CN-122013186-A - Electric arc spraying/argon arc cladding high-temperature-resistant alloy coating and preparation method thereof

Abstract

The invention relates to the technical field of composite coatings, in particular to an electric arc spraying/argon arc cladding high-temperature resistant alloy coating and a preparation method thereof. The invention adopts the arc spraying technology to spray the WC88-Co12 priming layer on the surface of the titanium alloy matrix, improves the bonding force between Ti-Al-xNb-Y and the titanium alloy matrix, enhances the high-temperature oxidation resistance of the coating, adopts the argon arc cladding technology to clad Ti, al, nb, Y metal powder on the surface of the priming layer, prepares the Ti-Al-xNb-Y coating, and improves the high-temperature oxidation resistance of the titanium alloy surface. According to the invention, by controlling the process conditions, the composite coating is defect-free, the coating and the matrix show good metallurgical bonding, and the unit oxidation weight gain of the prepared WC88-Co12/Ti-Al-10Nb-Y coating is 22.73mg/cm 2 which is only 0.63 times of the unit oxidation weight gain of the matrix in a constant-temperature oxidation test at 800 ℃/100 h.

Inventors

• WANG YONGDONG
• Chang Mengyang
• WANG JINYU

Assignees

• 黑龙江科技大学

Dates

Publication Date

20260512

Application Date

20260304

Claims (10)

1. 1. The preparation method of the arc spraying/argon arc cladding high-temperature resistant alloy coating is characterized by comprising the following steps of: performing electric arc spraying on the surface of a titanium alloy substrate to form a WC-Co coating, wherein a welding wire used for the electric arc spraying takes WC88-Co12 powder as a flux core, and the electric arc spraying conditions comprise spraying voltage of 25V, current of 50A, wire feeding speed of 25.54mm/s or spraying voltage of 37V, current of 50-110A and wire feeding speed of 25.54-55.67mm/s; Coating cladding powder on the surface of the WC-Co coating, and then carrying out argon arc cladding to form a Ti-Al-xNb-Y coating to obtain the electric arc spraying/argon arc cladding high-temperature resistant alloy coating, wherein x=0-15, and x is the mass fraction; The cladding powder is mixed powder of Ti, al, nb and Y, and comprises 0.8% of Y, 60% of Al, 0-15% of Nb and the balance of Ti in percentage by mass: the argon arc cladding conditions comprise cladding current of 110-120A, air flow of 10-15L/min, welding speed of 150-230mm/min, and when the cladding current is 120A, the welding speed is 150mm/min.
2. 2. The production method according to claim 1, wherein the cladding powder comprises Y0.8%, al 60%, nb 10% and the balance of Ti in mass%.
3. 3. The method according to claim 1, wherein the arc spraying has a spraying distance of 80 to 120mm.
4. 4. The method of manufacturing of claim 1, wherein the wire has a diameter of 1.0mm.
5. 5. The method of claim 1 or 3, wherein the outer skin of the welding wire is stainless steel.
6. 6. The method of claim 1, wherein the arc spraying has a thickness of 200-350 μm.
7. 7. The method of manufacturing according to claim 1 or 2, characterized in that the coating thickness of the cladding powder is 1-1.5mm.
8. 8. The method of claim 1, further comprising grit blasting the titanium alloy substrate prior to the arc spraying.
9. 9. The method of claim 1, wherein the coating is preceded by blending the cladding powder with water glass.
10. 10. The arc spraying/argon arc cladding high temperature resistant alloy coating prepared by the preparation method of any one of claims 1 to 9 is characterized by comprising a WC-Co coating and a Ti-Al-xNb-Y coating which are combined on the surface of a titanium alloy substrate and are distributed in a lamination manner, wherein x=0 to 15, and x is the mass fraction.

Description

Electric arc spraying/argon arc cladding high-temperature-resistant alloy coating and preparation method thereof Technical Field The invention relates to the technical field of composite coatings, in particular to an electric arc spraying/argon arc cladding high-temperature resistant alloy coating and a preparation method thereof. Background Along with the continuous development of the industrial technology level in China, the development of novel structural materials and surface protective coating technologies with high comprehensive performance, low resource consumption and strong competitive advantage has become the main stream direction of the industrial technology development in various countries. Titanium and titanium alloy have high specific strength, excellent corrosion resistance, good toughness and other excellent properties, and the excellent mechanical properties lead the titanium and titanium alloy to be widely applied to the industrial departments of aerospace, chemical industry, biomedicine and the like. Compared with the nickel-based superalloy used in the aerospace industry at present, the titanium alloy has low density. If the high-temperature titanium alloy can be developed to meet the performance requirements of engine parts under the high-temperature working condition, the engine thrust is obviously improved, and the application of the titanium alloy in the aerospace field is further expanded. The titanium alloy has excellent mechanical properties, but the titanium alloy has weak fatigue resistance and easily oxidized high-temperature performance, and is subject to adhesive wear when contacted with metal, so that the service life and safety of a titanium alloy structural member are affected. Particularly in practical industrial application, the titanium alloy structural component can generate high temperature in the process of running friction, so that the surface of the titanium alloy structural component is rapidly oxidized, the performance of the titanium alloy is affected, and the service life of a titanium alloy workpiece is shortened. Therefore, the improvement of the high-temperature oxidation resistance of the titanium alloy is an important problem for improving the application range of the titanium alloy. Disclosure of Invention In view of the above, the invention aims to provide an electric arc spraying/argon arc cladding high-temperature resistant alloy coating and a preparation method thereof. According to the invention, the high-temperature oxidation resistance of the titanium alloy surface is greatly improved by preparing the high-temperature alloy coating on the titanium alloy substrate surface. In order to achieve the above object, the present invention provides the following technical solutions: The invention provides a preparation method of an electric arc spraying/argon arc cladding high-temperature resistant alloy coating, which comprises the following steps: performing electric arc spraying on the surface of a titanium alloy substrate to form a WC-Co coating, wherein a welding wire used for the electric arc spraying takes WC88-Co12 powder as a flux core, and the electric arc spraying conditions comprise spraying voltage of 25V, current of 50A, wire feeding speed of 25.54mm/s or spraying voltage of 37V, current of 50-110A and wire feeding speed of 25.54-55.67mm/s; Coating cladding powder on the surface of the WC-Co coating, and then carrying out argon arc cladding to form a Ti-Al-xNb-Y coating to obtain the electric arc spraying/argon arc cladding high-temperature resistant alloy coating, wherein x=0-15, and x is the mass fraction; The cladding powder is mixed powder of Ti, al, nb and Y, and comprises 0.8% of Y, 60% of Al, 0-15% of Nb and the balance of Ti in percentage by mass: the argon arc cladding conditions comprise cladding current of 110-120A, air flow of 10-15L/min, welding speed of 150-230mm/min, and when the cladding current is 120A, the welding speed is 150mm/min. Preferably, the cladding powder comprises, in mass percent, Y0.8%, al 60%, nb 10% and the balance Ti. Preferably, the spraying distance of the electric arc spraying is 80-120mm. Preferably, the diameter of the welding wire is 1.0mm. Preferably, the outer skin of the welding wire is stainless steel. Preferably, the thickness of the arc spraying is 200-350 μm. Preferably, the coating thickness of the cladding powder is 1-1.5mm. Preferably, before the arc spraying, the method further comprises the step of carrying out sand blasting on the titanium alloy substrate. Preferably, the cladding powder is blended with water glass prior to the coating. The invention provides the arc spraying/argon arc cladding high-temperature resistant alloy coating prepared by the preparation method, which comprises a WC-Co coating and a Ti-Al-xNb-Y coating which are combined on the surface of a titanium alloy substrate and are distributed in a laminated manner, wherein x=0-15, and x is the mass fraction. Compared with th