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Open blank forging method of near β titanium alloy ti-7333

A ti-7333, beta titanium alloy technology, applied in the field of titanium alloy forging, can solve the problems of coarse structure and uneven quality of forging billet, and achieve the effect of uniform structure, high flaw detection level and fine grain size.

Active Publication Date: 2015-12-30
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the shortcomings of poor quality such as coarse and uneven forging blanks in the prior art, the present invention proposes a blank forging method for near-β titanium alloy Ti-7333

Method used

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  • Open blank forging method of near β titanium alloy ti-7333
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  • Open blank forging method of near β titanium alloy ti-7333

Examples

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Embodiment 1

[0034] This embodiment is a billet forging method of near-β titanium alloy Ti-7333. The press machine used is a 1600T fast forging machine, and the hammer head of the forging hammer of the press machine has a flat surface and rounded edges. The specification of the Ti-7333 alloy billet is Φ265mm×330mm, and the phase transition temperature T of the billet is measured β is 850°C.

[0035] The specific implementation steps of this embodiment are as follows:

[0036] Step 1. Determine the height-to-diameter ratio of the billet and check the appearance; measure and calculate the ratio of the height to the diameter of the Ti-7333 alloy billet with a caliper, and the calculated height-to-diameter ratio is about 1.25, which meets the requirement that the height-to-diameter ratio is ≤ 2.0; inspect the billet , no sharp corners, chamfering the end of the billet 10×10mm; grinding and removing the surface defects of the billet, the ratio of the width of the billet surface defect cleanin...

Embodiment 2

[0053] This embodiment is a billet forging method of near-β titanium alloy Ti-7333. The press machine used is a 1600T fast forging machine, and the hammer head of the forging hammer of the press machine has a flat surface and rounded edges. The specification of the Ti-7333 alloy billet is Φ340mm×480mm, and the phase transition temperature T of the billet is measured β is 850°C. The specific implementation steps are as follows:

[0054] Step 1. Determine the height-to-diameter ratio of the billet and check the appearance; measure and calculate the ratio of height to diameter of the Ti-7333 alloy billet with a caliper, and the calculated height-to-diameter ratio is about 1.41, which meets the requirement that the height-to-diameter ratio is ≤ 2.0; check the billet billet , no sharp corners, chamfering the end of the billet 10×10mm; grinding and removing the surface defects of the billet, the ratio of the width of the billet surface defect cleaning to the grinding depth of the ...

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Abstract

A cogging forging method for close beta Ti alloy Ti-7333 comprises the steps of placing a heated blank on a forging machine and forging with a normal two-rammering two-drawing mode; after the two-rammering two-drawing mode is finished, drawing the blank to eight directions by adopting a normal method, wherein the time for each rammering of the forging machine is 5s, and the total deformation quantity of the first heating number forging is greater than or equal to 40%; air-cooling the blank to the room temperature after the first heating number forging is finished; in the added heating numbers, finishing the forging of rest heating numbers by adopting the method the same as that in the secondary forging. As the technical route of the high-low-high-low forging temperature is adopted in the method, the obtained Ti-7333 alloy is uniform in texture, fine in crystal grain without obvious forging defects, higher in flaw detection level and excellent in mechanical properties, and provides well basis for the subsequent die forging and thermal treatment procedure, the forging heating numbers are reduced as the method adopts the technical route, and the energy and cost are effectively saved.

Description

technical field [0001] The invention belongs to the field of titanium alloy forging, and relates to a blank forging method of a novel near-β titanium alloy Ti-7333, which is suitable for the production and manufacture of titanium alloy forging blanks. Background technique [0002] Forging is a processing method that uses a forging machine to apply pressure to a metal blank according to an appropriate process to cause plastic deformation and improve its internal structure to obtain a forging with certain mechanical properties, a certain shape and size. Forging (forging and stamping) One of two components. Forging can eliminate defects such as as-cast porosity produced in the metal smelting process and optimize the microstructure. At the same time, due to the preservation of complete metal flow lines, the mechanical properties of forgings are generally better than castings of the same material. [0003] Near-β titanium alloys have become research hotspots all over the world i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00
Inventor 寇宏超李金山樊江昆赖敏杰唐斌薛祥义
Owner NORTHWESTERN POLYTECHNICAL UNIV
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