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An Al-Nb intermediate alloy and process for preparing same

A master alloy and alloy technology, which is applied in the field of aluminum-niobium master alloy and its preparation, can solve the problems of narrow adaptability, high cost, and inability to meet diversification, and achieve the effects of low production cost, low cost, and easy storage and transportation

Inactive Publication Date: 2005-06-22
张忠士
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

An existing aluminum-titanium rare earth compound master alloy smelted with titanium alloy (patent application number 94112628.5) has good oxidation resistance, but its cost is high and its adaptability is narrow (used for pure rare earth type titanium alloy smelting), which cannot meet the diversified requirements of modern titanium alloy production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Using the ignition smelting method outside the furnace: according to the conventional steps, the raw materials are dried, the furnace is built, the ingredients are prepared according to the weight percentage, the materials are evenly mixed, the furnace is loaded, smelted, cooled, the furnace is started, weighing, finishing, crushing, magnetic Selection, sampling analysis, packaging.

[0017] Concrete preparation process is as follows:

[0018] 1. Drying of raw materials: drying raw materials, masonry slag, and batching slag in a drying room at a temperature of 75°C (can be 75±5°C) for 24 hours (can be 24 to 72 hours);

[0019] 2. Weigh raw materials: Potassium chlorate is used as a catalyst during batching (adding weight is 2-15% of the total amount of raw materials)

[0020] Nb 2 o 5 Al CaF 2 KcO 3

[0021] 1kg 0.557kg 0.07kg 0.065kg

[0022] 3. Mix the materials; put the materials into the V-shaped mixer and mix evenly, the number of times is 6 times;

...

Embodiment 2～5

[0034] Embodiment 2~5. Operate according to the method of embodiment 1, see table 1 with embodiment 1 difference.

[0035] production process

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Abstract

The invention relates to the preparation of titanium alloy, more specifically an Al-Nb intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Al 15-55%, and balancing Nb. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of Nb2O5, the charged mixture includes, Al 0.423-1.07kg, CaF2 0.07-0.16kg, KCLO3 0.065-0.28kg, the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

Description

technical field [0001] The invention relates to the preparation of titanium alloys, in particular to an aluminum-niobium (niobium-based) master alloy used in the preparation of titanium alloys and a preparation method thereof. Background technique [0002] With the continuous development of titanium alloys, it is more and more necessary for the master alloy to be directly added to titanium for smelting, which avoids the cumbersomeness of simply adding metal elements separately, and the melting point of the niobium-based master alloy is lower than the highest melting point of each metal element; The melting point of AlNb alloy is 1835°C, while the melting point of Nb is 2468°C, which makes the preparation and smelting process of titanium alloy stable, and avoids the phenomenon that the melting current applied fluctuates and is not easy to control due to the inconsistency of the melting point of the metal element. An existing aluminum-titanium rare earth compound master alloy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C27/02
Inventor 张忠士郭淑君田福礼
Owner 张忠士
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