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Manufacturing method of large-diameter ultra-long ultra-thin titanium alloy shell

A technology for titanium alloy shells and processing methods, which is applied in the field of preparation and processing of large-diameter, ultra-long, ultra-thin titanium alloy shells, can solve the problems of difficult processing of large-diameter, ultra-long, ultra-thin shells, and achieve good formability and fewer processes , the effect of low energy consumption

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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stress state provided by rolling is suitable for the plastic deformation of the metal cylinder. It can produce seamless tubes of titanium alloys with high strength and poor plasticity. The surface quality and precision of the cylinder obtained by rolling are high. During the rolling process, The outer diameter reduction rate can reach 40% respectively, which can get better forming effect and higher processing rate, but it is suitable for the production of small-diameter pipes, and it is difficult to process large-diameter, ultra-long and ultra-thin shells

Method used

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  • Manufacturing method of large-diameter ultra-long ultra-thin titanium alloy shell
  • Manufacturing method of large-diameter ultra-long ultra-thin titanium alloy shell
  • Manufacturing method of large-diameter ultra-long ultra-thin titanium alloy shell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: the preparation specification is Spinning Large Diameter Seamless TA1 Titanium Alloy Bottomless Cylindrical Shell

[0040] The TA1 titanium alloy forging rod is prefabricated and punched to prepare a cylinder without a bottom, and the extruded cylinder is prepared by reverse extrusion; the extruded cylinder is machined to obtain a size of For spinning blanks, the dimensional accuracy of the outer diameter of the blank is ±0.05mm, and the dimensional accuracy of the wall thickness is ±0.04mm. The spinning blank obtained by machining is subjected to multi-pass powerful spinning, the thinning rate of the first pass is 35%, the thinning rate of the second and fourth pass is 40%, and the thinning rate of the third pass is 40%. is 45%, the feed ratio of the first pass is 0.8mm / r, the feed ratio of the last three passes is 1.6mm / r, and the total deformation is 85%, and the size of the semi-finished titanium alloy cylinder obtained is The spinning semi-finish...

Embodiment 2

[0041] Embodiment 2: the preparation specification is Spinning large diameter seamless TA3 titanium alloy bottomed cylindrical shell

[0042] The TA3 titanium alloy forging rod is prefabricated and punched to prepare a cylinder with a bottom, and the cylinder is machined to obtain a size of For spinning blanks, the dimensional accuracy of the outer diameter of the blank is ±0.05mm, and the dimensional accuracy of the wall thickness is ±0.04mm. The spinning blank obtained by machining is subjected to multi-pass powerful spinning, the thinning rate of the first pass is 30%, the thinning rate of the second and fourth pass is 40%, and the thinning rate of the third pass is 30%. is 45%, the feed ratio of the first pass is 0.8mm / r, the feed ratio of the last three passes is 2mm / r, the total deformation is 81.7%, and the size of the titanium alloy semi-finished product cylinder is The spinning semi-finished cylinder body is annealed by intermediate heat treatment. The annealing t...

Embodiment 3

[0043] Example 3: Preparation of spinning seamless TB2 titanium alloy special-shaped shell without bottom

[0044] The TB2 titanium alloy forging rod is prefabricated and punched to prepare a cylinder without a bottom, and the cylinder is machined to obtain a size of For spinning blanks, the dimensional accuracy of the outer diameter of the blank is ±0.05mm, and the dimensional accuracy of the wall thickness is ±0.04mm. The spinning blank obtained by machining is subjected to multi-pass powerful spinning, the thinning rate of the first pass is 30%, the thinning rate of the last three passes is 40%, and the feed ratio of the first pass is 0.8mm / r , the feed ratio of the last three passes is 1.5mm / r, the total deformation is 75%, and the size of the titanium alloy semi-finished product cylinder is obtained as The spinning semi-finished cylinder body is annealed by intermediate heat treatment. The annealing temperature is 800°C, and it is kept in a vacuum furnace for 1 hour to...

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Abstract

The invention relates to a manufacturing method of a large-diameter ultra-long ultra-thin titanium alloy shell, and belongs to the field of non-ferrous metal processing. The manufacturing method comprises the steps that a titanium alloy forged rod is prefabricated through punching to form a cylinder with the bottom or without the bottom, and backward extrusion molding is adopted to form an extruded cylinder; a titanium alloy spinning blank with the dimension and the dimensional accuracy meeting the requirements is obtained through machining; multi-pass spinning machining is conducted, and the organization of the titanium alloy cylinder is improved by the use of cold machining and large deformation, so that a titanium alloy semi-finished cylinder is obtained; intermediate annealing heat treatment is conducted; multi-pass finished product precise spinning machining is conducted, so that a titanium alloy finished shell meeting the dimensional requirement is obtained; and finished product annealing treatment is conducted, so that the large-diameter ultra-long ultra-thin titanium alloy shell with mechanical properties and microstructures meeting the requirements is obtained. By the adoption of the manufacturing method, the large-diameter ultra-long ultra-thin titanium alloy shell which is higher in quality and more excellent in performance can be produced, and the yield of thin-wall shells can be greatly improved.

Description

technical field [0001] The invention relates to a preparation and processing method of a large-diameter, super-long and ultra-thin titanium alloy shell, belonging to the field of non-ferrous metal processing. Background technique [0002] Titanium alloy shell has excellent comprehensive properties, such as low density, high specific strength, good fatigue strength and crack growth resistance, excellent corrosion resistance, good welding performance, etc., so it is widely used in aviation, aerospace, automobile, shipbuilding, energy and other industries It has increasingly wide application prospects. [0003] In the process of titanium alloy from blank to finished shell, the processing methods are mainly spinning and rolling. The stress state provided by rolling is suitable for the plastic deformation of the metal cylinder. It can produce seamless tubes of titanium alloys with high strength and poor plasticity. The surface quality and precision of the cylinder obtained by ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 刘贤钙郭胜利李德富