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Molybdenum-aluminum intermediate alloy and production method thereof

An intermediate alloy and production method technology, applied in the field of metallurgy, can solve problems such as factory and employee safety hazards, reduced alloy yield, and violent reaction, and achieve the effects of reducing impurity content, prolonging reaction time, and controlling reaction speed

Inactive Publication Date: 2013-11-20
BHN SPECIAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the particles of molybdenum dioxide and molybdenum trioxide are very small, it is easy to cause violent reaction, splashing or even explosion, which brings great hidden dangers to the safety of the factory and employees; and because the reaction is too violent, it is easy to cause material splashing, making the alloy lower yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Molybdenum oxide granulation steps are as follows:

[0035] Take 120kg molybdenum dioxide, 157kg molybdenum trioxide and 14kg C6H10O5 solution, solution concentration: 1.5%. The above materials were mixed evenly and added to a tablet press, and then the materials compressed into tablets were placed in a drying oven for drying at a drying temperature of 150° C. and a drying time of 7 hours. The dried flake molybdenum oxide is crushed through a drum sieve, and the particle size of the crushed molybdenum oxide is between 0-15mm.

[0036] The granulated molybdenum oxide mixture and 205kg of fine aluminum are added to the coarse aluminum in the mixing cylinder and mixed evenly. Pour the mixed material into a reaction vessel made of alumina.

[0037] 100g of fine aluminum, 50g of magnesium powder and 10g of calcium peroxide are evenly mixed and then placed on the surface of the material in the reaction vessel and ignited to perform the aluminothermic reduction reaction. Af...

Embodiment 2

[0042] Molybdenum oxide granulation steps are as follows:

[0043] Take 180kg molybdenum dioxide, 135kg molybdenum trioxide and 25kg C6H10O5 solution, solution concentration: 2%. The above materials were mixed evenly and added to a tablet press, and then the materials compressed into tablets were placed in a drying oven for drying at a drying temperature of 200° C. and a drying time of 10 hours. The dried flake molybdenum oxide is crushed through a drum sieve, and the particle size of the crushed molybdenum oxide is between 0-15mm.

[0044] The granulated molybdenum oxide mixture and 182kg of fine aluminum are added to the coarse aluminum in the mixing cylinder and mixed evenly. Pour the mixed material into a reaction vessel made of alumina.

[0045] 100g of fine aluminum, 70g of magnesium powder and 20g of calcium peroxide are evenly mixed and then placed on the surface of the material in the reaction vessel and ignited to perform the aluminothermic reduction reaction. Aft...

Embodiment 3

[0050] Molybdenum oxide granulation steps are as follows:

[0051]Take 250kg molybdenum dioxide, 101kg molybdenum trioxide and 35kg C6H10O5 solution, solution concentration: 1%. Mix the above materials evenly and put them into the tablet press machine, and then place the materials compressed into flakes in a drying oven for drying at a drying temperature of 100°C and a drying time of 12 hours. The dried flake molybdenum oxide is crushed through a drum sieve, and the particle size of the crushed molybdenum oxide is between 0-15mm.

[0052] The granulated molybdenum oxide mixture and 158kg of fine aluminum are added to the coarse aluminum in the mixing cylinder and mixed evenly. Pour the mixed material into a reaction vessel made of alumina.

[0053] 100g of fine aluminum, 50g of magnesium powder and 30g of calcium peroxide are evenly mixed and then placed on the surface of the material in the reaction vessel and ignited to perform the aluminothermic reduction reaction. After...

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Abstract

The invention relates to an intermediate alloy for a titanium alloy and a production method thereof and specifically relates to a molybdenum-aluminum intermediate alloy and a production method thereof, belonging to the field of metallurgy. The alloy comprises the following components: 60-90% of Mo, not more than 0.1% of Fe, not more than 0.1% of O, not more than 0.1% of Si, not more than 0.05% of C, not more than 0.03% of N, not more than 0.01% of H and the balance of Al, wherein the percentage is the percentage by weight. The invention provides a process for granulating molybdenum oxide and an ATR (aluminothermic reduction) reaction process of the molybdenum-aluminum alloy, and the particle size of the molybdenum oxide after granulation is 0-15mm, so that the phenomenon of violent reaction during the ATR process because the molybdenum oxide particles are too fine can be solved, the safety in production is ensured, and the yield of the alloy can be improved.

Description

technical field [0001] The invention relates to a master alloy for titanium alloy and a production method thereof, in particular to a molybdenum-aluminum master alloy and a production method thereof, belonging to the field of metallurgy. Background technique [0002] The production of titanium alloys requires the use of a large number of intermediate alloys to add many alloying elements with large melting points, such as V, Al, Mo, Cr, Sn, Nb, Fe, Zr, Mn, Cu, etc. Among them, the melting point of Mo is 2617°C, the melting point of titanium is 1660°C, and the melting point of MoAl (Mo: 65%-85%) alloy is between 1570°C and 1730°C. If Mo is directly added, it will lead to the loss of some alloy elements, which will further lead to the deviation of alloy composition. The addition of intermediate alloys can better control the proportion of these elements in the final alloy, improve alloying conditions, improve the uniformity of alloy composition, overcome segregation, and remov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04C22C1/00
Inventor 刘志光赵超陈小曼孙诗淋方敏
Owner BHN SPECIAL MATERIALS
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