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Cast Ti-Si eutectic alloy containing intermetallic compound reinforcement phase

A technology of intermetallic compounds and eutectic alloys, applied in the field of casting high-strength wear-resistant Ti-Si eutectic alloys and high-strength casting Ti-Si eutectic alloys, can solve the problems of low strength and wear resistance of engineering titanium alloys, Achieve excellent high-temperature mechanical properties, improve compressive strength, and excellent mechanical properties

Active Publication Date: 2015-03-25
UNIV OF SCI & TECH BEIJING +2
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the strength and wear resistance of existing engineering titanium alloys are not high, and they cannot meet the requirements on many components that require wear resistance.

Method used

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  • Cast Ti-Si eutectic alloy containing intermetallic compound reinforcement phase
  • Cast Ti-Si eutectic alloy containing intermetallic compound reinforcement phase
  • Cast Ti-Si eutectic alloy containing intermetallic compound reinforcement phase

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Embodiment 1-15

[0036] The inventor conducted experiments on 15 kinds of Ti-Si alloys, and the compositions of the 15 kinds of alloys in the examples are shown in Table 1.

[0037] Casting method 1: The metal raw materials used to prepare the master alloy are all pure metal elemental elements with a purity greater than 99.9%. According to the chemical composition of the alloy, the ingredients are melted in a vacuum induction magnetic levitation melting furnace. The crucible is a water-cooled copper crucible. The melting vacuum is 0.01-1Pa. After the alloy is melted, it is poured into a mold with a diameter of 10mm and a length of 100mm. The microstructure of the embodiment 5 alloy prepared according to the casting method is as follows: figure 1 shown.

[0038] Casting method 2, the metal raw materials used in the preparation of the master alloy are all pure metal elemental elements with a purity greater than 99.9%, prepared according to weight percentage, mixed uniformly, pressed into elect...

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Abstract

The invention discloses a cast Ti-Si eutectic alloy containing an intermetallic compound reinforcement phase, belonging to the field of a metal material. The cast Ti-Si eutectic alloy comprises the following components in percentage by weight: 8.51-11.5% of Si, 3-9% of Al, 0.5-5% of V, 0.01-0.25% of B, 0.3-10% of stable beta-phase additional elements Mo, Nb and Ta, and the balance of Ti and inevitable impurities. Ti-Si-Al-V-B is taken as basic alloy system and the performance optimization is realized by adding Mo, Nb and Ta and other elements. The alloy has superhigh strength, good high-temperature anti-oxidization and high-temperature wear resistance properties by utilizing high Si content and through optimized cooperation between Si and elements Al, V, Mo, Nb, Ta and B. The maximum compression strength of the Ti-Si alloy is more than 2100MPa, and the hardness is 50HRC. The alloy is suitable for manufacturing parts requiring high temperature, wear resistance, corrosion resistance in the fields of aerospace, automobile, ships and warships, and the like.

Description

technical field [0001] The invention belongs to the field of metal materials, and relates to a casting high-strength and wear-resistant Ti-Si eutectic alloy containing an intermetallic compound reinforcing phase, and more specifically relates to a Ti, Si, Al, V, Nb, Ta and B eutectic alloy containing Ti, Si, Al, V, Nb, Ta and B High strength cast Ti-Si eutectic alloy. Background technique [0002] Titanium alloy material is one of the most important lightweight and high-strength materials for engineering applications today. It is widely used in the fields of aerospace, ship, automobile, chemical industry, medical equipment and sporting goods. However, the strength and wear resistance of existing engineering titanium alloys are not high, and they cannot meet the requirements on many components that require wear resistance. In terms of alloy varieties, there are more forged titanium alloys and less cast titanium alloys, and the development is relatively lagging behind. In t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00
Inventor 惠希东蔡元华张国华张卫正冯增建于勇张孟枭王璐
Owner UNIV OF SCI & TECH BEIJING
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