A kind of high strength and toughness molybdenum alloy and preparation method thereof

A tough molybdenum and alloy technology, applied in the field of high-strength and tough molybdenum alloy and preparation, molybdenum alloy, can solve the problems of single performance and insufficient comprehensive performance of molybdenum alloy, and achieve the effect of reducing porosity, good comprehensive performance and significant strengthening and toughening effect.

Active Publication Date: 2019-07-05
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • 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

Method used

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  • A kind of high strength and toughness molybdenum alloy and preparation method thereof
  • A kind of high strength and toughness molybdenum alloy and preparation method thereof
  • A kind of high strength and toughness molybdenum alloy 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 high-strength and tough molybdenum alloy, which is made of the following raw materials in parts by weight: 5-20 parts of titanium hydride, 0.8-2 parts of zirconium hydride, 0.2-0.4 parts of magnesium powder, and 0.2-0.4 parts of molybdenum powder. 1000 parts; or 5-20 parts of titanium hydride, 0.8-2 parts of hafnium hydride, 0.2-0.4 parts of magnesium powder, and 1000 parts of molybdenum powder. The high-strength and toughness molybdenum alloy of the invention has good comprehensive properties, the tensile strength at room temperature is greater than 1200MPa, and the elongation is greater than 8.0%. In the present invention, the more reducible Mg element is used as a reducing agent, on the one hand, it can be combined with oxygen, effectively reducing the content of harmful element oxygen in the molybdenum system, reducing the pores generated by the reduction of C element, segregation inside the matrix, and the matrix. The effect of forming a coarse second phase, on the other hand, Mg element and oxygen element can form a magnesium oxide strengthening phase with high temperature stability. The tetragonal magnesium oxide phase is similar to the body-centered cubic molybdenum matrix structure, and can form a coherent or semi-coherent crystallographic relationship with the matrix, and has a significant strengthening and toughening effect.

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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Patent Type & Authority Patents(China)
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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