Method for preparing Fe-Al-Ta multifunctional integrated material through Bridgeman directional solidification technology

Abstract

The invention discloses a method for preparing a Fe-Al-Ta multifunctional integrated material through the Bridgeman directional solidification technology. Through changing of the solidification rate of a Fe-Al-Ta ternary alloy in different areas, the solidification structure character is changed, and accordingly the Fe-Al-Ta multifunctional integrated material is obtained. In the low solidification rate, the structure is lamellar eutectic, and along with increasing of the solidification rate, the structure is converted into rod-like eutectic; and when the solidification rate is further increased, the structure is gradually converted into spherical eutectic. Since the solidification structures different in solidification rate are different in performance, the material performance can be changed by changing the solidification rates of different areas, accordingly, the material performance is centralized, simplified and diverse, the material integrating multiple functions is prepared, andthe comprehensive performance of the material is improved.

Description

technical field

[0001] The invention belongs to the field of metallurgy technology, and relates to a specific processing technology for a specific area of ​​a material, in particular to a Fe-Al-Ta eutectic composite material, which is a multi-functional Fe-Al-Ta prepared by Bridgman directional solidification technology. One-material approach. Background technique

[0002] With the rapid development of modern technology, components continue to develop in the direction of miniaturization, centralization, and large storage capacity. Although composite materials with excellent performance can be prepared by various preparation technologies, there are still many problems in practical applications, such as the tendency of material properties to be single and the utilization rate to be low. This is because materials with good comprehensive properties are often required in practical applications, so higher requirements are placed on the processing and preparation of materials. In...

Examples

Embodiment 1

[0040] 1) Fix the corundum tube on the pull rod, and then put the wire-cut test rod into it to ensure that the corundum tube and the test rod are located in the center of the graphite sleeve. Turn on the mechanical pump and the molecular pump in turn to evacuate until the vacuum degree is 4.0×10 -2 At Pa, adjust the heating power step by step to 2.5Kw, 5Kw and 7Kw. During the heating period, when the composite vacuum count value drops to 0, turn off the molecular pump and the mechanical pump in sequence. After heating for 20 minutes, follow the set drawing rate and drawing stroke (pumping The pulling rate is the rate at which the sample moves downward into the cooling liquid, such as 6 μm / s; the pulling stroke refers to the distance of the downward movement) for pulling. Turn off the heating power after the drawing is completed, and turn off the circulating water after 30 minutes to cool down with the furnace. After 90 minutes, the directionally solidified sample is completely...

Embodiment 2

[0043] 1) Fix the corundum tube on the pull rod, and then put the wire-cut test rod into it to ensure that the corundum tube and the test rod are located in the center of the graphite sleeve. Turn on the mechanical pump and the molecular pump in turn to evacuate until the vacuum degree is 4.0×10 -2 At Pa, adjust the heating power step by step to 2.5Kw, 5Kw, and 7Kw. During the heating period, when the composite vacuum count value drops to 0, turn off the molecular pump and the mechanical pump in sequence. After heating for 20 minutes, pump according to the set pulling rate and pulling stroke. pull. Turn off the heating power after the drawing is completed, and turn off the circulating water after 30 minutes to cool down with the furnace. After 90 minutes, the directionally solidified sample is completely cooled and can be taken out of the furnace.

[0044] 2) When the material is required to be excellent in plasticity, toughness and fatigue resistance when it is in service, i...

Embodiment 3

[0046] 1) Fix the corundum tube on the pull rod, and then put the wire-cut test rod into it to ensure that the corundum tube and the test rod are located in the center of the graphite sleeve. Turn on the mechanical pump and the molecular pump in turn to evacuate until the vacuum degree is 4.0×10 -2 At Pa, adjust the heating power step by step to 2.5Kw, 5Kw, and 7Kw. During the heating period, when the composite vacuum count value drops to 0, turn off the molecular pump and the mechanical pump in sequence. After heating for 20 minutes, pump according to the set pulling rate and pulling stroke. pull. Turn off the heating power after the drawing is completed, and turn off the circulating water after 30 minutes to cool down with the furnace. After 90 minutes, the directionally solidified sample is completely cooled and can be taken out of the furnace.

[0047] 2) When the material is in service and requires excellent wear resistance and strength, it is directional solidified at a...

technical field

[0001] The invention belongs to the field of metallurgy technology, and relates to a specific processing technology for a specific area of ​​a material, in particular to a Fe-Al-Ta eutectic composite material, which is a multi-functional Fe-Al-Ta prepared by Bridgman directional solidification technology. One-material approach. Background technique

[0002] With the rapid development of modern technology, components continue to develop in the direction of miniaturization, centralization, and large storage capacity. Although composite materials with excellent performance can be prepared by various preparation technologies, there are still many problems in practical applications, such as the tendency of material properties to be single and the utilization rate to be low. This is because materials with good comprehensive properties are often required in practical applications, so higher requirements are placed on the processing and preparation of materials. In...

Examples

Embodiment 1

[0040] 1) Fix the corundum tube on the pull rod, and then put the wire-cut test rod into it to ensure that the corundum tube and the test rod are located in the center of the graphite sleeve. Turn on the mechanical pump and the molecular pump in turn to evacuate until the vacuum degree is 4.0×10 -2 At Pa, adjust the heating power step by step to 2.5Kw, 5Kw and 7Kw. During the heating period, when the composite vacuum count value drops to 0, turn off the molecular pump and the mechanical pump in sequence. After heating for 20 minutes, follow the set drawing rate and drawing stroke (pumping The pulling rate is the rate at which the sample moves downward into the cooling liquid, such as 6 μm / s; the pulling stroke refers to the distance of the downward movement) for pulling. Turn off the heating power after the drawing is completed, and turn off the circulating water after 30 minutes to cool down with the furnace. After 90 minutes, the directionally solidified sample is completely...

Embodiment 2

[0043] 1) Fix the corundum tube on the pull rod, and then put the wire-cut test rod into it to ensure that the corundum tube and the test rod are located in the center of the graphite sleeve. Turn on the mechanical pump and the molecular pump in turn to evacuate until the vacuum degree is 4.0×10 -2 At Pa, adjust the heating power step by step to 2.5Kw, 5Kw, and 7Kw. During the heating period, when the composite vacuum count value drops to 0, turn off the molecular pump and the mechanical pump in sequence. After heating for 20 minutes, pump according to the set pulling rate and pulling stroke. pull. Turn off the heating power after the drawing is completed, and turn off the circulating water after 30 minutes to cool down with the furnace. After 90 minutes, the directionally solidified sample is completely cooled and can be taken out of the furnace.

[0044] 2) When the material is required to be excellent in plasticity, toughness and fatigue resistance when it is in service, i...

Embodiment 3

[0046] 1) Fix the corundum tube on the pull rod, and then put the wire-cut test rod into it to ensure that the corundum tube and the test rod are located in the center of the graphite sleeve. Turn on the mechanical pump and the molecular pump in turn to evacuate until the vacuum degree is 4.0×10 -2 At Pa, adjust the heating power step by step to 2.5Kw, 5Kw, and 7Kw. During the heating period, when the composite vacuum count value drops to 0, turn off the molecular pump and the mechanical pump in sequence. After heating for 20 minutes, pump according to the set pulling rate and pulling stroke. pull. Turn off the heating power after the drawing is completed, and turn off the circulating water after 30 minutes to cool down with the furnace. After 90 minutes, the directionally solidified sample is completely cooled and can be taken out of the furnace.

[0047] 2) When the material is in service and requires excellent wear resistance and strength, it is directional solidified at a...

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