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Manufacturing method of low-stress TC4 titanium alloy ring piece

A manufacturing method, titanium alloy technology, applied in the manufacturing field of ring parts, can solve the problems of destroying the integrity of forgings, unable to completely remove residual stress, etc., and achieve the effects of reducing residual stress level, dimensional stability, and improving stress distribution

Inactive Publication Date: 2017-04-26
GUIZHOU ANDA AVIATION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first method cannot completely remove the residual stress, generally only 30% to 60% of the residual stress can be removed; the second method often destroys the integrity of the forging

Method used

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0013] The main chemical element content (percentage by weight) of the TC4 titanium alloy is: 5.5% to 6.8% of Al, 3.5% to 4.5% of V, 0.30% of Fe, 0.10% of C, and 0.05% of N. %, H content is 0.015%, O content is 0.20%, and the balance is Ti.

[0014] The steps of this method are as follows:

[0015] Cut the TC4 titanium alloy into rods according to certain specifications; ignite the electric furnace and heat it to 30°C to 50°C above the phase transition point. After reaching the temperature, put the TC4 titanium alloy rods into the electric furnace to heat and keep warm Calculated at 1.5min / mm; take the bar out of the electric furnace, transfer it to a press for upsetting and punching to make an intermediate billet, and the transfer time is ≤50s; return the intermediate billet to the furnace while it is hot and heat it to 30°C above the phase transition point To 50 ℃, the holding time is 1.5min / mm;

[0016] The intermediate billet is taken out for rolling, the first pre-rolli...

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PUM

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Abstract

The invention discloses a manufacturing method of a low-stress TC4 titanium alloy ring piece. The manufacturing method comprises the following steps: a TC4 titanium alloy rod is heated and is subjected to heat preservation, and then is subjected to upsetting, punching, pre-rolling and finished rolling and a ring piece is manufactured, the ring piece is subjected to solid solution treatment, during solid solution cooling, an aqueous medium with the temperature being greater than or equal to 150 degrees is adopted, after the solution treatment, cold bulging is carried out, the bulging amount is 1.8-2.2%, aging treatment is carried out after the bulging, and the low-stress TC4 titanium alloy ring piece is obtained. With the adoption of the manufacturing method, residual stress of the TC4 titanium alloy ring piece can be removed effectively, the forging performance can be improved. The manufacturing method is applied to the manufacturing of the low-stress TC4 titanium alloy ring piece.

Description

technical field [0001] The invention relates to a method for manufacturing a ring, in particular to a method for manufacturing a low-stress TC4 titanium alloy ring. Background technique [0002] TC4 titanium alloy rings are mainly used in important parts such as aero-engine casings. In practical applications, deformation during machining often occurs and the dimensional stability is extremely poor. The important factor causing the deformation of parts due to machining is excessive internal residual stress High, reducing the internal residual stress of the blank ring can effectively relieve the deformation caused by the release of residual stress during the machining process of the part. At present, the residual stress is usually removed or adjusted by the following methods: ①Remove the stress by thermal action, that is, adjust the tissue by heating to relax or remove the residual stress; ②Remove and adjust the residual stress by mechanical action, that is, use the plastic de...

Claims

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Application Information

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IPC IPC(8): B21J5/00B21J5/08B21J5/10B21H1/06
CPCB21J5/002B21H1/06B21J5/08B21J5/10
Inventor 王龙祥占立水李艳英杨国平邹坚
Owner GUIZHOU ANDA AVIATION FORGING
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