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A composite high-strength and toughness molybdenum alloy and its preparation method

A tough molybdenum and alloy technology, applied in the field of composite 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 good comprehensive performance

Active Publication Date: 2019-07-05
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 composite 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 composite high-strength and toughness molybdenum alloy and its preparation method
  • A composite high-strength and toughness molybdenum alloy and its preparation method
  • A composite high-strength and toughness molybdenum alloy and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] This example provides a composite 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 carbon powder, 0.4 g of boron powder, and 0.4 g of aluminum hydride. The powder is 0.4g, and the molybdenum powder is 1000g.

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

[0031] Step 1, one-time mixing: according to the proportion of the formula, the titanium hydride, zirconium hydride and composite reducing powder are mixed for 1 hour using a three-dimensional mixer;

[0032] Step 2, secondary mixing: uniformly mix titanium hydride, zirconium hydride and composite reduction powder with molybdenum powder again for 2-4 hours;

[0033] Step 3, ball milling: put the powder after the secondary mixing into a ball mill tank, fill it with argon, and ball mill for 2h in a low-energy b...

Embodiment 2

[0058] This example provides a composite 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 carbon powder, 0.2 g of boron powder, The powder is 0.2g, and the molybdenum powder is 1000g.

[0059] The preparation method of the composite high-strength and tough molybdenum alloy in this example is basically the same as that in Example 1.

[0060] The tensile curve of the composite high-strength and tough molybdenum alloy in this embodiment is the same as figure 1 Basically the same, the SEM photo of the composite high-strength and tough molybdenum alloy in this example is the same as figure 2 basically the same.

[0061] The room temperature tensile strength of the composite high-strength and tough molybdenum alloy prepared in this example is 1218 MPa, and the elongation is 8.3%.

Embodiment 3

[0063] This example provides a composite 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 carbon powder, 0.4 g of boron powder, and 2.0 g of aluminum hydride. The powder is 0.4g, and the molybdenum powder is 1000g.

[0064] The preparation method of the composite high-strength and tough molybdenum alloy in this example is basically the same as that in Example 1.

[0065] The tensile curve of the composite high-strength and tough molybdenum alloy in this embodiment is the same as figure 1 Basically the same, the SEM photo of the high-strength and tough molybdenum alloy in this example is the same as figure 2 basically the same.

[0066] The room temperature tensile strength of the composite high-strength and tough molybdenum alloy prepared in this example is 1220 MPa, and the elongation is 8.2%.

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Abstract

The invention provides a composite high-strength and tough molybdenum alloy and its preparation method. It is made of the following raw materials in parts by weight: 5-20 parts of titanium hydride, 0-2 parts of zirconium hydride, and 0.6-1.2 parts of composite reducing powder. parts, molybdenum powder is 1000 parts; the composite reduction powder is a mixed powder composed of carbon powder, boron powder and aluminum powder according to the mass ratio of 1:1:1. 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, C, B, and Al elements with stronger reducibility are used as composite reducing agents to act synergistically. On the one hand, they can be combined with oxygen, which can reduce the segregation of C elements inside the matrix and the influence of forming a coarse second phase with the matrix. On the other hand, it 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 composite high-strength and tough molybdenum alloy and a preparation method. Background technique [0002] Molybdenum has the advantages of high high temperature strength, high melting point, good thermal conductivity and good corrosion resistance, which makes it widely used in electronic glass sealing materials, nuclear power nuclear fuel cladding materials, heating components for heating elements, rotating anodes for medical equipment, and aerospace masks. Leather materials, engine nozzles and other important parts. However, molybdenum severely limits the use of molybdenum alloys due to its low temperature brittleness. The main reasons for affecting low temperature brittleness are the segregation of oxygen and nitrogen elements and high porosity. Therefore, the development of new molybdenum alloys enhanced by oxygen and nitrogen elements and...

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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