Vacuum brazing method of high-temperature alloy and cobalt-based powder metallurgy material

A technology of powder metallurgy and superalloy, applied in welding equipment, metal processing equipment, welding/welding/cutting items, etc., can solve the problems of complex shape and high dimensional accuracy of precision valves, achieve good weld uniformity and ensure coaxiality The effect of degree dimensional accuracy

Inactive Publication Date: 2018-05-15
GUIZHOU HONGLIN MACHINERY
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Problems solved by technology

However, the precision valves in the fuel pump regulators of aero-engines have complex shapes and high dimensional accuracy. These surface strengthening and modification processes cannot be used in the manufacture of precision valve components.

Method used

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  • Vacuum brazing method of high-temperature alloy and cobalt-based powder metallurgy material
  • Vacuum brazing method of high-temperature alloy and cobalt-based powder metallurgy material
  • Vacuum brazing method of high-temperature alloy and cobalt-based powder metallurgy material

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with embodiment, but not as any limitation to the present invention.

[0023] The invention is used for the manufacture of long-life and high-speed precision valves. In view of the high hardness of the cobalt-based powder metallurgy material, which is difficult to process into a complex valve structure, the present invention uses a vacuum brazing method to weld the cobalt-based powder metallurgy material on the valve shaft 1 to provide excellent friction performance and meet the working requirements of the high-speed valve .

[0024] The design of the valve structure: the valve is composed of two parts, such as figure 2 and image 3 shown. Valve shaft 1 is processed by high-temperature alloy material, sleeve 1 2, sleeve 2 3, sleeve 3 4, sleeve 4 5 and sleeve 5 6 are processed by cobalt-based powder metallurgy materials, and the two are connected together by vacuum high-temperature brazing process. ...

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Abstract

The invention discloses a vacuum brazing method of a high-temperature alloy and cobalt-based powder metallurgy material, which includes confirmation of a brazing gap; combined layout method of a gold-based brazing filler and a brazing technique. The invention realizes the preparation of a cobalt-based powder metallurgy wear-resisting material layer with excellent friction performance at the surface of a precise spare part. According to the precise spare part processed by the brazing technique, the brazing filler fills the weld joint completely, and the weld joint is good in uniformity; the coaxial dimension precision of the welding spare part is guaranteed, and the shear intensity of the weld joint is over 280 MPa.

Description

technical field [0001] The invention relates to a method for vacuum brazing of high-temperature alloys and cobalt-based powder metallurgy materials, and also relates to the occasion of vacuum brazing of other powder metallurgy materials. Background technique [0002] The high-speed valve assembly of the engine is one of the key components in this product. This component has a high speed (over 6000 rpm) and a long life. During the working process, the valve is subjected to the action of eccentric force and will be close to one side of the bush for sliding frictional movement, and the linear speed is high, which will generate friction heat. In addition, the gap between the valve and the valve is small, even if the cleanliness of the fuel meets the requirements, the close contact between the friction surfaces The lubricating oil film in the area will also be destroyed due to the effect of eccentric force, which is prone to adhesive wear failure. [0003] According to many year...

Claims

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Application Information

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IPC IPC(8): B23K1/008B23K33/00B23K103/18
CPCB23K1/0008B23K1/008B23K33/004
Inventor 唐华郑伟蔡桂珍
Owner GUIZHOU HONGLIN MACHINERY
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