Alloy refining agent and preparation method thereof

A refiner and alloy technology, which is applied in the field of alloy refiner and its preparation to achieve the effect of inhibiting more and more coarsening

Inactive Publication Date: 2015-05-13
周凡
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the content of Si in aluminum exceeds 3%, the grains become coarser as the content increases, and its coarsening effect inhibits the refinement of the master alloy. Si and Ti will form some stable compounds in the melt and coat On t

Method used

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  • Alloy refining agent and preparation method thereof

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preparation example Construction

[0021] Such as figure 1 As shown, for the above-mentioned alloy refiner for the refinement of aluminum-titanium-boron or aluminum-titanium-carbon master alloy, the present invention provides a preparation method of the alloy refiner, which comprises the following steps:

[0022] S1. In terms of weight percentage, according to 80% to 95% of aluminum titanium boron or aluminum titanium carbon master alloy: 0.1% to 10% of lanthanum cerium rare earth metal, 1% to 30% of phosphorus metal, and added to aluminum titanium boron Or Al-Ti-C master alloy to form a mixture; wherein, Al-Ti-B or Al-Ti-C master alloy includes: titanium 1-5.5%, boron 0.1-1%, carbon 0.2-1%; lanthanum-cerium rare earth metal includes: lanthanum 23 ~39%, cerium 45~55%, neodymium 8~20%;

[0023] S2. After raising the temperature of the furnace to 720-900°C, add the mixture into the aluminum-titanium-boron or aluminum-titanium-carbon master alloy melting furnace, and after stirring, stand still for 10-30 minutes ...

Embodiment 1

[0030] In terms of weight percentage, it is provided as 80% aluminum titanium boron or aluminum titanium carbon master alloy, 0.1% lanthanum cerium rare earth metal, and 1% phosphorus metal. And add it to aluminum titanium boron or aluminum titanium carbon master alloy to form a mixture. Among them, lanthanum and cerium rare earth metals include: 23% lanthanum, 45% cerium, and 8% neodymium.

[0031] After heating the furnace to 900°C, add the mixture into the aluminum-titanium-boron or aluminum-titanium-carbon master alloy melting furnace, stir it, let it stand for 10-30 minutes for slag removal, and directly cast it into an ingot or prepare it into a wire rod.

Embodiment 2

[0033] In terms of weight percentage, it is provided as 95% aluminum titanium boron or aluminum titanium carbon master alloy, 10% lanthanum cerium rare earth metal, and 30% phosphorus metal. And add it to aluminum titanium boron or aluminum titanium carbon master alloy to form a mixture. Among them, lanthanum and cerium rare earth metals include: 39% lanthanum, 55% cerium, and 20% neodymium.

[0034] After heating the furnace to 720°C, add the mixture into the aluminum-titanium-boron or aluminum-titanium-carbon master alloy melting furnace, stir it, let it stand for 10-30 minutes to remove slag, and directly cast it into an ingot or prepare it into a wire rod.

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Abstract

The invention discloses an alloy refining agent and a preparation method thereof, wherein the alloy refining agent comprises, by weight percentage, 0.1-10% of lanthanum and cerium rare earth metals and 1-30% phosphor metal. According to the invention, a refining property of intermediate alloy of Al-Ti-C and Al-Ti-B and a mechanical property of aluminium-silicon alloy are improved, for silicon and titanium in a melt will form some stable compounds, which can refine the intermediate alloy, inhibit further coarsening of crystal grains, and solve phenomenon of Si poison, so that structural form of silicon phase is well controlled.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to an alloy refiner and a preparation method thereof. Background technique [0002] The primary silicon precipitated during the crystallization process of the hypereutectic Al-Si alloy presents a sharp-edged plate-like structure, and the eutectic silicon also presents a thick needle shape, which restricts its performance. If we can try to control the grain structure of the alloy and the structure and shape of the silicon phase, its mechanical properties can be effectively improved. [0003] At present, Al-Ti-C and Al-Ti-B alloys have no obvious refinement of pure Al. When the content of Si in aluminum exceeds 3%, the grains become coarser as the content increases, and its coarsening effect inhibits the refinement of the master alloy. Si and Ti will form some stable compounds in the melt and coat On the surface of TiC and TiB particles, causing them to lose the role of h...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C21/00
Inventor 周凡
Owner 周凡
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