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Molybdenum alloy with high strength and ductility and preparation method thereof

A tough molybdenum and alloy technology, applied in the field of high-strength tough molybdenum alloy and its preparation, molybdenum alloy, can solve the problems of insufficient comprehensive performance and single performance of molybdenum alloy, and achieve the effect of good comprehensive performance

Active Publication Date: 2018-11-23
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a high-strength and tough molybdenum alloy and its preparation method to solve the technical problems of single performance and insufficient comprehensive performance of the molybdenum alloy in the prior art

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  • Molybdenum alloy with high strength and ductility and preparation method thereof
  • Molybdenum alloy with high strength and ductility and preparation method thereof

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Embodiment 1

[0029] This embodiment provides a high-strength and tough molybdenum alloy, which is made of the following raw materials in parts by weight: 5.0 g of titanium hydride, 0.8 g of zirconium hydride, 0.4 g of magnesium powder, and 1000 g of molybdenum powder.

[0030] The preparation method of the high strength and toughness molybdenum alloy of the present embodiment comprises the following steps:

[0031] Step 1, one-time mixing: mix the titanium hydride, zirconium hydride and magnesium powder with a three-dimensional mixer for 1 hour according to the formula ratio;

[0032] Step 2, secondary mixing: mix the titanium hydride, zirconium hydride, magnesium powder and molybdenum powder evenly for another 2-4 hours;

[0033] Step 3, ball milling: put the powder after secondary mixing into a ball mill tank, fill it with argon, and mill it in a low-energy ball mill with a rotation speed not higher than 200r / min for 2 hours;

[0034] Step 4, pressing: the powder after ball milling is f...

Embodiment 2

[0058] This embodiment provides a high-strength and tough molybdenum alloy, which is made of the following raw materials in parts by weight: 10.0 g of titanium hydride, 1.0 g of zirconium hydride, 0.2 g of magnesium powder, and 1000 g of molybdenum powder.

[0059] The preparation method of the high-strength and toughness molybdenum alloy of this embodiment is basically the same as that of Embodiment 1.

[0060] The high-strength toughness molybdenum alloy tensile curve of the present embodiment and figure 1 Basically the same, the SEM photo of the high-strength and toughness molybdenum alloy of the present embodiment is the same as figure 2 basically the same.

[0061] The room temperature tensile strength of the high-strength and tough molybdenum alloy prepared in this embodiment is 1223 MPa, and the elongation is 8.2%.

Embodiment 3

[0063] This embodiment provides a high-strength and tough molybdenum alloy, which is made of the following raw materials in parts by weight: 20.0 g of titanium hydride, 2.0 g of zirconium hydride, 0.4 g of magnesium powder, and 1000 g of molybdenum powder.

[0064] The preparation method of the high-strength and toughness molybdenum alloy of this embodiment is basically the same as that of Embodiment 1.

[0065] The high-strength toughness molybdenum alloy tensile curve of the present embodiment and figure 1 Basically the same, the SEM photo of the high-strength and toughness molybdenum alloy of the present embodiment is the same as figure 2 basically the same.

[0066] The room temperature tensile strength of the high-strength and tough molybdenum alloy prepared in this embodiment is 1226 MPa, and the elongation is 8.1%.

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Abstract

The invention provides a molybdenum alloy with the high strength and ductility. The molybdenum alloy is prepared through following raw materials of, by weight, 5-20 parts of titanium hydride, 0.8-2 parts of zirconium hydride, 0.2-0.4 part of magnesium powder, and 1000 parts of molybdenum powder; or 5-20 parts of titanium hydride, 0.8-2 parts of hafnium hydride, 0.2-0.4 part of magnesium powder, and 1000 parts of molybdenum powder. The molybdenum alloy with the high strength and ductility is good in comprehensive performance, the tensile strength at the room temperature is greater than 1200 MPa, and the elongation is greater than 8.0%. According to the molybdenum alloy with the high strength and ductility, the Mg element with higher reducibility serves as a reducing agent, on the one hand,the Mg element can be combined with oxygen, the content of harmful element oxygen in a molybdenum system is effectively decreased, and the influence of holes generated by gas generated by C element reduction, segregation of the C element inside a matrix, and a thick and large second phase generated by the C element and the matrix are reduced; on the other hand, the Mg element and the oxygen element can form a magnesium oxide reinforced phase with the high-temperature stability; and the magnesium oxide phase of a tetragonal structure is similar to a molybdenum matrix structure of a body-centered cubic, the magnesium oxide phase and the matrix can form a coherent or a semi-coherent crystalline relationship, and the strengthening and toughening effects are significant.

Description

technical field [0001] The invention belongs to the field of powder metallurgy and relates to a molybdenum alloy, in particular to a high-strength and toughness molybdenum alloy and a preparation method. Background technique [0002] Molybdenum has the advantages of high temperature strength, high melting point, good thermal and electrical conductivity, and good corrosion resistance, so it is widely used in electronic glass sealing materials, nuclear power nuclear fuel cladding materials, heating element heating components, medical equipment rotating anodes, aerospace Mongolia Leather materials, engine nozzles and other important parts. However, molybdenum's low-temperature brittleness severely limits the use of molybdenum alloys, and the main reason affecting low-temperature brittleness is the segregation of oxygen and nitrogen elements and high porosity. Therefore, the development of new molybdenum alloys strengthened by oxygen and nitrogen elements and low porosity is th...

Claims

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Application Information

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IPC IPC(8): C22C27/04C22C32/00C22C1/05B22F1/00B22F3/18B22F9/04
CPCB22F1/0003B22F3/18B22F9/04B22F2003/185B22F2009/043B22F2998/10B22F2999/00C22C1/058C22C27/04C22C32/0005B22F3/04B22F3/1007B22F2201/11
Inventor 王快社胡卜亮胡平邓洁周宇航李世磊陈文静夏雨
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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