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Preparing method of low-interstitial and large-size TC4 titanium alloy ingot

A large-scale, titanium alloy technology, applied in the field of preparation of large-scale TC4 titanium alloy ingots with low gaps, can solve problems such as high content of interstitial elements, small ingot sizes, and uneven ingot composition

Active Publication Date: 2018-02-09
重庆金世利航空材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing low-gap and large-scale TC4 titanium alloy ingots. Through this technical solution, it is possible to solve the problem of uneven composition of existing titanium alloy ingots, high content of interstitial elements, small ingot specifications, and metallurgical problems. Unstable quality and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: This example is a method for preparing a large-scale ingot of a low-interval TC4 titanium alloy.

[0021] Step 1. Use 0-grade sponge titanium, industrial pure aluminum, and Al-V master alloy as raw materials. The Al-V master alloy is added at a ratio of 4% of V content, and the remaining aluminum content is added in the form of pure aluminum particles. After mixing evenly on the material system, use a 10,000-ton hydraulic press to directly press into an integral electrode block of φ450×5000 mm; the mass purity of the sponge titanium is not less than 99.65%, and the mass purity of industrial pure aluminum is not less than 99.95%, while the Al The mass purity of -V master alloy is not less than 99.8%.

[0022] Step 2: Bundle three consumable electrode blocks side by side, melt the upper end surface of the consumable electrode block and the lower end surface of the auxiliary electrode in a vacuum consumable arc furnace, and weld to obtain a consumable electrode....

Embodiment 2

[0027] Embodiment 2: This example prepares the preparation method of TC4 titanium alloy large-scale ingot.

[0028] Step 1. Use 0-grade sponge titanium, industrial pure aluminum, and Al-V master alloy as raw materials. The Al-V master alloy is added at a ratio of 4% of V content, and the remaining aluminum content is added in the form of pure aluminum particles. After mixing evenly on the material system, use a 10,000-ton hydraulic press to directly press into an integral electrode block of φ850×5000 mm; the mass purity of the sponge titanium is not less than 99.65%, the mass purity of industrial pure aluminum is not less than 99.95%, and the Al The mass purity of -V master alloy is not less than 99.8%.

[0029] Step 2: In a vacuum consumable electric arc furnace, the upper end surface of the consumable electrode block and the lower end surface of the auxiliary electrode are melted after arcing, and welded to obtain a consumable electrode. The diameter of the crucible for plac...

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Abstract

The invention discloses a preparing method of a low-interstitial and large-size TC4 titanium alloy ingot. The specific technical scheme comprises the following steps: choosing corresponding raw materials according to TC4 alloy components, carrying out proportioning and weighing, uniformly mixing the prepared raw materials through an automatic material mixing and distributing machine, adopting a ten-thousand-ton oil press to press the raw materials into a large-size integral consumable electrode, carrying out smelting to obtain primary ingots, welding two primary ingots to obtain a secondary consumable electrode, carrying out smelting to obtain a secondary ingot, and carrying out smelting again to obtain an ingot finished product. The preparing method has the advantages that through preparing the integral consumable electrode and three-step vacuum consumable smelting, the problems that the large-size TC4 titanium alloy ingot produced by the existing preparing technology is unstable in metallurgical quality and high in interstitial element content are solved, and the metallurgical quality of the large-size TC4 titanium alloy ingot is ensured.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy material processing, and in particular relates to a method for preparing a low-gap and large-size TC4 titanium alloy ingot. Background technique [0002] TC4 alloy was originally successfully developed by the United States in 1954. It has now developed into an international titanium alloy. It is the most comprehensive and in-depth titanium alloy studied by people. It has been widely used in aviation, aerospace, civil and other industries. . TC4 titanium alloy has good room temperature and high temperature mechanical properties, and is widely used in the manufacture of various aerospace structural parts and fan blades of aero-engines, compressor disks, aerospace vehicle pressure vessels, structural parts, etc. above 50. The alloy is a kind of α+β titanium alloy with good comprehensive performance, which has good process plasticity and superplasticity. Used in the annealed or solution-aged...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C14/00
CPCC22C1/03C22C14/00
Inventor 刘和平刘亮亮张军政
Owner 重庆金世利航空材料有限公司
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