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A kind of wear-resistant molybdenum alloy material and preparation method thereof

A molybdenum alloy and grinding technology, which is applied in the field of grinding-resistant molybdenum alloy materials and its preparation, can solve the problems of low-temperature brittleness, recrystallization brittleness, poor high-temperature oxidation resistance, restrictions on the use of molybdenum and its alloys, and low thermal expansion coefficient. , to achieve the effect of stable product quality, excellent comprehensive performance and good toughness

Active Publication Date: 2017-07-28
JINDUICHENG MOLYBDENUM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Molybdenum is a metal element with a series of advantages such as high melting point and low thermal expansion coefficient. However, molybdenum and molybdenum alloys have the disadvantages of low temperature brittleness, recrystallization brittleness and high temperature oxidation resistance, which limit the use of molybdenum and its alloys in structural materials. usage of
[0004] Alumina has a high melting point, high hardness and excellent chemical stability, and is widely used in the production of various refractory bricks, refractory crucibles, high-temperature test instruments, abrasives, flame retardants, fillers, etc.; but its toughness is poor and cannot Disadvantages such as being subjected to large mechanical shocks also limit its application range
[0005] Using Mo and Al 2 o 3 Each has its own advantages, and can be made to have better overall performance than pure Mo and pure Al 2 o 3 Composite materials, the current research on this composite material has been reported, but the research is not enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The anti-grinding molybdenum alloy material of the present embodiment comprises the composition of following parts by weight: 70 parts of Mo, Al 2 o 3 11 parts, Cr 6 parts, Y 2 o 3 8 parts, Ti 3 parts, Ni 4 parts, Nb 2 parts, Zr 3 parts, C 1 part, Mn 2 parts, B 0.1 part.

[0030] The preparation method of the anti-grinding molybdenum alloy material of the present embodiment comprises the following steps:

[0031] Step 1. Prepare ammonium molybdate solution according to the composition requirements of the molybdenum alloy material to be prepared, then use nitric acid to carry out acid precipitation and crystallization of the ammonium molybdate solution, and then place the solid-liquid mixture containing crystals in a vacuum filtration tank for vacuum filtration , after rinsing with pure water for more than 3 times, place it in a drying oven at 100°C and dry until the water content of the solid matter drops to 0.8g / cm 3 , to obtain ammonium tetramolybdate;

[0032]...

Embodiment 2

[0045] The anti-grinding molybdenum alloy material of the present embodiment comprises the composition of following parts by weight: Mo 72 parts, Al 2 o 3 9 parts, Cr 8 parts, Y 2 o 3 5 parts, 5 parts Ti, 3 parts Ni, 4 parts Nb, 1 part Zr, 2 parts C, 1 part Mn, 0.15 parts B.

[0046] The preparation method of the anti-grinding molybdenum alloy material of the present embodiment comprises the following steps:

[0047] Step 1. Prepare ammonium molybdate solution according to the composition requirements of the molybdenum alloy material to be prepared, then use nitric acid to carry out acid precipitation and crystallization of the ammonium molybdate solution, and then place the solid-liquid mixture containing crystals in a vacuum filtration tank for vacuum filtration After rinsing with pure water for more than 3 times, place it in a drying oven at 110°C and dry until the water content of the solid matter drops to 0.5g / cm 3 , to obtain ammonium tetramolybdate;

[0048] Step...

Embodiment 3

[0054] The anti-grinding molybdenum alloy material of the present embodiment comprises the composition of following parts by weight: Mo 71 parts, Al 2 o 3 10 parts, Cr 7 parts, Y 2 o 3 6 parts, Ti 4 parts, Ni 3.5 parts, Nb 3 parts, Zr 2 parts, C 1.5 parts, Mn 1.5 parts, B 0.12 parts.

[0055] The preparation method of the anti-grinding molybdenum alloy material of the present embodiment comprises the following steps:

[0056] Step 1. Prepare ammonium molybdate solution according to the composition requirements of the molybdenum alloy material to be prepared, then use nitric acid to carry out acid precipitation and crystallization of the ammonium molybdate solution, and then place the solid-liquid mixture containing crystals in a vacuum filtration tank for vacuum filtration , after rinsing with pure water for more than 3 times, place it in a drying oven at 105°C and dry until the water content of the solid matter drops to 0.7g / cm 3 , to obtain ammonium tetramolybdate;

...

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Abstract

The invention provides a grinding resistant molybdenum alloy material. The grinding resistant molybdenum alloy material comprises Mo, Al2O3, Cr, Y2O3, Ti, Ni, Nb, Zr, C, Mn and B in parts by weight. The invention further provides a preparation method of the molybdenum alloy material; and the preparation method comprises the following steps: (1) ammonium tetramolybdate is prepared; (2) Al2O3 / Mo mixed powder is prepared; (3) the Al2O3 / Mo mixed powder, other components and a process control agent are uniformly mixed through ball milling, and are dried to obtain mixed powder; (4) a blank is obtained through cold isostatic pressing; and (5) the molybdenum alloy material is obtained through sintering under hydrogen atmosphere. Al2O3 particles and other alloy elements are uniformly distributed in a molybdenum base composite material through multielement doping and particle reinforcement, so that the molybdenum alloy brittleness is reduced, and the molybdenum base composite material is higher in wear resistance, higher in recrystallization temperature and excellent in comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of rare metal material processing, and in particular relates to a grinding-resistant molybdenum alloy material and a preparation method thereof. Background technique [0002] Metal matrix composites (MMCs) are composite materials that use metal or alloy as the matrix and fibers, whiskers, particles, etc. as reinforcements. MMCs has been in the market for more than 40 years. It has excellent physical and mechanical properties such as high specific strength, specific modulus, wear resistance, and high temperature resistance, making it an important field of high-tech research and development in various countries. [0003] Molybdenum is a metal element with a series of advantages such as high melting point and low thermal expansion coefficient. However, molybdenum and molybdenum alloys have the disadvantages of low temperature brittleness, recrystallization brittleness and high temperature oxidation resistance, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/04C22C32/00C22C1/05
CPCC22C1/05C22C27/04C22C32/0031
Inventor 赵虎
Owner JINDUICHENG MOLYBDENUM CO LTD
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