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High-strength-plasticity-toughness multi-main-element alloy and preparation method thereof

A technology of multi-principal alloy and ductility, which is applied in the field of high-strength plastic-toughness multi-principal alloy and its preparation, can solve the problems that no scholars have researched cost multi-principal alloy, so as to promote the formation of BCC phase and alloy Effects of increased hardness and improved wear resistance

Active Publication Date: 2019-11-19
SHENYANG POLYTECHNIC UNIV
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  • Application Information

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Problems solved by technology

In order to promote the formation of the BCC system, these scholars have studied the effects of metal addition phases and non-metal additions on the performance and structure of multi-principal alloys, but no scholars have yet developed low-cost, high-strength, ductile-toughness multi-principal alloys.

Method used

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  • High-strength-plasticity-toughness multi-main-element alloy and preparation method thereof
  • High-strength-plasticity-toughness multi-main-element alloy and preparation method thereof
  • High-strength-plasticity-toughness multi-main-element alloy and preparation method thereof

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Embodiment

[0026] 1) Use an electronic balance to accurately weigh the smelting raw materials, and separate the Al, Cr, Fe, Ni, and TiN single mass blocks with a purity higher than 99.9% according to the mole fraction of Al 0.5 Cr 0.9 FeNi 2.5 TiN x (x=0.0,0.2,0.4,0.6,0.8,1.0) is prepared;

[0027] 2) Vacuum arc melting: Vacuum the electric arc furnace to a vacuum degree of (4.5-4.8)×10 -3 Pa, and then under the high-purity argon atmosphere with a purity greater than 99.999%, fill high-purity argon to a vacuum of -0.05Mpa, and conduct arc melting at a current of 150A-300A to prepare Al 0.5 Cr 0.9 FeNi 2.5 TiN x (x=0.0, 0.2, 0.4, 0.6, 0.8, 1.0) alloy ingots, each about 30g. During preparation, the ingot was inverted and remelted at least 5 times to improve chemical uniformity.

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Abstract

The invention relates to the technical field of alloy material preparation, in particular to a high-strength-plasticity-toughness multi-main-element alloy. The alloy has the following structure of Al0.5Cr0.9FeNi25TiNx (x is equal to 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0). The strongest diffraction peak of the alloy is firstly moved leftwards and then is moved rightwards, a lattice constant is firstly increased and then reduced, but the phase structure is kept unchanged, a BCC phase starts to appear in the alloy, and the strip-shaped structure and nano-particles appear inside BCC. After TIN is added,the hardness of the alloy is improved by nearly 3 times, and the wear resistance is improved by nearly 1 time. The compressive strength of the master alloy is 925 MPa, the alloy is not broken, the plastic deformation of the alloy is very large, and after TiN is added, the breaking strength of the alloy is improved to 2006 MPa, and the fracture strain of the alloy is about 18%.

Description

technical field [0001] The invention relates to the technical field of alloy material preparation, in particular to a high-strength plastic-toughness multi-principal alloy and a preparation method thereof. Background technique [0002] With the rapid development of modern heavy industry, materials have increasingly become the primary problem restricting the development of heavy industry. The performance of ordinary alloys can no longer meet the needs of key parts and components. People are eager to find a new type of alloy that meets special requirements. The traditional alloy design concept believes that the more components in the alloy, the easier it is to form complex intermetallic compounds, which increases the difficulty of its analysis. Yeh first proposed the design concept of multi-element alloys in 2004, that is, multi-principal elements will not lead to the formation of brittle phases such as various complex intermetallic compounds in the alloy, on the contrary, it ...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C32/00C22C1/10
CPCC22C1/1036C22C19/058C22C30/00C22C32/0068
Inventor 张楠楠金冰倩马永亮张悦李德元郝德喜郭旭敏
Owner SHENYANG POLYTECHNIC UNIV
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