Method for producing an article by superplastic shaping and diffusion welding

A diffusion welding, superplastic technology, applied in welding/welding/cutting items, manufacturing tools, welding equipment, etc., can solve the problem of not providing

Inactive Publication Date: 2008-04-23
INST SVERKHPLASTICHNOSTI METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for producing an article by superplastic shaping and diffusion welding
  • Method for producing an article by superplastic shaping and diffusion welding
  • Method for producing an article by superplastic shaping and diffusion welding

Examples

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Embodiment Construction

[0068] A hollow fan blade prototype consisting of a cover and inclined stiffeners forming a core is manufactured by the method.

[0069] The product is made of titanium alloy Ti-6Al-4V. The alloy is most commonly used to manufacture articles by diffusion welding and superplastic forming. However, articles can also be made of other alloys. In particular, the cover can be made of a harder titanium alloy, or even titanium intermetallic compound. An example of manufacturing a simpler article from two blank workpieces will not be described. In other words, the following examples do not include all articles that can be produced by the present invention.

[0070] The values ​​for temperature, pressure and deformation speed known in particular from [2,3] are used for the individual method steps, eg diffusion welding, twisting, superplastic forming.

[0071] Example 1. Taking into account the process area, three 240 x 160 mm workpieces (two for the cap and one for the core) were c...

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Abstract

The invention relates to metal forming, more specifically, to methods for producing titanium alloy articles by superplastic shaping and diffusion welding. The inventive method is particularly suitable for aviation engine building for producing a fan blade-type part. The inventive method for producing an article by superplastic shaping and diffusion welding from at least two titanium alloy blanks consists in designating connectable and not-connectable sections on the surface of at least one blank, in assembling the blanks into a packet, in heating said packet to a specified temperature (T), in exposing it to a specified pressure (p) in such a way that the blanks are connected to each other by diffusion welding and a semi-finished product is obtained, in heating and supplying a pressurised working medium into the semi-finished product internal cavity for superplastically shaping at least one blank in such a way that a desirably shaped article is produced. Said method differs from known methods in that the diffusion welding is carried out through titanium alloy plates whose flow stress is less than the blank flow stress, mainly, when the article is made from at least three blanks and a connection preventing material is applied to the non-connectable sections of at least one part of at least one blank surface.

Description

technical field [0001] The metal forming of the invention specifically relates to a method for manufacturing titanium alloy products through superplastic forming and diffusion welding. The method is particularly applicable to aircraft engine construction to manufacture articles such as fan blades. [0002] The present method is an alternative to the method [1] for manufacturing fan blades from two blanks which are shaped to have predetermined contours and dimensions and then joined together by diffusion welding. The present method of fabricating fan blades using superplastic forming and diffusion welding provides more scalable process capabilities than prior art methods, allowing for minimal article weight and formation of virtually any geometry ribs. Typically three workpieces are used, two of which form the closure and a third which forms the core in the shape of an angled stiffener. Background technique [0003] A method [2] for manufacturing an article from two or mor...

Claims

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Application Information

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IPC IPC(8): B21D26/02B21D53/78B21D26/055
CPCB23K2203/14B23K2201/18B21D26/055B21D53/78B23K20/023B23P15/04B23K2101/18B23K2103/14
Inventor O·A·凯比舍夫A·A·克鲁格洛夫R·Y·卢特福林
Owner INST SVERKHPLASTICHNOSTI METAL
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