CN114075633B - High-thermal-conductivity corrosion-resistant CuFe alloy, plate strip and preparation method thereof - Google Patents

High-thermal-conductivity corrosion-resistant CuFe alloy, plate strip and preparation method thereof Download PDF

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CN114075633B
CN114075633B CN202111174992.6A CN202111174992A CN114075633B CN 114075633 B CN114075633 B CN 114075633B CN 202111174992 A CN202111174992 A CN 202111174992A CN 114075633 B CN114075633 B CN 114075633B
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alloy
resistant
cufe
corrosion
thermal
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CN114075633A (en
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雷前
陈小波
李周
李勇
李丽兴
叶胜蓝
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Foshan City Shunde District Jingyi Wanxi Copper Co ltd
Central South University
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Foshan City Shunde District Jingyi Wanxi Copper Co ltd
Central South University
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C9/00Alloys based on copper
    • 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
    • B21C37/02Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
    • 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • 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
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon

Abstract

The invention discloses a high-thermal-conductivity corrosion-resistant CuFe alloy which comprises the following components in percentage by mass: 0.1-5.0% of Fe0, no more than 0.1% of element M, and the balance of Cu and inevitable impurities; wherein the element M is at least 2 of Cr, Al, Ni, Sn, Si, P, Ge and V. The invention also provides a high-thermal-conductivity corrosion-resistant CuFe alloy plate strip and a preparation method thereof. According to the high-thermal-conductivity corrosion-resistant CuFe system alloy, by adding the element M, the element M and the Fe are matched and cooperated with each other, the strengthening phase in the alloy is uniformly distributed, the thermal conductivity is good, a compact oxide film is formed, and the thermal conductivity and the corrosion resistance of the alloy are good.

Description

High-thermal-conductivity corrosion-resistant CuFe alloy, plate strip and preparation method thereof
Technical Field
The invention belongs to the field of alloy materials, and particularly relates to a CuFe alloy, a plate strip and a preparation method thereof.
Background
The Cu-Fe alloy is popular in various industries due to excellent mechanical property and low price, such as ocean engineering, mobile phone heat dissipation plates, air-conditioning condenser pipes, mariculture net cages, high-voltage cables and the like. On the basis of the traditional Cu-Fe copper alloy, the design development and corrosion resistance mechanism research of the novel high heat-resistant corrosion-resistant copper alloy under the harsh service condition are developed, and the method has important significance for the basic theoretical research and the engineering application of the copper alloy for marine engineering and special environment service in China.
The solubility of Fe in copper is very low and Fe will generally be present in the Cu matrix in the form of Fe particles. The Cu-Fe alloy has two phases of Fe and Cu, the electronegativity of the two phases is different, and the two phases are easy to generate corrosion reaction under the action of galvanic couple. Furthermore, Fe (bcc) phase is very easy to generate Fe under corrosion reaction 2+ ,Fe 2+ Can react with Cu. Under the action of the two mechanisms, the corrosion resistance of the Cu-Fe alloy is weakened, and the service life of the alloy is greatly shortened. In addition, the addition of Fe affects the heat conductivity of Cu-Fe alloy, and the heat conductivity of traditional Cu-Fe copper alloy is generally poor, so it is necessary to improve the heat conductivity to meet the requirement of high heat-resistant and corrosion-resistant copper alloy.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects and shortcomings in the background art, and provide a high-heat-conductivity corrosion-resistant CuFe system alloy with excellent corrosion resistance and heat conductivity, a plate strip and a preparation method thereof. In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a high-thermal-conductivity corrosion-resistant CuFe system alloy comprises the following components in percentage by mass: 0.1-5.0% of Fe, no more than 0.1% of element M, and the balance of Cu and inevitable impurities; wherein the element M is at least 2 of Cr, Al, Ni, Sn, Si, P, Ge and V.
In the high thermal conductivity corrosion-resistant CuFe-based alloy, preferably, the mass ratio of the element M to Fe is not more than 1: 50. in the present invention, the elements M and Fe have a large influence on the exertion of their respective effects, and the present invention requires an accurate mass ratio of the two. The excessive consumption of iron is not beneficial to the improvement of the thermal conductivity and the corrosion resistance, the too small consumption of iron is too low, the strength of the alloy is too low, the consumption of the element M is too small, the improvement of the corrosion resistance is not obvious, and the excessive consumption of the element M influences the thermal conductivity of the alloy. After the elements M and Fe are added simultaneously, a combination reaction occurs between the elements M and Fe, the mutual reaction promotes the improvement of the alloy performance, and the determination of the dosage ratio of the elements M and Fe needs to consider the reaction process of the elements M and Fe.
In the above high thermal conductivity corrosion-resistant CuFe system alloy, preferably, the element M is Sn, Si, P and Ge, and the mass percentages of Sn, Si, P and Ge are 0.005-0.02%, 0.01-0.04%, 0.001-0.01% and 0.005-0.02%, respectively. More preferably, the element M is Sn, Si, P and Ge, and the mass percentages of Sn, Si, P and Ge are 0.01%, 0.03%, 0.005% and 0.01%, respectively. The addition of the element M can influence the heat conduction and corrosion resistance of the alloy on one hand, and can also carry out chemical combination reaction with Fe on the other hand to promote the strength and the electrical conductivity of the alloy. Particularly, the mass percentages of Sn, Si, P and Ge are respectively controlled to be 0.01 percent, 0.03 percent, 0.005 percent and 0.01 percent, and the self-cooperation effect and the effect of the combination reaction with iron are the best.
As a general technical concept, the invention also provides a high-thermal-conductivity corrosion-resistant CuFe alloy plate strip which is prepared from the high-thermal-conductivity corrosion-resistant CuFe alloy.
As a general technical concept, the invention also provides a preparation method of the high-thermal-conductivity corrosion-resistant CuFe alloy plate strip, which comprises the following steps:
(1) firstly, putting a copper source, an iron source and an element M into a heating furnace for melting, and forming an alloy melt after uniform melting;
(2) horizontally continuously casting the alloy melt obtained in the step (1) into a strip to obtain a cast strip;
(3) carrying out heat preservation on the cast plate strip obtained in the step (2), and then carrying out hot extrusion to obtain a hot-rolled plate blank;
(4) pickling the hot rolled plate blank obtained in the step (3), and then cold rolling to obtain a cold rolled plate strip;
(5) and (4) pickling the cold-rolled sheet strip obtained in the step (4), and then annealing to obtain the high-thermal-conductivity corrosion-resistant CuFe alloy sheet strip.
In the above preparation method, preferably, in the step (1), the melting temperature is controlled to be 1300-.
In the above preparation method, preferably, the temperature of the horizontal continuous casting is 1050-.
In the preparation method, the temperature of the heat preservation and the hot extrusion is preferably 850-950 ℃, and the hot rolling deformation is controlled to be 50-80%.
In the above production method, the cold rolling deformation is preferably controlled to 30 to 80%.
In the above preparation method, preferably, the annealing temperature is 300-.
In the high-thermal-conductivity corrosion-resistant CuFe system alloy, Fe precipitated phases are uniformly distributed in a submicron order in a copper matrix, and elements M comprise elements such as Cr, Al, Ni, Sn, Si, P, Ge, V and the like, and are mainly distributed by solute atoms or nano particles. In addition, some elements M can react with Fe to separate out alloying particles, so that a multi-element coordination strengthening phase occupying different volume fractions is separated out in the alloy, the quantity and the distribution position of the strengthening phase are increased, a good solid solution strengthening effect is achieved, and the improvement of the alloy strength is facilitated.
According to the invention, by adding the element M with less phonon thermal shock, the influence of the element M on the heat-conducting property of the alloy is small, and the influence on the heat-conducting property is reduced while the corrosion resistance is favorably improved. In addition, the element M can also be alloyed with iron to separate out iron compound particles, which is also beneficial to improving the heat-conducting property. The research shows that the addition of four elements of Sn, Si, P and Ge is more beneficial to the improvement of the heat-conducting property under the synergistic action.
In the invention, SnO can be generated by adding elements M (Sn, Si, Ge and the like), reasonably setting process steps and optimizing alloy components and process parameters 2 、SiO 2 、GeO 2 、V 2 O 5 、Cr 2 O 3 、Al 2 O 3 And oxides such as NiO and the like are compact and can block further oxidation and corrosion of the material, so that the corrosion resistance of the CuFe system alloy is remarkably improved. Particularly, by adding four elements of Sn, Si, P and Ge, the corrosion resistance of the alloy can be improved, the heat conductivity of the alloy can be considered, and the CuFe alloy with high strength, good heat conductivity and good thermal corrosion resistance can be obtained finally.
According to the preparation method of the high-thermal-conductivity corrosion-resistant CuFe alloy plate strip, the plate blank is formed by directly adopting horizontal continuous casting, so that macrosegregation can be effectively reduced, uniform distribution of Fe in Cu is promoted, and cold rolling deformation and annealing treatment are directly adopted after hot processing, so that on one hand, precipitation of a nano phase in the alloy is promoted, the grain size is small, the strength and the thermal conductivity of the alloy are improved, on the other hand, local stress concentration is reduced, and the uniformity and the corrosion resistance of the structure of the alloy are improved. The production process flow is short, the operation is simple, the production cost is low, and the method is suitable for industrial production.
Compared with the prior art, the invention has the advantages that:
1. according to the high-thermal-conductivity corrosion-resistant CuFe system alloy, the ultramicro alloying elements of the elements M (Cr, Al, Ni, Sn, Si, P, Ge and V) are added, the alloy components are reasonable, the elements M and Fe are matched and cooperated with each other, the strengthening phase in the alloy is uniformly distributed and has good thermal conductivity, a compact oxide film is formed, and the thermal conductivity and the corrosion resistance of the alloy are good. The maximum tensile strength of the high-thermal-conductivity corrosion-resistant CuFe system alloy at room temperature reaches 430MPa, the thermal conductivity coefficient reaches 350watt/m, particularly, the high-thermal-conductivity corrosion-resistant CuFe system alloy is excellent in corrosion resistance, and the corrosion rate in a 3.5% NaCl solution is 0.042 mm/a.
2. The preparation method of the high-strength high-heat-conductivity corrosion-resistant CuFe alloy plate strip is beneficial to improving the strength, the heat conductivity and the corrosion resistance of the CuFe alloy plate strip, and is short in production process flow, simple to operate, low in production cost and suitable for industrial production.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a metallographic photograph of a side-cut surface of a strip obtained after step (5) in the process of manufacturing a high-strength, high-thermal-conductivity, corrosion-resistant CuFe system alloy by the fusion casting method in example 1.
Detailed Description
In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Example 1:
the high-thermal-conductivity corrosion-resistant CuFe system alloy comprises the following components in percentage by mass: 0.1% of Fe, 0.001% of Si, 0.001% of P, 0.002% of the total content of M elements, and the mass ratio of the total mass percent of each element in the M elements to the Fe is 1: 50; the balance of Cu and inevitable impurities.
The high-thermal-conductivity corrosion-resistant CuFe alloy plate strip is prepared from the high-thermal-conductivity corrosion-resistant CuFe alloy through a fusion casting method.
The preparation method of the high-thermal-conductivity corrosion-resistant CuFe alloy plate strip comprises the following steps:
(1) preparing materials according to the weight percentage of the elements, firstly putting the proportioned raw materials into a heating furnace for melting, wherein the melting temperature is 1300 ℃, cooling to 1100 ℃ after the raw materials are completely melted, and forming an alloy melt after uniform melting;
(2) continuously casting the alloy melt obtained in the step (1) on a continuous casting machine to form a slab, controlling the casting temperature to be 1050 ℃, the casting speed to be 2.0m/h and the cooling water pressure to be 0.05MPa, and obtaining a cast ingot slab;
(3) heating the ingot casting slab obtained in the step (2) to 850 ℃, preserving heat for 1h, and carrying out hot rolling after heat preservation, wherein the rolling deformation is 50%, so as to obtain a hot rolled plate strip;
(4) pickling the hot rolled strip after the step (3), and then carrying out cold rolling, wherein the rolling deformation is 30%;
(5) and (3) pickling the plate strip after the step (4), and then annealing at the temperature of 300 ℃ for 1h to obtain the high-thermal-conductivity corrosion-resistant CuFe alloy plate strip (a metallographic photograph of a side section is shown in figure 1).
Tensile test, heat conduction test and corrosion test are carried out on the obtained high-heat-conductivity corrosion-resistant CuFe alloy plate strip, and the tensile strength, the heat conduction coefficient and the corrosion performance are shown in Table 1.
Example 2:
the high-thermal-conductivity corrosion-resistant CuFe system alloy comprises the following components in percentage by mass: 2.0% of Fe, 0.01% of Sn, 0.01% of Cr and 0.01% of Al, wherein the total content of M elements is 0.03%, and the mass ratio of the total mass percentage of each element in the M elements to the Fe is 1: 67; the balance of Cu and inevitable impurities.
The high-thermal-conductivity corrosion-resistant CuFe alloy plate strip is prepared from the high-thermal-conductivity corrosion-resistant CuFe alloy through a fusion casting method.
The preparation method of the high-thermal-conductivity corrosion-resistant CuFe system alloy comprises the following steps:
(1) preparing materials according to the weight percentage of the elements, firstly putting a copper source, an iron source, a tin source, a chromium source and an aluminum source into a heating furnace for melting, wherein the melting temperature is 1350 ℃, cooling to 1150 ℃ after the copper source, the iron source, the tin source, the chromium source and the aluminum source are completely melted, and forming an alloy melt after the copper source, the iron source, the tin source, the chromium source and the aluminum source are uniformly melted;
(2) continuously casting the alloy melt obtained in the step (1) on a continuous casting machine to form a slab, controlling the casting temperature to be 1100 ℃, the casting speed to be 2.5m/h and the cooling water pressure to be 0.1MPa, and obtaining a cast ingot slab;
(3) heating the ingot casting slab obtained in the step (2) to 880 ℃, preserving heat for 1h, and carrying out hot rolling after heat preservation, wherein the rolling deformation is 60%, so as to obtain a hot-rolled plate strip;
(4) pickling the hot rolled strip after the step (3), and then carrying out cold rolling, wherein the rolling deformation is 60%;
(5) and (5) pickling the plate strip after the step (4), and then annealing at 400 ℃ for 1.5 hours to obtain the high-heat-conductivity corrosion-resistant CuFe alloy plate strip.
Tensile test, heat conduction test and corrosion test are carried out on the obtained high-heat-conductivity corrosion-resistant CuFe system alloy plate strip, the tensile strength, the heat conductivity coefficient and the corrosion performance are shown in the table 1.
Example 3:
the high-thermal-conductivity corrosion-resistant CuFe system alloy comprises the following components in percentage by weight: 5.0% of Fe, 0.01% of Si, 0.01% of Ge, 0.02% of V, 0.02% of Ni, 0.06% of the total content of M elements, wherein the mass ratio of the total mass percent of each element in the M elements to the mass percent of Fe is 1: 83; the balance of Cu and inevitable impurities.
The high-thermal-conductivity corrosion-resistant CuFe alloy plate strip is prepared from the high-thermal-conductivity corrosion-resistant CuFe alloy through a fusion casting method.
The preparation method of the high-thermal-conductivity corrosion-resistant CuFe system alloy comprises the following steps:
(1) preparing materials according to the weight percentage of the elements, firstly putting a copper source, an iron source, a silicon source, a germanium source, a vanadium source and a nickel source into a heating furnace for melting, wherein the melting temperature is 1300 ℃, and after the materials are completely melted, uniformly melting to form an alloy melt;
(2) continuously casting the alloy melt obtained in the step (1) on a continuous casting machine to form a slab, controlling the casting temperature to 1150 ℃, the casting speed to 3.0m/h and the cooling water pressure to 0.15MPa to obtain an ingot casting slab;
(3) heating the ingot casting slab obtained in the step (2) to 900 ℃, preserving heat for 1h, and carrying out hot rolling after heat preservation, wherein the rolling deformation is 80%, so as to obtain a hot rolled plate strip;
(4) pickling the hot rolled strip after the step (3), and then carrying out cold rolling, wherein the rolling deformation is 50%;
(5) and (4) pickling the plate strip after the step (4), and then annealing at 400 ℃ for 1.5h to obtain the high-heat-conductivity corrosion-resistant CuFe alloy plate strip.
Tensile test, heat conduction test and corrosion test are carried out on the obtained high-heat-conductivity corrosion-resistant CuFe system alloy plate strip, the tensile strength, the heat conductivity coefficient and the corrosion performance are shown in the table 1.
Example 4:
the high-thermal-conductivity corrosion-resistant CuFe system alloy comprises the following components in percentage by weight: fe 5%, Sn 0.02%, Si 0.01%, P0.01%, Ge 0.01%, V0.01%, Cr 0.01%, Al 0.01%, Ni 0.01%; the total content of the M element is 0.09%, and the mass ratio of the total mass percent of the M element to the Fe is 1: 56; the balance of Cu and inevitable impurities.
The high-thermal-conductivity corrosion-resistant CuFe alloy plate strip is prepared from the high-thermal-conductivity corrosion-resistant CuFe alloy through a fusion casting method.
The preparation method of the high-thermal-conductivity corrosion-resistant CuFe system alloy comprises the following steps:
(1) preparing materials according to the weight percentage of the elements, firstly putting a copper source, an iron source, a silicon source, a vanadium source, a chromium source, a nickel source, a germanium source, a tin source, a phosphorus source and an aluminum source into a heating furnace for melting, wherein the melting temperature is 1550 ℃, cooling to 1200 ℃ after the materials are completely melted, and uniformly melting to form an alloy melt;
(2) continuously casting the alloy melt obtained in the step (1) on a continuous casting machine to obtain a slab blank, controlling the casting temperature to be 1180 ℃, the casting speed to be 2.0m/h and the cooling water pressure to be 0.18MPa, and obtaining an ingot casting slab;
(3) heating the ingot casting slab obtained in the step (2) to 900 ℃, preserving heat for 1h, and carrying out hot rolling after heat preservation, wherein the rolling deformation is 60%, so as to obtain a hot rolled plate strip;
(4) pickling the hot rolled strip after the step (3), and then carrying out cold rolling, wherein the rolling deformation is 80%;
(5) and (4) pickling the plate strip after the step (4), and then annealing at 450 ℃ for 1.0h to obtain the high-heat-conductivity corrosion-resistant CuFe alloy plate strip.
Tensile test, heat conduction test and corrosion test are carried out on the obtained high-heat-conductivity corrosion-resistant CuFe alloy plate strip, and the tensile strength, the heat conduction coefficient and the corrosion performance are shown in Table 1.
Example 5:
the high-thermal-conductivity corrosion-resistant CuFe system alloy comprises the following components in percentage by weight: fe 5%, Sn 0.01%, Si 0.03%, P0.005%, Ge 0.01%, V0.01%, Cr 0.01%, Al 0.01%, Ni 0.01%; the total content of the M element is 0.095%, and the mass ratio of the total mass percent of each element in the M element to the Fe is 1: 53; the balance of Cu and inevitable impurities.
The high thermal conductivity and corrosion resistant CuFe alloy plate strip and the preparation method thereof of the embodiment are the same as those of embodiment 4.
Tensile test, heat conduction test and corrosion test are carried out on the obtained high-heat-conductivity corrosion-resistant CuFe alloy plate strip, and the tensile strength, the heat conduction coefficient and the corrosion performance are shown in Table 1.
Example 6:
the high-thermal-conductivity corrosion-resistant CuFe system alloy comprises the following components in percentage by weight: fe 4%, Sn 0.01%, Si 0.03%, P0.005%, Ge 0.01%; the total content of the M element is 0.055%, and the mass ratio of the total mass percent of each element in the M element to the Fe is 1: 73; the balance of Cu and inevitable impurities.
The high thermal conductivity and corrosion resistant CuFe alloy plate strip and the preparation method thereof of the embodiment are the same as those of embodiment 4.
Tensile test, heat conduction test and corrosion test are carried out on the obtained high-heat-conductivity corrosion-resistant CuFe system alloy plate strip, the tensile strength, the heat conductivity coefficient and the corrosion performance are shown in the table 1.
Example 7:
the high-thermal-conductivity corrosion-resistant CuFe system alloy comprises the following components in percentage by mass: fe 4%, Sn 0.01%, Si 0.01%, P0.005%, Ge 0.005%, and the total content of M element is 0.03%, and the mass ratio of the total mass percentage of each element in M element to Fe is 1: 133; the balance of Cu and inevitable impurities.
The high thermal conductivity and corrosion resistant CuFe alloy plate strip and the preparation method thereof of the embodiment are the same as those of embodiment 4.
Tensile test, heat conduction test and corrosion test are carried out on the obtained high-heat-conductivity corrosion-resistant CuFe alloy plate strip, and the tensile strength, the heat conduction coefficient and the corrosion performance are shown in Table 1.
Comparative example 1:
the CuFe system alloy comprises the following components in percentage by weight: 8.0 percent of Fe, 0.01 percent of Sn, 0.03 percent of Si, 0.005 percent of P and 0.01 percent of Ge; the total content of the M element is 0.055%, and the mass ratio of the total mass percent of each element in the M element to the Fe is 1: 145; the balance of Cu and inevitable impurities.
The CuFe alloy sheet strip of this comparative example and the production method thereof were the same as in example 4.
Tensile test, heat conduction test and corrosion test were performed on the CuFe alloy strip obtained as described above, and the results of tensile strength, heat conductivity and corrosion performance are shown in table 1.
Comparative example 2:
the CuFe system alloy comprises the following components in percentage by weight: 5.0 percent of Fe, 0.02 percent of Sn, 0.01 percent of Si, 0.02 percent of P, 0.01 percent of Ge, 0.02 percent of V, 0.02 percent of Cr, 0.02 percent of Al and 0.02 percent of Ni; the total content of the M element is 0.14%, and the mass ratio of the total mass percent of the M element to the Fe is 1: 36; the balance of Cu and inevitable impurities.
The CuFe alloy strip and the manufacturing method thereof of the comparative example are the same as those of example 4.
Tensile test, heat conduction test and corrosion test were performed on the CuFe alloy strip obtained as described above, and the results of tensile strength, heat conductivity and corrosion performance are shown in table 1.
The mechanical properties, thermal conductivity and corrosion rate in 3.5% NaCl solution of the alloys prepared in examples 1-7 and comparative examples 1-2 were measured at room temperature, and the results are shown in Table 1.
Table 1: properties of CuFe-based alloys obtained in examples 1 to 7 and comparative examples 1 to 2
Figure BDA0003295078200000071
Figure BDA0003295078200000081
As shown in Table 1, in the examples 1-7, compared with the comparative examples 1-2, the high thermal conductivity and corrosion resistance CuFe alloy prepared by the component proportion and the preparation method of the invention has the advantages of uniform structure, higher mechanical property, and especially excellent thermal conductivity and corrosion resistance. Particularly, by controlling the dosage and the type of the element M, the effect is more outstanding, the tensile strength of the finally prepared high-thermal-conductivity corrosion-resistant CuFe system alloy plate strip is as high as 430MPa, the thermal conductivity coefficient is as high as 350watt/M, and the corrosion resistance is 0.042 mm/a.

Claims (8)

1. The high-thermal-conductivity corrosion-resistant CuFe system alloy is characterized by comprising the following components in percentage by mass: 0.1-5.0% of Fe, no more than 0.1% of element M, and the balance of Cu and inevitable impurities; wherein:
the mass ratio of the element M to the Fe is not more than 1: 50;
the element M is Sn, Si, P and Ge, and the mass percentages of the Sn, the Si, the P and the Ge are respectively 0.005-0.02%, 0.01-0.04%, 0.001-0.01% and 0.005-0.02%.
2. A high thermal conductivity corrosion-resistant CuFe alloy plate strip, which is characterized by being prepared from the high thermal conductivity corrosion-resistant CuFe alloy of claim 1.
3. The method for preparing the high-thermal-conductivity corrosion-resistant CuFe alloy plate strip according to claim 2, comprising the following steps of:
(1) firstly, putting a copper source, an iron source and an element M into a heating furnace for melting, and forming an alloy melt after melting uniformly;
(2) horizontally continuously casting the alloy melt obtained in the step (1) into a strip to obtain a cast strip;
(3) carrying out heat preservation on the cast plate strip obtained in the step (2), and then carrying out hot extrusion to obtain a hot-rolled plate blank;
(4) pickling the hot rolled plate blank obtained in the step (3), and then cold rolling to obtain a cold rolled plate strip;
(5) and (4) pickling the cold-rolled sheet strip obtained in the step (4), and then annealing to obtain the high-thermal-conductivity corrosion-resistant CuFe alloy sheet strip.
4. The method as claimed in claim 3, wherein in the step (1), the melting temperature is controlled to 1300-1600 ℃, and after the alloy is completely melted, the temperature is reduced to 1100-1200 ℃, and the alloy melt is formed after uniform melting.
5. The preparation method as claimed in claim 3, wherein the temperature of the horizontal continuous casting is 1050-.
6. The method as claimed in any one of claims 3 to 5, wherein the temperature for the heat-preservation and hot-extrusion is 850 ℃ and 950 ℃, and the hot rolling deformation is controlled to be 50-80%.
7. The production method according to any one of claims 3 to 5, wherein the cold rolling deformation is controlled to 30 to 80%.
8. The method as claimed in any one of claims 3 to 5, wherein the annealing temperature is 300 ℃ and 500 ℃ for 0.5 to 2 hours.
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