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High superficial hardness high temperature resistant casting titanium alloy and manufacturing method thereof

A technology for casting titanium alloy and manufacturing method, which is applied in the field of high surface hardness and high temperature resistant casting titanium alloy and its manufacturing field, and can solve the problems of low mechanical properties, poor wear resistance and large specific gravity of copper-based alloys.

Active Publication Date: 2009-07-08
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the control valve system equipment of nuclear power plants mainly uses special steel, copper alloy and other materials, but these equipment have poor seawater corrosion resistance and erosion corrosion resistance. Secondly, copper-based alloys for nuclear power have low mechanical properties, poor wear resistance, and large specificity. , cannot meet the requirements for use

Method used

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  • High superficial hardness high temperature resistant casting titanium alloy and manufacturing method thereof
  • High superficial hardness high temperature resistant casting titanium alloy and manufacturing method thereof
  • High superficial hardness high temperature resistant casting titanium alloy and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Sponge Ti, pure Al, Al-Mo (1:1) master alloy, Al-V (1:1) master alloy, Al-Cr (1:1) master alloy, sponge Zr are used as raw materials, and the particle size is required to be 5 ~16mm, according to 6.2% Al, 1.3% Mo, 1.5% V, 1.6% Cr, 1.9% Zr, the rest is Ti to prepare the alloy material, extruded on the press to form an electrode, and then the consumable electrode is subjected to a second vacuum arc Furnace smelting into alloy ingots, and finally cast titanium alloy products under the condition that the vacuum degree is less than 10Pa in the vacuum casting furnace. Such as the 11# sample in Table 4.

Embodiment 2

[0028] Sponge Ti, pure Al, Al-Mo (1:1) master alloy, Al-V (1:1) master alloy, Al-Cr (1:1) master alloy, sponge Zr are used as raw materials, and the particle size is required to be 5 ~16mm, according to 6.5% Al, 1.8% Mo, 1.7% V, 1.8% Cr, 2.0% Zr, the rest is Ti to prepare the alloy material, extruded on the press to form an electrode, and then the consumable electrode is subjected to a second vacuum arc Furnace smelting into alloy ingots, and finally cast titanium alloy products under the condition that the vacuum degree is less than 10Pa in the vacuum casting furnace. Such as the 21# sample in Table 4.

Embodiment 3

[0030] Sponge Ti, pure Al, Al-Mo (1:1) master alloy, Al-V (1:1) master alloy, Al-Cr (1:1) master alloy, sponge Zr are used as raw materials, and the particle size is required to be 5 ~16mm, according to 6.7% Al, 2.3% Mo, 2.1% V, 2.1% Cr, 2.0% Zr, the rest is Ti to prepare the alloy material, extruded on the press to form an electrode, and then the consumable electrode is subjected to a second vacuum arc Furnace smelting into alloy ingots, and finally cast titanium alloy products under the condition that the vacuum degree is less than 10Pa in the vacuum casting furnace. Such as the 31# sample in Table 4.

[0031] Table 3 Casting properties and room temperature mechanical properties of cast titanium alloys with this function

[0032]

[0033]

[0034] Table 4 High temperature mechanical properties and hardness of cast titanium alloys with this function

[0035]

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Abstract

The invention discloses a high superficial hardness fire-resistant casted titanium alloy and a method for producing the same, wherein, the titanium alloy consists of Ti-(5.5-6.9)Al-(0.5-2.5)Mo-(1.0-2.5)V-(0.8-2.3)Cr-(1.5-2.5)Zr.The method comprises steps of mixing sponge Ti, pure Al, Al-Mo alloy, Al-V alloy, Al-Cr alloy and sponge Zr together by batching, performing extrusion pressing to form consumable electrodes, forming alloy casting ingot through a second smelting in a vacuum arc furnace, pouring in plumbago models in a vacuum skull casting furnace for shaping, the formed product has a alloy rigidity performance HRC equal to or larger than 38, a high-temperature mechanical performance Rm equal to or larger than 700MPa and Rp0.2 equal to or larger than 600 Mpa. The produced alloy which satisfies the operating requirements of air charging and discharging system equipment for marine diesel and special type valve members for nuclear power has reached an equipment application level and supplies a gap of functional casting of titanium alloy.

Description

technical field [0001] The invention relates to a cast titanium alloy material technology, in particular to a cast titanium alloy with high surface hardness and high temperature resistance and a manufacturing method thereof. Background technique [0002] With the development of technology, in some special application fields, special requirements are put forward for materials. For example, the working environment of the ship's intake and exhaust devices is: diesel engine combustion gas at 350 ° C, alternating pressure in the range of 0.098 to 3.0 MPa, which requires equipment materials to have good seawater corrosion resistance, high temperature mechanical properties, and good castability. In addition to the above characteristics, the valve also requires high surface hardness. At present, the control valve system equipment of nuclear power plants mainly uses special steel, copper alloy and other materials, but these equipment have poor seawater corrosion resistance and erosi...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/03
Inventor 杨学东王孟光
Owner LUOYANG SUNRUI TI PRECISION CASTING
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