Superplastic Forming Method of tc11 Titanium Alloy Complicated Cross Section Annular Parts

A technology of TC11 and titanium alloy, which is applied in the field of superplastic forming of TC11 titanium alloy ring parts with complex cross-section, can solve the problems of superplastic forming that have not been reported yet, and achieve the effect of reducing flow stress and increasing elongation

Active Publication Date: 2016-08-24
GUIZHOU ANDA AVIATION FORGING
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  • Abstract
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Problems solved by technology

At present, the research on the superplasticity of TC11 titanium alloy is limited to the tensile test of the material; and in the field of ring rolling, there has been no report on the superplastic forming of TC11 titanium alloy ring parts with complex cross-sections.

Method used

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  • Superplastic Forming Method of tc11 Titanium Alloy Complicated Cross Section Annular Parts
  • Superplastic Forming Method of tc11 Titanium Alloy Complicated Cross Section Annular Parts
  • Superplastic Forming Method of tc11 Titanium Alloy Complicated Cross Section Annular Parts

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specific Embodiment approach

[0023] To implement the superplastic forming method of the TC11 titanium alloy complex cross-section annular part of the present invention, it is necessary to provide high-temperature heating furnace, press, manipulator, ring rolling mill and other equipment. The diameter of the main roll of the ring rolling mill is Φ860mm. The specific implementation is as follows:

[0024] The main chemical element content (percentage by weight) of TC11 titanium alloy is: Al content 5.80% ~ 7.00%, Mo content 2.80% ~ 3.80%, Zr content 0.80% ~ 2.00%, Si content 0.20% ~ 0.35%, content Fe content ≤ 0.25%, C content ≤ 0.10%, N content ≤ 0.05%, H content ≤ 0.012%, O content ≤ 0.15%, and the balance being Ti.

[0025] The superplastic forming process steps of TC11 titanium alloy ring parts with complex cross-section are as follows:

[0026] Cut the TC11 titanium alloy into rods according to a certain specification; heat the TC11 titanium alloy rods to 1030-1050°C, and after reaching the temperatur...

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Abstract

The invention discloses a method for superplastic forming of a TC11 titanium alloy ring with complex cross-section. The steps are as follows: heating the TC11 titanium alloy to 1030-1050°C, elongating in one direction, with a total deformation of 20%-40%, and air cooling ; Reheat to 950-980°C, repeatedly upsetting and elongating, the total deformation is 40%-65%, air cooling; then keep at 950°C for 1.5 hours, air-cooling; keep at 530°C for 6 hours, air-cooling; get fine crystal TC11 titanium alloy blank; reheated to forging temperature, through upsetting, punching, and flat height, to obtain the alloy ring blank; at a temperature of 880-900°C, rolling at a maximum feed speed of 2.0mm / s Forming to obtain TC11 titanium alloy complex section ring. The method enables the TC11 titanium alloy to be in a superplastic state during the forming process, thereby obtaining a TC11 titanium alloy complex cross-section annular part that meets requirements in performance and size. The ring is mainly used as a connecting ring, a bearing ring, etc., and is widely used in mechanical equipment in aviation, aerospace and other industrial fields.

Description

technical field [0001] The invention relates to a superplastic forming method, in particular to a superplastic forming method of a TC11 titanium alloy complex cross-section annular piece. Background technique [0002] Ring parts with complex cross-sections are widely used as connections, slewing support rings, bearing rings, etc. in large-scale mechanical equipment in aviation, aerospace, construction machinery, wind power, petrochemical and other industrial fields. This kind of ring has harsh service conditions, high requirements on its performance, and the structure of the ring is complex. It is difficult to meet the performance and size requirements of the ring at the same time by using the traditional forming method. [0003] Superplastic forming technology has been widely used in aviation, aerospace and other fields due to its advantages of low deformation resistance, high material plasticity, and the ability to precisely form complex parts at one time. At present, the...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18
Inventor 谢永富王斌蒲思洪刘成刘彦成奚晓潘俊杰杨亚平
Owner GUIZHOU ANDA AVIATION FORGING
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