Wear-resisting corrosion-resistant composite coating for ship water-jet propeller impeller and preparation method thereof

A technology of water jet propulsion and composite coating, which is applied in the fields of wear-resistant coating and corrosion resistance of metal substrates. Grinding performance, improving comprehensive performance and service life

Active Publication Date: 2014-03-05
中国人民解放军92537部队
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problems of poor cavitation resistance, corrosion resistance and wear resistance of the impeller coating of the existing marine water jet propulsion, the object of the present invention is to provide a wear-resistant and corrosion-resistant composite coating for the impeller of the marine water jet propulsion and its The preparation method is specifically a preparation method of a high wear-resistant / corrosion-resistant TiC in-situ reinforced NiTi intermetallic compound-based composite coating for ship waterjet propeller impellers. The Ni-Ti-C composite powder is prepared by carbonization of the precursor On the basis of this, the plasma beam cladding technology is used to prepare a NiTi intermetallic compound-based composite coating with good phase change pseudoelasticity and excellent cavitation resistance, corrosion resistance and wear resistance, so as to solve the problem of the current stainless steel impeller material of ship water jet propulsion. The status quo of poor cavitation resistance, corrosion resistance and wear resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Use Ti powder with a particle size of 200 mesh and hydroxy Ni powder with a particle size of 200 mesh, place it in an ultrasonic cleaner with acetone as a solvent to remove oil, rinse it with deionized water, filter and dry. Using sucrose as the carbon precursor, put the clean Ti powder and hydroxy Ni powder in a Fritsch P5 high-energy ball mill with absolute ethanol as the ball milling medium for 8 hours, where the mass ratio of sucrose: Ti powder: hydroxy Ni powder 10:45:45. After taking it out, dry it at 40°C for 6h. The dried powder was placed in a KTL1600 II argon-protected vacuum tube furnace, and heat-treated at 250 °C for 3 h to carbonize the precursor. Then, the obtained massive solid was crushed and sieved in an MF-10 fine grinder to obtain a Ni-Ti-C composite powder with a particle size of 200 mesh.

[0034] Using the above-mentioned Ni-Ti-C composite powder as raw material, the TiC in-situ reinforced NiTi intermetallic compound-based composite coating was ...

Embodiment 2

[0038] Use Ti powder with a particle size of 250 mesh and hydroxy Ni powder with a particle size of 250 mesh, place it in an ultrasonic cleaner with acetone as a solvent to remove oil, rinse it with deionized water, filter and dry. Using sucrose as the carbon precursor, put the clean Ti powder and hydroxy Ni powder in a Fritsch P5 high-energy ball mill with absolute ethanol as the ball milling medium for 6 hours, where the mass ratio of sucrose: Ti powder: hydroxy Ni powder It is 15:42.5:42.5. After taking it out, dry it at 50°C for 5h. The dried powder was placed in a KTL1600 II type argon-protected vacuum tube furnace, and heat-treated at 275 °C for 2.5 h to carbonize the precursor. Then, the obtained massive solid was crushed and sieved in an MF-10 fine grinder to obtain a Ni-Ti-C composite powder with a particle size of 250 mesh.

[0039] Using the above-mentioned Ni-Ti-C composite powder as raw material, the TiC in-situ reinforced NiTi intermetallic compound-based compo...

Embodiment 3

[0043] Use Ti powder with a particle size of 150 mesh and hydroxy Ni powder with a particle size of 150 mesh, place it in an ultrasonic cleaner with acetone as a solvent to remove oil, rinse it with deionized water, filter and dry. Using sucrose as the carbon precursor, put the clean Ti powder and hydroxy Ni powder in a Fritsch P5 high-energy ball mill with absolute ethanol as the ball milling medium for 9 h, where the mass ratio of sucrose: Ti powder: hydroxy Ni powder For 20:40:40. After taking it out, dry it at 55°C for 7h. The dried powder was placed in a KTL1600 II argon-protected vacuum tube furnace, and heat-treated at 250 °C for 4 h to carbonize the precursor. Then, the obtained massive solid was crushed and sieved in an MF-10 fine grinder to obtain a Ni-Ti-C composite powder with a particle size of 100 mesh.

[0044] Using the above-mentioned Ni-Ti-C composite powder as raw material, the TiC in-situ reinforced NiTi intermetallic compound-based composite coating was ...

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Abstract

The invention discloses a wear-resisting corrosion-resistant composite coating for a ship water-jet propeller impeller and a preparation method thereof, belonging to the technical field of corrosion-resistant wear-resisting coatings of a metal base body. The coating is obtained by a TiC in-situ reinforced NiTi intermetallic compound-based composite coating through solid-solution and aging treatment. The preparation method of the coating comprises the following steps: (1), preparing Ni-Ti-C composite powder by taking sucrose as a precursor of carbon and taking Ti powder and hydroxyl Ni powder as materials; (2), preparing a TiC in-situ reinforced NiTi intermetallic compound-based composite coating on the surface of a stainless steel impeller of a ship water-jet propeller by taking the Ni-Ti-C composite powder as the material through a plasma-beam cladding technology; and (3), carrying out solid-solution treatment and aging treatment on the coating obtained in the step (2) to obtain the coating. The coating disclosed by the invention can greatly improve cavitation erosion resistance, wearing resistance and corrosion resistance of the stainless steel impeller of the ship water-jet impeller.

Description

technical field [0001] The invention relates to a wear-resistant and corrosion-resistant composite coating for a ship water jet propeller impeller and a preparation method thereof, in particular to a highly wear-resistant / corrosion resistant TiC in-situ reinforced NiTi intermetallic compound base for a ship water jet propeller impeller The invention discloses a method for preparing a composite coating, which belongs to the technical field of corrosion-resistant and wear-resistant coatings for metal substrates. Background technique [0002] The impeller of ship waterjet propulsion will suffer complex and severe corrosion such as pitting corrosion, stress corrosion and multi-phase flow corrosion of seawater, sandstone and cavitation during use. stainless steel or ferritic-austenitic duplex stainless steel. However, due to the low hardness (200-250HV) of austenitic stainless steel, its wear resistance and corrosion resistance in complex environments are poor. Therefore, the u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/04
Inventor 刘斌方志刚王虹斌管勇林科黎理胜刘云生王涛严川伟
Owner 中国人民解放军92537部队
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