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A high melting point difference alloy and its solid-liquid mixed molding preparation method

A technology of solid-liquid mixing and high melting point, which is applied in the field of preparation of alloys with high melting point difference, can solve the problems of easy microcracks in the solidification process, difficult to be effectively controlled, and high oxygen content in the alloy, so as to eliminate pores and defects and have good integrity , good composition uniformity

Active Publication Date: 2022-03-04
CHANGSHA HUAISHI NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the alloy prepared by the conventional ingot metallurgy method is prone to defects such as segregation, and due to the large difference in the phase physical properties of the melting point difference, the solidification process is prone to micro-cracks or porous phenomena; the powder metallurgy method can be used to prepare the alloy. High melting point difference alloy with relatively high density, but the preparation cycle is long, and because the powder is easy to absorb oxygen during the preparation process, the oxygen content of the alloy is relatively high, which is difficult to be effectively controlled

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of preparation process of Al-30Ti alloy target material is as follows:

[0038] According to the Al-Ti binary phase diagram, the melting point of Al-30Ti alloy is about 660℃, the melting point of high-melting titanium is about 1670℃, and the liquidus temperature of Al-30Ti alloy is 1360℃.

[0039] (1) The batching raw materials are high-purity aluminum and high-purity titanium, the mass percentage of Ti is 30%, the balance is aluminum, and its purity is ≥99.995%. Reactivate and rinse with alcohol and allow to dry.

[0040] (2) Blank making Put the prepared material into the crucible, raise the temperature to 1500°C to fully melt the metal aluminum and metal titanium, and then keep it warm for 30 minutes, using electromagnetic stirring and fully stirring; then cool down at 10°C / min to 1330°C , at this temperature, the obtained melt is in a solid-liquid mixed state, in which the proportion of the liquid phase is 75%, and it is stirred evenly for 4 minutes; ℃ / min,...

Embodiment 2

[0046] The preparation process of a kind of Al-30Sc alloy target material is as follows:

[0047] According to the Al-Sc binary phase diagram, the melting point of aluminum in Al-30Sc alloy is 660°C, the melting point of high melting point metal scandium is 1541°C, and the liquidus line of Al-30Sc alloy is 1300°C.

[0048] (1) The raw materials for ingredients are high-purity aluminum and high-purity scandium, the mass ratio of aluminum to scandium is 70:30, and its purity is ≥99.9998%. When the surface is subjected to oxygen and impurity removal treatment, the surface is activated with 5% NaOH activation solution And rinse with alcohol and dry.

[0049] (2) Blank making Put the prepared material into the crucible, raise the temperature to 1460°C to fully melt the metal aluminum and metal scandium, and then keep it warm for more than 20 minutes, using electromagnetic stirring and fully stirring; then cool down to 10°C / min. 1260°C, so that the obtained melt is in a solid-liqui...

Embodiment 3

[0055] The preparation process of a kind of Al-30Ti-2Sc alloy target material is as follows:

[0056] According to the Al-Sc-Ti ternary phase diagram, the melting point of the low melting point metal aluminum in the alloy is 660°C, the melting point of the high melting point metal titanium is 1670°C, and the liquidus temperature of the Al-30Ti-2Sc alloy is 1350°C;

[0057] (1) The batching raw materials are high-purity aluminum, high-purity titanium and high-purity scandium. The mass ratio of aluminum, titanium and scandium is 68:30:2, and its purity is ≥99.9998%. %NaOH activation solution and 3% oxalic acid activation solution were alternately used for surface activation treatment, and then cleaned with alcohol and dried.

[0058] (2) Blank making Put the prepared material into the crucible, heat it up to 1460°C and fully melt it, then keep it warm for 20 minutes, use electromagnetic stirring and stir it fully; then cool down to 1340°C at 10°C / min to make the obtained melt I...

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Abstract

The invention discloses a high melting point difference alloy and a preparation method thereof by solid-liquid mixing. The preparation method is to prepare a metal block A and a metal block B, place them in a crucible, and raise the temperature so that the A metal block and the B metal block are completely melted Finally, keep the temperature for more than 20min, then lower the temperature until the obtained melt is in a solid-liquid mixed state, and the proportion of the liquid phase composition in the melt is 40% to 90%, then pour the melt into a mold, and cool down to B metal Perform uniform temperature treatment below the melting point, then cool to room temperature to obtain a green body, and the green body is post-treated to obtain a high melting point difference alloy; the A is selected from at least one of titanium, copper, iron, nickel, chromium and 17 rare earth elements species; said B is selected from one of aluminum, magnesium and zinc, and the prepared high melting point difference alloy has an oxygen content of less than 0.1%, the sum of other impurity contents is less than 0.1%, and the relative density is greater than 98% , the average grain size is less than 100 μm, and the composition uniformity of metal A in the high melting point difference alloy is less than ±5%.

Description

technical field [0001] The invention relates to the technical field of preparation of high melting point difference alloys, in particular to a high melting point difference alloy and a solid-liquid mixed molding preparation method thereof. Background technique [0002] Alloys with high melting point difference are generally prepared by ingot metallurgy or powder metallurgy. Among them, the alloy prepared by the conventional ingot metallurgy method is prone to defects such as segregation, and due to the large difference in the phase physical properties of the melting point difference, the solidification process is prone to micro-cracks or porous phenomena; the powder metallurgy method can be used to prepare the alloy. High melting point difference alloy with relatively high density, but the preparation cycle is long, and because the powder is easy to absorb oxygen during the preparation process, the oxygen content of the alloy is relatively high, which is difficult to be effe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02B22D21/02B22D21/04B22D27/04C21D1/26C22C18/00C22C21/00C22C23/00C22F1/04C22F1/06C22F1/16
CPCC22C1/02B22D27/04C21D1/26B22D21/027B22D21/04C22C1/026C22C21/00C22C21/003C22F1/04C22C18/00C22F1/165C22C23/00C22F1/06
Inventor 邱从章
Owner CHANGSHA HUAISHI NEW MATERIAL TECH CO LTD
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