Modified material on surface of high-temperature component and preparation method of cladding layer of modified material

A technology for surface modification and high-temperature components, which is applied in the field of surface modification materials and cladding layer preparation of high-temperature components. It can solve the problems of complex equipment, large residual stress, and difficulty in controlling component ratios, and achieve molten pool heating and cooling. Fast speed, excellent high temperature oxidation resistance, uniform and stable structure

Inactive Publication Date: 2017-04-26
KUNMING UNIV OF SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The disadvantages of physical vapor deposition (PVD) are: it is difficult to control the component ratio due to thermal decomposition when evaporating compounds; it is difficult to form a film with low vapor pressure substances; sputtering targets are required, the target materials need to be refined, and the target utilization rate is low
[0005] The defects of chemical vapor deposition (CVD) are: weak film-base bonding force, non-wear-resistant and directional coating film; difficult to remove impurities; difficult to control the composition; Explosive or toxic, requiring protective measures; difficult to locally coat substrates
[0006] The defects of surfacing welding are: large heat input; large residual stress; large dilution rate of substrate to coating; complicated subsequent processing procedures
[0007] The defects of thermal spraying are: the bonding strength between the sprayed coating and the substrate is low, and it cannot withstand alternating loads and impact loads; the substrate surface preparation requirements are high; the process is affected by various conditions, and there is no effective detection method for the coating quality
[0008] The defects of electron beam surface cladding include: the air strongly scatters and absorbs the electron beam, and the mean free path is very short; the electron beam surface cladding must be carried out under vacuum conditions, and the size of the workpiece is limited; the electron beam surface cladding equipment is complicated, high cost
[0009] The disadvantages of ion implantation are: high-energy ion implantation changes the lattice structure; the equipment is complex and expensive, and it is mainly used for key components at present; the ion implantation layer is thin, which limits its application range; it cannot be used to treat complex inner cavity surfaces. Parts; surface strengthening by ion implantation is processed in a vacuum chamber, and the size of the part is limited by the size of the vacuum chamber

Method used

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  • Modified material on surface of high-temperature component and preparation method of cladding layer of modified material
  • Modified material on surface of high-temperature component and preparation method of cladding layer of modified material
  • Modified material on surface of high-temperature component and preparation method of cladding layer of modified material

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Effect test

Embodiment 1

[0037] The surface modification material of high-temperature parts in this embodiment is composed of five element powders of Ti, Al, Hf, Ta and W; the components and molar percentages are 35% of Ti powder, 35% of Al powder, 15% of Hf powder, and 8% of Ta powder. %, W powder 7%, the average particle size of Ti powder, Al powder, Hf powder, Ta powder and W powder is 75 μm; and the mass of various element powders is weighed with an analytical electronic scale, and the total mass of the mixed powder is 50 g.

[0038] The preparation method of the cladding layer of the surface modification material of the high temperature component described in this embodiment comprises the following steps:

[0039] (1) Use TC4 (Ti-6Al-4V) as the base material, use mechanical grinding to remove oxides, use acetone to remove oil stains, and use ultrasonic alcohol to clean, dry and set aside;

[0040] (2) After weighing each component in proportion, carry out vacuum ball milling to make them fully mi...

Embodiment 2

[0045] Example 2: The material for surface modification of high-temperature components in this example is composed of five element powders of Ti, Al, Hf, Ta, and W; the components and their molar percentages are Ti powder 40%, Al powder 35%, and Hf powder 15% , Ta powder 5%, W powder 5%, the average particle diameter of Ti powder, Al powder, Hf powder, Ta powder and W powder is 80 μm; The mass is 50g.

[0046] The preparation method of the cladding layer of the surface modification material of the high-temperature parts in this embodiment includes the following steps:

[0047] (1) Use TC4 (Ti-6Al-4V) as the base material, use mechanical grinding to remove oxides, use acetone to remove oil stains, and use ultrasonic alcohol to clean, dry and set aside;

[0048] (2) After weighing each component in proportion, carry out vacuum ball milling to make them fully mixed evenly, ball milling parameters: ball milling speed is 55r / min, ball to material ratio is 18:1, ball milling time i...

Embodiment 3

[0053] Example 3: The surface modification material of high-temperature parts in this example is composed of five element powders of Ti, Al, Hf, Ta and W; the components and mole percentages are 40% of Ti powder, 40% of Al powder, and 8% of Hf powder , Ta powder 6%, W powder 6%, the average particle diameter of Ti powder, Al powder, Hf powder, Ta powder and W powder is 85 μ m; The mass is 50g.

[0054] The preparation method of the cladding layer of the surface modification material of the high temperature component described in this embodiment comprises the following steps:

[0055] (1) Use TC4 (Ti-6Al-4V) as the base material, use mechanical grinding to remove oxides, use acetone to remove oil stains, and use ultrasonic alcohol to clean, dry and set aside;

[0056] (2) After weighing each component in proportion, carry out vacuum ball milling to make them fully mixed evenly, ball milling parameters: ball milling speed is 50r / min, ball to material ratio is 17:1, ball milling...

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Abstract

The invention discloses a modified material on the surface of a high-temperature component and a preparation method of a cladding layer of the modified material. The modified material is composed of, by mole percent, 35-40% of Ti powder, 35-40% of Al powder, 6-15% of Hf powder, 4-8% of Ta powder and 3-7% of W powder. After the modified material on the surface of the high-temperature component is subjected to laser cladding, the cladding layer is good in surface macro appearance and has the characteristics of being small in structural grain, free of cracks, and high in bonding strength with a base material. The cladding layer has excellent performance under high-temperature conditions, the operating temperature of the high-temperature component can be greatly increased, working demands under high temperatures are met, and the cladding layer has extremely high academic value and extremely great industrial application potentiality.

Description

technical field [0001] The invention belongs to the field of laser surface modification, and in particular relates to a surface modification material for a high-temperature component and a preparation method for a cladding layer thereof. Background technique [0002] As a new type of light metal material, titanium alloy has the advantages of low density, high specific strength, good biocompatibility, and corrosion resistance. It is widely used in aerospace, marine engineering, petrochemical, medical and health, and machinery manufacturing. However, Its low high temperature oxidation resistance severely limits its wide application. The service temperature of titanium alloy is generally lower than 650°C. As the working temperature increases, especially when the temperature exceeds 650°C, the titanium alloy will undergo faster oxidation reaction in the air environment, which will significantly damage the performance. The high-temperature oxidation resistance of alloys has beco...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C30/00
CPCC22C30/00C23C24/106
Inventor 刘洪喜董涛穆永坤刘子峰
Owner KUNMING UNIV OF SCI & TECH
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