or prefabricated coating to feed materials, which has complex process, difficult parameter control, and microscopic defects in the fusion layer ( Cracks, holes, inclusions, removal of partially coated unmelted powder, etc.), deformation caused by stress, difficulty in guaranteeing cladding uniformity, poor surface flatness, etc.

Method used

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  • Electrodeposition-laser remelting strengthening process of Ni-nanometer TiN composite layer on surface of nickel base superalloy
  • Electrodeposition-laser remelting strengthening process of Ni-nanometer TiN composite layer on surface of nickel base superalloy

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Experimental program
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Effect test

Embodiment 1

[0028]Processing requirements: Prepare a Ni-nano TiN strengthening layer on the ring-cone working surface of Ni80A parts (high-power diesel engine valves), the thickness of the strengthening layer is 150 μm, the surface microhardness reaches 1100HV0.5, and the surface roughness value reaches Ra0.8μm.

[0029] The processing method steps are as follows:

[0030] 1) Composite electrodeposition

[0031] (1) Configure the plating solution according to the following formula: nickel sulfamate (350g / L), nickel chloride (50g / L), boric acid (30g / L), nano-TiN (particle size 20-30nm, purity >99.9%) , 8g / L), sodium lauryl sulfate (0.3g / L), the pH value of plating solution=4.2, temperature T=45 ℃. The prepared plating solution was placed in an ultrasonic cleaning tank heated by a water bath at 45°C for mechanical stirring at a stirring rate of 200 rpm for 30 min.

[0032] (2) The anode used in the electrodeposition process is an electrolytic nickel plate (purity>99.9%), the cathode is t...

Embodiment 2

[0039] Processing requirements: Prepare a Ni-nano TiN strengthening layer on the working surface of KGH95 parts (a wear-resistant ring for large displacement corrosion-resistant centrifugal pumps), the thickness of the strengthening layer is 170 μm, the surface microhardness reaches 1000HV0.5, and the surface roughness value reaches Ra0. 4 μm.

[0040] The processing method steps are as follows:

[0041] 1) Composite electrodeposition

[0042] (1) Configure the plating solution according to the following formula: nickel sulfamate (350g / L), nickel chloride (50g / L), boric acid (30g / L), nano-TiN (particle size 20-30nm, purity >99.9%) , 8g / L), sodium lauryl sulfate (0.3g / L), the pH value of plating solution=4.2, temperature T=45 ℃. The prepared plating solution was placed in an ultrasonic cleaning tank heated by a water bath at 45°C for mechanical stirring at a stirring rate of 200 rpm for 30 min.

[0043] (2) The anode used in the electrodeposition process is an electrolytic n...

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Abstract

The invention relates to an electrodeposition-laser remelting strengthening process of a Ni-nanometer TiN composite layer on a surface of a nickel base superalloy. The process comprises the following steps: (1) preparation of plating solution: the plating solution comprises such components as nickel aminosulfonate, nickel chloride and water solution of boric acid; (2) preparation of electrodes: the area ratio of an anode to a cathode is 1.5: 1; and the anode and the cathode are arranged in parallel by a distance of 30 mm; (3) composite electrodeposition: a power supply adopts a two-way high-frequency pulse power supply; and (4) laser remelting: a solid pulse laser processor is adopted to perform the one-way laser remelting; and applied power ultrasonic waves, high-intensity magnetic fields and high-frequency pulse current parameters assist the electrodeposition process. The process organically combines the electrodeposition Ni-nanometer TiN composite layer technology with the laser cladding technology, is a new composite processing technology of physics and electrochemistry, and has the advantages of high processing efficiency and quality and wider application range. The process can satisfy the use requirements of nickel base alloy parts under the working conditions of high speed, high temperature, high impact load and corrosion.

Description

technical field [0001] The invention relates to a non-traditional processing technology, surface strengthening, and surface modification treatment, in particular to a Ni-nano TiN composite layer electrodeposition-laser remelting strengthening process on the surface of a nickel-based superalloy. Background technique [0002] Nickel-based superalloys (KGH95, Ni80A, Ni90A, etc.) are widely used due to their good thermal stability, thermal strength and high-temperature structural stability, and can withstand oxidation, gas corrosion and complex stress at 600-1000 °C Used in national defense, aerospace, automobile, metallurgy, chemical industry, mold manufacturing and other industries. Friction, wear and corrosion under high-speed, heavy-load and high-temperature conditions are one of the main reasons for the failure of nickel-based superalloy parts. All kinds of mechanical equipment in national defense, aerospace, automobile, metallurgy and other industries usually have relativ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/12C25D15/00C25D5/18C25D5/50
Inventor 吴蒙华贾卫平王元刚王邦国吴敬明
Owner DALIAN UNIV
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