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WSTi64E high-damage-tolerance super-large-size titanium alloy cast ingot and preparation method thereof

A damage-tolerant, super-large-scale technology, applied in the field of titanium alloys, can solve problems such as segregation of aluminum elements and hard inclusions, and achieve the effects of reducing the content of impurity elements, avoiding metallurgical defects, and avoiding electrode oxidation.

Inactive Publication Date: 2017-05-10
西部超导材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a WSTi64E super-sized titanium alloy ingot with high damage tolerance, which solves the metallurgical defects of aluminum element segregation and hard inclusions produced by conventional smelting methods.

Method used

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  • WSTi64E high-damage-tolerance super-large-size titanium alloy cast ingot and preparation method thereof
  • WSTi64E high-damage-tolerance super-large-size titanium alloy cast ingot and preparation method thereof
  • WSTi64E high-damage-tolerance super-large-size titanium alloy cast ingot and preparation method thereof

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preparation example Construction

[0034] The above WSTi64E high damage tolerance ultra-large specification titanium alloy ingot preparation method specifically includes the following steps:

[0035] Step 1, prepare electrodes:

[0036] According to the weight percentage of each element: Al: 5.8% ~ 6.5%, V: 3.6% ~ 4.4%, Fe: 0.10% ~ 0.25%, C: 0.01% ~ 0.05%, O: 0.05% ~ 0.12%, N<0.03 %, H<0.0125%, the balance is Ti and unavoidable impurities, the total amount of impurity elements does not exceed 0.10%, the sum of the weight percentages of the above components is 100%, calculate the alloy ratio and weigh the vanadium content as 40.0% ~60.0% granular aluminum-vanadium alloy, granular aluminum-iron alloy with iron content of 50.0%-70.0%, and granular aluminum beans, carbon powder and titanium dioxide powder, and small particle sponge titanium with a particle size of 0.83-12.7mm. The block electrode is mixed, and pressed into an electrode block with a large hydraulic press, the pressing pressure is ≥ 20MPa, and the p...

Embodiment 1

[0047] Step 1, according to the weight percentage of each element: Al6.5%, V4.4%, Fe0.25%, C0.05%, O0.10%, the balance is Ti and unavoidable impurities, the total amount of impurity elements is not More than 0.15%, the sum of the weight percentages of the above components is 100%, and the granular aluminum-vanadium alloy with a vanadium content of 40.0% to 60.0%, the granular aluminum-iron alloy with an iron content of 50.0% to 70.0%, and the granular Aluminum beans, carbon powder and titanium dioxide powder are mixed with small particle sponge titanium with a particle size of 0.83-12.7mm for a single electrode;

[0048] Step 2. Pour the raw materials mixed in step 1 into the cavity of a large hydraulic press and press it into a dense electrode block with a pressing force of 20MPa and a holding time of 4s;

[0049] Step 3, clamp the electrode block with a clamp, and use a non-tungsten argon shielded plasma box to weld the pressed electrode block into a self-consumable electrod...

Embodiment 2

[0055] Step 1, according to the weight percentage of each element: Al6.2%, V4.0%, Fe0.15%, C0.03%, O0.095%, the balance is Ti and unavoidable impurities, the total amount of impurity elements is not More than 0.15%, the sum of the weight percentages of the above components is 100%, and the granular aluminum-vanadium alloy with a vanadium content of 40.0% to 60.0%, the granular aluminum-iron alloy with an iron content of 50.0% to 70.0%, and the granular Aluminum beans, carbon powder and titanium dioxide powder are mixed with small particle sponge titanium with a particle size of 0.83-12.7mm for a single electrode;

[0056] Step 2, pour the raw materials mixed in step 1 into the cavity of a large hydraulic press and press it into a dense electrode block, the pressing force is 25MPa, and the holding time is 6s;

[0057] Step 3, clamp the electrode block with a clamp, and use a non-tungsten argon shielded plasma box to weld the pressed electrode block into a self-consumable electr...

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Abstract

The invention discloses a WSTi64E high-damage-tolerance super-large-size titanium alloy cast ingot which is composed of the following elements in percentage by weight: 5.8-6.5% of Al, 3.6-4.4% of V, 0.10-0.25% of Fe, 0.01-0.05% of C, 0.05-0.12% of O, less than 0.03% of N, less than 0.0125% of H, and the balance of Ti and inevitable impurities. The total amount of the impurity elements does not exceed 0.10%. The invention also discloses a preparation method of the titanium alloy. The WSTi64E high-damage-tolerance super-large-size titanium alloy cast ingot has the advantages of high transverse and longitudinal uniformity of chemical components and lower impurity content, successfully makes a breakthrough in the chemical component uniformity control technology of industrial 5t and 8t large-size cast ingots, reduces the burning loss of the aluminum element in the smelting process, effectively controls the interstitial element content, and avoids the niggerheads formed by the high-melting-point vanadium element and other metallurgical defects.

Description

technical field [0001] The invention belongs to the technical field of titanium alloys, and in particular relates to a WSTi64E super-sized titanium alloy ingot with high damage tolerance, and also relates to a preparation method of the WSTi64E super-large titanium alloy ingot with high damage tolerance. Background technique [0002] In the fields of aviation, aerospace and navigation, titanium alloy parts need to serve stably for a long time under conditions of high speed, high pressure and vibration, and the alloy often breaks before reaching the ultimate strength. In order to improve the service life and stability of titanium alloy parts, designers put forward damage tolerance requirements for titanium alloy rods, that is, the alloy has low crack growth rate and high fracture toughness on the basis of maintaining static strength. and anti-fatigue properties. It is difficult to solve the contradiction between high strength, high fracture toughness and low crack growth rate...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/02
CPCC22C14/00C22C1/02
Inventor 罗文忠孙峰赵小花曹国鑫何永胜杜玉俊张小航王凯旋冯勇
Owner 西部超导材料科技股份有限公司
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