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Preparation method of fine-grain cualmn shape memory alloy

A memory alloy and fine-grained technology, which is applied in the field of preparation of fine-grained CuAlMn shape memory alloys, can solve the problems of insufficient copper-based shape memory alloys and the inability to meet the requirements of high speed, high efficiency, intelligence and automation.

Inactive Publication Date: 2019-05-14
HEBEI UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the preparation method of fine-grained CuAlMn shape memory alloy, specifically, by designing a new Al-based LaScB inoculant, using its inoculation and refinement effect, to prepare a At the same time, the preparation method of the fine-grained CuAlMn shape memory alloy that significantly improves its mechanical properties overcomes the insufficient effect of the existing technology on the grain refinement of copper-based shape memory alloys, and cannot meet the needs of today's development of mechanical equipment that tends to be high-speed, efficient, and efficient. The pitfalls of intelligence and automation requirements

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  • Preparation method of fine-grain cualmn shape memory alloy
  • Preparation method of fine-grain cualmn shape memory alloy
  • Preparation method of fine-grain cualmn shape memory alloy

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Experimental program
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Effect test

Embodiment 1

[0034] The first step is to prepare Al-based LaScB inoculant strips:

[0035] According to the ratio of Al: 93.40%, La: 3.57%, Sc: 1.43%, B: 1.60%, weigh the raw material Al-20%La, Al-3%B, Al-5%Sc master alloy and crush it , ultrasonic cleaning, drying treatment, and then put all the weighed raw materials into the WK-Ⅱ non-consumable vacuum electric arc furnace, and wait to be vacuumed to 5×10 -3 Start arcing and smelting after Pa, stop smelting after the intermediate alloy of the raw material is completely melted, and then reverse it after the obtained molten alloy is solidified, and re-melt it, repeating this 3 times to obtain a block Al-based LaScB inoculant Put the block inoculant into the water-cooled copper crucible of the LZK-#12A vacuum quenching furnace, and wait to be vacuumed to 5×10 -3 After Pa, the high-purity argon gas protection is introduced, and the block inoculant in the water-cooled copper crucible is completely melted by the flame of the moving pole, and t...

Embodiment 2

[0040] This embodiment is a comparative example.

[0041] The first step is to prepare Al-based LaScB inoculant strips:

[0042] With embodiment 1;

[0043] The second step is to prepare unrefined CuAlMn shape memory alloy:

[0044] According to the CuAlMn shape memory alloy, Al accounts for 11.9% of the total mass of CuAlMn, Mn accounts for 2.5% of the total mass of CuAlMn, and the rest is the composition of Cu matrix. Weigh the required amount of raw materials pure Cu, pure Al and pure Mn, and then respectively Take by weighing 1.0% of the total mass of the above-mentioned CuAlMn shape memory alloy composed of 8%Na 3 AlF 6 +8%KCl+84%NaCl refining agent, charcoal powder accounting for 0.2% of the total mass of the above-mentioned CuAlMn shape memory alloy, after that, pure Cu is placed in a graphite crucible in an intermediate frequency induction heating furnace, and the temperature is raised until Cu is melted Finally, add charcoal powder to cover the Cu solution, then a...

Embodiment 3

[0047] The first step is to prepare Al-based LaScB inoculant strips:

[0048] According to the ratio of Al: 93.40%, La: 3.57%, Sc: 1.43%, B: 1.60%, weigh the raw material Al-20%La, Al-3%B, Al-5%Sc master alloy and crush it , ultrasonic cleaning, drying treatment, and then put all the weighed raw materials into the WK-Ⅱ non-consumable vacuum electric arc furnace, and wait to be vacuumed to 5×10 -3 Start arcing and smelting after Pa, stop smelting after the intermediate alloy of the raw material is completely melted, and then reverse it after the obtained molten alloy is solidified, and re-melt it, repeating this 3 times to obtain a block Al-based LaScB inoculant Put the block inoculant into the water-cooled copper crucible of the LZK-#12A vacuum quenching furnace, and wait to be vacuumed to 5×10 -3 After Pa, the high-purity argon gas protection is introduced, and the block inoculant in the water-cooled copper crucible is completely melted by the flame of the moving pole, and t...

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Abstract

The invention discloses a preparing method for a fine grain CuAlMn shape memory alloy and relates to a physical structure changing a copper-base alloy. The preparing method comprises the steps: preparing an Al-based LaScB nucleating agent thin strip; and preparing the fine grain CuAlMn shape memory alloy. By designing the new Al-based LaScB nucleating agent and using its nucleating and refining actions, the fine grain CuAlMn shape memory alloy of which the mechanical property is obviously improved while the high damping characteristic is kept is prepared, and the defects that the grain refining effect of the copper-base shape memory alloy in the prior art is insufficient, and the development trend of the current mechanical equipment to the requirements of high speed, efficiency, intelligentization and automation cannot be met are overcome.

Description

technical field [0001] The technical solution of the invention relates to changing the physical structure of the copper-based alloy, in particular to the preparation method of the fine-grained CuAlMn shape memory alloy. Background technique [0002] With the rapid development of modern science and technology, mechanical equipment tends to be high-speed, efficient, intelligent and automated, and the problems of vibration, noise and fatigue fracture caused by it are becoming more and more prominent. Copper-based shape memory alloys are a very important class of high damping materials. Due to their excellent shape memory effect, pseudoelasticity, wide applicable temperature range, good processability and low price, this type of alloy has been widely used in recent years. It has been widely used in the field of mechanical equipment, and its market potential is huge. However, such alloys still have defects such as easy intergranular fracture and poor mechanical properties due to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/01C22C1/03C22C1/06C22F1/08
CPCC22C1/03C22C1/06C22C9/01C22F1/002C22F1/08
Inventor 王清周刘晓静姬向薇殷福星崔春翔郑楠李汉祖
Owner HEBEI UNIV OF TECH
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