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Rare earth-aluminum-titanium-boron alloy and preparation method thereof

A rare earth aluminum, titanium boron technology, applied in the application field of aluminum alloy, can solve the problems of loss of refining ability, easy aggregation of particles, poisoning reaction, etc. Effect

Inactive Publication Date: 2018-06-08
BAOTOU RES INST OF RARE EARTHS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the most commonly used grain refiner is Al-Ti-B alloy, which has some problems: TiB 2 Particles are easy to aggregate, precipitate and lose the ability to refine; B is prone to poisoning reactions with Cr and Zr, and loses the ability to refine; TiB in commonly used refiners 2 Particles, TiAl 3 phase, less than 1% can become effective heterogeneous nucleation cores, and the refinement ability needs to be improved

Method used

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preparation example Construction

[0023] The preparation method of rare earth aluminum titanium boron alloy specifically comprises the following steps:

[0024] Step 1: Weighing raw materials, raw materials include: titanium powder or aluminum-titanium master alloy, boron powder or aluminum-boron master alloy, rare earth metal or rare earth aluminum master alloy, aluminum ingot, non-rare earth raw materials;

[0025] Non-rare earth raw materials include: metal strontium, aluminum-strontium master alloy, metal copper, aluminum-copper master alloy, metal iron, aluminum-iron master alloy, magnesium ingot, aluminum-magnesium master alloy, silicon, aluminum-silicon master alloy, metal zinc, aluminum-zinc master alloy alloy. It is also possible not to add non-rare earth raw materials.

[0026] Step 2: After heating up and melting the aluminum ingot, adding raw materials for reaction;

[0027] After heating and melting, the melt temperature is controlled at 1000-1500°C.

[0028] Induction furnace, resistance furna...

Embodiment 1

[0037] (1) Weigh titanium powder, boron powder, metal lanthanum, industrial pure aluminum as required;

[0038] (2) After heating and melting industrial pure aluminum in the induction furnace, various raw materials are added for reaction, and the temperature of the melt is controlled at 1500°C after heating and melting;

[0039] (3) Refining after stirring until the melt reaction is complete, the stirring time is 10min, nitrogen gas is used for refining, and the refining time is 5min;

[0040] (4) Remove slag after heat preservation, cast into rods to obtain rare earth aluminum titanium boron alloy; extrude into wires after forming rods, the heat preservation temperature is 1500 ℃, and the heat preservation time is 60 minutes.

[0041] The composition of the rare-earth aluminum-titanium-boron alloy is (by weight percentage): 3.0% titanium, 3.0% boron, 3.0% La, and the balance is aluminum.

Embodiment 2

[0043] (1) Weigh titanium powder, aluminum-boron master alloy, metal cerium, metal neodymium, and industrial pure aluminum as required;

[0044] (2) After heating up and melting industrial pure aluminum in the resistance furnace, various raw materials are added for reaction, and the temperature of the melt is controlled at 1400°C after heating up and melting;

[0045] (3) Refining after stirring until the melt reaction is complete, the stirring time is 30min, the refining adopts argon, and the refining time is 15min;

[0046] (4) Remove slag after heat preservation, and cast into an ingot to obtain a rare earth aluminum titanium boron alloy. The heat preservation temperature is 1400° C. and the heat preservation time is 50 minutes.

[0047] The composition of the rare-earth aluminum-titanium-boron alloy is (by weight percentage): 4.0% titanium, 2.5% boron, 1.0% cerium, 1.0% neodymium, and the balance is aluminum.

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Abstract

The invention discloses a preparation method of rare earth-aluminum-titanium-boron alloy. The preparation method comprises the following steps: weighing titanium powder or aluminum-titanium intermediate alloy, boron powder or aluminum-boron intermediate alloy, rare earth metals or rare earth-aluminum intermediate alloy, and aluminum ingot; heating for melting the aluminum ingot, then adding the raw materials for carrying out a reaction, stirring until melt reacts completely, and then refining; carrying out heat preservation and then drossing so as to obtain the rare earth-aluminum-titanium-boron alloy. The rare earth-aluminum-titanium-boron alloy is prepared from the following components by weight percent: 1.0-10.0% of titanium, 0.5-5.0% of boron, 0.1-3.0% of rare earth and the balance ofaluminum. The invention also discloses the rare earth-aluminum-titanium-boron alloy. The preparation method improves the size, morphology and distribution of a TiAl3 phase and TiB2 particles in a refiner, and solves the problem that the TiB2 particles are easy to aggregate.

Description

technical field [0001] The invention relates to an aluminum alloy application technology, in particular to a rare-earth aluminum-titanium-boron alloy and a preparation method thereof. Background technique [0002] With the application of aluminum in the high-tech field, subsequent processing puts forward strict requirements on the structure and properties of aluminum, and the optimal structure of aluminum requires that the ingot has fine and uniform equiaxed grains. Grain size and shape are the most important characteristics of the as-cast structure of aluminum and its alloys. The as-cast structure composed of fine and uniform equiaxed grains is isotropic as a whole, has excellent comprehensive mechanical properties of high strength, high plasticity and toughness, and is conducive to The performance of the subsequent deformation processing process is improved. [0003] Grain refinement methods are divided into two categories: physical methods and chemical methods. Physical...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C21/00C22C32/00
CPCC22C1/1036C22C21/00C22C32/0073C22C1/1052
Inventor 吴俊子贾锦玉胡文鑫王小青姜佳鑫杨正华王玮
Owner BAOTOU RES INST OF RARE EARTHS
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