Method for adding oxygen and iron in titanium alloy

A technology for titanium alloys and alloying elements, applied in the field of co-addition of oxygen and iron in titanium alloys, can solve problems such as low iron addition, damage to alloy service performance, uneven micro-area, etc., to achieve quality improvement, low input cost, and method Effects in simple steps

Active Publication Date: 2013-03-20
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to TiO 2 The melting point of TiO is around 1850°C. In the case of insufficient mixing or unsatisfactory control of the smelting process, uneven micro-regions may occur, and even non-melting TiO 2 Existence; while the addition of iron is too low, it is easy to cause micro-area inhomogeneity when adding bulk metal raw materials
These ingot metallurgical quality problems are difficult to detect in the early stage, and are the places where cracks are most likely to initiate, which will seriously damage the service performance of the alloy

Method used

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  • Method for adding oxygen and iron in titanium alloy
  • Method for adding oxygen and iron in titanium alloy
  • Method for adding oxygen and iron in titanium alloy

Examples

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Embodiment 1

[0058] In this embodiment, the method for adding oxygen and iron in the titanium alloy comprises the following steps:

[0059] Step 1. Determination of raw material components and proportions: according to the nominal chemical composition of the titanium alloy to be prepared, the components of the raw materials used to prepare the titanium alloy and the proportions of each component are determined;

[0060] The raw materials include titanium sponge, mixed powder for adding oxygen and iron elements and materials for adding other alloy elements.

[0061] When carrying out raw material component and proportioning to determine in step 1, its determination process is as follows:

[0062] Step 101, determining the alloy elements of each component: according to the nominal chemical composition of the titanium alloy to be prepared, calculate the content of the alloy elements of each component, including the content of oxygen element w O1 and iron content w Fe1 , the content of oxyge...

Embodiment 2

[0084] In this embodiment, the difference from Example 1 is that the nominal chemical composition of the titanium alloy to be prepared in step 101 is Ti-6Al-4V-0.15Fe-0.18O, that is, Al: 6.0% by weight percentage, V: 4.0%, Fe:0.15%, O:0.18%, the balance is Ti and unavoidable impurity; In step 102, the materials used to mix other alloying elements include Al-85V intermediate alloy and aluminum beans; wherein Al-85V intermediate The alloy is fine particles, and its particle size is below 4mm; the selected sponge titanium is grade 1 sponge titanium, and the content of O element in the selected sponge titanium raw material is 0.07%, and the content of Fe element is 0.05%; The B component is TiO 2 powder, that is, the mixed powder consists of FeTiO 3 Powder and TiO 2 The powder is uniformly mixed, and the particle size of the mixed powder is 80 mesh; therefore, the raw materials used include Al-85V master alloy, aluminum beans, 0-grade sponge titanium and FeTiO 3 Powder and TiO ...

Embodiment 3

[0092] In this embodiment, the difference from Example 1 is that the nominal chemical composition of the titanium alloy to be prepared in step 101 is Ti-6Al-4V-0.25Fe-0.15O, that is, Al: 6.0% by weight percentage, V: 4.0%, Fe:0.25%, O:0.15%, the balance is Ti and unavoidable impurity; In step 102, the material used to mix other alloy elements includes Al-85V intermediate alloy and aluminum beans; wherein Al-85V intermediate The alloy is fine particles, the content of O element in the selected sponge titanium raw material is 0.07%, and the content of Fe element is 0.05%; the selected sponge titanium is grade 1 sponge titanium, and the particle size of the sponge titanium is below 4mm ; The selected B component is Fe 2 o 3 powder, that is, the mixed powder consists of FeTiO 3 Powder and Fe 2 o 3 The powder is uniformly mixed, and the particle size of the mixed powder is 80 mesh; therefore, the raw materials used include Al-85V master alloy, aluminum beans, 0-grade sponge tit...

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Abstract

The invention discloses a method for adding oxygen and iron in titanium alloy. According to the method, an oxygen element and an iron element contained in the titanium alloy required to be prepared are added in the form of mixed powder, the mixed powder is formed by uniformly mixing a component A and a component B, the component A is FeTiO3 powder, and the component B is Fe2O3 powder or TiO2 powder. The method is simple in step, reasonable in design, low in investment cost, easy and convenient to operate and good in using effect, and can effectively avoid the phenomena of micro-cell non-uniformity and unfused TiO2 caused when industrial iron and TiO2 powder serve as intermediate alloys are added.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy preparation, in particular to a method for co-adding oxygen and iron in titanium alloy. Background technique [0002] Ti-6Al-4V titanium alloy (or TC4 titanium alloy) is currently the most used α+β two-phase titanium alloy. In addition to the main elements such as Al and V, the alloy also contains a small or trace amount of O, Fe, C , N and other interstitial elements or impurity elements. A large number of studies have shown that the content of interstitial elements and impurity elements in the alloy has a significant impact on the processability and final performance of the material. The increase of the content of interstitial elements such as O, C, and N will increase the strength of the alloy, but will reduce the plasticity and processability of the alloy, and the damage of N and C to the plasticity of the alloy is particularly obvious. When the interstitial element O in the alloy is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/02
Inventor 葛鹏卢亚锋李倩周伟
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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