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Tungsten-containing titanium alloy smelting method

A technology of tungsten-titanium alloy and titanium alloy, applied in the field of smelting of tungsten-containing titanium alloy, can solve the problems of poor quality stability of tungsten-containing titanium alloy, increase the cost of titanium alloy, many intermediate processes, etc., and achieve significant economic benefits, no segregation and Inclusions, the effect of reducing production costs

Inactive Publication Date: 2011-02-09
XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the intermediate process of adding tungsten element in this way is various and difficult to control, thus greatly increasing the cost of titanium alloy, and the quality stability of tungsten-containing titanium alloy is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of the present invention will be described in detail below by taking the preparation of Ti-6.7Al-1.5Sn-1.5Zr-2Mo-0.7W-0.15Si alloy as an example.

[0027] 1) Ingredients and pressing

[0028] Sponge titanium, tungsten powder, Ti-32Mo master alloy, pure aluminum, pure zirconium, pure tin, Ti-Si master alloy are used as raw materials, and the proportion by weight is W: 0.7%, Al: 6.7%, Sn: 1.5%. , Zr: 1.5%, Ti-32Mo master alloy: 6.25%, Ti-Si master alloy: 0.3%, and the rest is sponge titanium. The mixture is 300Kg, and it is pressed into a single electrode block with a weight of 10Kg by a press.

[0029] 2) Electrode preparation

[0030] Vacuum plasma arc or vacuum electron beam electrode resistance welding method is used to weld the pressed electrode blocks into long strip electrodes, and the welding vacuum is less than 8Pa.

[0031] 3) One smelting

[0032] Use the strip electrode prepared in the previous step as the consumable electrode to melt...

Embodiment 2

[0041] This embodiment takes the preparation of Ti-6.2Al-2Sn-3.6Zr-0.7Mo-5.0W-0.15Si alloy as an example to describe the preparation method of the present invention in detail.

[0042] 1) Ingredients and pressing

[0043] Sponge titanium, tungsten powder, Ti-32Mo master alloy, pure aluminum, pure zirconium, pure tin, Ti-Si are used as raw materials, and the ratio by weight is W: 5%, Al: 6.2%, Sn: 2%, Zr : 3.6%, Ti-32Mo: 2.19%, Ti-Si: 0.3%, and the rest is titanium sponge. The mixed material is 300Kg, and it is pressed into a shape electrode with a single weight of 10Kg by a press.

[0044] 2) Electrode preparation

[0045] Vacuum plasma arc or vacuum electron beam electrode resistance welding method is used to weld the pressed electrode blocks into long strip electrodes, and the welding vacuum is less than 8Pa.

[0046] 3) One smelting

[0047] Use the strip electrode prepared in the previous step as the consumable electrode to melt in a vacuum consumable electric arc furna...

Embodiment 3

[0056] This embodiment takes the preparation of Ti-10W alloy as an example to describe the preparation method of the present invention in detail.

[0057] 1) Ingredients and pressing

[0058] Titanium sponge and tungsten powder are used as raw materials, and the ratio by weight is w: 10%, and the rest is 300Kg of titanium mixture, which is pressed into a single-piece electrode with a weight of 10Kg by a press.

[0059] 2) Electrode preparation

[0060]Vacuum plasma arc or vacuum electron beam electrode resistance welding method is used to weld the pressed electrode blocks into long strip electrodes, and the welding vacuum is less than 8Pa.

[0061] 3) One smelting

[0062] Use the strip electrode prepared in the previous step as the consumable electrode to melt in a vacuum consumable electric arc furnace to obtain an ingot. The diameter of the crucible is 160mm, the melting current is 2-5KA, and the melting voltage is controlled at 26-30V.

[0063] 4) Secondary smelting

...

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Abstract

The invention discloses a tungsten-containing titanium alloy smelting method. Based on weight percent, 0.1 to 10 percent of tungsten powder is added when granular or chip titanium alloy raw material is mixed, and a tungsten-containing titanium alloy ingot with uniform components is obtained through multiple vacuum arc remelting. The tungsten powder is used as a raw material to be added into the tungsten-containing titanium alloy; because middle processes of preparing a tungsten rod from the tungsten powder by powder metallurgy and subsequent deformation processing technology and performing vacuum arc remelting on the tungsten rod and titanium sponge to form titanium tungsten intermediate alloy are saved, the production cost of the tungsten-containing titanium alloy is greatly reduced, the tungsten-containing titanium alloy ingot with uniform components and no segregation or inclusion can be obtained, and obvious economic benefit can be achieved.

Description

technical field [0001] The invention belongs to the technical field of titanium alloys, and relates to a method for melting titanium alloys, in particular to a method for melting titanium alloys containing tungsten. Background technique [0002] Titanium alloy is an advanced material necessary for the manufacture of aviation and aerospace vehicles, and with the improvement of the performance requirements of aircraft, the requirements for the internal quality of titanium alloys are also getting higher and higher. At the same time, the preparation process of titanium alloys consumes a lot of electricity, which makes the cost of titanium alloys high, thus limiting the further application of titanium alloys, so it is necessary to continuously reduce the manufacturing cost of titanium alloys. [0003] High-temperature titanium alloys have been widely used in aero-engines due to their excellent thermal strength and high specific strength. In order to meet the needs of designing h...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/02
Inventor 周中波张利军田军强白钰刘娣余光华常辉薛祥义
Owner XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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