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Method for preparing titanium alloy cast ingot

A technology for titanium alloy and ingot is applied in the field of preparation of titanium alloy ingot, which can solve the problems of complex process, metallurgical defects, and high price of intermediate alloy, and achieve the effect of simple and easy operation of the preparation method and lower production cost.

Inactive Publication Date: 2012-08-29
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Usually, refractory metals are added as master alloys. Due to the need to add master alloys with high content of refractory metals, it is easy to produce non-melting blocks of master alloys in the ingot, forming serious metallurgical defects; in addition, master alloys with high refractory metal content are more expensive. , and it is difficult to break
[0005] The refractory metal and titanium powder are added by powder method. The addition of titanium powder will easily cause difficulty in controlling the oxygen content of the ingot, and the addition of titanium powder will increase the cost of the alloy and complicate the process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Low-cost preparation method of Ti-Mo-V-Fe-Al series titanium alloy: fine-grained titanium sponge with a diameter ranging from 1 to 8 mm and molybdenum powder with a particle size ranging from -100 to -200 mesh, according to the ratio of titanium sponge and molybdenum powder The weight percentage is 2:1, mix it on a mechanical mixer for 1.5 hours, mix it into the electrode block, and add other alloy elements V, Fe, Al, and press it into a dense electrode block by a hydraulic press, and pass the dense electrode block through argon The arc welding machine is welded into electrodes, and the electrodes are smelted into titanium alloy ingots in a vacuum consumable electric arc furnace, which has been tested as a homogeneous ingot without molybdenum element segregation and inclusions.

Embodiment 2

[0013] Low-cost preparation method of Ti-Mo-Zr-Sn series titanium alloy: fine-grained titanium sponge with a diameter ranging from 1 to 8 mm and molybdenum powder with a particle size ranging from -100 to -200 mesh, according to the weight percentage of titanium sponge and molybdenum powder Set the ratio of 3:1, mix it on a mechanical mixer for 3.5 hours, mix it into the electrode block, and add other alloy elements Zr and Sn, press it into a dense electrode block by a hydraulic press, and pass the dense electrode block through an argon arc welding machine The electrode is welded into an electrode, and the electrode is smelted into a titanium alloy ingot through a vacuum consumable electric arc furnace, which is detected as a homogeneous ingot without molybdenum element segregation and inclusion.

Embodiment 3

[0015] Low-cost preparation method of Ti-Al-Nb series titanium alloy: fine-grained titanium sponge with a diameter ranging from 1 to 8 mm and niobium powder with a particle size ranging from -150 to -200 mesh, the weight percentage of titanium sponge and niobium powder is 2 : 1 ratio, mixed on a mechanical mixer for 3 hours, mixed into the electrode block, and added other alloy elements Al, pressed into a dense electrode block by a hydraulic press, and welded the dense electrode block into an electrode by an argon arc welding machine. The titanium alloy ingot is smelted in a vacuum consumable electric arc furnace, which is tested as a homogeneous ingot without niobium element segregation and inclusion.

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Abstract

The invention discloses a preparation method of titanium alloy ingot. The method is that: fine-particle titanium sponge with average granularity ranging from 1 to 8mm and refractory metal powder with granularity from -100 to -200 meshes are stirred and blended for 1 to 5 hours in a mixer, according to a weight percentage of 2 - 5 : 1between titanium sponge and refractory metal powder, and then the mixture is put into an electrode block, other alloyed elements are added, and dense electrode blocks are pressed by a hydraulic machine; the dense electrode blocks are welded into electrodes via an argon arc welder, and molten into titanium alloy ingots by a vacuum self-consuming arc furnace. The preparation method of the invention is simple and easy to be operated, which can greatly reduce the production cost of titanium ingots, and the produced titanium alloy ingots are tested and proved to be homogeneous ingots without refractory metal elements segregation and impurities.

Description

technical field [0001] The invention relates to a method for preparing a titanium alloy ingot. Background technique [0002] Titanium alloys containing refractory metals have the characteristics of high specific strength, corrosion resistance, wide temperature resistance zone, and good welding performance. They play an extremely important role in the development of high-tech national defense, weapon equipment, and civilian industries. [0003] For titanium alloys containing refractory metals, the uniform distribution of refractory metal elements (such as Mo, Nb, etc.) in the ingot is the key to ensure subsequent processing and product quality. [0004] Usually, refractory metals are added as master alloys. Due to the need to add master alloys with high content of refractory metals, it is easy to produce non-melting blocks of master alloys in the ingot, forming serious metallurgical defects; in addition, master alloys with high refractory metal content are more expensive. , ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D23/06
Inventor 倪沛彤杨建朝韩明臣舒莹张英明王成长陈杜娟
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH