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Ni-base alloy composite base band prepared by hot isostatic pressing method

A technology of hot isostatic pressing and composite base tape, applied in the direction of rolling force/roll gap control, etc., which can solve the problems of low magnetic properties, easy cracking of the surface layer and core layer, and difficulty in obtaining composite base tape.

Active Publication Date: 2010-10-06
深创超导(深圳)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the surface layer and the core layer are easy to crack and it is difficult to obtain a composite base tape with good interlayer bonding in the preparation process of the existing composite base tape through the hot isostatic pressing method, so as to provide high-quality YBCO coated superconducting tape. Ni-based composite base tape with high strength, low magnetic properties and strong biaxial cubic texture

Method used

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  • Ni-base alloy composite base band prepared by hot isostatic pressing method
  • Ni-base alloy composite base band prepared by hot isostatic pressing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Grind the NiW powder (code named A powder) with 5 atomic percent of W and the NiW powder (code named B powder) with 12 atomic percent of W respectively, and grind the powder according to A-B-A Sequential layering is placed in the mold; then the above-mentioned layered powder is placed in the mold by traditional powder metallurgy cold isostatic pressing, wherein the pressure is 250MPa, and the pressure is kept for 5 minutes; then the billet is put into the mold according to its size In the designed sheath, after vacuum sealing and welding; then put the sheath into the hot isostatic pressing sintering equipment for homogenization treatment, the sintering temperature is 1200 ℃, the pressure is 130MPa (the working medium is pure Ar), heat preservation Holding time is 10 hours, obtains initial composite ingot, and the metallographic diagram of this composite ingot is as follows figure 1 Shown; The composite billet that is fired is carried out cold-rolling, and the pass defor...

Embodiment 2

[0026] Grind the NiW powder (code named A powder) with 5 atomic percent of W and the NiW powder (code named B powder) with 12 atomic percent of W respectively, and grind the powder according to A-B-A Sequential layering is placed in the mold; then the powder that has been layered in the mold is formed by traditional powder metallurgy cold isostatic pressing, wherein the pressure is 250MPa, and the pressure is maintained for 5min; subsequently, the formed compact is placed in Ar / h 2 Sinter at 1000°C for 5 hours in a protective atmosphere, then put the ingot into a sheath designed according to its size, vacuum seal and weld, then put the sheath into a hot isostatic pressing sintering equipment for homogenization treatment, The sintering temperature is 1200°C, the pressure is 150MPa (the working medium is pure Ar), and the heat preservation and pressure holding time is 6 hours; the sintered composite billet is cold-rolled, and the deformation of each pass is 3-15%, and the total...

Embodiment 3

[0028] Grind the NiW powder (code named A powder) with 5 atomic percent of W and the NiW powder (code named B powder) with 12 atomic percent of W respectively, and grind the powder according to A-B-A Sequential layering is placed in the mold; then the powder that has been layered in the mold is formed by traditional powder metallurgy cold isostatic pressing, wherein the pressure is 250MPa, and the pressure is maintained for 5min; subsequently, the formed compact is placed in Ar / h 2 Sinter at 1000°C for 5 hours in a protective atmosphere, and then put the ingot into a hot isostatic pressing sintering equipment for homogenization treatment. The sintering temperature is 1200°C, the pressure is 80MPa (the working medium is pure Ar), and the holding time is 3 hours; the fired composite ingot is cold-rolled, the pass deformation is 3-15%, and the total deformation is greater than 95%, and the thickness is 100um cold-rolled base strip; the cold-rolled base strip is in Ar / H 2Anneali...

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Abstract

The invention discloses a Ni-base alloy composite base band prepared by a hot isostatic pressing method, belonging to the technical field of a high-temperature coating superconductivity base band. The preparation method comprises the following steps: putting NiW powders (code A) and NiW alloy powders (code B) into a die according to an A-B-A sequence, wherein the atom percent of W of the NiW powders is 3-7%, and the atom percent of W of the NiW alloy powders is 9-12%; pressing and sintering by the hot isostatic pressing to obtain an initial composite billet with even diffused ingredients and favorably combined inner and outer layers and; cold rolling the composite billet with the pass distortion of 3-15% and the total distortion of more than 95%; and obtaining a cold rolling base band with a thickness of 80-150 mu m; annealing the base band for 0.5-2 hours under the protection of an Ar / H2 mixed gas at the temperature of 1000-1400 DEG C to obtain the Ni-based alloy composite base band. The composite base band has high mechanical strength and strong double-shaft texture.

Description

technical field [0001] The invention relates to a method for preparing a Ni-based alloy composite substrate by hot isostatic pressing, and belongs to the technical field of high-temperature superconducting coated conductor metal substrates. Background technique [0002] The second-generation high-temperature coated superconductor represented by YBCO has attracted extensive attention from various research groups around the world. After nearly two decades of research, it has been found that the practical industrial application of YBCO must be based on the preparation of metal substrates with a good cubic texture. Because metallic Ni is easy to form a biaxial cubic texture, metallic pure Ni was mostly used as the baseband material of YBCO strips in early studies, but pure Ni has ferromagnetism and low yield strength, which cannot fully meet the application of YBCO coated superconducting basebands. Require. Chinese patent CN1740357 (disclosure date 2006.3.1) discloses adding a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16C22F1/10B21B37/58
Inventor 邱火勤索红莉寇生中马麟刘敏王丽敏袁冬梅王营霞
Owner 深创超导(深圳)科技有限公司
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