Manufacturing process for non-magnetic Cu-base alloy basebands in strong cubic texture

A strong cubic texture, non-magnetic technology, applied in metal rolling and other directions, can solve the problems of baseband grain boundary quality characterization, hysteresis loss, etc.

Active Publication Date: 2014-06-11
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

Nickel-tungsten alloy baseband is the most widely studied alloy baseband. At present, Ni-5at.%W alloy baseband has been commercially produced, but because its Curie temperature is 330K, it has ferromagnetism (under T=77K). It will cause hysteresis loss. In order to solve this problem, some groups have studied the non-magnetic alloy base band. The non-magnetic alloy base band prepared after adding 9at.%V, Mo, W, and 13at.%Cr in Ni High content of cubic texture
However, the price of nickel is relatively high, and the price of copper is 6 times cheaper than that of nickel, and copper and nickel can form a complete solid solution. It is found that when the content of copper is above 54at.%, the copper-nickel alloy baseband is at T=77K The following is non-magnetic. Chinese patent CN1408889A (publication date 2003.4.9) discloses adding Ni element with a weight percentage of less than 40% in Cu to prepare a non-magnetic copper-nickel alloy base band, but there is no crystallinity of the base band. However, in the textured metal alloy baseband for coated conductors, the existence of annealing twins and high-angle grain boundaries will seriously affect the critical current density in superconductivity, so it is important to characterize the grain boundary quality of the alloy baseband significance

Method used

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  • Manufacturing process for non-magnetic Cu-base alloy basebands in strong cubic texture
  • Manufacturing process for non-magnetic Cu-base alloy basebands in strong cubic texture
  • Manufacturing process for non-magnetic Cu-base alloy basebands in strong cubic texture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The electrolytic Cu and electrolytic Ni with a purity of 99.9% are mixed according to the weight of copper and nickel at 60:40, and the two raw materials are melted in an electromagnetic induction vacuum melting furnace to obtain Cu 60 Ni 40 Alloy initial ingot; then heat the alloy ingot at 850°C for 2 hours, then hot forge it into a 400mm, 30mm wide, and 20mm high billet, and then carry out hot rolling treatment. Rolling, the deformation of each pass is 10%, the total deformation is 30%, and finally wire-cut to obtain Cu with the dimensions of length, width and height respectively 20mm×15mm×10mm 60 Ni 40 Alloy ingots. Then it is subjected to a cold rolling treatment with a deformation amount of 5% per pass and a total deformation amount of 99%, to obtain an alloy base strip with a thickness of 100 μm. The cold-rolled base strip was placed in Ar / 4%H 2 Under the protection of mixed gas, a two-step annealing process was adopted. First, the temperature was raised to 55...

Embodiment 2

[0019] The electrolytic Cu and electrolytic Ni with a purity of 99.9% are mixed according to the weight of copper and nickel at 70:30, and the two raw materials are melted in an electromagnetic induction vacuum melting furnace to obtain Cu 70 Ni 30 Alloy initial ingot; then heat the alloy ingot at 850°C for 2 hours, then hot forge it into a 450mm, 30mm wide, and 15mm high ingot, and then carry out hot rolling treatment. Rolling, the pass deformation is 8%, the total deformation is 30%, and finally the wire cutting obtains Cu with the dimensions of length, width and height respectively 20mm×15mm×10mm 70 Ni 30 Alloy ingots. Then it is subjected to a cold rolling treatment with a deformation amount of 4% per pass and a total deformation amount of 99%, to obtain an alloy base strip with a thickness of 100 μm. The cold-rolled base strip was placed in Ar / 4%H 2 Under the protection of mixed gas, a two-step annealing process was adopted. First, the temperature was raised to 550°C ...

Embodiment 3

[0021] The electrolytic Cu and electrolytic Ni with a purity of 99.9% are mixed according to the weight of copper and nickel at 80:20, and the two raw materials are melted in an electromagnetic induction vacuum melting furnace to obtain Cu 80 Ni 20 Alloy initial ingot; then heat the alloy ingot at 850°C for 2 hours, then hot forge it into a 400mm, 33mm wide, and 17mm high ingot, and then carry out hot rolling treatment. Rolling, the deformation of each pass is 10%, the total deformation is 40%, and finally wire-cut to obtain Cu with the dimensions of length, width and height respectively 20mm×15mm×10mm 80 Ni 20 Alloy ingots. Then it is subjected to a cold rolling treatment with a deformation amount of 3% per pass and a total deformation amount of 99.2%, to obtain an alloy base strip with a thickness of 80 μm. The cold-rolled base strip was placed in Ar / 4%H 2 Under the protection of mixed gas, a two-step annealing process was adopted. First, the temperature was raised to 55...

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Abstract

A manufacturing process for non-magnetic Cu-base alloy basebands in strong cubic texture belongs to the technical field of metal basebands in high-temperature superconducting coating conductor structure. The manufacturing process includes steps of firstly obtaining CuNi alloy primary ingots by smelting electrolytic Cu and electrolytic Ni into an electromagnetic induction vacuum smelting furnace according to the requirement of keeping the content of copper over than 54at.%; secondly, forging the primary ingots into billets under heat after the primary ingots are preserved at the temperature of 850 DEG C for two hours, rising the temperature of the furnace to 850 DEG C, rolling the billets under heat after the billets are preserved at the temperature of 850 DEG C for two hours, and obtaining the alloy basebands by means of cold rolling of the billets after hot rolling; thirdly, rising the temperature to 550 DEG C by the temperature rise rate of 5-10 DEG C / min, preserving the basebands at the temperature of 550 DEG C for 30 min after the basebands are subjected to two steps of annealing process under protection of Ar / H2 mixed gas, and then rising the temperature to 950 DEG C by the temperature rise rate of 5-10 DEG C / min and preserving the basebands at the temperature of 950 DEG C for 30min. The basebands manufactured by the manufacturing process have sharp cubic texture and excellent grain boundary quality, and are non-magnetic when in a liquid nitrogen temperature zone.

Description

technical field [0001] The invention relates to a method for preparing a Cu-based alloy substrate with a non-magnetic strong cubic texture, and belongs to the technical field of high-temperature superconducting coating conductor textured metal substrates. Background technique [0002] to Y 1 Ba 2 Cu 3 o 7-σ (YBCO)-based rare earth second-generation high-temperature coated superconducting materials have potential applications in many aspects such as electricity, transportation, transportation, magnet technology, military, etc. due to their inherent physical properties. For the textured base tape used for YBCO coated conductors, it needs to have high texture degree, small AC loss and high yield strength. Nickel-tungsten alloy baseband is the most widely studied alloy baseband. At present, Ni-5at.%W alloy baseband has been commercially produced, but because its Curie temperature is 330K, it has ferromagnetism (under T=77K). It will cause hysteresis loss. In order to solve ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/26C22F1/08
Inventor 索红莉王金华邱火勤马麟王毅田辉袁冬梅王营霞
Owner 深创超导(深圳)科技有限公司
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