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Preparation method of high-plasticity Ni-Mn-In alloy

A ni-mn-in, high plasticity technology, applied in the field of alloy preparation, can solve the problems such as high brittleness of Ni-Mn-In alloy system, achieve the effect of improving compression fracture strength and fracture strain, improving plasticity, and improving plasticity

Inactive Publication Date: 2013-08-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention solves the problem of high brittleness in the Ni-Mn-In alloy system, and provides a method for preparing a highly plastic Ni-Mn-In alloy

Method used

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  • Preparation method of high-plasticity Ni-Mn-In alloy
  • Preparation method of high-plasticity Ni-Mn-In alloy
  • Preparation method of high-plasticity Ni-Mn-In alloy

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specific Embodiment approach 1

[0022] Specific embodiment one: the preparation method of a kind of high plasticity Ni-Mn-In alloy of this embodiment is specifically prepared according to the following steps:

[0023] 1. Weigh nickel, manganese, indium and cobalt according to the atomic percentage of nickel, manganese, indium and cobalt as 50:34:(16-y):y, wherein y=2, 3, 4, 5 or 8;

[0024] 2. Put the nickel, manganese, indium and cobalt weighed in step 1 into a non-consumable vacuum arc melting furnace, and evacuate to 1×10 -3 ~4×10 -2 Pa, under the protection of argon, control the smelting current to 250-500 amperes, turn over and smelt 4-10 times, and magnetically stir at the same time, and then use a suction casting device to make rod-shaped materials with a size of Φ6mm×70mm~Φ10mm×70mm;

[0025] 3. Mechanically polish the rod-shaped material obtained in step 2, then cut it, then clean it with acetone, and then seal it in a vacuum of 1×10 -3 Pa~5×10 -2 In the Pa quartz tube, under the condition of tem...

specific Embodiment approach 2

[0026] Embodiment 2: This embodiment differs from Embodiment 1 in that the purity of nickel, manganese, indium and cobalt in step 1 is 99.95%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0027] Specific embodiment three: the difference between this embodiment and specific embodiment one is: in step two, vacuumize to 2×10 -3 ~3×10 -2 Pa. Others are the same as in the first embodiment.

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Abstract

The invention discloses a preparation method of a high-plasticity Ni-Mn-In alloy, and relates to the preparation method of the alloy. The preparation method aims at solving the problem that the Ni-Mn-In alloy series is brittle. The method comprises the following steps of: firstly, weighting; secondly, smelting; and thirdly, preparing the high plasticity Ni-Mn-In alloy. Since the Co element is added, the compression fracture strength and fracture strain of the Ni-Mn-In alloy can be obviously improved, and the method is used for preparing the high-plasticity Ni-Mn-In alloy.

Description

technical field [0001] The present invention relates to a method for preparing an alloy. Background technique [0002] Magnetically actuated shape memory alloys are a new class of shape memory materials, which not only have the shape memory effect of traditional shape memory alloys controlled by the temperature field, but also produce large strains under the action of a magnetic field. The discovered magnetic drive memory alloys mainly include Ni-Mn-Ga(Al), Ni-Fe-Ga, Co-Ni-Ga(Al) and new Ni-Mn-In(Sn, Sb) alloys. Among them, the Ni-Mn-Ga alloy system is the earliest and most extensively studied magnetically driven shape memory alloy. Anisotropy and low critical stress for twin boundary migration are the keys to obtain large magnetically induced strain in this alloy. At present, in Ni-Mn-Ga series alloys, the maximum reversible strain of a single crystal has reached 10%, and the response frequency has reached the order of kHz. However, the macroscopic output stress generated...

Claims

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Application Information

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IPC IPC(8): C22C19/03C22C1/02
Inventor 隋解和张欣丰焱蔡伟
Owner HARBIN INST OF TECH
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