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Ternary alloy for improving titanium alloy ingredient homogeneity and preparing method and application of ternary alloy

A titanium alloy, uniformity technology, applied in the field of titanium alloy, can solve the problems of hidden quality, uneven composition, TC11 performance fluctuation, etc., and achieve the effect of improving production efficiency, low content of inclusions and gases, and strong process operability

Active Publication Date: 2017-10-31
宝武特种冶金有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] From the defect analysis of forgings and engines, there have been several cases of high-density inclusions caused by Mo segregation (such as figure 1 ), and due to the uneven composition of the main elements Mo and Si, it is easy to cause fluctuations in the performance of TC11, which brings hidden dangers to the quality

Method used

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  • Ternary alloy for improving titanium alloy ingredient homogeneity and preparing method and application of ternary alloy
  • Ternary alloy for improving titanium alloy ingredient homogeneity and preparing method and application of ternary alloy
  • Ternary alloy for improving titanium alloy ingredient homogeneity and preparing method and application of ternary alloy

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Experimental program
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Effect test

Embodiment 1

[0027] The master alloy is Al, MoO 3 After mixing according to a certain proportion, Al-Mo is obtained by conventional aluminothermic reaction smelting; then crystalline Si is added according to the proportion, and the composition of each element is uniformed by vacuum induction melting and the gas impurities such as O are controlled to obtain an alloy ingot. After finishing, Crushed, selected and other processes are made into powder products with a particle size of ≤1mm. The composition of the product is: Al: 36.0%, Mo: 58.0%, Si: 5.33%, O: 0.04%, and the rest are impurities. After mixing the master alloy (109.1Kg) with sponge titanium (1867.52Kg), TiO2 (3.347Kg), sponge Zr (32.254Kg) and other raw materials, the vacuum auto The titanium alloy electrode used for smelting, after three smelting under vacuum self-consumption, a high-temperature and high-strength TC11 titanium alloy with uniform composition was obtained. The chemical composition of different parts of the ingot m...

Embodiment 2

[0031] According to the method of example 1, the powdered product with particle size≤1mm is made. The composition of the product is: Al: 35.8%, Mo: 58.3%, Si: 5.5%, O: 0.05%, and the rest are impurities. After the master alloy (84.384Kg) is mixed with sponge titanium (1440.33Kg), TiO2 (1.38Kg), sponge Zr (26.326Kg) and other raw materials, the vacuum self-consumption The titanium alloy electrode used for smelting is smelted three times by vacuum self-consumption to obtain a high-temperature and high-strength TC11 titanium alloy with uniform composition. The chemical composition of different parts of the ingot meets the corresponding technical requirements, and the composition uniformity of Mo and Si is good; the specific inspection results As shown in Table 3, it is suitable for key parts of aero-engines.

[0032] Table 3 Composition wt% of TC11 titanium alloy finished ingot

[0033]

[0034] The invention achieves the effect that only one kind of master alloy replaces mu...

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Abstract

The invention relates to a ternary alloy for improving the titanium alloy ingredient homogeneity and a preparing method and application of the ternary alloy. A ternary intermediate alloy for improving the TC11 titanium alloy ingredient homogeneity is provided, and is basically composed of 5%-6% of Si, 55%-60% of Mo and the balance Al. Meanwhile, a preparing method and application of the ternary intermediate alloy are further provided. The ternary intermediate alloy is suitable for serving as a raw material of a high-strength high-temperature titanium alloy TC11; compared with other ternary alloys, the weight percentage of the Si is improved, the ingredient scope of the high-melting-point element Mo is shrunk, and therefore the smelting process of the ternary alloy is controllable, smelted cast condition blocks are better in crushing performance, powder-like products with the granularity smaller than or equal to 1 mm can be obtained, the ingredient homogeneity of the main elements including Si, Mo and Al in the TC11 alloy can be effectively improved, the probability that the high-melting-point element Mo forms high density inclusion segregation defects in the cast ingot smelting process is reduced, and the ingredient homogeneity of TC11 titanium alloy cast ingots and titanium materials is guaranteed.

Description

technical field [0001] The invention relates to a titanium alloy, in particular to a TC11 titanium alloy and a preparation method of the titanium alloy. Background technique [0002] TC11 titanium alloy is a high-temperature, high-strength new metal material, containing 85% to 90% titanium, and the rest is a small amount of impurities such as aluminum Al, molybdenum Mo, silicon Si, O, etc. It has a light specific gravity (about 4.5g / cm2, steel 7.8g / cm2), corrosion resistance, high strength, good plasticity, working temperature can be as high as 450 ℃ ~ 500 ℃ (higher than the general titanium alloy material) and many other advantages, so it is widely used in engines, blades, missiles and other key parts. [0003] In recent years, with the rapid development of the defense industry, TC11 has been used as one of the titanium alloy strategic materials due to its excellent comprehensive performance, and is increasingly used in aerospace weapons and other fields. Due to the harsh ...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C14/00C22C27/04
Inventor 闵新华黄爱军杨义计波
Owner 宝武特种冶金有限公司
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