CN112080658A - Preparation method of copper-iron alloy plate strip - Google Patents

Preparation method of copper-iron alloy plate strip Download PDF

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CN112080658A
CN112080658A CN202010882809.7A CN202010882809A CN112080658A CN 112080658 A CN112080658 A CN 112080658A CN 202010882809 A CN202010882809 A CN 202010882809A CN 112080658 A CN112080658 A CN 112080658A
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copper
iron alloy
strip
plate strip
raw materials
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周斌
郭创立
王群
孙君鹏
苟锁
高斌
梁相博
梁建斌
王文斌
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Sirui Advanced Copper Alloy Co ltd
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Sirui Advanced Copper Alloy Co ltd
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making non-ferrous alloys
    • C22C1/02Making non-ferrous alloys by melting
    • C22C1/03Making non-ferrous alloys by melting using master alloys
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C9/00Alloys based on copper

Abstract

The invention discloses a preparation method of a copper-iron alloy plate strip, which comprises the following steps: the raw materials are calculated according to the mass percentage: 5-10% of Fe element and 90-95% of Cu element, selecting and weighing raw materials, and adding the raw materials into a smelting furnace for smelting to obtain a copper-iron alloy solution; cooling and casting the smelted copper-iron alloy solution by using a crystallizer to obtain a copper-iron alloy ingot; heating by adopting a gas furnace, and then hot rolling on a two-roller reversible rolling mill; milling surface defects of the hot-rolled and cogging plate on double-faced milling equipment; cold rolling the plate with the surface defects removed, and annealing in the cold rolling process to obtain a plate strip semi-finished product; rolling the plate strip semi-finished product on a finishing mill to obtain a finished product; and carrying out heat treatment on the treated semi-finished strip, and then carrying out surface cleaning to obtain the finished alloy strip. The copper-iron alloy plate strip prepared by the method has uniform structure, mechanical property can be regulated and controlled by a heat treatment mode, and the plate type and the surface quality of the plate strip are good.

Description

Preparation method of copper-iron alloy plate strip
Technical Field
The invention relates to the technical field of nonferrous alloy processing, in particular to a preparation method of a copper-iron alloy plate strip.
Background
With the wide application of high-strength and high-conductivity copper alloys in various industries, the market puts higher demands on the manufacturing cost and the service performance of the high-strength and high-conductivity copper alloys, at present, the high-conductivity and high-conductivity copper alloy materials at home and abroad mainly use copper alloys such as Cu-Ag (-Zr), Cu-Cr (-Nb) and the like, and the copper alloys mainly achieve the effects of solid solution strengthening, precipitation strengthening and the like by adding noble metals such as Ag, Zr, Cr, Nb and the like or rare metals (metals with limited yield), so as to improve the strength, the conductivity and the like of the copper alloys, but the strength, the conductivity and the like of the copper alloys are more fiercely and more severe due to uneven distribution of the noble metals and the rare metals in the earth crust and great economic significance, the current decision on resource safety at home is not limited to petroleum and natural gas, the rare metals are also increasingly located at the center of conflict between the resource-poor countries and resource-poor countries, therefore, the method is free from the dependence on rare metals, and the seeking of metal elements with rich content and low price is urgent.
Since the proportion of four elements of Fe, O, Si and Mg on the earth is almost 90% or more, Fe is the most abundant metal element on the earth, its relative cost is the lowest, and the addition of the metal element iron to copper alloys has received much attention, whereas many companies around the world have made numerous efforts to produce copper (Cu29) and iron (Fe26) alloys very early, and in 1929, 2 scholars in germany have published papers on copper-iron alloys, but until 1964, Olin Brass in the united states has applied for a copper-iron alloy manufacturing patent (C19400) containing about 3% iron, and many metal manufacturers have thereafter used it to mass-produce copper-iron alloys widely used for lead frames.
The copper-iron alloy has the unique and superior characteristics such as electromagnetic wave shielding property, elasticity, conductivity, heat dissipation property, wear resistance, antibacterial property and the like due to the properties such as conductivity, heat conductivity, ductility, elasticity and the like of copper and the properties such as wear resistance, strength, hardness, magnetism and the like of iron; the copper-iron alloy plate strip can be widely applied to the fields of manufacturing large-scale integrated circuit lead frames, electromagnetic shielding chamber wall materials, high-precision electronic control boxes, shielding coaxial cables and the like, is a key material of flexible OLED (organic light emitting diode) back plates (replacing invar alloys) of next-generation displays, and has irreparable competitiveness and market prospect.
Therefore, how to design a preparation method which has uniform plate and strip structure, adjustable mechanical property through a heat treatment mode and good plate and strip shape and surface quality is the subject of intensive research by the inventor.
Disclosure of Invention
The invention aims to provide a preparation method of a copper-iron alloy plate strip, the prepared copper-iron alloy plate strip has uniform structure, mechanical properties can be regulated and controlled through a heat treatment mode, and the plate shape and the surface quality of the plate strip are good.
In order to achieve the purpose, the invention provides a preparation method of a copper-iron alloy plate strip, which comprises the following steps:
(1) smelting: the raw materials are calculated according to the mass percentage: the percentage content of Fe element in the raw materials is 5-10%, the percentage content of Cu element in the raw materials is 90-95%, the raw materials are selected and weighed, and the raw materials are added into a smelting furnace for smelting to obtain a copper-iron alloy solution;
(2) casting: cooling and casting the smelted copper-iron alloy solution by using a crystallizer to obtain a copper-iron alloy ingot;
(3) hot rolling: heating by using a gas furnace, and then carrying out hot rolling on a two-roller reversible rolling mill;
(4) milling a surface: milling the hot-rolled and unbaked plate on double-sided milling equipment to remove surface defects with oxide scales on the surface of the hot-rolled plate;
(5) cold rolling and annealing: cold rolling the plate with the surface defects removed in the step (4), and carrying out corresponding annealing treatment in the cold rolling process to obtain a plate strip semi-finished product;
(6) finish rolling and stretch bending straightening: rolling the plate strip semi-finished product obtained in the step (5) on a finishing mill to obtain a finished product;
(7) heat treatment and cleaning: and (4) carrying out heat treatment on the semi-finished strip processed in the step (6), and cleaning the surface of the semi-finished strip after the heat treatment to obtain the finished alloy strip.
The preparation method of the copper-iron alloy plate strip comprises the step (1), wherein Fe element in the raw materials is added into a smelting furnace in a CuFe master alloy mode, and Cu element in the raw materials is added into the smelting furnace in an electrolytic copper plate mode.
The preparation method of the copper-iron alloy plate strip comprises the following steps of (1) adopting a non-vacuum intermediate frequency induction furnace as a smelting furnace, and carrying out covering, degassing and deoxidation procedures in the smelting process of the smelting furnace and matching with electromagnetic stirring to obtain a uniform copper-iron alloy solution.
The preparation method of the copper-iron alloy plate strip comprises the step (2) of cooling and casting the smelted copper-iron alloy solution at a speed of 40-100mm/min by adopting an integrated flat copper crystallizer.
The preparation method of the copper-iron alloy plate strip comprises the step (3) that the gas furnace is heated at 870 ℃ and 950 ℃ and is kept warm for 3-4 h.
The preparation method of the copper-iron alloy plate strip, disclosed by the invention, is characterized in that the milling thickness in the step (4) is controlled to be 0.8-2.0 mm.
The preparation method of the copper-iron alloy plate strip comprises the step (5) of annealing by using a bell jar furnace, wherein the annealing temperature is controlled to be 550-700 ℃, and the annealing time is 4-5 h.
The preparation method of the copper-iron alloy plate strip comprises the step (6) of adopting a 20-roller finishing mill.
The preparation method of the copper-iron alloy plate strip comprises the step (6) of carrying out stretch bending and straightening treatment after rolling by the finishing mill so as to control the plate shape.
The preparation method of the copper-iron alloy plate strip, disclosed by the invention, is characterized in that the heat treatment temperature in the step (7) is controlled to be 350-650 ℃.
After the scheme is adopted, the preparation method of the copper-iron alloy plate strip has the following beneficial effects:
1. the method comprises the following steps of smelting, casting, hot rolling, cold rolling, heat treatment and the like, so that the prepared copper-iron alloy plate strip has a uniform structure, and Fe phases are distributed on a copper matrix in a fine fibrous manner and are distributed in a direction parallel to the rolling direction;
2. the mechanical property of the plate strip prepared by the invention can be regulated and controlled by a heat treatment mode;
3. the plate and strip prepared by the invention has better plate shape and surface quality.
Drawings
FIG. 1 is a process flow diagram of a method for manufacturing a copper-iron alloy plate strip according to the present invention;
FIG. 2 is a metallographic structure diagram of a Cu-Fe alloy strip in example 1 of the present invention.
Detailed Description
An embodiment of the present invention is shown in the process flow diagram of fig. 1.
The first embodiment is as follows:
the preparation method of the copper-iron alloy plate strip comprises the following steps:
(1) smelting: the raw materials are calculated according to the mass percentage: the percentage content of Fe element in the raw materials is 5%, the percentage content of Cu element in the raw materials is 95%, the raw materials are selected and weighed, and added into a smelting furnace for smelting, wherein the Fe element is added into the smelting furnace in the form of CuFe master alloy, the Cu element in the raw materials is added into the smelting furnace in the form of an electrolytic copper plate, the smelting furnace adopts a non-vacuum intermediate frequency induction furnace, and covering, degassing and deoxidizing procedures are carried out in the smelting process of the smelting furnace and matched with electromagnetic stirring, so as to obtain a uniform copper-iron alloy solution;
(2) casting: cooling and casting the smelted copper-iron alloy solution by adopting an integrated flat copper crystallizer at the casting speed of 40mm/min to obtain a rectangular alloy cast ingot;
(3) hot rolling: heating by using a gas furnace at the heating temperature of 870 ℃, and carrying out hot rolling on a two-roller reversible rolling mill after heat preservation for 3 hours;
(4) milling a surface: milling the hot-rolled and cogging plate on double-sided milling equipment, wherein the milling thickness is controlled to be 0.8mm so as to remove surface defects such as oxide skin on the surface of the hot-rolled plate;
(5) cold rolling and annealing: cold rolling the plate with the surface defects removed, and performing corresponding annealing treatment by using a bell-jar furnace in the cold rolling process, wherein the annealing temperature is controlled at 550 ℃, and the annealing time is 4 hours, so as to obtain a semi-finished plate strip;
(6) finish rolling and stretch bending straightening: rolling the semi-finished plate strip on a 20-roll finishing mill to obtain a finished product, performing stretch bending and straightening treatment, and controlling the plate shape;
(7) heat treatment and cleaning: and (4) carrying out heat treatment on the semi-finished product strip obtained in the step (6), controlling the heat treatment temperature at 350 ℃, carrying out heat treatment for 3 hours, and carrying out surface cleaning after the heat treatment to obtain a finished product alloy strip. Referring to a metallographic structure diagram of the copper-iron alloy strip prepared in the embodiment shown in fig. 2, the prepared copper-iron alloy strip has a uniform structure, and the Fe phase is distributed in the copper matrix in a fine fibrous form and is distributed in a direction parallel to the rolling direction.
Example two:
the preparation method of the copper-iron alloy plate strip comprises the following steps:
(1) smelting: the raw materials are calculated according to the mass percentage: the percentage content of Fe element in the raw materials is 5%, the percentage content of Cu element in the raw materials is 95%, the raw materials are selected and weighed, and added into a smelting furnace for smelting, wherein the Fe element is added into the smelting furnace in the form of CuFe master alloy, the Cu element in the raw materials is added into the smelting furnace in the form of an electrolytic copper plate, the smelting furnace adopts a non-vacuum intermediate frequency induction furnace, and covering, degassing and deoxidizing procedures are carried out in the smelting process of the smelting furnace and matched with electromagnetic stirring, so as to obtain a uniform copper-iron alloy solution;
(2) casting: cooling and casting the smelted copper-iron alloy solution by adopting an integrated flat copper crystallizer at the casting speed of 80mm/min to obtain a rectangular alloy ingot;
(3) hot rolling: heating by using a gas furnace at the temperature of 900 ℃, and carrying out hot rolling on a two-roller reversible rolling mill after heat preservation for 3.5 hours;
(4) milling a surface: milling the hot-rolled and cogging plate on double-sided milling equipment, wherein the milling thickness is controlled to be 1.5mm so as to remove surface defects such as oxide skin on the surface of the hot-rolled plate;
(5) cold rolling and annealing: cold rolling the plate with the surface defects removed, and performing corresponding annealing treatment by using a bell-jar furnace in the cold rolling process, wherein the annealing temperature is controlled at 650 ℃ to obtain a semi-finished plate strip;
(6) finish rolling and stretch bending straightening: rolling the semi-finished plate strip on a 20-roll finishing mill to obtain a finished product, performing stretch bending and straightening treatment, and controlling the plate shape;
(7) heat treatment and cleaning: and (4) carrying out heat treatment on the semi-finished product strip obtained in the step (6), controlling the heat treatment temperature at 500 ℃, carrying out heat treatment for 3 hours, and carrying out surface cleaning after the heat treatment to obtain a finished product alloy strip.
Example three:
the preparation method of the copper-iron alloy plate strip comprises the following steps:
(1) smelting: the raw materials are calculated according to the mass percentage: the percentage content of Fe element in the raw materials is 5%, the percentage content of Cu element in the raw materials is 95%, the raw materials are selected and weighed, and added into a smelting furnace for smelting, wherein the Fe element is added into the smelting furnace in the form of CuFe master alloy, the Cu element in the raw materials is added into the smelting furnace in the form of an electrolytic copper plate, the smelting furnace adopts a non-vacuum intermediate frequency induction furnace, and covering, degassing and deoxidizing procedures are carried out in the smelting process of the smelting furnace and matched with electromagnetic stirring, so as to obtain a uniform copper-iron alloy solution;
(2) casting: cooling and casting the smelted copper-iron alloy solution by adopting an integrated flat copper crystallizer at the casting speed of 100mm/min to obtain a rectangular alloy ingot;
(3) hot rolling: heating by using a gas furnace at 950 ℃, and carrying out hot rolling on a two-roller reversible rolling mill after heat preservation for 4 hours;
(4) milling a surface: milling the hot-rolled and cogging plate on double-sided milling equipment, wherein the milling thickness is controlled to be 2mm so as to remove surface defects such as oxide skin on the surface of the hot-rolled plate;
(5) cold rolling and annealing: cold rolling the plate with the surface defects removed, and performing corresponding annealing treatment by using a bell-jar furnace in the cold rolling process, wherein the annealing temperature is controlled at 700 ℃ to obtain a semi-finished plate strip;
(6) finish rolling and stretch bending straightening: rolling the semi-finished plate strip on a 20-roll finishing mill to obtain a finished product, performing stretch bending and straightening treatment, and controlling the plate shape;
(7) heat treatment and cleaning: and (4) carrying out heat treatment on the semi-finished product strip obtained in the step (6), controlling the heat treatment temperature at 650 ℃, carrying out heat treatment for 3 hours, and carrying out surface cleaning after the heat treatment to obtain a finished product alloy strip.
Example four:
the preparation method of the copper-iron alloy plate strip comprises the following steps:
(1) smelting: the raw materials are calculated according to the mass percentage: the percentage content of Fe element in the raw materials is 10%, the percentage content of Cu element in the raw materials is 90%, the raw materials are selected and weighed, and added into a smelting furnace for smelting, wherein the Fe element is added into the smelting furnace in the form of CuFe master alloy, the Cu element in the raw materials is added into the smelting furnace in the form of an electrolytic copper plate, the smelting furnace adopts a non-vacuum intermediate frequency induction furnace, and covering, degassing and deoxidizing procedures are carried out in the smelting process of the smelting furnace and matched with electromagnetic stirring, so as to obtain a uniform copper-iron alloy solution;
(2) casting: cooling and casting the smelted copper-iron alloy solution by adopting an integrated flat copper crystallizer at the casting speed of 40mm/min to obtain a rectangular alloy cast ingot;
(3) hot rolling: heating by using a gas furnace at the heating temperature of 870 ℃, and carrying out hot rolling on a two-roller reversible rolling mill after heat preservation for 3 hours;
(4) milling a surface: milling the hot-rolled and cogging plate on double-sided milling equipment, wherein the milling thickness is controlled to be 0.8mm so as to remove surface defects such as oxide skin on the surface of the hot-rolled plate;
(5) cold rolling and annealing: cold rolling the plate with the surface defects removed, and performing corresponding annealing treatment by using a bell-jar furnace in the cold rolling process, wherein the annealing temperature is controlled at 550 ℃, and the annealing time is 4 hours, so as to obtain a semi-finished plate strip;
(6) finish rolling and stretch bending straightening: rolling the semi-finished plate strip on a 20-roll finishing mill to obtain a finished product, performing stretch bending and straightening treatment, and controlling the plate shape;
(7) heat treatment and cleaning: and (4) carrying out heat treatment on the semi-finished product strip obtained in the step (6), controlling the heat treatment temperature at 350 ℃, carrying out heat treatment for 3 hours, and carrying out surface cleaning after the heat treatment to obtain a finished product alloy strip.
Example five:
the preparation method of the copper-iron alloy plate strip comprises the following steps:
(1) smelting: the raw materials are calculated according to the mass percentage: the percentage content of Fe element in the raw materials is 10%, the percentage content of Cu element in the raw materials is 90%, the raw materials are selected and weighed, and added into a smelting furnace for smelting, wherein the Fe element is added into the smelting furnace in the form of CuFe master alloy, the Cu element in the raw materials is added into the smelting furnace in the form of an electrolytic copper plate, the smelting furnace adopts a non-vacuum intermediate frequency induction furnace, and covering, degassing and deoxidizing procedures are carried out in the smelting process of the smelting furnace and matched with electromagnetic stirring, so as to obtain a uniform copper-iron alloy solution;
(2) casting: cooling and casting the smelted copper-iron alloy solution by adopting an integrated flat copper crystallizer at the casting speed of 80mm/min to obtain a rectangular alloy ingot;
(3) hot rolling: heating by using a gas furnace at the temperature of 900 ℃, and carrying out hot rolling on a two-roller reversible rolling mill after heat preservation for 3.5 hours;
(4) milling a surface: milling the hot-rolled and cogging plate on double-sided milling equipment, wherein the milling thickness is controlled to be 1.5mm so as to remove surface defects such as oxide skin on the surface of the hot-rolled plate;
(5) cold rolling and annealing: cold rolling the plate with the surface defects removed, and performing corresponding annealing treatment by using a bell-jar furnace in the cold rolling process, wherein the annealing temperature is controlled at 650 ℃ to obtain a semi-finished plate strip;
(6) finish rolling and stretch bending straightening: rolling the semi-finished plate strip on a 20-roll finishing mill to obtain a finished product, performing stretch bending and straightening treatment, and controlling the plate shape;
(7) heat treatment and cleaning: and (4) carrying out heat treatment on the semi-finished product strip obtained in the step (6), controlling the heat treatment temperature at 500 ℃, carrying out heat treatment for 3 hours, and carrying out surface cleaning after the heat treatment to obtain a finished product alloy strip.
Example six:
the preparation method of the copper-iron alloy plate strip comprises the following steps:
(1) smelting: the raw materials are calculated according to the mass percentage: the percentage content of Fe element in the raw materials is 10%, the percentage content of Cu element in the raw materials is 90%, the raw materials are selected and weighed, and added into a smelting furnace for smelting, wherein the Fe element is added into the smelting furnace in the form of CuFe master alloy, the Cu element in the raw materials is added into the smelting furnace in the form of an electrolytic copper plate, the smelting furnace adopts a non-vacuum intermediate frequency induction furnace, and covering, degassing and deoxidizing procedures are carried out in the smelting process of the smelting furnace and matched with electromagnetic stirring, so as to obtain a uniform copper-iron alloy solution;
(2) casting: cooling and casting the smelted copper-iron alloy solution by adopting an integrated flat copper crystallizer at the casting speed of 100mm/min to obtain a rectangular alloy ingot;
(3) hot rolling: heating by using a gas furnace at 950 ℃, and carrying out hot rolling on a two-roller reversible rolling mill after heat preservation for 4 hours;
(4) milling a surface: milling the hot-rolled and cogging plate on double-sided milling equipment, wherein the milling thickness is controlled to be 2mm so as to remove surface defects such as oxide skin on the surface of the hot-rolled plate;
(5) cold rolling and annealing: cold rolling the plate with the surface defects removed, and performing corresponding annealing treatment by using a bell-jar furnace in the cold rolling process, wherein the annealing temperature is controlled at 700 ℃ to obtain a semi-finished plate strip;
(6) finish rolling and stretch bending straightening: rolling the semi-finished plate strip on a 20-roll finishing mill to obtain a finished product, performing stretch bending and straightening treatment, and controlling the plate shape;
(7) heat treatment and cleaning: and (4) carrying out heat treatment on the semi-finished product strip obtained in the step (6), controlling the heat treatment temperature at 650 ℃, carrying out heat treatment for 3 hours, and carrying out surface cleaning after the heat treatment to obtain a finished product alloy strip.
The mechanical property of the copper-iron alloy plate strip prepared by the six embodiments is detected, and the test result is as follows:
Figure BDA0002654635030000061
Figure BDA0002654635030000071
according to the detection, the mechanical property of the prepared plate strip can be regulated and controlled through a heat treatment mode, and the prepared plate strip has good plate shape and surface quality.
The embodiments of the present invention have been described in detail, but the description is only a preferred example of the present invention, and is not intended to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the design of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims (10)

1. The preparation method of the copper-iron alloy plate strip is characterized by comprising the following steps of:
(1) smelting: the raw materials are calculated according to the mass percentage: the percentage content of Fe element in the raw materials is 5-10%, the percentage content of Cu element in the raw materials is 90-95%, the raw materials are selected and weighed, and the raw materials are added into a smelting furnace for smelting to obtain a copper-iron alloy solution;
(2) casting: cooling and casting the smelted copper-iron alloy solution by using a crystallizer to obtain a copper-iron alloy ingot;
(3) hot rolling: heating by using a gas furnace, and then carrying out hot rolling on a two-roller reversible rolling mill;
(4) milling a surface: milling the hot-rolled and unbaked plate on double-sided milling equipment to remove surface defects with oxide scales on the surface of the hot-rolled plate;
(5) cold rolling and annealing: cold rolling the plate with the surface defects removed in the step (4), and carrying out corresponding annealing treatment in the cold rolling process to obtain a plate strip semi-finished product;
(6) finish rolling and stretch bending straightening: rolling the plate strip semi-finished product obtained in the step (5) on a finishing mill to obtain a finished product;
(7) heat treatment and cleaning: and (4) carrying out heat treatment on the semi-finished strip processed in the step (6), and cleaning the surface of the semi-finished strip after the heat treatment to obtain the finished alloy strip.
2. The method for preparing the copper-iron alloy plate strip according to claim 1, wherein the Fe element in the raw materials in the step (1) is added into a smelting furnace in the form of CuFe master alloy, and the Cu element in the raw materials is added into the smelting furnace in the form of electrolytic copper plates.
3. The method for preparing the copper-iron alloy plate strip according to claim 1, wherein the smelting furnace in the step (1) adopts a non-vacuum intermediate frequency induction furnace, and the covering, degassing and deoxidizing procedures are carried out in the smelting process of the smelting furnace and electromagnetic stirring is matched to obtain a uniform copper-iron alloy solution.
4. The method for preparing the copper-iron alloy plate strip according to claim 1, wherein the crystallizer in the step (2) is an integrated flat copper crystallizer, and the cooling casting speed of the melted copper-iron alloy solution is 40-100mm/min.
5. The method for preparing the copper-iron alloy plate strip as claimed in claim 1, wherein the gas furnace in the step (3) is heated to 870 ℃ and 950 ℃ and is kept warm for 3-4 h.
6. The method for preparing the copper-iron alloy plate strip according to claim 1, wherein the milling thickness in the step (4) is controlled to be 0.8-2.0 mm.
7. The method for preparing the copper-iron alloy plate strip as claimed in claim 1, wherein the annealing in the step (5) is performed by using a bell jar furnace, the annealing temperature is controlled to be 550-700 ℃, and the annealing time is 4-5 h.
8. The method for manufacturing a copper-iron alloy plate strip according to claim 1, wherein the finishing mill of the step (6) is a 20-roll finishing mill.
9. The method for producing a copper-iron alloy strip according to claim 1, wherein the step (6) is performed by performing stretch-bending treatment to control the strip shape after rolling by the finishing mill.
10. The method for preparing the copper-iron alloy plate strip as claimed in claim 1, wherein the heat treatment temperature in the step (7) is controlled at 350-650 ℃.
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