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High temperature titanium alloy and surface modification method thereof

A high-temperature titanium alloy and surface modification technology, which is applied in metal material coating process, ion implantation plating, coating, etc., can solve the problems of strengthening plasticity reduction and affecting the use of alloys, so as to improve performance and high temperature The effect of antioxidant properties

Inactive Publication Date: 2010-07-07
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the inevitable oxidation of alloys at high temperatures, the degree of plasticity decline is enhanced
With the increase of the alloy's service temperature, the oxidation problem will become more prominent, which will seriously affect the use of the alloy

Method used

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  • High temperature titanium alloy and surface modification method thereof
  • High temperature titanium alloy and surface modification method thereof
  • High temperature titanium alloy and surface modification method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Commercially available sponge titanium, sponge zirconium, pure aluminum, pure silicon, aluminum-molybdenum master alloy, aluminum-neodymium master alloy, titanium-niobium-tantalum master alloy and aluminum-tin master alloy are according to the composition ratio of Table 1 (weight percentage, the same below) The electrode block is prepared, and the electrode block is welded into a vacuum consumable electrode in a vacuum plasma box, and then subjected to three times of vacuum consumable melting to form an ingot. The ingot is forged at the phase transition point, and after intermediate forging, it is made into a φ35mm rolled billet. After the billet is heated to 1150°C, it is rolled into a φ15mm bar on a transverse rolling mill.

[0036] After the rolled bar is processed by the heat treatment system listed in Table 2, the mechanical properties are tested according to the requirements of GB / T228-2002. The mechanical properties are shown in Table 2. After the rolled bar is s...

Embodiment 2

[0045] Commercially available sponge titanium, pure hafnium, pure aluminum, pure silicon, aluminum-molybdenum master alloy, aluminum-yttrium master alloy, titanium-niobium master alloy, aluminum-gallium master alloy and aluminum-tin master alloy were prepared into electrodes according to the composition ratio in Table 4 The electrode block is welded into a vacuum consumable electrode in a vacuum plasma box, and then undergoes three vacuum consumable smelting to make an ingot. The ingot is forged at the phase transition point, and after intermediate forging, it is made into a φ35mm rolled billet. After the billet is heated to 1150°C, it is rolled into a φ15mm bar on a transverse rolling mill.

[0046] After the rolled bar is processed by the heat treatment system listed in Table 5, the mechanical properties are tested according to the requirements of GB / T228-2002. The mechanical properties are shown in Table 5. After the rolled bar is subjected to the ion implantation and heat ...

Embodiment 3

[0054] Commercially available sponge titanium, sponge zirconium, pure aluminum, pure silicon, aluminum-molybdenum master alloy, aluminum-erbium master alloy, titanium-niobium master alloy and aluminum-tin master alloy were prepared into electrode blocks according to the composition ratio in Table 7, and the electrode blocks were prepared in Vacuum consumable electrodes are welded in a vacuum plasma box, and then vacuum consumable melting is performed three times to make ingots. The ingot is forged at the phase transition point, and after intermediate forging, it is made into a φ35mm rolled billet. After the billet is heated to 1150°C, it is rolled into a φ15mm bar on a transverse rolling mill.

[0055] After the rolled bar is processed by the heat treatment system listed in Table 8, the mechanical properties are tested according to the requirements of GB / T228-2002. The mechanical properties are shown in Table 8. After the rolled bar was subjected to the ion implantation and he...

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Abstract

The invention relates to a high temperature titanium alloy and a surface modification method thereof, in particular relating to a high temperature titanium alloy containing rare earth elements and a surface modification method thereof. The alloy in the invention comprises the following raw materials: 5.5-7wt% of Al, 0.5-3wt% of Sn and / or Ga, 0.08-0.2wt% of O, 7.5-8.5 wt% of [Al], 0.45-0.55wt% of Si, 4-5.5wt% of Zr or Hf, 0.3-0.5wt% of Mo, 0.3-0.5wt% of Nb and / or Ta, 0.6-0.85wt% of rare earth elements Y, Nd or Er and the balance titanium. The tensile strength of the alloy in the invention at room temperature is not lower than 1100MPa, the tensile strength at the high temperature of 650 DEG C is not lower than 650MPa; and surface modification is carried out on the high temperature titanium alloy in the invention by adopting the method of ion implantation, and the high temperature property of the alloy can be greatly improved after surface modification.

Description

technical field [0001] The invention relates to a high-temperature titanium alloy and a surface modification method thereof, in particular to a high-temperature titanium alloy containing rare earth elements and a surface modification method thereof. Background technique [0002] The development of aero-engines with large thrust-to-weight ratio and long life is one of the important goals pursued by the continuous development of aero-vehicles. Requirements such as high temperature resistance, high specific strength, fatigue resistance, corrosion resistance, long life and low cost have become the criteria for aircraft engine material selection. [0003] High-temperature components in gas turbine engines mostly use nickel-based alloys and iron-based alloys. Although their operating temperatures are high, the biggest disadvantage is that they are too dense. In addition to its high service temperature, high-temperature titanium alloys have the greatest advantages of low density a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C23C14/48
Inventor 惠松骁张翥于洋叶文君王希哲
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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