CN102500638B

CN102500638B - Method for producing high-cube-texture high-tungsten-content NI (nickel)-W (tungsten) alloy substrate bands

Info

Publication number: CN102500638B
Application number: CN201110377866.0A
Authority: CN
Inventors: 索红莉; 袁冬梅; 高忙忙; 马麟; 王金华; 田辉; 王营霞
Original assignee: Beijing University of Technology
Current assignee: Shenchuang Superconductor Shenzhen Technology Co ltd
Priority date: 2011-11-24
Filing date: 2011-11-24
Publication date: 2014-07-23
Anticipated expiration: 2031-11-24
Also published as: CN102500638A

Abstract

The invention discloses a method for producing high-cube-texture high-tungsten-content Ni (nickel)-W (tungsten) alloy substrate bands, which belongs to the technical field of high-temperature superconducting coated conductor metal substrate bands. By means of heat treatment in a rolling workshop and by improving the deformation texture of cold-rolled substrate bands and increasing content of cubic oriented crystals in the cold-rolled substrate bands, content of the cube texture of the high-tungsten-content NI-W alloy substrate bands is increased effectively and metal substrate bands with high cube texture content are formed. The high-tungsten-content NI-W alloy substrate bands produced by the method are high in mechanical strength, have no (low) magnetism, have fine surface quality and sharp cube texture, and can meet the requirement of further improving performance of YBCO (yttrium barium copper oxide) coated conductors.

Description

A kind of preparation method of high cubic texture Ni-W alloy base band with high W content

Technical field

The present invention relates to a kind of cubic texture Ni-W alloy base band with high W content preparation method used for coating conductor, belong to conductor of high-temperature superconductor coat metal base band technical field.

Background technology

With YBa ₂cu ₃o _7-x(YBCO) be the second generation high temperature superconducting materia of representative, because it compares the superior function of first generation high temperature superconducting materia, thereby obtained people's extensive concern and further investigation.In view of the topology requirement of coating conductor, the character such as highly-textured, low (nothing) magnetic, high strength are the keys that obtains high-performance metal base band.In the multiple metal alloy base band that is applied to coating conductor, Ni5at.%W alloy base band is that people study one of system, the most deep base band material.Although Ni5W has easy acquisition cubic texture, the advantage such as with low cost and good in oxidation resistance, under 77K, still there is ferromagnetism and yield strength lower, thereby limited coating conductor application in actual applications.In order further to improve the mechanical performance of NiW alloy base band and to reduce the A.C.power loss in practical application, preparing high W content NiW alloy base band is an effective thinking.Research shows, the fine inferior position that has made up low W content nickel tungsten of high W content nickel tungsten energy, but in the time that the increase of W atom content is greater than 5%, the stacking fault energy of alloy significantly reduces thereupon, so be difficult for obtaining high cubic texture content by traditional rolling and recrystallization Technology for Heating Processing.So far, high cubic texture high W content NiW alloy base band is all expected to obtain by each research group.Therefore, preparation texture high W content NiW alloy base band is considered to the significant challenge of coating conductor base band research.

Summary of the invention

The object of this invention is to provide a kind of effective preparation method who improves high W content NiW alloy base band cubic texture.

The present invention adopts heat-treating methods between rolling, by improving cold rolling base band deformation texture, change from brass type texture to copper type texture, and improved tissue in there is preference return and the content of cube orientation of the advantage of growing up, thereby effectively improve the content of high W content NiW alloy base band cubic texture, obtain the metal base band of high cubic texture content.Concrete technology step is as follows:

(1) raw material proportioning and the initially preparation of billet

Purity is to 99.99% Ni piece and W piece, the proportioning that is 7-9.3% by W atom percentage content becomes NiW Alloy solid solution in 1500～1700 DEG C of melting 5～15min under vacuum condition, then casts, and can obtain the initial ingot casting of alloy of NiW after forge hot; Initial ingot casting is carried out obtaining initial billet after hot rolling;

(2) thermomechanical rolling of initial billet

Thermomechanical rolling step is as follows: a) initial billet is carried out to deflection 50～70% cold rolling, then at ArH ₂under mixed gas protected or vacuum condition in 400～700 DEG C of annealing 30～120min, wherein H ₂volume accounts for ArH ₂4% of mist cumulative volume; B) existing thickness is carried out to deflection 50～70% cold rolling, then at ArH ₂under mixed gas protected or vacuum condition in 400～700 DEG C of annealing 30～120min, wherein H ₂volume accounts for ArH ₂4% of mist cumulative volume; C) repeating step b) 0～3 time; D) the cold rolling total deformation that obtains is not less than 95%, and thickness is the cold rolling base band of 60～120 μ m, and in above-mentioned steps, pass deformation is 5～15%; (3) the recrystallization heat treatment of cold rolling base band

The cold rolling base band that step (2) obtains is at ArH ₂under mixed gas protected or vacuum condition in 600～800 DEG C of annealing 60min, wherein H ₂volume accounts for ArH ₂4% of mist cumulative volume, and then be warming up to 1000～1200 DEG C of annealing 30～90min, obtain high W content NiW alloy base band used for coating conductor.

The key of the technology of the present invention is the selection to heat treated deflection and temperature between initial billet rolling in step (2), final cold rolling base band obtains and is conducive to form the deformation texture of cubic texture after recrystallization annealing, and has increased the nucleation rate of cubic grain in recrystallization process.

The high W content NiW alloy base band that method of the present invention makes has following feature:

1, between rolling, in heat treatment process, release portion deformation stores energy, alleviates work hardening;

2, the cold rolling base band deformation texture of alloy of the present invention changes copper type texture into by brass type, is conducive to the formation of base band cubic grain in recrystallization process;

3, than without heat treated high W content NiW alloy between rolling, in its cold rolling base band, cube orientation crystal grain content obviously improves, and therefore base band has better cubic texture;

Brief description of the drawings

Fig. 1 a is (001) the face utmost point figure after the Ni base alloy baseband of preparation in embodiment 1 is annealed;

Fig. 1 b is (111) the face utmost point figure after the Ni base alloy baseband of preparation in embodiment 1 is annealed;

Fig. 2 a is (001) the face utmost point figure after the Ni base alloy baseband of preparation in embodiment 2 is annealed;

Fig. 2 b is (111) the face utmost point figure after the Ni base alloy baseband of preparation in embodiment 2 is annealed;

Fig. 3 is (111) utmost point figure of the cold rolling base band of Ni base alloy of preparation in embodiment 3;

Fig. 4 a is (001) the face utmost point figure after the Ni base alloy baseband of preparation in embodiment 4 is annealed;

Fig. 4 b is (111) the face utmost point figure after the Ni base alloy baseband of preparation in embodiment 4 is annealed.

Detailed description of the invention

Below in conjunction with drawings and Examples, the present invention is described in further detail, but the present invention is not limited to following examples.

Embodiment 1

Purity is to 99.99% Ni piece and W piece, the proportioning that is 7% by the atomic percentage conc of W becomes NiW Alloy solid solution in 1600 DEG C of melting 10min under vacuum condition, then casting, and forging can obtain the initial ingot casting of NiW alloy; Initial ingot casting is carried out obtaining initial billet after hot rolling; A) initial billet is carried out to deflection 70% cold rolling, then at ArH ₂under mixed gas protected condition in 400 DEG C annealing 30min, wherein H ₂volume accounts for ArH ₂4% of mist cumulative volume; B) existing thickness is carried out to deflection 70% cold rolling, then at ArH ₂under mixed gas protected condition in 400 DEG C annealing 30min, wherein H ₂volume accounts for ArH ₂4% of mist cumulative volume; C) repeating step b) 0 time; D) the final cold rolling total deformation 98% that obtains, thickness is the cold rolling base band of 80 μ m, in above-mentioned steps, pass deformation is 10%; Cold rolling base band is at ArH ₂60min, wherein H anneal under mixed gas protected atmosphere at 600 DEG C ₂volume accounts for ArH ₂4% of mist cumulative volume, and then be warming up to 1100 DEG C of annealing 60min, obtain final products alloy base band.As shown in Figure 1, as shown in Figure 1, this alloy base band has strong cubic texture for (001) of this alloy base band and (111) face utmost point figure.

Embodiment 2

Purity is to 99.99% Ni piece and W piece, the proportioning that is 9.3% by the atomic percentage conc of W becomes NiW Alloy solid solution in 1500 DEG C of melting 15min under vacuum condition, then casting, and forging can obtain the initial ingot casting of NiW alloy; Initial ingot casting is carried out obtaining initial billet after hot rolling; A) initial billet is carried out to deflection 60% cold rolling, then at ArH ₂under mixed gas protected condition in 650 DEG C annealing 120min, wherein H ₂volume accounts for ArH ₂4% of mist cumulative volume; B) existing thickness is carried out to deflection 60% cold rolling, then at ArH ₂under mixed gas protected condition in 650 DEG C annealing 120min, wherein H ₂volume accounts for ArH ₂4% of mist cumulative volume; C) repeating step b) 2 times; D) the final cold rolling total deformation 98% that obtains, thickness is the cold rolling base band of 120 μ m, in above-mentioned steps, pass deformation is 5%; Cold rolling base band is at ArH ₂60min, wherein H anneal under mixed gas protected atmosphere at 800 DEG C ₂volume accounts for ArH ₂4% of mist cumulative volume, and then be warming up to 1000 DEG C of annealing 90min, obtain final products alloy base band.As shown in Figure 2, as shown in Figure 2, this alloy base band has strong cubic texture for (001) of this alloy base band and (111) face utmost point figure.

Embodiment 3

Purity is to 99.99% Ni piece and W piece, the proportioning that is 7% by the atomic percentage conc of W becomes NiW Alloy solid solution in 1600 DEG C of melting 10min under vacuum condition, then casting, and forging can obtain the initial ingot casting of NiW alloy; Initial ingot casting is carried out obtaining initial billet after hot rolling; A) initial billet is carried out to deflection 50% cold rolling, then at ArH ₂under mixed gas protected condition in 650 DEG C annealing 120min, wherein H ₂volume accounts for ArH ₂4% of mist cumulative volume; B) existing thickness is carried out to deflection 50% cold rolling, then at ArH ₂under mixed gas protected condition in 650 DEG C annealing 120min, wherein H ₂volume accounts for ArH ₂4% of mist cumulative volume; C) repeating step b) 3 times; C) the final cold rolling total deformation 98% that obtains, thickness is the cold rolling base band of 80 μ m, in above-mentioned steps, pass deformation is 5%; Cold rolling base band is at ArH ₂60min, wherein H anneal under mixed gas protected atmosphere at 750 DEG C ₂volume accounts for ArH ₂4% of mist cumulative volume, and then be warming up to 1000 DEG C of annealing 90min, obtain final products alloy base band.As shown in Figure 3, as shown in Figure 3, the cold rolling base band of this alloy has copper type deformation texture to (111) utmost point figure of the cold rolling base band of this alloy.

Embodiment 4

Purity is to 99.99% Ni piece and W piece, the proportioning that is 8% by the atomic percentage conc of W becomes NiW Alloy solid solution in 1700 DEG C of melting 5min under vacuum condition, then casting, and forging can obtain the initial ingot casting of NiW alloy; Initial ingot casting is carried out obtaining initial billet after hot rolling; A) initial billet is carried out to deflection 60% cold rolling, then under vacuum condition in 700 DEG C of annealing 90min; B) existing thickness is carried out to deflection 60% cold rolling, then under vacuum condition in 700 DEG C of annealing 90min; C) repeating step b) 3 times; C) the final cold rolling total deformation 95% that obtains, thickness is the cold rolling base band of 60 μ m, in above-mentioned steps, pass deformation is 15%; The cold rolling base band 60min that anneals at 800 DEG C under vacuum condition, and then be warming up to 1200 DEG C of annealing 30min, obtain final products alloy base band.As shown in Figure 4, as shown in Figure 4, this alloy base band has strong cubic texture for (001) of this alloy base band and (111) face utmost point figure.

Claims

1. a preparation method for high cubic texture Ni-W alloy base band with high W content, is characterized in that, concrete technology step is as follows:

(1) raw material proportioning and the initially preparation of billet

By Ni piece and W piece, the proportioning that is 7-9.3% by W atom percentage content becomes NiW Alloy solid solution in 1500～1700 DEG C of melting 5～15min under vacuum condition, then casts, and can obtain the initial ingot casting of alloy of NiW after forge hot; Initial ingot casting is carried out obtaining initial billet after hot rolling;

(2) thermomechanical rolling of initial billet

Thermomechanical rolling step is as follows: a) initial billet is carried out to deflection 50～70% cold rolling, then at ArH ₂under mixed gas protected or vacuum condition in 400～700 DEG C of annealing 30～120min, wherein H ₂volume accounts for ArH ₂4% of mist cumulative volume; B) existing thickness is carried out to deflection 50～70% cold rolling, then at ArH ₂under mixed gas protected or vacuum condition in 400～700 DEG C of annealing 30～120min, wherein H ₂volume accounts for ArH ₂4% of mist cumulative volume; C) repeating step b) 0～3 time; D) the cold rolling total deformation that obtains is not less than 95%, and thickness is the cold rolling base band of 60～120 μ m, and in above-mentioned steps, pass deformation is 5～15%;

(3) the recrystallization heat treatment of cold rolling base band