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Nano-dispersed copper alloy with high airtightness and low free oxygen content and its short-flow preparation process

一种制备工艺、氧含量的技术，应用在金属加工设备、运输和包装等方向，能够解决纳米弥散铜合金自由氧含量高、低自由氧含量纳米弥散铜合金、气密性低等问题，达到自由氧含量低、尺寸稳定性高、气密性好的效果

Active Publication Date: 2020-09-29
HUNAN GAOCHUANG KEWEI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome existing internal oxidation and prepare Cu-Al 2 o 3 Nano-dispersed copper alloy has the problems of high residual free oxygen content and low air tightness. To provide a high air-tight and low free oxygen content nano-dispersed copper alloy and a short-flow preparation process

Method used

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  • Nano-dispersed copper alloy with high airtightness and low free oxygen content and its short-flow preparation process
  • Nano-dispersed copper alloy with high airtightness and low free oxygen content and its short-flow preparation process
  • Nano-dispersed copper alloy with high airtightness and low free oxygen content and its short-flow preparation process

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Effect test

Embodiment 1

[0039] Cu-0.1wt%Ca-0.1wt%La alloy is smelted under inert gas protection at 1200°C, prepared by high-purity nitrogen atomization, sieved, and high-energy ball milled to obtain ultrafine powder (average particle size less than or equal to 20 microns). Al and Cu are smelted at 1218-1230°C to form a Cu-Al alloy with an Al content of 0.04wt%. The alloy powder is prepared by atomization with high-purity nitrogen gas, and the alloy powder with a particle size of less than 40 meshes is sieved, and mixed with an oxidant Mix and ball mill, internally oxidize the mixed powder with an oxidant at 386-395°C for 2 hours, then carry out internal oxidation at 892-900°C for 3 hours, crush the above-mentioned internally oxidized powder, and reduce with hydrogen at 885-893°C 6 hours, mixed with Cu-Ca-La alloy ultrafine powder according to the ratio of 15:1, cold isostatic pressing of the above mixed powder, pure copper sheath in argon chamber, hot extrusion at 900°C water seal, extrusion ratio 15 ...

Embodiment 2

[0043] The Cu-0.1wt%Ca-0.1wt%La alloy is smelted under inert gas protection at 1200°C, prepared by high-purity nitrogen atomization, sieved, and high-energy ball milled to obtain ultrafine powder (average particle size less than or equal to 20 microns). Al and Cu are smelted at 1200-1222°C to form a Cu-Al alloy with an Al content of 0.12wt%. The alloy powder is prepared by atomization with high-purity nitrogen gas, and the alloy powder with a particle size of less than 40 meshes is sieved, and mixed with an oxidant Mix and perform ball milling, internally oxidize the mixed powder with an oxidizing agent at 392-400°C for 2 hours, then oxidize at 893-898°C for 3 hours, crush the above-mentioned internally oxidized powder, and reduce with hydrogen at 895-900°C for 6 hours, Mix with Cu-Ca-La alloy ultrafine powder according to the ratio of 13:1, cold isostatic press the above powder, argon chamber pure copper sheath, 900 ℃ water seal hot extrusion, extrusion ratio 15:1, Swaged aft...

Embodiment 3

[0047] The Cu-0.1wt%Ca-0.1wt%La alloy is smelted under inert gas protection at 1200°C, prepared by high-purity nitrogen atomization, sieved, and high-energy ball milled to obtain ultrafine powder (average particle size less than or equal to 20 microns). Al and Cu are smelted at 1215-1230°C to form a Cu-Al alloy with an Al content of 0.30wt%. The alloy powder is prepared by atomization with high-purity nitrogen gas, and the alloy powder with a particle size of less than 40 meshes is sieved, and then mixed with an oxidant Mix and perform ball milling, internally oxidize the mixed powder with an oxidizing agent at 382-393°C for 2 hours, then oxidize at 887-896°C for 3 hours, crush the above-mentioned internally oxidized powder, and reduce with hydrogen at 892-898°C for 6 hours, Mix with Cu-Ca-La alloy ultrafine powder according to the ratio of 10:1, cold isostatic press the above powder, argon chamber pure copper sheath, 900 ℃ water seal hot extrusion, extrusion ratio 15:1, Swage...

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Abstract

A nano-dispersed copper alloy with high airtightness and low free oxygen content and a short-flow preparation process, the alloy component includes Al 2 o 3 , Ca, La. Its preparation process is to prepare Cu-Al by internal oxidation method 2 o 3 Alloy powder, then mixed with Cu‑Ca‑La alloy powder, wrapped the mixed powder under the protection of argon, hot extrusion at 900‑920°C and then swaged, after swaging, vacuum the inside of the bag to ≤10 ‑3 Pa, seal the bag and place it in a nitrogen atmosphere at 450-550°C and a pressure of 40-60Mpa for 3-5 hours. The invention utilizes the secondary solid reduction of Ca and La to effectively remove residual free oxygen and achieve the effect of dispersion strengthening, and finally achieve high densification through creep deformation at medium temperature in vacuum. The dispersed copper prepared by the invention has low free oxygen content (≤15ppm), high dimensional stability after hydrogen annealing, good air tightness, and air leakage rate≤1.0×10 ‑10 Pam 3 / s, suitable for industrial production, and can be used as a material for various sealing devices, such as electric vacuum housing sealing devices, high-voltage DC relays for new energy vehicles.

Description

technical field [0001] The invention relates to a nano-dispersed copper alloy with high airtightness and low free oxygen content and a short-flow preparation process, in particular to a Cu-Al alloy with high airtightness and low free oxygen content 2 o 3 -CaO-La 2 o 3 Nano-dispersed copper alloy and short-flow preparation process. The invention belongs to the technical field of nano-dispersed copper alloy preparation. Background technique [0002] Nano-dispersion strengthened copper alloy is a new type of structural functional material with excellent comprehensive physical and mechanical properties. It has high strength, high electrical conductivity and good high temperature softening resistance. [0003] The existing technology mainly adopts internal oxidation method to prepare Cu-Al 2 o 3 The specific preparation process of nano-dispersion strengthened copper alloy is as follows: After melting the Cu-Al alloy with suitable composition, it is atomized and sprayed with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C1/10C22C9/00C22C32/00
CPCC22C1/058C22C9/00C22C1/0425B22F2998/10B22F2999/00C22C1/1078B22F9/082B22F2009/043B22F9/16B22F9/22B22F1/14B22F2201/11B22F3/14B22F2201/02B22F2003/208B22F9/04B22F2301/10B22F2302/253C22C1/05C22C32/0021B22F3/172B22F3/20
Inventor 李周邱文婷肖柱龚深
Owner HUNAN GAOCHUANG KEWEI NEW MATERIAL CO LTD
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