CN104625069A - Nickel-based alloy composite substrate and manufacturing method thereof - Google Patents
Nickel-based alloy composite substrate and manufacturing method thereof Download PDFInfo
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- CN104625069A CN104625069A CN201510034332.6A CN201510034332A CN104625069A CN 104625069 A CN104625069 A CN 104625069A CN 201510034332 A CN201510034332 A CN 201510034332A CN 104625069 A CN104625069 A CN 104625069A
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Abstract
The invention relates to a nickel-based alloy composite substrate and a manufacturing method thereof and belongs to the technical field of manufacturing of high-temperature superconductive metal basebands. By the adoption of the manufacturing method of the nickel-based alloy composite substrate, cost is low, energy consumption is low and the process is easy and convenient. By the adoption of the manufacturing method, a nickel-tungsten alloy composite substrate is manufactured, wherein the content of tungsten atoms in the surface layer is 3%-9%, and the content of tungsten atoms in the core layer is 9%-15%. The manufacturing method comprises the steps that firstly, nickel powder and tungsten powder are mixed into nickel-tungsten powder; secondly, compression molding is conducted on the powder directly through a powder rolling method; thirdly, the nickel-tungsten powder (A) with the content of tungsten being 3%-9% and the nickel-tungsten powder (B) with the content of tungsten being 9%-15% are rolled into billets, the billets are placed in a tunnel furnace according to the sequence of A-B-A, high-temperature sintering is conducted, and then initial composite billets with even composites are obtained; fourthly, the initial composite billets are cold-rolled, the pass deformation is smaller than 10%, the total deformation is larger than 95%, and then a cold-rolled substrate is obtained; fifthly, the cold-rolled substrate is annealed at the temperature of 1000-1400 DEG C, and then the nickel-based alloy composite substrate is obtained. The nickel-based alloy composite substrate is high in overall mechanical strength and low in magnetism, a strong double-axis cube texture is formed on the surface, and the nickel-based alloy composite substrate can be well used as a coating conductor metal substrate.
Description
Technical field
The present invention relates to a kind of Ni base alloy composite baseband, and low cost, low power consuming, the method preparing Ni base alloy composite baseband that process is easy, belong to high-temperature superconductor metal base band preparing technical field.
Background technology
At present, at high-temperature superconductor baseband domain, the maximum of application are exactly NiW alloy base band.The NiW alloy of low W content easily obtains sharp keen cubic texture, but it has ferromagnetism and yield strength is lower, limits application, and it is high W content, the outer NiW composite baseband for low W content that the visual field is expanded to sandwich layer by people.
The method that NiW billet is prepared at present mainly contains smelting process, cold isostatic pressing process, hot isostatic pressing method and discharge plasma sintering method etc., these methods all can obtain function admirable, satisfactory NiW alloy base band, but often kind of method has its pluses and minuses, such as melting and casting method process, advantage is blank even density, W element can fully solid solution, its shortcoming is that smelting temperature height time length causes big energy-consuming cost large, Initial Grain Size is larger, cause occurring cracking in fragility and then the later stage operation of rolling, also have certain influence to the formation of recrystallization cubic texture simultaneously; Cold isostatic pressing process, hot isostatic pressing method advantage are that blank compactness is good, obtain the tissue of even refinement, and shortcoming is that process cycle is long, operating process is complicated, wastes time and energy; Discharge plasma sintering method advantage is the billet that can obtain uniform composition, structure refinement, and then obtains the high sharp keen cubic texture of content, and shortcoming is complex technical process, and bad control is high to equipment requirement.
Summary of the invention
The object of the invention is to propose a kind of method preparing Ni base alloy composite baseband completely newly, by this simple and direct direct powder rolling method, solve in existing base band technology of preparing, the problems such as the complicated and production cost of preparation process is high, for meet high strength, low magnetic, strong twin shaft cubic texture the industrialization of NiW alloy strip steel rolled stock prepare production in a large number and lay good basis.
A kind of Ni base alloy composite baseband, be composited by top layer and sandwich layer, the atomic percentage conc of top layer W is 3-9%, and sandwich layer W atomic percentage conc is 9-15%.
The method preparing Ni base alloy composite baseband provided by the present invention, comprises the following steps:
(1) mixing of initial powder
The NiW powder (code name B) of to be the NiW powder (code name A) of 3-9% and content by W atomic percentage conc be 9-15% carries out long-time ball milling respectively, obtains the powder of two kinds of different ratio;
(2) powder of billet rolls into type
Adopt tilting powder milling train powder to roll into type respectively in two kinds of powder obtained in step (1), obtain two kinds of powder strip plate ingots;
(3) the homogenising sintering of billet
Billet powder in step (2) being rolled forming according to A-B-A order lamination and put into continuous tunnel furnace, in Ar/H
2sinter 4-5 hour under mixed gas protected atmosphere, sintering temperature is 1000-1400 DEG C;
(4) the cold roller and deformed of billet is sintered
Carry out cold rolling to the compound billet be fired in step (3), pass deformation is less than 10%, and total deformation is greater than 95%, obtains the cold rolling composite baseband that final thickness is 50-200 μm;
(5) dynamic recrystallization treatment of cold rolling base band
By the cold rolling composite baseband in step (4) at Ar/H
2in 1000-1400 DEG C of annealing 0.5-3h under mixed gas protected atmosphere, obtain the Ni base alloy composite baseband that surface has strong twin shaft cubic texture.
Key problem in technology of the present invention is to adopt the powder method of rolling to prepare uniform composition, the initial billet of Ni base alloy that crystallite dimension is little, and the intrinsic defect that billet sintering rear surface metallograph demonstrates billet is few.
The present invention adopts powder to roll the standby Ni base alloy composite baseband of legal system, and surface defines the sharp keen twin shaft cubic texture being conducive to subsequently epitaxial growing, and overall base band mechanical strength is high, and magnetic is low, meets the requirement of superconduction baseband performance.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
embodiment 1
Load weighted 265g Ni powder and 35g W powder are mixed into quantitative NiW powder (code name A) by long-time ball milling, load weighted 281g Ni powder and 119g W powder are mixed into quantitative NiW powder (code name B) by long-time ball milling; Then above-mentioned powder is rolled into type respectively by directly adopting powder milling train powder; Again powder strip plate ingot is put into continuous tunnel furnace, in Ar/H according to A-B-A order lamination
2sinter 4 hours under mixed gas protected atmosphere, sintering temperature is 1300 DEG C, obtains initial billet; Carry out cold rolling to the billet sintered into, pass deformation is 5%, and total deformation is 98%, obtains the cold rolling base band that final thickness is about 100 μm; Cold rolling base band in 1200 DEG C of annealing 1h, obtains final NiW alloy composite baseband under combustion of hydrogen protective atmosphere.(111) pole, face figure on this base band top layer shows this base band and has strong twin shaft cubic texture, and extension test result illustrates that base band has good yield strength, reaches 175MPa, meets the performance requirement of NiW alloy base band.
embodiment 2
Load weighted 255g Ni powder and 45g W powder are mixed into quantitative NiW powder (code name A) by long-time ball milling, load weighted 289g Ni powder and 111g W powder are mixed into quantitative NiW powder (code name B) by long-time ball milling; Then above-mentioned powder is rolled into type respectively by directly adopting powder milling train powder; Again powder strip plate ingot is put into continuous tunnel furnace, in Ar/H according to A-B-A order lamination
2sinter 5 hours under mixed gas protected atmosphere, sintering temperature is 1200 DEG C, obtains initial billet; Carry out cold rolling to the billet sintered into, pass deformation is 5%, and total deformation is 98%, obtains the cold rolling base band that final thickness is about 100 μm; Cold rolling base band in 1200 DEG C of annealing 1.5h, obtains final NiW alloy composite baseband under combustion of hydrogen protective atmosphere.(111) pole, face figure on this base band top layer shows this base band and has strong twin shaft cubic texture, and extension test result illustrates that base band has good yield strength, reaches 183MPa, meets the performance requirement of NiW alloy base band.
embodiment 3
Load weighted 250g Ni powder and 50g W powder are mixed into quantitative NiW powder (code name A) by long-time ball milling, load weighted 297g Ni powder and 103g W powder are mixed into quantitative NiW powder (code name B) by long-time ball milling; Then above-mentioned powder is rolled into type respectively by directly adopting powder milling train powder; Again powder strip plate ingot is put into continuous tunnel furnace, in Ar/H according to A-B-A order lamination
2sinter 6 hours under mixed gas protected atmosphere, sintering temperature is 1100 DEG C, obtains initial billet; Carry out cold rolling to the billet sintered into, pass deformation is 4%, and total deformation is 99%, obtains the cold rolling base band that final thickness is about 120 μm; Cold rolling base band in 1300 DEG C of annealing 1h, obtains final NiW alloy composite baseband under combustion of hydrogen protective atmosphere.(111) pole, face figure of this base band shows this base band and has strong twin shaft cubic texture, and extension test result illustrates that base band has good yield strength, reaches 169MPa, meets the performance requirement of NiW alloy base band.
Claims (2)
1. a Ni base alloy composite baseband, is composited by top layer and sandwich layer, and the atomic percentage conc of top layer W is 3-9%, and sandwich layer W atomic percentage conc is 9-15%.
2. a preparation method for Ni base alloy composite baseband, is characterized in that the method comprises the following steps:
(1). Ni powder and W powder are uniformly mixed into NiW powder;
(2). adopted by two kinds of mixed-powders the direct powder of tilting powder milling train to roll into type respectively, obtaining W atomic percentage conc is 3-9%, generation
Number A, and W atomic percentage conc is 9-15%, code name B, the powder strip plate ingot of two kinds of different ratio;
(3). billet powder being rolled forming is placed in continuous tunnel furnace according to A-B-A powder strip plate ingot order lamination and carries out high-temperature homogenization sintering,
In Ar/H
2sinter 4-5 hour under mixed gas protected atmosphere, sintering temperature is 1000-1400 DEG C, obtains compound billet;
(4). carry out cold rolling to the compound billet be fired into, pass deformation controls to be less than 10%, and total deformation is greater than 95%, obtains
Cold rolling composite baseband eventually;
(5). by cold rolling composite baseband at Ar/H
2in 1000-1400 DEG C of annealing 0.5-3h under mixed gas protected atmosphere, obtain surface and have
The Ni base alloy composite baseband of strong twin shaft cubic texture.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118347A (en) * | 2020-02-08 | 2020-05-08 | 河南城建学院 | Preparation method of high-strength Ni-based composite baseband |
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Application publication date: 20150520 |