CN106591623A - High-temperature-resisting ferro-bronze and preparing method and application of high-temperature-resisting ferro-bronze - Google Patents
High-temperature-resisting ferro-bronze and preparing method and application of high-temperature-resisting ferro-bronze Download PDFInfo
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- CN106591623A CN106591623A CN201611102289.3A CN201611102289A CN106591623A CN 106591623 A CN106591623 A CN 106591623A CN 201611102289 A CN201611102289 A CN 201611102289A CN 106591623 A CN106591623 A CN 106591623A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/01—Alloys based on copper with aluminium as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/02—Alloys based on copper with tin as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/04—Alloys based on copper with zinc as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/10—Alloys based on copper with silicon as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing 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 high-temperature-resisting ferro-bronze. The high-temperature-resisting ferro-bronze comprises, by weight percent, 0.05%-3.0% of Fe, 0.005-0.25% of Sn, 0.01%-0.30% of P and the balance Cu and inevitable impurities. Due to the fact that the ratio and the content of elements such as Fe, Sn and P are rigidly controlled and meanwhile the precipitation amount of iron-phosphorus intermetallic compounds and tin-phosphorus intermetallic compounds in an alloy microstructure is controlled, it can be achieved that the alloy tensile strength is 450 MPa or above, the electric conductivity is 85% of the IACS or above, the hardness is 130 HV or above, meanwhile, after the situation is maintained for 5 min under the temperature of 500 DEG C, the hardness retention rate is larger than or equal to 80% of the original hardness, the good high-temperature-softening resisting performance is achieved, and the high-temperature-resisting ferro-bronze can be used for connectors and lead frame materials under the high temperature. According to the preparing method, it can be ensured that solid solution of Fe and P is achieved in a copper alloy matrix, the iron-phosphorus intermetallic compounds and the tin-phosphorus intermetallic compounds are formed by surplus Fe, P and Sn, dispersion strengthening precipitation is achieved, the alloy strength and hardness are improved, and meanwhile the electric conductivity of the high-temperature-resisting ferro-bronze is not reduced.
Description
Technical field
The present invention relates to copper alloy and its applied technical field, and in particular to a kind of resistance to softening at high temperature can be excellent, can answer
For the electronics such as various electronic connectors, adapter, lead frame, the high temperature resistant iron bronze alloy of electric utility product and its system
Preparation Method and application.
Background technology
In recent years, the semiconductor device and lead frame of electronic equipment is increasingly towards high-power, high capacity, highly integrated
Change, the direction of small size is developed, the space inside electronics and communication apparatus is less and less, integration degree more and more higher, radiating
Require more and more tighter.Corresponding LED industry, its product also progressively develops to high brightness, high-power direction, and this results in its heat release
Amount significantly increases, and such big heat deteriorates can the resin on the element whole body, vector form deforming, so as to the dimensionally stable for affecting to assemble
Property, this requires that the carrier for encapsulating must have good resistance to elevated temperatures.Therefore, its lead frame carrier for using is also required to
To high connductivity (>=60%IACS), high intensity (tensile strength >=400MPa), particularly high temperature resistant (bears 5 at a high temperature of 500 DEG C
After minute, can maintain to reach more than the 80% of original hardness) direction develops.
At present, LED industry commonly uses blaster fuse frame material for iron bronze, the conventional trade mark such as American Standard C19210, C19400, mainly
Into being grouped into Cu-Fe-P, it is possible to achieve the tensile strength of 400MPa or so, the conductivity of 60%%IACS, but heat-resisting soft
Change performance just poor, after testing, after bearing 5 minutes at a high temperature of its 500 DEG C, can remain reach original hardness 70% left
It is right.
Such as Publication No. CN105518164A, entitled copper alloy plate and its manufacture method and current-carrying part
In patent, proof stress relaxation property when disclosing a kind of electric conductivity, intensity, bendability and giving the bearing strength test of TD is excellent
Good Cu-Fe-P-Mg series copper alloy sheet materials, the copper alloy plate contains Fe:0.05～2.50%, Mg：0.03～1.00%, P：
0.01～0.20%, the content of these elements meets the Mg-1.18 (relations of P-Fe/3.6)≤0.03；(matter is measured by solid solution Mg
Amount %)/the alloy Mg contents (quality %) × 100 definition Mg Solid soluble Nbs be more than 50%, the Fe-P of more than particle diameter 50nm
The presence density of based compound is 10.00/10 μm2Hereinafter, the presence density of the Mg-P based compounds of more than particle diameter 100nm is
10.00/10 μm2Below.The main purpose of the patent is to obtain excellent electric conductivity, intensity, particularly improves bending machining
Property and the direction of deflection deformation be the Cu-Fe-P-Mg alloys of the proof stress relaxing properties of the situation of TD, but do not mention Cu-
The resistance to elevated temperatures of Fe-P-Mg alloys.
It is public and for example in patent of the lead frame of Publication No. CN105908005A, entitled LED with copper alloy lath
A kind of Cu-Fe series copper alloys lath is opened, its percentage by weight is consisted of：Fe：1.8～2.6mass%, P：0.005～
0.20mass%, Zn：0.01～0.5mass%, surplus is made up of Cu and inevitable impurity.The copper alloy can be made by Cu-
The reflectance of the plating Ag reflectance coatings that the surface of the lead frame that Fe series copper alloys lath is constituted is formed is improved, and realizes LED package
High brightness.The surface roughness of its copper alloy plate strip is：Arithmetic average roughness Ra is less than 0.06 μm, 10 average roughness
Degree RzJISLess than 0.5 μm, in the roughness curve (AFM profiles) obtained along the measurement of rolling vertical direction by atomic force microscope
50 μm of length scope trough portion area be 1.3 μm2Hereinafter, the thickness of the affected layer being made up of fine-grain on surface
Spend for less than 0.5 μm.The Zn added in the Cu-Fe series copper alloys has functions that to make the resistance to thermally strippable of solder to improve, and has
The effect of solder bonds reliability is maintained when LED package is assembled on base.
Although industry research staff has done many improvement on the basis of Cu-Fe-P, iron bronze is not solved resistance to
The low problem of hot mastication performance.Present inventor's Jing numerous studies, by Cu, Fe, Sn, P element composition and proportioning
Many experiments are carried out, discovery can be realized more than tensile strength 450MPa of iron bronze, it is more than conductivity 85%IACS, hardness
While more than 130HV, high temperature resistant softening temperature can be reached at 500 DEG C, keep 5min after, hardness conservation rate 80% with
On, compared with traditional blaster fuse frame material, meet currently to the requirement of resistance to elevated temperatures.In consideration of it, the application proposes one kind
High temperature resistant iron bronze and its preparation method and application.
The content of the invention
The technical problem to be solved is：For the resistance to elevated temperatures that current LED industry is proposed to lead frame
Require, there is provided a kind of on the basis of tensile strength, conductivity, hardness meet requirement, the excellent copper alloy of resistance to elevated temperatures, its
At 500 DEG C, keep 5min after, hardness conservation rate >=80% original hardness, be particularly applicable to various connectors, adapter,
The electronics such as lead frame, high temperature resistant iron bronze of electric utility product and its preparation method and application.
The present invention solve the technical scheme that adopted of above-mentioned technical problem for：A kind of high temperature resistant iron bronze, the iron bronze
Percentage by weight composition includes：Fe：0.05～3.0%, Sn：0.005～0.25%, P：0.01～0.30%, balance of Cu and
Inevitable impurity.
In order to realize the resistance to softening at high temperature energy of the present invention, the Fe elements of present invention addition 0.05～3.0%.Fe can be carried
High matrix strength, Fe and P are dissolved in by solid solution and Quenching Treatment and formed in Copper substrate supersaturated solid solution, then by once and
Twice Ageing Treatment, separates out ferrum phosphorus intermetallic compound, and the intermetallic compound of precipitation plays a part of dispersion-strengtherning, ferrum phosphorus gold
The presence of compound between category further improves matrix strength and hardness, while can play to carrying heavy alloyed resistance to softening at high temperature
Important effect, but excessive Fe affects very big on alloy conductivity, therefore, high temperature resistant iron bronze of the present invention controls Fe contents
0.05～3.0%.
In order to realize the high temperature resistant softening resistant performance of the present invention, 0.005～0.25% Sn elements are added in the present invention.Sn
Room temperature solubility in copper is about 1.2%, can be with Cu2Oxygen effect in O generates stannum oxide, reduces dissolving of the oxygen in copper
Degree.Sn can improve the softening temperature of oxygen-bearing copper and oxygen-free copper, while on the hot and cold processing of copper almost without impact.Sn elements pair
The distortion of lattice impact of copper is very big, therefore raising intensity and hardness effect are obvious, while Sn and p-shaped are into stannum phosphorus intermetallic
Thing, can strengthening material produce plastic deformation needed for energy, meanwhile, the potential energy needed for material forming core can be lifted, this 2 points common
Effect, improves the resistance to elevated temperatures of material.But Sn can substantially reduce the conductivity of copper alloy, therefore high temperature resistant of the present invention is ashen
Sn contents are controlled 0.005～0.25% in copper.
In order to realize the resistance to softening at high temperature energy of the present invention, 0.01～0.30% P element is added in the present invention.P element
Degasification, deoxidation can be played a part of, copper melts surface tension is reduced, the mobility of melt is improved, alloy substrate is purified.But more
It is important that P forms Cu with Cu, Fe, Sn3P, ferrum phosphorus intermetallic compound, stannum phosphorus intermetallic compound.Cu3The hardness of P-compound
Height, is remarkably improved the mechanical property of alloy.Cu3P, ferrum phosphorus intermetallic compound, stannum phosphorus intermetallic compound presence can
Intensity, the hardness of matrix are improved, while lifting the resistance to softening at high temperature energy of alloy.But P significantly reduces the conductivity of copper and heat conduction
Rate, if P content is too high, can make matrix alloy produce fragility, therefore, the P content of high temperature resistant iron bronze of the present invention is controlled 0.01
～0.30%.
Preferably, the percentage by weight of the iron bronze is constituted also including the Al and/or B that total amount is 0.0001～0.1%.
Used as the deoxidizer of copper, can add micro Al carries out deoxidation degasification to Al.The Trace Aluminum existed as impurity is solid-solution in copper, is formed
αsolidsolution, has no significant effect to the mechanical property and processing performance of copper, but reduce the electrical conductivity of copper, thermal conductivity, brazing property with
Tin plating performance etc., improves the antioxidant capacity of copper.B is hardly solid-solution in copper, but a small amount of B is beneficial to the mechanical property of copper, and right
The electrical conductivity of copper affects again less.And B can form high melting compound with the impurity lead in copper, bismuth etc., in tiny spherical matter
Point is distributed in crystal grain, crystal grain thinning.As copper deoxidizer, the B of the 0.005～0.015% of remaining can refine copper crystal grain, carry
The mechanical property and processing performance of high-copper.Further, the iron bronze percentage by weight composition also include total amount be 0.01～
1% Zn.
Preferably, the percentage by weight of the iron bronze is constituted also including the Zn that total amount is 0.01～1%.
Zn can in a large number be solid-solution in copper, and six phases of α, β, γ, δ, ε, η with certain ingredients scope are formed under solid-state.454
DEG C when, limit contents of the Zn in α phases is up to 39%.
Preferably, the iron bronze percentage by weight composition also including the Mg, Ni, Co that total amount is 0.0001～0.5%,
At least one element in Si, La and Ce.
Mg：In 485 DEG C of eutectic temperature, solid solubility of the magnesium in copper is 0.61%, and with temperature decline and drastically
Reduce, thus high (typically 2.5%～3.5%) alloy of magnesium content has precipitation-hardening to act on, but due to the second phase goes out
Existing, the processing characteristics of alloy declines to a great extent, without practical value.And the content of magnesium of the Cu-Mg alloys of practical application is less than
1%, the copper alloy such as containing 0.3～1.0% Mg is used to process electric wire.These alloys are without ageing strengthening function, Zhi Nengtong
Supercool work strengthening.Trace magnesium is declined slightly the electrical conductivity of copper, but can improve the oxidation-resistance property of copper, also has de- to copper
Oxygen is acted on.Therefore the effect of Mg is mainly the deoxidation in fusion process, it is ensured that CuO, Cu are not contained in copper alloy2O、Fe2O3Deng oxygen
Compound so that Fe, P, Sn can be sufficiently formed intermetallic compound.Meanwhile, Mg can reduce during alloy casting produce be mingled with and
The risk of bubble.
Ni infinitely dissolves in copper form the solid solution of face-centered cubic lattice.Solid alloy exists below metastable at 322 DEG C
Fixed composition-the humidity province decomposed, the size and location in the region can be by adding some alloying elements (such as Fe, Al, Sn, Co)
It is adjusted, improves the performance of alloy.
A small amount of Co and Ni can be solid-solution in Copper substrate, can to some extent refine copper crystal grain, improve its recrystallization temperature,
The illeffectss of some meltable impurity are neutralized, the high-temp plastic to improving iron bronze is beneficial.
Under room temperature, dissolubility of the Si in copper is 2%, and its precipitation strength effect is weaker, it is impossible to obtain practical application.In right amount
Si can improve the intensity and hardness of copper, do not reduce its working plasticity, but the electric conductivity and heat conductivity of copper can be significantly reduced.
Lanthanide-indueed shift is hardly solid-solution in copper, but the addition of a small amount of rare earth element, has to the mechanical property of copper
Benefit, and less is affected on the electrical conductivity of copper.Lanthanide-indueed shift can form high-melting-point chemical combination with the impurity lead in copper, bismuth etc.
Thing, is uniformly distributed in crystal grain, crystal grain thinning in tiny spherical particle, improves the high-temp plastic of iron bronze.
Preferably, containing ferrum phosphorus intermetallic compound and stannum phosphorus intermetallic compound in the microstructure of the iron bronze,
Volume percent content of the described ferrum phosphorus intermetallic compound in described microstructure is 0.03%～0.12%, described
Volume percent content of the stannum phosphorus intermetallic compound in described microstructure be 0.009%～0.012%.
Any one element in Fe, Sn, P these three elements all has reinforcing matrix, the effect of improve alloy strength, but
Fe, Sn content affects larger to conductivity, and in the present invention, Fe, Sn, P exist simultaneously, form ferrum phosphorus intermetallic compound and stannum phosphorus
Intermetallic compound, and the precipitation of ferrum phosphorus intermetallic compound and stannum phosphorus intermetallic compound, advantageously reduce the crystalline substance of Copper substrate
Lattice distort, improve the conductivity of alloy, meanwhile, present inventor by many experiments find, ferrum phosphorus intermetallic compound and
Stannum phosphorus intermetallic compound belongs to high rigidity, high abrasion, dystectic compound, and the presence of such compound is for raising alloy
Hardness, lifting alloy resistance to softening at high temperature energy are beneficial.But the content of ferrum phosphorus intermetallic compound and stannum phosphorus intermetallic compound is simultaneously
It is not that the higher the better, when both intermetallic compound contents are higher, though the intensity of alloy, hardness, resistance to softening at high temperature energy
So improve, but plasticity, conductivity decline quickly, are unfavorable for the using effect for subsequently machining and affecting the later stage, therefore, in order to reach
To preferable effect, in the microstructure of high temperature resistant iron bronze of the present invention, the volume percent content of ferrum phosphorus intermetallic compound
For 0.03%～0.12%, the volume percent content of stannum phosphorus intermetallic compound is 0.009%～0.012%.
Preferably, tensile strength >=the 450MPa of the iron bronze, conductivity >=85%IACS, hardness >=130HV.
Preferably, the iron bronze is at 500 DEG C, and after keeping 5min, hardness conservation rate >=80%.
Used as material commonly used in the art, such as C19210, C19400 are merely able to realize at 470 DEG C, after keeping 5min, firmly
Degree conservation rate >=80%, and the present invention matches somebody with somebody when content by elements such as control Fe, Sn, P, while controlling ferrum phosphorus intermetallic
The amount of precipitation of thing and stannum phosphorus intermetallic compound in alloy microstructure, it is possible to achieve at 500 DEG C, after keeping 5min, hardness
The original hardness of conservation rate >=80%.
The copper alloy plate strip that high temperature resistant iron bronze of the present invention can be processed by solid solution, Ageing Treatment, also can be processed as
Copper alloy bar line product, is widely used in electric industry product, such as electronic connector, adapter, lead frame.
The preparation method of the strip product of above-mentioned high temperature resistant iron bronze, its preparation technology flow process is：Dispensing → founding → saw
Cut → heat → hot rolling → solid solution and a Quenching Treatment → milling face → once cold rolling → time Ageing Treatment → secondary cold-rolling → secondary
Ageing Treatment → tri- time are cold rolling → and soft annealing → tetra- time are cold rolling → straightening aligning → finished product, wherein, hot-rolled temperature is 900～
950 DEG C, temperature retention time is 3～6h；Solid solubility temperature is 600～750 DEG C；The temperature of Ageing Treatment is 500～600 DEG C, is protected
The warm time is 8～9h；The temperature of secondary ageing process is 420～500 DEG C, and temperature retention time is 6～9h.
The hot-rolled temperature of the ashen copper plate/strip of high temperature resistant of the present invention is 900～950 DEG C, and temperature retention time is 3～6h；Solid solubility temperature
For 600～750 DEG C.In the range of said temperature, ferrum phosphorus intermetallic compound, Mg, B, stannum phosphorus intermetallic compound can be fully molten
In entering Copper substrate.
The temperature of Ageing Treatment of the ashen copper plate/strip of high temperature resistant of the present invention is 500～600 DEG C, temperature retention time is 8～
9h, its effect is so that precipitation partial reinforcement phase particle in super saturated solid solution, and in follow-up cold-rolled process, these particles can shape
Into substantial amounts of dislocation, for secondary ageing process solute atoms diffusion admittance is provided.
The temperature that the secondary ageing of the ashen copper plate/strip of high temperature resistant of the present invention is processed is 420～500 DEG C, temperature retention time is 6～
9h, after once cold rolling and an Ageing Treatment, without the solute atoms for separating out secondary in an ageing process
Can further separate out with the diffusion admittance that dislocation is formed in Ageing Treatment, and should separate out more completely, evenly for second.But such as
The temperature of fruit secondary ageing process is less than 420 DEG C, and second precipitation can be caused not thorough, and the solute atoms of residual can affect material
Electric conductivity；If secondary ageing treatment temperature is higher than 500 DEG C, although separate out fully, but also result in coarse grains, affect more
Dissipate reinforcing effect.
Compared with prior art, it is an advantage of the current invention that：
(1) the percentage by weight composition of high temperature resistant iron bronze of the present invention includes：Fe：0.05～3.0%, Sn：0.005～
0.25%, P：0.01～0.30%, balance of Cu and inevitable impurity；Adapter, lead frame are applied to traditional
Material is compared, the present invention by elements such as strict control Fe, Sn, P with when content, while control ferrum phosphorus intermetallic compound and
Amount of precipitation of the stannum phosphorus intermetallic compound in alloy microstructure, it is possible to achieve more than strength of alloy 450MPa, it is conductive
It is more than rate 85%IACS, it is more than hardness 130HV, meanwhile, at 500 DEG C, after keeping 5min, hardness conservation rate >=80% is original hard
Degree, with excellent resistance to softening at high temperature energy, can be satisfied with the use of high temperature lower connector, blaster fuse frame material；
(2) technological process of the preparation method of the strip product of high temperature iron bronze of the present invention is：Dispensing → founding → sawing
When → heating → hot rolling → solid solution and a Quenching Treatment → milling face → once cold rolling → time Ageing Treatment → secondary cold-rolling → secondary
Effect process → tri- cold rolling → soft annealing → tetra- time it is cold rolling → straightening aligning → finished product, wherein, hot-rolled temperature is 900～950
DEG C, temperature retention time is 3～6h；Solid solubility temperature is 600～750 DEG C；The temperature of Ageing Treatment is 500～600 DEG C, during insulation
Between be 8～9h；The temperature of secondary ageing process is 420～500 DEG C, and temperature retention time is 6～9h；Preparation method of the present invention is by solid
Molten and aging treatment process twice, and control hot-rolled temperature and temperature retention time, twice solid solubility temperature, the temperature of Ageing Treatment and guarantor
The warm time, many times of Jing is cold rolling, it can be ensured that Fe, P are solid-solution in outside copper alloy matrix, and unnecessary Fe, P and Sn formed and change between ferrum phosphorus metal
Compound and stannum phosphorus intermetallic compound, realize that dispersion-strengtherning is separated out, and while improve alloy strength, hardness, and do not reduce it
Conductivity；
(3) high temperature resistant iron bronze of the present invention can be with strip molding, it is also possible to other product form molding such as rod line, main
It is applied to the electronics such as various electronic connectors, adapter, lead frame, electric utility product.
Specific embodiment
The present invention is described in further detail with reference to embodiments.
20 embodiment alloys and 2 comparative example alloys (C19210, C19400) are have chosen, using identical preparation method
Strip product is processed as, preparation technology flow process is：Dispensing → founding → sawing → heating → hot rolling → solid solution and Quenching Treatment →
A milling face → once cold rolling → time Ageing Treatment → secondary cold-rolling → secondary ageing processes → tri- cold rolling → soft annealing → tetra-
Secondary cold rolling → straightening aligning → finished product, wherein, hot-rolled temperature is 900～950 DEG C, and temperature retention time is 3～6h；Solid solubility temperature is
600～750 DEG C；The temperature of Ageing Treatment is 500～600 DEG C, and temperature retention time is 8～9h；The temperature of secondary ageing process
For 420～500 DEG C, temperature retention time is 6～9h.Specifically processing technique is：
Dispensing → founding → sawing → heating → hot rolling (250mm × 425mm → 230mm × 428mm → 195mm × 432mm
→160mm×435mm→125mm×438mm→95mm×441mm→65mm×444mm→44mm×447mm→29mm×
450mm → 20mm × 453mm → 16mm × 456mm) → milling face → roughing (14.5mm → 9.24mm → 6.3mm → 4.3mm →
2.93mm → 2.0mm) → thick sheared edge (2.0mm × 440mm) → mono- time Ageing Treatment (550 DEG C of * are incubated 9h) → cleaning → in
Roll (2.0mm → 1.6mm → 1.18mm → 0.92mm → 0.7mm) → secondary ageing and process (480 DEG C of * are incubated 9h) → cleaning → pre-
Finish rolling (0.7mm → 0.48mm → 0.36mm → 0.28mm) → soft annealing (670 DEG C of * 59m/min) → finish rolling finished product (0.28mm
→ 0.2mm) → cleaning → straightening aligning be ashen copper sheet.
Respectively the room temperature tensile of the ashen copper sheet of testing example 1～20 and C19210, C19400 as a comparison case is strong
Degree, hardness, conductivity；Respectively in the microstructure of the iron bronze of testing example 1～20, ferrum phosphorus intermetallic compound and stannum phosphorus
The volume percent content of intermetallic compound.
20mm × the 0.2mm of the ashen copper sheet of embodiment 1～20 and C19210, C19400 as a comparison case is intercepted respectively
Used as test sample, carrying out resistance to softening at high temperature can test the small pieces of size.Test respectively each sample at 500 DEG C, protect
The high temperature hardness after 5min is held, and calculates hardness conservation rate.Wherein, hardness conservation rate is at 500 DEG C, keeps the high temperature after 5min
The ratio of hardness and room temperature original hardness.
The composition and the performance test results of embodiment 1～20 and C19210, C19400 alloy as a comparison case is shown in Table 1.
As seen from Table 1, in more than 450MPa, conductivity is in 85%IACS for the tensile strength of the iron bronze of embodiment 1～20
More than, hardness in more than 130HV, meanwhile, at 500 DEG C, keep 5min after, hardness conservation rate >=80% original hardness has
Excellent resistance to softening at high temperature energy.
Claims (10)
1. a kind of high temperature resistant iron bronze, it is characterised in that：The percentage by weight composition of the iron bronze includes：Fe：0.05～3.0%,
Sn：0.005～0.25%, P：0.01～0.30%, balance of Cu and inevitable impurity.
2. a kind of high temperature resistant iron bronze according to claim 1, it is characterised in that：The percentage by weight composition of the iron bronze
Also including the Al and/or B that total amount is 0.0001～0.1%.
3. a kind of high temperature resistant iron bronze according to claim 2, it is characterised in that：The percentage by weight composition of the iron bronze
Also including the Zn that total amount is 0.01～1%.
4. a kind of high temperature resistant iron bronze according to claim 1, it is characterised in that：The percentage by weight composition of the iron bronze
Also including the Zn that total amount is 0.01～1%.
5. a kind of high temperature resistant iron bronze according to any one of claim 1-4, it is characterised in that：The weight of the iron bronze
Percentage ratio composition is also at least one element in 0.0001～0.5% Mg, Ni, Co, Si, La and Ce including total amount.
6. a kind of high temperature resistant iron bronze according to claim 1, it is characterised in that：Contain in the microstructure of the iron bronze
Ferrum phosphorus intermetallic compound and stannum phosphorus intermetallic compound, described ferrum phosphorus intermetallic compound is in described microstructure
Volume percent content is 0.03%～0.12%, the volume hundred of described stannum phosphorus intermetallic compound in described microstructure
It is 0.009%～0.012% to divide than content.
7. a kind of high temperature resistant iron bronze according to claim 1, it is characterised in that：The tensile strength of the iron bronze >=
450MPa, conductivity >=85%IACS, hardness >=130HV.
8. a kind of high temperature resistant iron bronze according to claim 1, it is characterised in that：The iron bronze keeps at 500 DEG C
After 5min, hardness conservation rate >=80%.
9. a kind of preparation method of the strip product of the high temperature resistant iron bronze any one of claim 1-8, its feature exists
In its preparation technology flow process is：Dispensing → founding → sawing → heating → hot rolling → solid solution and Quenching Treatment → milling face → once
Cold rolling → Ageing Treatment → secondary cold-rolling → secondary ageing process → tri- cold rolling → soft annealing → tetra- time it is cold rolling → draw
Aligning → finished product, wherein, hot-rolled temperature is 900～950 DEG C, and temperature retention time is 3～6h；Solid solubility temperature is 600～750 DEG C；
The temperature of Ageing Treatment is 500～600 DEG C, and temperature retention time is 8～9h；The temperature of secondary ageing process is 420～500
DEG C, temperature retention time is 6～9h.
10. a kind of high temperature resistant iron bronze any one of claim 1-8 is in electronic connector, adapter, lead frame
In application.
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| CN201611102289.3A CN106591623B (en) | 2016-12-05 | 2016-12-05 | A kind of high temperature resistant iron bronze and its preparation method and application |
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| CN201611102289.3A CN106591623B (en) | 2016-12-05 | 2016-12-05 | A kind of high temperature resistant iron bronze and its preparation method and application |
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| CN106591623A true CN106591623A (en) | 2017-04-26 |
| CN106591623B CN106591623B (en) | 2018-04-17 |
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