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Bimetal composite cube structured Ni-Ti base band and its preparation method

A technology of cubic texture and bimetal, which is applied in the direction of metal rolling, manufacturing tools, heat treatment equipment, etc., can solve the problem that the alloy is not easy to form a sharp cubic texture, so as to achieve easy mass production, increase mechanical strength, good The effect of mechanical strength

Inactive Publication Date: 2006-06-21
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, alloys such as Ni-Cr and Ni-W are prepared, but after alloying, the formed alloy is not easy to form a sharp cubic texture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] A Ni tube of ordinary purity (purity higher than 99%), with an outer diameter of 16mm and an inner diameter of 10mm, after cleaning the inner and outer surfaces, puts a pure Ti rod with an outer diameter of 10mm into the inner hole to form a composite. The composite was processed into a circular wire with an outer diameter of 3 mm by rolling or drawing. Use a flat roll to form a strip with a thickness of 0.2mm and a width of about 5mm. The composite strip is heated to 950°C for 2 hours in a pure argon atmosphere to make a Ni-Ti bimetallic composite with a good cubic texture. Baseband. In this bimetallic composite base tape, the volume fraction of cubic texture is higher than 90% (estimated by March-Doler function). The microhardness reflects the ability of the material to resist microplastic deformation. The test results of the control sample show that the microhardness test value of the Ni-Ti bimetallic composite substrate is 192, which is significantly higher than th...

example 2

[0018] Put a Ni tube of ordinary purity (purity higher than 99%), with an outer diameter of 16mm and an inner diameter of 10mm. After cleaning the inner and outer surfaces, put a pure Ti rod with an outer diameter of 10mm in the inner hole, and use the explosive composite method to make a composite body. By stretching, the composite was processed into a circular wire with an outer diameter of 3 mm. Use a flat roll to form a strip with a thickness of 0.2 mm and a width of about 5 mm. The composite strip is heated to 1000 ° C for 1 hour in a pure argon atmosphere to form a Ni-Ti bimetallic composite with a good cubic texture. Baseband. It is also possible to obtain composite base tapes with volume fractions of cubic texture higher than 95%. The microhardness test shows that the microhardness value of the Ni-Ti bimetal composite substrate is 150-190, and the specific value is related to the heat treatment temperature and time, which is much higher than that of the pure Ni subst...

example 3

[0020] A high-purity (purity higher than 99.99%) Ni tube with an outer diameter of 16 mm and an inner diameter of 10 mm is cleaned, and then a pure Ti rod with an outer diameter of 10 mm is placed in the inner hole, and the compound is made by explosive compounding. body. By stretching, the composite was processed into a circular wire with an outer diameter of 3 mm. Use a flat roll to roll a strip with a thickness of 0.2mm and a width of about 5mm. Put the composite strip at a vacuum degree higher than 10 -4 Under Pa, heating to 1100°C for 0.5 hours, using this high-purity Ni as the raw material can produce a Ni-Ti bimetallic composite substrate with a volume fraction of cubic texture higher than 99%. The microhardness test of the samples in the control group showed that the mechanical strength of the bimetallic composite substrate had been significantly improved.

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Abstract

The invention relates duplex metal composite cubic structure Ni-Ti baseband and preparing method, which is used for YBCO coating conductor and possesses the high mechanical strength. The baseband is comprises Ni possessing cubic structure and Ti in the core of Ni baseband. The method comprises the following steps: processing the Ni and Ti to complex, cold working it to required band at the 95% cold working rate, at 950-1100Deg.C, heat treating for 0.5-2 hours and getting cubic structure. The Ni-Ti baseband possesses good cubic structure and mechanical property. The invention is simple technology, good repeatability and easy to produce. The Ni-Ti baseband possesses not only good cubic structure, but also high mechanical strength and low magnetism.

Description

technical field [0001] A bimetal composite cubic texture Ni-Ti base strip and a preparation method thereof relate to a bimetal composite cubic texture Ni-Ti base strip with high mechanical strength for YBCO coated conductors and a preparation method thereof. Background technique [0002] YBCO coated conductor has good superconducting properties and is a high-temperature superconducting material with good application prospects. The United States, Japan, Europe and my country are all competing to develop this material. Cubic textured Ni substrate is the key material for the preparation of YBCO coated conductors. Because the lattice constant and thermal expansion coefficient of metal Ni are relatively close to those of YBCO, it is a more suitable baseband material for YBCO coated conductors. In the past, there have been preparation techniques and patents [ZL 97 1 21916.8] for cubic textured Ni basebands. However, during the recrystallization annealing of pure Ni, the cubic t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/04B21B3/00C21D8/02C21D11/00
Inventor 刘春芳郑俊涛卢亚锋李成山吴晓祖纪平张平祥周廉
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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