WO2009098810A1 - Process for producing precipitation-hardened copper alloy strip - Google Patents
Process for producing precipitation-hardened copper alloy strip Download PDFInfo
- Publication number
- WO2009098810A1 WO2009098810A1 PCT/JP2008/070747 JP2008070747W WO2009098810A1 WO 2009098810 A1 WO2009098810 A1 WO 2009098810A1 JP 2008070747 W JP2008070747 W JP 2008070747W WO 2009098810 A1 WO2009098810 A1 WO 2009098810A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- copper alloy
- alloy strip
- heat treatment
- recovery heat
- precipitation
- Prior art date
Links
- 229910000881 Cu alloy Inorganic materials 0.000 title claims abstract description 230
- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000008569 process Effects 0.000 title claims abstract description 36
- 238000011084 recovery Methods 0.000 claims abstract description 139
- 238000010438 heat treatment Methods 0.000 claims abstract description 115
- 230000032683 aging Effects 0.000 claims abstract description 71
- 238000001556 precipitation Methods 0.000 claims abstract description 71
- 238000005097 cold rolling Methods 0.000 claims abstract description 56
- 238000005452 bending Methods 0.000 claims description 58
- 238000012545 processing Methods 0.000 claims description 56
- 238000004519 manufacturing process Methods 0.000 claims description 48
- 238000004881 precipitation hardening Methods 0.000 claims description 46
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 44
- 230000035882 stress Effects 0.000 claims description 31
- 230000007423 decrease Effects 0.000 claims description 21
- 229910052759 nickel Inorganic materials 0.000 claims description 19
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 18
- 238000005098 hot rolling Methods 0.000 claims description 18
- 239000011574 phosphorus Substances 0.000 claims description 18
- 229910052698 phosphorus Inorganic materials 0.000 claims description 18
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 17
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 12
- 239000011701 zinc Substances 0.000 claims description 12
- 229910052725 zinc Inorganic materials 0.000 claims description 12
- 230000000704 physical effect Effects 0.000 claims description 6
- 229910052796 boron Inorganic materials 0.000 claims description 2
- 230000009467 reduction Effects 0.000 abstract description 17
- JUWOETZNAMLKMG-UHFFFAOYSA-N [P].[Ni].[Cu] Chemical compound [P].[Ni].[Cu] JUWOETZNAMLKMG-UHFFFAOYSA-N 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000000137 annealing Methods 0.000 description 18
- 239000000243 solution Substances 0.000 description 16
- 238000011156 evaluation Methods 0.000 description 14
- 238000001953 recrystallisation Methods 0.000 description 13
- 238000012360 testing method Methods 0.000 description 13
- 239000000203 mixture Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 239000013078 crystal Substances 0.000 description 11
- 239000000956 alloy Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- -1 nickel-phosphorus compound Chemical class 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 5
- 238000005728 strengthening Methods 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000003610 charcoal Substances 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000007429 general method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910001096 P alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- OFNHPGDEEMZPFG-UHFFFAOYSA-N phosphanylidynenickel Chemical compound [P].[Ni] OFNHPGDEEMZPFG-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/005—Copper or its alloys
Definitions
- the present invention relates to a method for producing a precipitation hardening type copper alloy strip.
- copper alloy strips have been widely used for current-carrying members such as terminals and connectors and mechanical parts because copper alloy-based materials have excellent mechanical strength, relatively good conductivity, and are inexpensive. It was. With the recent reduction in weight of automobiles and reduction in the thickness of electrical and electronic parts, the size of current-carrying members such as terminals has been reduced. As a result, the material for forming the current-carrying member is required to be compatible with applications that require mechanical strength at a level that is difficult to achieve with conventional copper alloy strips. For such applications, precipitation hardened copper alloy strips are often used to ensure the required mechanical strength. And the request
- Patent Document 1 discloses a copper-nickel-phosphorous alloy as a copper alloy suitable for an energizing member.
- Patent Document 1 the addition of one or more of iron, chromium, manganese, and cobalt to a copper-nickel-phosphorous alloy provides excellent migration resistance, high strength, and high conductivity.
- An energizing material having improved weldability, hot rollability, and heat-resistant peelability of solder plating or tin plating is disclosed without impairing the above.
- This copper-nickel-phosphorus alloy is excellent in precipitation hardening ability as a precipitation hardening type alloy, and it is said that a conductivity of 30% IACS to 50% IACS can be obtained.
- a copper alloy ingot is cast, hot rolling is performed after chamfering, and then cold rolling and annealing pickling are repeated, and pickling is performed after final annealing at 450 ° C. for 10 hours.
- Cold rolling is performed at a processing rate of 20%.
- Patent Document 2 describes a copper alloy containing nickel and phosphorus as essential components, and has a high conductivity level of 70% IACS or higher, strength, bending workability, press punchability, and stress relaxation resistance. And a copper alloy material that simultaneously improves its anisotropy.
- the method of recrystallizing only one part by the annealing before finishing which served as the aging precipitation process is taken. Further, in Patent Document 2, the aging precipitation treatment is performed once in the intermediate processing, and the recovery heat treatment is performed only once in principle for final annealing.
- the copper alloy of Patent Document 2 has an average aspect ratio (major axis / minor axis) A of 10 or more for crystal grains in a cross section parallel to the rolling direction and the plate thickness direction, and the maximum value Amax and the minimum value Amin of the aspect ratio.
- a plate material having a ratio Amax / Amin of 1.0 to 3.0 can be manufactured.
- Patent Document 3 discloses a copper alloy suitable for a thin-walled current-carrying member and a bus bar, which simultaneously improves strength, conductivity, bending workability, and stress relaxation resistance.
- Patent Document 3 for nickel-tin-phosphorous copper alloys, precipitates are uniformly generated by solution treatment and aging precipitation treatment with a low dislocation density, and the recrystallization temperature is not raised after aging precipitation treatment.
- precipitates with high consistency are maintained in a fine and uniformly dispersed structure, and further strength improvement is obtained in combination with work hardening.
- Patent Documents 1 to 3 Even if the methods disclosed in Patent Documents 1 to 3 are used, it is difficult to obtain a copper alloy strip having a high level of characteristics in all of mechanical strength, bending workability, and conductivity.
- the method disclosed in Patent Document 1 has a low cold rolling reduction rate of about 20%, the strength of the obtained copper alloy strip does not reach 500 N / mm 2 and has a low level of mechanical strength. Only precipitation hardened copper alloy strips can be obtained.
- Patent Document 2 is recrystallized only partly by annealing before finishing which also serves as aging precipitation treatment.
- this is a manufacturing method in which the aging precipitation treatment is performed only once in the intermediate process, and the recovery heat treatment is in principle only the final annealing. Therefore, the processing rate in the cold rolling before and after the annealing before finishing disclosed here is relatively low, and the aging precipitation treatment is performed for the first time in the heat treatment before finishing.
- the strength is high, it is about 500 N / mm 2 , and only a precipitation hardening type copper alloy strip having insufficient mechanical strength can be obtained.
- the method disclosed in Patent Document 3 is a method in which a nickel-tin-phosphorous copper alloy is uniformly formed by solution treatment and aging precipitation treatment, and the temperature after aging precipitation treatment is raised to the recrystallization temperature or higher. There is no method adopted.
- the obtained copper alloy strips are set to production conditions that can confirm the formation of a recrystallized structure of 3 ⁇ m to 30 ⁇ m. That is, when the method of Patent Document 3 is used, the recrystallized grains provided in the obtained copper alloy strip are relatively large, leading to a decrease in hardness. Therefore, the amount of tin added is increased to compensate for this decrease in hardness, but the strength improvement level is still insufficient.
- the present invention has been made in view of such problems of the prior art, and an object thereof is to provide a method for producing a copper alloy strip excellent in total balance of mechanical strength, bending workability and conductivity. .
- the inventors have conceived that the above-mentioned problems can be achieved by adopting a manufacturing method using a recovery phenomenon described below for a copper-nickel-phosphorous alloy.
- the manufacturing method of the precipitation hardening type copper alloy strip according to the present invention is as follows: nickel: 0.50 wt% to 1.50 wt%, phosphorus: 0.05 wt% to 0.20 wt%, tin: 0.00 wt% to 0.04 wt%
- a method for producing a copper alloy strip containing 0.00 wt% to 0.50 wt% of zinc which includes the following steps A to C, and is characterized by strengthening using a recovery phenomenon.
- Step A A step of subjecting a copper alloy ingot to hot rolling, and thereafter performing an aging precipitation treatment to obtain an aging precipitation-treated copper alloy strip.
- Step B The copper alloy strip obtained by the step A is subjected to intermediate processing including intermediate cold rolling performed at a processing rate of 50% to 90% and intermediate recovery heat treatment applied thereafter as one unit, and recovery heat treatment A process of obtaining a finished copper alloy strip.
- Step C Precipitation hardening type in which the recovery heat-treated copper alloy strip obtained in Step B is subjected to final cold rolling at a processing rate of 20% to 95% and then subjected to final recovery heat treatment to strengthen the recovery phenomenon. The process of obtaining a copper alloy strip.
- the step B repeats the one unit of intermediate processing a plurality of times.
- the step B includes at least one of the intermediate processing of the one unit based on the Vickers hardness of the copper alloy strip before the intermediate recovery heat treatment. It is also preferable that the reduction rate of the Vickers hardness of the copper alloy strip after the recovery heat treatment is 4% to 15%.
- the step B includes subjecting the aging precipitation-treated copper alloy strip before intermediate working to cold rolling at a working rate of 50% to 90%, It is preferable to include a step of performing a secondary aging precipitation treatment in which a recrystallized structure appears to obtain a copper alloy strip that has been subjected to the secondary aging precipitation treatment.
- the final recovery heat treatment in the step C is performed based on the Vickers hardness of the copper alloy strip before the final recovery heat treatment. It is also preferable that the decrease rate of the Vickers hardness is less than 4%.
- the final recovery heat treatment in the step C is a reduction rate of the Vickers hardness of the copper alloy strip after the final recovery heat treatment with respect to the copper alloy strip before the final recovery heat treatment. It is also preferable that the content is 4% to 15%.
- the tensile strength is 500 N / mm 2 or more
- the elongation is 5% or more
- the electrical conductivity is 50% IACS or more
- bending workability and stress relaxation resistance It is also preferable to produce a copper alloy strip having a good thickness.
- a copper alloy strip having excellent bending workability and stress relaxation resistance having physical properties of tensile strength of 500 N / mm 2 or more, elongation of 5% or more, conductivity of 65% IACS or more by using a copper alloy ingot of ⁇ 10 It is also preferable to manufacture.
- the method for producing a precipitation hardening type copper alloy strip according to the present invention includes a step of hot rolling a copper-nickel-phosphorous copper alloy ingot and then aging precipitation treatment to obtain an aging precipitation treated copper alloy strip, aging precipitation A process for obtaining a recovered heat-treated copper alloy strip by subjecting the treated copper alloy strip to intermediate cold rolling and subsequent intermediate recovery heat treatment at a processing rate of 50% to 90% to obtain the recovered heat-treated copper alloy strip; It includes a step of subjecting to final cold rolling at a processing rate of 20% to 95% and then subjecting to final recovery heat treatment.
- the method for producing a precipitation hardening type copper alloy strip according to the present invention in the presence of precipitation particles formed by aging precipitation treatment, the recovery phenomenon is utilized after strengthening the mechanical strength by cold rolling, A copper alloy strip excellent in total balance of mechanical strength, bending workability, and conductivity can be produced.
- a general precipitation hardening type copper alloy strip manufacturing process after hot rolling, cold rolling and recrystallization annealing are performed one stage or two stages before the final thickness, followed by solution treatment.
- the aging precipitation treatment is performed as it is after the cold rolling or without the cold rolling.
- the final cold rolling is performed at a relatively low processing rate, and the product is finished by applying strain relief annealing.
- a relatively high mechanical strength is achieved by the solution treatment and the aging precipitation treatment.
- the work rate of the final cold rolling is further increased in order to further increase the mechanical strength, the elongation rate is lowered and the copper alloy strip having poor bending workability is obtained.
- the crystal structure of the copper alloy strip obtained through a general manufacturing process is observed in a shape in which the recrystallized grains formed by solution treatment are somewhat flattened by cold rolling. That is, the crystal grain of the copper alloy strip which is a normal product is usually formed by solution treatment, contains many twins, and the crystal grain size is usually several tens of ⁇ m.
- the method for producing a precipitation hardening type copper alloy strip according to the present invention comprises a nickel content of 0.50 wt% to 1.50 wt% and a phosphorus content of 0.05 wt% to A copper alloy strip containing 0.20 wt%, tin of 0.00 wt% to 0.04 wt%, and zinc of 0.00 wt% to 0.50 wt% is strengthened.
- the nickel-phosphorus compound is precipitated by performing the aging precipitation treatment, contributing to strengthening of the mechanical strength and at the same time suppressing recrystallization. Further, at this time, since the amount of nickel-phosphorus solid solution is decreased, the conductivity is improved. However, if nickel whose content exceeds 1.5 wt% is added simultaneously with phosphorus, hot workability is lowered, and cracking often occurs during hot rolling, which is not preferable. On the other hand, if the nickel content is less than 0.5 wt%, it is difficult to obtain sufficient strength, which is not preferable. Similarly, if the phosphorus content is less than 0.05%, it is difficult to obtain sufficient strength.
- the conductivity tends to decrease, such being undesirable.
- Tin is effective for improving the strength and may be added arbitrarily.
- the tin content exceeds 0.04%, the electric conductivity tends to decrease, which is not preferable.
- Zinc has a property of preventing delamination of a film placed in a heated state after being subjected to soldering or tin plating, and may be optionally added when necessary. However, even if zinc is added in excess of 0.5%, the effect of preventing delamination is saturated. On the other hand, it tends to decrease the conductivity, which is not preferable.
- the method for producing a precipitation hardening type copper alloy strip according to the present invention is such that nickel is 0.50 wt% to 1.50 wt%, phosphorus is 0.05 wt% to 0.20 wt%, and tin is 0.00 wt% to 0.00.
- a composition containing 04 wt% and zinc 0.00 wt% to 0.50 wt% it is suitable to select a copper alloy strip having a Ni (wt%) / P (wt%) value of 6 to 10.
- Ni (wt%) / P (wt%) is less than 6, it is not preferable because the conductivity is lowered.
- the value of Ni (wt%) / P (wt%) exceeds 10, both the strength and conductivity of the copper alloy strip tend to be low.
- At least one selected from chromium, boron, titanium, manganese, and magnesium is further added within a total range of 3% or less. You can also.
- the addition of these components is effective for improving the mechanical strength. However, when adding one or more of these elements, it is added so that the total amount becomes 0.01% or more in order to fully exert its action. On the other hand, if the total addition amount exceeds 3%, hot workability and cold workability may be deteriorated, which is not preferable.
- Other elements other than those described above are preferably controlled to be less than 0.05% as impurities. However, in order to avoid sulfur becoming a brittle copper alloy strip, it is preferable to control sulfur to 50 ppm or less.
- mold copper alloy strip strengthened using the recovery phenomenon can be manufactured by giving the process containing the process shown below with respect to the copper alloy provided with the said composition.
- it demonstrates according to a process.
- Step A is a step in which a copper alloy ingot is hot-rolled and then subjected to an aging precipitation treatment to obtain an aging precipitation-treated copper alloy strip.
- an aging precipitation treatment is performed immediately after hot rolling. That is, by performing the aging precipitation treatment immediately after the hot rolling, the nickel-phosphorus compound is uniformly deposited as a precipitate and exhibits a precipitation hardening phenomenon. And it becomes easy to aim at hardening of a copper alloy strip by a subsequent processing process. Further, since the precipitated particles suppress the movement of the crystal grain boundary, the generation of recrystallized grains is suppressed in Step B to be described later, which contributes to the generation of a fine recovery structure.
- the cumulative working rate can be increased in cold rolling up to the final product thereafter.
- the fact that the cumulative processing rate of cold rolling is large is somewhat reduced because the intermediate processing includes a recovery heat treatment, but at the same time as the work hardening amount is increased, the cells generated during the cold rolling and further at the time of recovery are increased. Can be generated finely and densely.
- normal recrystallization is not caused at all or only partly, so that the subgrain can be refined and kept in a homogenized state, and bending workability and extensibility are also good. Can be maintained.
- the ingot In hot rolling of a copper alloy ingot, first, the ingot is heated to 700 ° C. to 1000 ° C. and rolled. Since heating of the ingot before hot rolling also has the effect of dissolving nickel and phosphorus, it is more preferably set to 800 ° C. to 950 ° C. By the way, if a manufacturing method is adopted in which a solution treatment is performed in order to dissolve nickel and phosphorus after hot rolling, followed by an aging precipitation treatment, an investment in equipment for installing special equipment is required. Further, the increase in energy cost due to the solution treatment is obvious, and there is a problem in economy, which is not preferable.
- the manufacturing method which performs an aging precipitation process after hot rolling is employed, a small amount of coarse precipitates may be inevitably generated during hot rolling.
- the precipitation hardening type copper alloy strip according to the present invention has a composition, the coarse precipitates are very small even if they are generated, and the mechanical properties are not affected. That is, in the process A according to the present invention, the effect equivalent to that of the solution treatment / aging precipitation treatment is obtained only by performing the aging precipitation treatment without performing the costly solution treatment.
- step B the aging-precipitated copper alloy strip obtained in step A is subjected to intermediate processing including intermediate cold rolling applied at a processing rate of 50% to 90% and intermediate recovery heat treatment applied thereafter as a unit to recover.
- This is a step of obtaining a heat-treated copper alloy strip.
- the intermediate recovery heat treatment and the intermediate cold rolling are performed in combination. Since the cold rolling applied here is a strong process, if the copper alloy strip is cold rolled, subgrains are generated finely and densely, and the copper alloy strip becomes hard.
- the work-hardened copper alloy strip can be basically converted into a copper alloy strip having a giant crystal through three processes: a recovery process, a recrystallization process, and a process of growing crystal grains, if heated. .
- recrystallization annealing is performed. However, if heating is performed until the recrystallization process or the crystal grain growth process, the crystal grains become coarse and the hardness decreases. That is, since recrystallization annealing works in the direction of reducing the mechanical strength of the copper alloy strip, when cold rolling is performed on the copper alloy strip after the recrystallization annealing, the precipitation hardening type copper alloy of the present invention is intended. Achievement of mechanical strength enhancement becomes difficult.
- heat treatment in the recovery process is performed without causing normal recrystallization. If heat treatment in the recovery process is performed, edge cracking during cold rolling can be avoided.
- the intermediate cold rolling at the processing rate of 50% to 90% and the intermediate recovery heat treatment to be performed thereafter are used as one unit of intermediate processing, even if cold rolling is performed at the processing rate of 50% to 90%. By performing the heat treatment, it is possible to perform cold rolling at the same level of processing rate next time, and it becomes possible to perform repeated operations.
- the step B is performed at least once in one unit of intermediate processing based on the Vickers hardness of the copper alloy strip before the intermediate recovery heat treatment.
- the reduction rate of the Vickers hardness of the copper alloy strip after the recovery heat treatment is 4% to 15%.
- the decrease rate of the Vickers hardness of the copper alloy strip after the intermediate recovery heat treatment is 4% to 15%, recrystallization does not appear. And elongation rate can be secured in a well-balanced manner.
- the processing rate of the intermediate cold rolling before the intermediate recovery heat treatment is preferably set to 50% or more in order to finely and densely distribute the subgrains. More preferably, the setting is 60% or more, and even more preferably a setting exceeding 80%. However, if it is applied at a processing rate exceeding 90%, it tends to be difficult to ensure bending workability even if a recovery heat treatment is performed, which is not preferable. The fine recovery structure generated in the copper alloy strip after the intermediate recovery heat treatment hardly disappears even by subsequent cold rolling, and the growth in the recovery heat treatment is small.
- the copper alloy strip subjected to the aging precipitation treatment before intermediate processing is processed at a processing rate of 50% to A step of performing cold rolling at 90% and then performing a secondary aging precipitation treatment in which a recrystallized structure partially appears to form a copper alloy strip that has been subjected to the secondary aging precipitation treatment may be employed.
- This secondary aging precipitation treatment is preferably a mixed structure of a recovery structure and a partial recrystallized structure, and Vickers hardness can be used as an alternative index for the formation of the mixed structure.
- the Vickers hardness is 110 to 150, it can be said that a good mixed structure is provided.
- the secondary aging precipitation treatment is performed excessively, complete recrystallization occurs, and the strength of the resulting copper alloy strip becomes less than 500 N / mm 2 .
- step C the copper alloy strip that has undergone recovery heat treatment obtained in step B is finally cold-rolled at a processing rate of 20% to 95%, and then subjected to final recovery heat treatment to strengthen the copper alloy strip that has been reinforced using the recovery phenomenon. It is the process of obtaining.
- step C final cold rolling and final recovery heat treatment are performed.
- the processing rate of the final cold rolling applied to the intermediate recovery heat-treated copper alloy strip is preferably 20% or more in order to compensate for the strength reduction due to the previous intermediate recovery heat treatment.
- the strength level of the copper alloy strip after cold rolling increases as the processing rate increases.
- the processing rate of the final cold rolling exceeds 95%, it is not preferable because it becomes difficult to ensure the bending workability of the copper alloy no matter how the recovery heat treatment temperature is set. And the processing rate of the last cold rolling of the process C changes with whether priority is given to intensity
- the processing rate of the final cold rolling depends on the properties of the intermediate recovery heat-treated copper alloy strip, but if strength is given priority 40% to 95%, if workability and conductivity are given priority, before that When no recrystallized structure is generated by this heat treatment, it is preferably about 20% to 50%, and when partially recrystallized, it is preferably 40% to 85%.
- the final recovery heat treatment is usually close to what is called low-temperature annealing or strain relief annealing, and it aims to improve stress relaxation characteristics and spring limit values while suppressing the decrease in strength. .
- the change in the Vickers hardness of the copper alloy strip in the final recovery heat treatment is set in a range of 3% increase to 3% decrease compared to before the final recovery heat treatment.
- priority can be given to securing the bending workability of the precipitation hardening type copper alloy strip by adopting a recovery heat treatment in which the decrease rate of the Vickers hardness is 4% to 15%.
- low-temperature annealing may be omitted. For example, in the case of a thick plate thickness that is difficult to be continuously annealed, it is difficult to perform low-temperature annealing without applying a gusset, and thus low-temperature annealing may be omitted.
- the copper alloy raw material can be dissolved by a conventional method, and an antioxidant treatment may be performed if necessary.
- Ingot casting can be performed by die casting, continuous or semi-continuous casting.
- Hot rolling is performed by heating the ingot to 800 ° C. to 950 ° C. in order to promote the effect of solid solution promotion.
- the aging precipitation treatment can be performed at 400 ° C. to 550 ° C. for 1 hour to 10 hours.
- the recovery heat treatment is preferably performed using continuous annealing equipment at a furnace temperature of 300 ° C to 600 ° C and a plate passing time of 3 minutes or less, but using a batch furnace under conditions that meet the specified reduction range of Vickers hardness. You may carry out.
- the properties of the copper alloy strips prepared in Examples and Comparative Examples were evaluated by taking up tensile strength and elongation, 0.2% proof stress, bending workability and conductivity. In the examples, stress relaxation resistance was also evaluated. The measurement method for each evaluation item is described below.
- Bending workability The bending workability of the copper alloy strip was evaluated by a W bending test in accordance with the technical standard JCBA-T307 of the Japan Copper and Brass Association. Specifically, the W-bending test was performed in both the Good Way with the bending axis perpendicular to the rolling direction and the Bad Way with the bending axis parallel to the rolling direction.
- R / t which is an index of bending workability, was calculated using the thickness t of the test piece.
- the criteria for determining whether or not the bending workability is good is that the value of R / t is 1.0 or less that can withstand general parts processing is “good” and 0.5 or less that can withstand fine processing is “excellent”. "
- Stress relaxation resistance The stress relaxation resistance of the copper alloy strip was measured in accordance with the technical standard JCBA-T309 of the Japan Copper and Brass Association. Specifically, a bending stress equivalent to 80% of the 0.2% proof stress included in the test piece was applied, and the stress relaxation rate after 150 ° C. ⁇ 1000 hours was evaluated. The stress relaxation resistance required in automotive terminal applications where the usage environment is severe is less than 30% in terms of the stress relaxation rate obtained by this evaluation method, but is generally allowed to be practically about 35%. .
- Table 1 shown later shows the composition and processing steps related to the production conditions according to the present invention
- Table 2 shows various properties of the obtained precipitation hardening copper alloy strip.
- Example 1 a copper alloy composition containing 1.00 wt% nickel, 0.11 wt% phosphorus, 0.03 wt% tin, and 0.15 wt% zinc was used.
- materials necessary for the above component adjustment are put into a high-frequency melting furnace, a charcoal cover is melted to form a molten metal, the molten metal is poured into a mold, cast, and a thickness of 30 mm.
- An ingot of 5 kg was prepared. And this ingot was heated to 900 degreeC, and it hot-rolled and obtained the copper alloy plate of thickness 13mm. Thereafter, the copper alloy sheet was subjected to an aging precipitation treatment at 460 ° C.
- the reduction rate of the Vickers hardness by the recovery heat treatment at this time was 11% based on the Vickers hardness before the recovery heat treatment of the copper alloy plate. Then, this recovery heat-treated copper alloy plate was finally cold-rolled at a processing rate of 39% to obtain a copper alloy plate having a thickness of 0.20 mm, and a final recovery heat treatment was performed at 385 ° C. to obtain Sample A-1. The rate of decrease in Vickers hardness by this final recovery heat treatment was 1% based on the Vickers hardness of the copper alloy plate before the recovery heat treatment.
- the evaluation results of the sample A-1 are as follows: tensile strength is 618 N / mm 2 , elongation is 9.3%, Vickers hardness is 197, 0.2% proof stress is 606 N / mm 2 , The stress relaxation rate was 24% and the conductivity was 55.5% IACS.
- the minimum bending radius R at which no crack was generated in the W bending test was 0.05 mm or less on Good Way and 0.1 mm on Bad Way. Therefore, R / t, which is an index of bending workability, is 0.25 or less for Good Way and 0.50 for Bad Way.
- FIG. 1 shows a TEM observation image of Sample A-1 (0.2 mm final recovery processed product). In FIG. 1, subgrains and precipitated particles are observed.
- OIM Orientation Imaging Microscope
- Example 2 a copper alloy composition containing 0.91 wt% nickel and 0.093 wt% phosphorus was used.
- materials necessary for the above component adjustment are put into a high-frequency melting furnace, a charcoal cover is melted to form a molten metal, the molten metal is poured into a mold, cast, and a thickness of 30 mm.
- An ingot of 5 kg was prepared. And this ingot was heated to 900 degreeC, and it hot-rolled and obtained the copper alloy plate of thickness 13mm. Thereafter, the copper alloy plate was subjected to an aging precipitation treatment at 460 ° C. for 7 hours to obtain an aging precipitation-treated copper alloy plate.
- this aging-precipitated copper alloy plate was polished and then cold-rolled to obtain a copper alloy plate having a thickness of 1.80 mm. Then, the said copper alloy plate was heated at 460 degreeC, and the recovery heat processing was performed. The reduction rate of the Vickers hardness by the recovery heat treatment at this time was 2% based on the Vickers hardness before the recovery heat treatment of the copper alloy sheet. Then, the copper alloy sheet was cold-rolled again at a processing rate of 82% to obtain a copper alloy sheet having a thickness of 0.33 mm, and a recovery heat treatment was performed at 460 ° C. At this time, the decreasing rate of the Vickers hardness after the recovery heat treatment was 10% based on the Vickers hardness before the recovery heat treatment of the copper alloy sheet.
- this recovery heat-treated copper alloy plate was finally cold-rolled at a processing rate of 39% to obtain a copper alloy plate having a thickness of 0.20 mm, and a final recovery heat treatment at 380 ° C. was performed to obtain Sample A-2. .
- the decrease rate of the Vickers hardness by the final recovery heat treatment was set to 2% based on the Vickers hardness before the recovery heat treatment of the copper alloy sheet.
- the evaluation results of the sample A-2 are as follows.
- the tensile strength is 599 N / mm 2
- the elongation is 5.4%
- the Vickers hardness is 187
- the 0.2% proof stress is 585 N / mm 2
- the stress relaxation rate was 25% and the conductivity was 58.7% IACS.
- the minimum bending radius R at which no crack was generated in the W bending test was 0.05 mm or less on Good Way and 0.1 mm on Bad Way. Therefore, R / t, which is an index of bending workability, is 0.25 or less for Good Way and 0.50 for Bad Way.
- Example 3 had a copper alloy composition containing 0.91 wt% nickel, 0.098 wt% phosphorus, 0.04 wt% tin, and 0.11 wt% zinc.
- materials necessary for the above component adjustment were put into a gas furnace and melted to form a molten metal, and this molten metal was used to create a 3500 kg ingot having a thickness of 160 mm using a vertical semi-continuous casting machine. . Then, this ingot was heated to 860 ° C. and hot-rolled to obtain a copper alloy strip having a thickness of 13 mm. Thereafter, the copper alloy strip was subjected to an aging precipitation treatment at 460 ° C.
- the evaluation result of the sample A-3 is as follows.
- the tensile strength is 634 N / mm 2
- the elongation is 8.6%
- the Vickers hardness is 205
- the 0.2% proof stress is 617 N / mm 2
- the stress relaxation rate was 18%
- the conductivity was 55.4% IACS.
- the minimum bending radius R at which no crack was generated in the W bending test was 0.05 mm for Good Way and 0.2 mm for Bad Way. Therefore, R / t, which is an index of bending workability, is 0.24 for Good Way and 0.95 for Bad Way.
- Example 4 a test copper alloy sheet was sampled from the cold-rolled copper alloy strip having a thickness of 1.8 mm manufactured in Example 3 to obtain a starting material.
- the copper alloy sheet was further subjected to secondary aging precipitation treatment at 460 ° C. for 2 hours. Then, this secondary aging precipitation-treated copper alloy plate was cold-rolled at a working rate of 80% to obtain a copper alloy plate having a thickness of 0.36 mm, and a recovery heat treatment was performed at 460 ° C.
- the reduction rate of the Vickers hardness by the recovery heat treatment at this time was 6% based on the Vickers hardness of the copper alloy plate before the recovery heat treatment.
- this recovery heat-treated copper alloy plate was finally cold-rolled at a processing rate of 44% to obtain a copper alloy plate having a thickness of 0.20 mm, and a final recovery heat treatment at 440 ° C. was performed to obtain Sample A-4. .
- the reduction rate of the Vickers hardness by this final recovery heat treatment was 4% based on the Vickers hardness before the recovery heat treatment of the copper alloy sheet.
- the evaluation results of the sample A-4 are as follows.
- the tensile strength is 550 N / mm 2
- the elongation is 8.6%
- the Vickers hardness is 159
- the 0.2% proof stress is 524 N / mm 2
- the stress relaxation rate was 24%
- the conductivity was 66.8% IACS.
- the minimum bending radius R at which no crack was generated in the W bending test was 0.05 mm for Good Way and 0.1 mm for Bad Way. Therefore, R / t, which is an index of bending workability, is 0.25 for Good Way and 0.50 for Bad Way.
- Example 5 a copper alloy ingot containing 0.79 wt% nickel, 0.11 wt% phosphorus, 0.03 wt% tin and 0.14 wt% zinc was obtained in the same manner as in Example 1.
- the ingot was heated to 860 ° C. and hot-rolled to obtain a copper alloy plate having a thickness of 12 mm.
- the copper alloy sheet was subjected to aging precipitation treatment at 430 ° C. for 3 hours.
- cold rolling with a processing rate of 78% was added.
- the sample after the cold rolling had a Vickers hardness of 177.
- the sample was further subjected to an aging precipitation treatment at 430 ° C. for 3 hours.
- the Vickers hardness of the sample after this aging treatment was 126, and it was confirmed that recrystallized grains were scattered in the crystal structure. Further, the sample after the aging treatment was subjected to cold rolling at a processing rate of 62%, and further subjected to a recovery heat treatment at a temperature of 380 ° C. This recovery heat treatment increased the Vickers hardness by 1%. The final sample thus obtained has a thickness of 1.0 mm.
- Sample A-1 and sample A-2 differ in alloy composition and aging precipitation treatment time. The mechanical strength of sample A-1 exceeds that of sample A-2. However, Sample A-2 shows a higher conductivity than Sample A-1.
- Sample A-2 is considered to be due to the long aging precipitation treatment time. Moreover, it is considered that the tensile strength of A-1 is large due to the effect of containing an appropriate amount of tin.
- the tensile strength, elongation, Vickers hardness, 0.2% proof stress, electrical conductivity from intermediate cold rolling to final recovery heat treatment The characteristic transition with respect to rate is shown in Table 3.
- the tensile strength decreases, the elongation increases, and the conductivity increases.
- the tensile strength after the final recovery heat treatment is greater than the tensile strength after the intermediate recovery heat treatment. From the transition of the physical properties, it is clear that the mechanical strength of the precipitation hardening type copper alloy strip can be enhanced by utilizing the recovery phenomenon.
- Sample A-3 has the largest tensile strength among the samples of the examples. This is because the processing rate of the final cold rolling is high.
- Sample A-4 and Sample A-5 have particularly high electrical conductivity but low tensile strength. This is because the aging treatment is performed twice.
- the reason why the conductivity of Sample A-5 is the highest is considered to be that the value of Ni (wt%) / P (wt%) is appropriate. That is, the value of Ni (wt%) / P (wt%) of Sample A-5 is 7.2, whereas Ni (wt%) / P (wt%) of Sample A-1 to Sample A-4 ) Is between 9.1 and 9.8.
- the stress relaxation rate is 24% for sample A-1, 25% for sample A-2, 18% for sample A-3, 24% for sample A-4, and 31% for sample A-5. Is shown.
- the stress relaxation rate is usually 35% or less.
- the Bad Way bending R / t was 0.50 for sample A-1, 0.50 for sample A-2, 0.95 for sample A-3, and 0. 5 for sample A-1.
- the sample A-3 having a Vickers hardness of 205 and the sample A-5 having a large sample thickness are slightly inferior, but are generally good.
- Sample B-1 prepared in Comparative Example 1 had a copper alloy composition containing 1.90 wt% nickel, 0.098 wt% phosphorus, 0.04 wt% tin, and 0.11 wt% zinc.
- materials necessary for the above component adjustment are put into a high-frequency melting furnace, a charcoal cover is melted to form a molten metal, the molten metal is poured into a mold, cast, and a thickness of 30 mm.
- An ingot of 5 kg was prepared. However, since this crack was generated when this ingot was heated to 900 ° C. and the thickness was changed to 13 mm by hot rolling, the subsequent test was stopped.
- Comparative Example 2 In Comparative Example 2, the hot-rolled copper alloy plate prepared in Example 3 was used as a starting material. Thereafter, the copper alloy plate was cold-rolled to obtain a copper alloy plate having a thickness of 1.80 mm. This copper alloy plate was heated at 460 ° C. and subjected to recovery heat treatment. The reduction rate of the Vickers hardness by the recovery heat treatment at this time was 4% based on the Vickers hardness of the copper alloy plate before the recovery heat treatment. Further, this recovery heat-treated copper alloy sheet was cold-rolled to a thickness of 0.60 mm at a processing rate of 67%, subjected to solution treatment at 850 ° C., and subjected to aging precipitation at 460 ° C. for 4 hours.
- this aging-precipitated copper alloy sheet was cold-rolled to a thickness of 0.45 mm at a working rate of 25%, and subjected to recovery heat treatment at 380 ° C. to obtain Sample B-2.
- the temperature is set so that the decrease rate of the Vickers hardness before and after the recovery heat treatment by the recovery heat treatment at this time is about ⁇ 1%.
- the evaluation results of the sample B-2 are as follows.
- the tensile strength is 441 N / mm 2
- the elongation is 3.0%
- the Vickers hardness is 152
- the 0.2% proof stress is 426 N / mm 2
- the conductivity was 61.8% IACS.
- the minimum bending radius R at which no crack was generated in the W bending test was 0.30 mm for Good Way and 0.20 mm for Bad Way. Accordingly, R / t, which is an index of bending workability, is 0.67 for Good Way and 0.44 for Bad Way.
- Comparative Example 3 In Comparative Example 3, similar to Comparative Example 2, the hot-rolled copper alloy plate having a thickness of 13 mm prepared in Example 3 was used as a starting material. And after cold-rolling this copper alloy plate to thickness 2.50mm, the solution treatment was performed at 790 degreeC, and the aging precipitation process was performed at 430 degreeC for 16 hours. Further thereafter, this aging-precipitated copper alloy plate was cold-rolled to a thickness of 0.75 mm at a processing rate of 70% and subjected to a recovery heat treatment at 460 ° C. At this time, the decreasing rate of the Vickers hardness after the recovery heat treatment was 3% on the basis of the Vickers hardness before the recovery heat treatment of the copper alloy sheet.
- the copper alloy plate after the recovery heat treatment was cold-rolled at a working rate of 47% to a thickness of 0.40 mm, and the recovery heat treatment was performed at 460 ° C.
- the decreasing rate of the Vickers hardness after the recovery heat treatment was 2% on the basis of the Vickers hardness before the recovery heat treatment of the copper alloy sheet.
- this recovery heat-treated copper alloy sheet was cold-rolled to a thickness of 0.20 mm at a processing rate of 50%, heated at 385 ° C., and subjected to recovery heat treatment to obtain Sample B-3. Note that the temperature is set so that the decrease rate of the Vickers hardness before and after the recovery heat treatment by the recovery heat treatment at this time is approximately ⁇ 3%.
- the evaluation results of the sample B-3 are as follows.
- the tensile strength is 612 N / mm 2
- the elongation is 4.4%
- the Vickers hardness is 198
- the 0.2% proof stress is 601 N / mm 2
- the conductivity was 58.6% IACS.
- the minimum bending radius R at which no crack was generated in the W bending test was 0.05 mm or less on Good Way, and exceeded 0.20 mm on Bad Way. Therefore, R / t, which is an index of bending workability, is 0.25 or less for Good Way and is over 1.00 for Bad Way.
- Sample B-1 was cracked when subjected to hot rolling, and characteristic data could not be obtained. This crack is considered to be caused by the generation of a low melting point compound containing nickel and phosphorus when the nickel content increases.
- Sample B-2 was manufactured in accordance with the normal aging precipitation alloy manufacturing process after the second cold rolling. The working rate in the final cold rolling after the aging / aging precipitation treatment is slightly increased. Although the conductivity of Sample B-2 is high, the tensile strength is small and the elongation is low. However, the bending workability of sample B-2 is R / t of 0.67, and excellent bending workability is not obtained despite the low mechanical strength. It cannot be said that it is a copper alloy strip having a balance of.
- Sample B-3 was subjected to intermediate and final recovery heat treatment three times in total, but the decrease rate of Vickers hardness by recovery heat treatment was less than 4% in all cases Yes, the processing rate in cold rolling before recovery heat treatment is all low. For this reason, it is considered that Sample B-3 does not have an effect that is satisfactory in elongation and bending workability as compared with the sample of Example. In addition, the bending workability of Sample B-3 is clearly inferior to that of the sample of Example, with R / t exceeding 1.0.
- Table 4 shows the changes in physical properties when normal solution treatment / aging precipitation is performed. As is apparent from Table 4, the tensile strength after the solution treatment / aging precipitation treatment does not show a satisfactory value. From this result, for the copper alloy strip having the same alloy composition as the precipitation hardening type copper alloy strip according to the present invention, the purpose of strengthening the mechanical strength is achieved even if the aging precipitation phenomenon is used as usual. It can be seen that it is difficult to obtain necessary and sufficient characteristics.
- the method for producing a precipitation hardening type copper alloy strip according to the present invention includes a step of hot rolling a copper-nickel-phosphorous copper alloy ingot and then aging precipitation treatment to obtain an aging precipitation treated copper alloy strip, aging precipitation A process for obtaining a recovered heat-treated copper alloy strip by subjecting the treated copper alloy strip to intermediate cold rolling and subsequent intermediate recovery heat treatment at a processing rate of 50% to 90% to obtain the recovered heat-treated copper alloy strip; It includes a step of subjecting to final cold rolling at a processing rate of 20% to 95% and then subjecting to final recovery heat treatment.
- the precipitation hardening type copper alloy strip manufacturing method according to the present invention is used, the recovery phenomenon is utilized after strengthening the mechanical strength by cold rolling in the presence of precipitation particles formed by aging precipitation treatment. Therefore, it is possible to produce a copper alloy strip excellent in the total balance of mechanical strength, bending workability, and conductivity. Further, the electrical conductivity can be further improved by adding an aging precipitation treatment to the intermediate processing.
- 4 is a TEM observation photograph ( ⁇ 20000) of the surface of Sample A-1 according to the present invention. 4 is an EBSP observation photograph ( ⁇ 1500) of the surface of Sample A-1 according to the present invention.
Abstract
Description
工程B: 工程Aで得られた時効析出処理済み銅合金条に、加工率50%~90%で施す中間冷間圧延とその後施す中間回復熱処理とを1単位として含む中間加工を施し、回復熱処理済み銅合金条を得る工程。
工程C: 工程Bで得られた回復熱処理済み銅合金条に、加工率20%~95%で最終冷間圧延を施し、その後最終回復熱処理を施して回復現象を利用して強化した析出硬化型銅合金条を得る工程。 Step A: A step of subjecting a copper alloy ingot to hot rolling, and thereafter performing an aging precipitation treatment to obtain an aging precipitation-treated copper alloy strip.
Step B: The copper alloy strip obtained by the step A is subjected to intermediate processing including intermediate cold rolling performed at a processing rate of 50% to 90% and intermediate recovery heat treatment applied thereafter as one unit, and recovery heat treatment A process of obtaining a finished copper alloy strip.
Step C: Precipitation hardening type in which the recovery heat-treated copper alloy strip obtained in Step B is subjected to final cold rolling at a processing rate of 20% to 95% and then subjected to final recovery heat treatment to strengthen the recovery phenomenon. The process of obtaining a copper alloy strip.
工程Aは、銅合金インゴットを熱間圧延し、その後時効析出処理して時効析出処理済み銅合金条を得る工程である。工程Aでは、熱間圧延直後に時効析出処理を行う。即ち、時効析出処理を熱間圧延直後に行うことにより、ニッケル-リン化合物が析出物として均質に析出し、析出硬化現象を発揮する。そして、その後の加工工程で銅合金条の硬化を図ることが容易になる。また、析出粒子は結晶粒界の移動を抑制するので、後述する工程Bにおいて、再結晶粒の発生を抑制し、微細な回復組織の生成に寄与する。更に、工程Aで熱間圧延を施せば、これ以降最終製品までの冷間圧延において、累積加工率を高く取ることができる。冷間圧延の累積加工率が大きいことは、中間加工が回復熱処理を含むことで若干の目減りは出るが、加工硬化量を増大させると同時に冷間圧延の際に生じるセル、更には回復の際に生じるサブグレインを微細に、且つ、密に発生させることができる。本件発明に係る製造方法によれば、通常の再結晶をまったく又は一部しか起こさせないため、サブグレインを微細化し、且つ、均質化した状態に保つことができ、曲げ加工性や伸び性も良好に維持することができる。 <Process A>
Step A is a step in which a copper alloy ingot is hot-rolled and then subjected to an aging precipitation treatment to obtain an aging precipitation-treated copper alloy strip. In step A, an aging precipitation treatment is performed immediately after hot rolling. That is, by performing the aging precipitation treatment immediately after the hot rolling, the nickel-phosphorus compound is uniformly deposited as a precipitate and exhibits a precipitation hardening phenomenon. And it becomes easy to aim at hardening of a copper alloy strip by a subsequent processing process. Further, since the precipitated particles suppress the movement of the crystal grain boundary, the generation of recrystallized grains is suppressed in Step B to be described later, which contributes to the generation of a fine recovery structure. Furthermore, if hot rolling is performed in step A, the cumulative working rate can be increased in cold rolling up to the final product thereafter. The fact that the cumulative processing rate of cold rolling is large is somewhat reduced because the intermediate processing includes a recovery heat treatment, but at the same time as the work hardening amount is increased, the cells generated during the cold rolling and further at the time of recovery are increased. Can be generated finely and densely. According to the production method of the present invention, normal recrystallization is not caused at all or only partly, so that the subgrain can be refined and kept in a homogenized state, and bending workability and extensibility are also good. Can be maintained.
工程Bは、工程Aで得られた時効析出処理済み銅合金条を、加工率50%~90%で施す中間冷間圧延とその後施す中間回復熱処理とを1単位として含む中間加工を施し、回復熱処理済み銅合金条を得る工程である。このように、工程Bでは中間回復熱処理と中間冷間圧延とを組み合わせて行う。ここで施す冷間圧延は、強加工であるため、銅合金条に冷間圧延を施せば、サブグレインが細かく密に発生し、銅合金条は硬くなる。ここで加工硬化した銅合金条は、基本的には加熱すれば、回復過程、再結晶過程、結晶粒が成長する過程の3つの過程を経て、巨晶を備える銅合金条とすることができる。そして、一般的な工程では、再結晶焼鈍を行う。しかし、再結晶過程や結晶粒の成長過程に至るまでの加熱を行うと結晶粒が粗大化し、硬度が低下する。即ち、再結晶焼鈍は銅合金条の機械的強度を低下させる方向に働くため、再結晶焼鈍上がりの銅合金条に冷間圧延を施すと、本件発明が目的とする、析出硬化型銅合金の機械強度強化の達成が困難になる。 <Process B>
In step B, the aging-precipitated copper alloy strip obtained in step A is subjected to intermediate processing including intermediate cold rolling applied at a processing rate of 50% to 90% and intermediate recovery heat treatment applied thereafter as a unit to recover. This is a step of obtaining a heat-treated copper alloy strip. As described above, in the process B, the intermediate recovery heat treatment and the intermediate cold rolling are performed in combination. Since the cold rolling applied here is a strong process, if the copper alloy strip is cold rolled, subgrains are generated finely and densely, and the copper alloy strip becomes hard. Here, the work-hardened copper alloy strip can be basically converted into a copper alloy strip having a giant crystal through three processes: a recovery process, a recrystallization process, and a process of growing crystal grains, if heated. . And in a general process, recrystallization annealing is performed. However, if heating is performed until the recrystallization process or the crystal grain growth process, the crystal grains become coarse and the hardness decreases. That is, since recrystallization annealing works in the direction of reducing the mechanical strength of the copper alloy strip, when cold rolling is performed on the copper alloy strip after the recrystallization annealing, the precipitation hardening type copper alloy of the present invention is intended. Achievement of mechanical strength enhancement becomes difficult.
工程Cは、工程Bで得られた回復熱処理済み銅合金条を加工率20%~95%で最終冷間圧延し、その後、最終回復熱処理を行って回復現象を利用して強化した銅合金条を得る工程である。工程Cでは、最終冷間圧延と最終回復熱処理とを施す。前記中間回復熱処理済み銅合金条に施す最終冷間圧延の加工率は、その前の中間回復熱処理による強度低下を補う意味でも20%以上が好ましい。そして、加工率を高く取るほど冷間圧延後の銅合金条の強度レベルが上がる。しかし、最終冷間圧延の加工率が95%を超えると、回復熱処理の温度をどのように設定しても銅合金の曲げ加工性の確保が難しくなるため好ましくない。そして、工程Cの最終冷間圧延の加工率は、最終的に得る銅合金条の特性として、強度を優先するか、加工性や導電率を優先するかによって異なる。最終冷間圧延の加工率は、中間回復熱処理済み銅合金条の特性にもよるが、強度を優先するのであれば40%~95%、加工性や導電率を優先するのであれば、その前の熱処理で再結晶組織を発生させない場合は20%~50%程度、一部再結晶させる場合は40%~85%とするのが望ましい。そして、最終回復熱処理は通常は低温焼鈍ないし歪とり焼鈍と称されているものに近く、強度の低下を押さえた上で、応力緩和特性の向上とばね限界値の向上を図ることを目的としている。そして、最終回復熱処理における銅合金条のビッカース硬度の変化は、最終回復熱処理前に比べ3%の上昇から3%の減少の範囲となるようにする。ただし、当該ビッカース硬度の低下率が4%~15%となる回復熱処理を採用して、析出硬化型銅合金条の曲げ加工性の確保を優先することもできる。なお、用途に応じて、応力緩和率の向上、ばね限界値の向上が不要である場合には、低温焼鈍を省いても良い。例えば、連続焼鈍が困難な厚い板厚の場合は、まきぐせをつけずに低温焼鈍することが困難であるため、低温焼鈍を省くことがある。 <Process C>
In step C, the copper alloy strip that has undergone recovery heat treatment obtained in step B is finally cold-rolled at a processing rate of 20% to 95%, and then subjected to final recovery heat treatment to strengthen the copper alloy strip that has been reinforced using the recovery phenomenon. It is the process of obtaining. In step C, final cold rolling and final recovery heat treatment are performed. The processing rate of the final cold rolling applied to the intermediate recovery heat-treated copper alloy strip is preferably 20% or more in order to compensate for the strength reduction due to the previous intermediate recovery heat treatment. And the strength level of the copper alloy strip after cold rolling increases as the processing rate increases. However, if the processing rate of the final cold rolling exceeds 95%, it is not preferable because it becomes difficult to ensure the bending workability of the copper alloy no matter how the recovery heat treatment temperature is set. And the processing rate of the last cold rolling of the process C changes with whether priority is given to intensity | strength or workability and electrical conductivity as a characteristic of the copper alloy strip finally obtained. The processing rate of the final cold rolling depends on the properties of the intermediate recovery heat-treated copper alloy strip, but if strength is given priority 40% to 95%, if workability and conductivity are given priority, before that When no recrystallized structure is generated by this heat treatment, it is preferably about 20% to 50%, and when partially recrystallized, it is preferably 40% to 85%. The final recovery heat treatment is usually close to what is called low-temperature annealing or strain relief annealing, and it aims to improve stress relaxation characteristics and spring limit values while suppressing the decrease in strength. . Then, the change in the Vickers hardness of the copper alloy strip in the final recovery heat treatment is set in a range of 3% increase to 3% decrease compared to before the final recovery heat treatment. However, priority can be given to securing the bending workability of the precipitation hardening type copper alloy strip by adopting a recovery heat treatment in which the decrease rate of the Vickers hardness is 4% to 15%. Depending on the application, if it is not necessary to improve the stress relaxation rate and the spring limit value, low-temperature annealing may be omitted. For example, in the case of a thick plate thickness that is difficult to be continuously annealed, it is difficult to perform low-temperature annealing without applying a gusset, and thus low-temperature annealing may be omitted.
ここで、表2のデータを参照しつつ、実施例同士を対比する。 <Contrast between Examples>
Here, examples are compared with reference to the data in Table 2.
比較例1で作成する試料B-1は、ニッケルを1.90wt%、リンを0.098wt%、スズを0.04wt%、亜鉛を0.11wt%含む銅合金組成とした。当該試料を作成するにあたり、まず、上記成分調整に必要な材料を高周波溶解炉に投入し、木炭カバーをして溶解して溶湯とし、この溶湯を金型に流し込んで鋳造し、厚さ30mmのインゴット5kgを作成した。しかし、その後、このインゴットを900℃に加熱し、熱間圧延により厚みを13mmにする際に、ワレが発生したため、その後の試験は中止した。 [Comparative Example 1]
Sample B-1 prepared in Comparative Example 1 had a copper alloy composition containing 1.90 wt% nickel, 0.098 wt% phosphorus, 0.04 wt% tin, and 0.11 wt% zinc. In preparing the sample, first, materials necessary for the above component adjustment are put into a high-frequency melting furnace, a charcoal cover is melted to form a molten metal, the molten metal is poured into a mold, cast, and a thickness of 30 mm. An ingot of 5 kg was prepared. However, since this crack was generated when this ingot was heated to 900 ° C. and the thickness was changed to 13 mm by hot rolling, the subsequent test was stopped.
比較例2では、実施例3で作成した熱間圧延上がりの銅合金板を出発材料として用いた。その後、当該銅合金板に、冷間圧延を施して厚さ1.80mmの銅合金板を得た。この銅合金板を460℃で加熱し、回復熱処理を行った。このときの回復熱処理によるビッカース硬度の低下率は、当該銅合金板の回復熱処理前のビッカース硬度を基準として4%とした。更に、この回復熱処理済みの銅合金板を厚さ0.60mmまで加工率67%で冷間圧延後、850℃で溶体化処理を施し、460℃で時効析出処理を4時間行った。更にその後、この時効析出処理済み銅合金板を、厚さ0.45mmまで加工率25%で冷間圧延を施し、380℃で回復熱処理を施して試料B-2を得た。なお、このときの回復熱処理による回復熱処理前後のビッカース硬度の低下率がほぼ-1%となるように設定した温度である。 [Comparative Example 2]
In Comparative Example 2, the hot-rolled copper alloy plate prepared in Example 3 was used as a starting material. Thereafter, the copper alloy plate was cold-rolled to obtain a copper alloy plate having a thickness of 1.80 mm. This copper alloy plate was heated at 460 ° C. and subjected to recovery heat treatment. The reduction rate of the Vickers hardness by the recovery heat treatment at this time was 4% based on the Vickers hardness of the copper alloy plate before the recovery heat treatment. Further, this recovery heat-treated copper alloy sheet was cold-rolled to a thickness of 0.60 mm at a processing rate of 67%, subjected to solution treatment at 850 ° C., and subjected to aging precipitation at 460 ° C. for 4 hours. Further thereafter, this aging-precipitated copper alloy sheet was cold-rolled to a thickness of 0.45 mm at a working rate of 25%, and subjected to recovery heat treatment at 380 ° C. to obtain Sample B-2. Note that the temperature is set so that the decrease rate of the Vickers hardness before and after the recovery heat treatment by the recovery heat treatment at this time is about −1%.
比較例3では、比較例2と同様、実施例3で作成した熱間圧延上がりの厚さ13mmの銅合金板を出発材料として用いた。そして、この銅合金板を厚さ2.50mmまで冷間圧延後、790℃で溶体化処理を施し、430℃で時効析出処理を16時間行った。更にその後、この時効析出処理済み銅合金板を、厚さ0.75mmまで加工率70%で冷間圧延を施し、460℃で回復熱処理を行った。このとき、回復熱処理後のビッカース硬度の低下率は、当該銅合金板の回復熱処理前のビッカース硬度を基準として3%であった。更に、当該回復熱処理済み銅合金板を、厚さ0.40mmまで加工率47%で冷間圧延を施し、460℃で回復熱処理を行った。このとき、回復熱処理後のビッカース硬度の低下率は、当該銅合金板の回復熱処理前のビッカース硬度を基準として2%であった。更に、この回復熱処理済み銅合金板を、厚さ0.20mmまで加工率50%で冷間圧延を施し、385℃で加熱し、回復熱処理を施して試料B-3を得た。なお、このときの回復熱処理による当該回復熱処理前後のビッカース硬度の低下率がほぼ-3%になるように設定した温度である。 [Comparative Example 3]
In Comparative Example 3, similar to Comparative Example 2, the hot-rolled copper alloy plate having a thickness of 13 mm prepared in Example 3 was used as a starting material. And after cold-rolling this copper alloy plate to thickness 2.50mm, the solution treatment was performed at 790 degreeC, and the aging precipitation process was performed at 430 degreeC for 16 hours. Further thereafter, this aging-precipitated copper alloy plate was cold-rolled to a thickness of 0.75 mm at a processing rate of 70% and subjected to a recovery heat treatment at 460 ° C. At this time, the decreasing rate of the Vickers hardness after the recovery heat treatment was 3% on the basis of the Vickers hardness before the recovery heat treatment of the copper alloy sheet. Further, the copper alloy plate after the recovery heat treatment was cold-rolled at a working rate of 47% to a thickness of 0.40 mm, and the recovery heat treatment was performed at 460 ° C. At this time, the decreasing rate of the Vickers hardness after the recovery heat treatment was 2% on the basis of the Vickers hardness before the recovery heat treatment of the copper alloy sheet. Further, this recovery heat-treated copper alloy sheet was cold-rolled to a thickness of 0.20 mm at a processing rate of 50%, heated at 385 ° C., and subjected to recovery heat treatment to obtain Sample B-3. Note that the temperature is set so that the decrease rate of the Vickers hardness before and after the recovery heat treatment by the recovery heat treatment at this time is approximately −3%.
試料B-1は、熱間圧延を施した時にワレが生じ、特性データが得られなかった。このワレは、ニッケル含有量が多くなると、ニッケル、リンを含む低融点化合物が生成されることに起因するものと考えられる。 <Contrast between Example and Comparative Example>
Sample B-1 was cracked when subjected to hot rolling, and characteristic data could not be obtained. This crack is considered to be caused by the generation of a low melting point compound containing nickel and phosphorus when the nickel content increases.
Claims (8)
- ニッケルを0.50wt%~1.50wt%、リンを0.05wt%~0.20wt%、スズを0.00wt%~0.04wt%、亜鉛を0.00wt%~0.50wt%含む銅合金条の製造方法であって、以下の工程A~工程Cを含む、回復現象を利用して強化することを特徴とする析出硬化型銅合金条の製造方法。
工程A: 銅合金インゴットに熱間圧延を施し、その後時効析出処理して時効析出処理済み銅合金条を得る工程。
工程B: 工程Aで得られた時効析出処理済み銅合金条に、加工率50%~90%で施す中間冷間圧延とその後施す中間回復熱処理とを1単位として含む中間加工を施し、回復熱処理済み銅合金条を得る工程。
工程C: 工程Bで得られた回復熱処理済み銅合金条に、加工率20%~95%で最終冷間圧延を施し、その後最終回復熱処理を施して回復現象を利用して強化した析出硬化型銅合金条を得る工程。 Copper alloy containing 0.50wt% to 1.50wt% nickel, 0.05wt% to 0.20wt% phosphorus, 0.00wt% to 0.04wt% tin, 0.00wt% to 0.50wt% zinc A method for manufacturing a precipitation hardening copper alloy strip, comprising the following steps A to C, wherein the strip is strengthened using a recovery phenomenon.
Step A: A step of subjecting a copper alloy ingot to hot rolling, and thereafter performing an aging precipitation treatment to obtain an aging precipitation-treated copper alloy strip.
Step B: The copper alloy strip obtained by the step A is subjected to intermediate processing including intermediate cold rolling performed at a processing rate of 50% to 90% and intermediate recovery heat treatment applied thereafter as one unit, and recovery heat treatment A process of obtaining a finished copper alloy strip.
Step C: Precipitation hardening type in which the recovery heat-treated copper alloy strip obtained in Step B is subjected to final cold rolling at a processing rate of 20% to 95% and then subjected to final recovery heat treatment to strengthen the recovery phenomenon. The process of obtaining a copper alloy strip. - 前記工程Bは、前記1単位の中間加工を複数回繰り返すものである請求項1に記載の析出硬化型銅合金条の製造方法。 The said process B is a manufacturing method of the precipitation hardening type copper alloy strip of Claim 1 which repeats said 1 unit of intermediate | middle process in multiple times.
- 前記工程Bは、前記1単位の中間加工の少なくとも1回は、当該中間回復熱処理前の銅合金条のビッカース硬度を基準として、当該中間回復熱処理後の銅合金条のビッカース硬度の低下率を4%~15%とするものである請求項1又は請求項2に記載の析出硬化型銅合金条の製造方法。 In the step B, at least one time of the intermediate processing of one unit is based on the Vickers hardness of the copper alloy strip before the intermediate recovery heat treatment, and the decrease rate of the Vickers hardness of the copper alloy strip after the intermediate recovery heat treatment is 4 The method for producing a precipitation hardening copper alloy strip according to claim 1 or 2, wherein the content is from 15% to 15%.
- 前記工程Bは、中間加工前の時効析出処理済み銅合金条に、加工率50%~90%で冷間圧延を施し、その後、部分的に再結晶組織が現れる二次時効析出処理を行って、二次時効析出処理済み銅合金条とする工程を含むものである請求項1又は請求項2のいずれかに記載の析出硬化型銅合金条の製造方法。 In the step B, the copper alloy strip subjected to the aging precipitation treatment before the intermediate working is subjected to cold rolling at a working rate of 50% to 90%, and then a secondary aging precipitation treatment in which a recrystallized structure partially appears. The manufacturing method of the precipitation hardening type copper alloy strip in any one of Claim 1 or Claim 2 which includes the process made into the secondary aging precipitation-treated copper alloy strip.
- 前記工程Cの最終回復熱処理は、当該最終回復熱処理前の銅合金条に対する当該最終回復熱処理後の銅合金条のビッカース硬度の低下率を4%未満とするものである請求項1~請求項4のいずれかに記載の析出硬化型銅合金条の製造方法。 The final recovery heat treatment in the step C is such that the decrease rate of the Vickers hardness of the copper alloy strip after the final recovery heat treatment relative to the copper alloy strip before the final recovery heat treatment is less than 4%. The manufacturing method of the precipitation hardening type copper alloy strip in any one of these.
- 前記工程Cの最終回復熱処理は、当該最終回復熱処理前の銅合金条のビッカース硬度を基準として、当該最終回復熱処理後の銅合金条のビッカース硬度の低下率を4%~15%とするものである請求項1~請求項5のいずれかに記載の析出硬化型銅合金条の製造方法。 The final recovery heat treatment in Step C is based on the Vickers hardness of the copper alloy strip before the final recovery heat treatment as a reference, and the decrease rate of the Vickers hardness of the copper alloy strip after the final recovery heat treatment is 4% to 15%. The method for producing a precipitation hardening type copper alloy strip according to any one of claims 1 to 5.
- 引張強さ500N/mm2以上、伸び率5%以上、導電率50%IACS以上の物性を備え、曲げ加工性及び耐応力緩和性が良好な銅合金条を製造するものである請求項1~請求項6のいずれかに記載の析出硬化型銅合金条の製造方法。 A copper alloy strip having physical properties of a tensile strength of 500 N / mm 2 or more, an elongation of 5% or more, and an electrical conductivity of 50% IACS or more, and good bending workability and stress relaxation resistance is produced. The manufacturing method of the precipitation hardening type copper alloy strip in any one of Claim 6.
- 請求項1、請求項2、請求項4~請求項6のいずれかに記載の析出硬化型銅合金条の製造方法において、
ニッケルを0.50wt%~1.50wt%、リンを0.05wt%~0.20wt%、スズを0.00wt%~0.04wt%、亜鉛を0.00wt%~0.50wt%含み、Ni(wt%)/P(wt%)比率の値が6~10の銅合金インゴットを用いることで、
引張強さ500N/mm2以上、伸び率5%以上、導電率65%IACS以上の物性を備える曲げ加工性及び耐応力緩和性が良好な銅合金条を製造することを特徴とする析出硬化型銅合金条の製造方法。 In the method for producing a precipitation hardening type copper alloy strip according to any one of claims 1, 2, and 4 to 6,
Nickel containing 0.50 wt% to 1.50 wt%, phosphorus 0.05 wt% to 0.20 wt%, tin 0.00 wt% to 0.04 wt%, zinc 0.00 wt% to 0.50 wt%, Ni By using a copper alloy ingot having a (wt%) / P (wt%) ratio value of 6 to 10,
Precipitation hardening type characterized by producing a copper alloy strip with good bending workability and stress relaxation resistance, having a tensile strength of 500 N / mm 2 or more, an elongation of 5% or more, and a conductivity of 65% or more IACS. A method for producing a copper alloy strip.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2008801263280A CN101939460B (en) | 2008-02-08 | 2008-11-14 | Process for producing precipitation-hardened copper alloy strip |
JP2009552385A JP4714943B2 (en) | 2008-02-08 | 2008-11-14 | Method for producing precipitation hardening type copper alloy strip |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-029593 | 2008-02-08 | ||
JP2008029593 | 2008-02-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009098810A1 true WO2009098810A1 (en) | 2009-08-13 |
Family
ID=40951894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2008/070747 WO2009098810A1 (en) | 2008-02-08 | 2008-11-14 | Process for producing precipitation-hardened copper alloy strip |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP4714943B2 (en) |
CN (1) | CN101939460B (en) |
WO (1) | WO2009098810A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015086462A (en) * | 2013-11-01 | 2015-05-07 | Jx日鉱日石金属株式会社 | Copper alloy sheet excellent in conductivity and stress relaxation property |
WO2015122423A1 (en) * | 2014-02-12 | 2015-08-20 | 株式会社Uacj | Copper alloy material and copper alloy pipe |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104332211A (en) * | 2014-11-17 | 2015-02-04 | 苏州科茂电子材料科技有限公司 | Tinning phosphor copper line |
CN107427109B (en) * | 2015-03-27 | 2020-11-13 | Ykk株式会社 | Fastener element for slide fastener |
KR102005332B1 (en) | 2019-04-09 | 2019-10-01 | 주식회사 풍산 | Method for manufacturing Cu-Co-Si-Fe-P alloy having Excellent Bending Formability |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60114557A (en) * | 1983-11-24 | 1985-06-21 | Mitsubishi Electric Corp | Manufacture of copper alloy plate and bar |
JP2000239812A (en) * | 1999-02-25 | 2000-09-05 | Hitachi Cable Ltd | Manufacture of high-strength and high-conductivity copper alloy material |
JP2007107087A (en) * | 2005-09-16 | 2007-04-26 | Kobe Steel Ltd | Copper alloy plate having excellent stress relaxation resistance, and process for producing the same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999013117A1 (en) * | 1997-09-05 | 1999-03-18 | The Miller Company | Copper based alloy featuring precipitation hardening and solid-solution hardening |
US6251199B1 (en) * | 1999-05-04 | 2001-06-26 | Olin Corporation | Copper alloy having improved resistance to cracking due to localized stress |
CN1254554C (en) * | 2002-11-15 | 2006-05-03 | 清华大学 | High-strength and high-conductivity RE-Cu alloy and its production process |
TW200531762A (en) * | 2004-01-30 | 2005-10-01 | Sumitomo Metal Ind | Continuous casting method for copper alloy |
EP2366807B1 (en) * | 2005-06-08 | 2013-08-21 | Kabushiki Kaisha Kobe Seiko Sho | Copper alloy and copper alloy plate |
-
2008
- 2008-11-14 JP JP2009552385A patent/JP4714943B2/en active Active
- 2008-11-14 CN CN2008801263280A patent/CN101939460B/en active Active
- 2008-11-14 WO PCT/JP2008/070747 patent/WO2009098810A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60114557A (en) * | 1983-11-24 | 1985-06-21 | Mitsubishi Electric Corp | Manufacture of copper alloy plate and bar |
JP2000239812A (en) * | 1999-02-25 | 2000-09-05 | Hitachi Cable Ltd | Manufacture of high-strength and high-conductivity copper alloy material |
JP2007107087A (en) * | 2005-09-16 | 2007-04-26 | Kobe Steel Ltd | Copper alloy plate having excellent stress relaxation resistance, and process for producing the same |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015086462A (en) * | 2013-11-01 | 2015-05-07 | Jx日鉱日石金属株式会社 | Copper alloy sheet excellent in conductivity and stress relaxation property |
WO2015122423A1 (en) * | 2014-02-12 | 2015-08-20 | 株式会社Uacj | Copper alloy material and copper alloy pipe |
JPWO2015122423A1 (en) * | 2014-02-12 | 2017-03-30 | 株式会社Uacj | Copper alloy material and copper alloy tube |
Also Published As
Publication number | Publication date |
---|---|
JP4714943B2 (en) | 2011-07-06 |
CN101939460A (en) | 2011-01-05 |
JPWO2009098810A1 (en) | 2011-05-26 |
CN101939460B (en) | 2012-09-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11655524B2 (en) | Copper alloy with excellent comprehensive performance and application thereof | |
JP4584692B2 (en) | High-strength copper alloy sheet excellent in bending workability and manufacturing method thereof | |
US8287669B2 (en) | Copper alloy for electric and electronic equipments | |
JP4408275B2 (en) | Cu-Ni-Si alloy with excellent strength and bending workability | |
JP4418028B2 (en) | Cu-Ni-Si alloy for electronic materials | |
KR102126731B1 (en) | Copper alloy sheet and method for manufacturing copper alloy sheet | |
KR101579629B1 (en) | Copper alloy sheet and method for producing same | |
JP4177104B2 (en) | High-strength copper alloy excellent in bending workability, manufacturing method thereof, and terminal / connector using the same | |
JP5619389B2 (en) | Copper alloy material | |
KR20140025607A (en) | Copper alloy | |
CN112055756B (en) | Cu-co-si-fe-p-based alloy having excellent bending formability and method for producing the same | |
JP2011508081A (en) | Copper-nickel-silicon alloy | |
WO2013039201A1 (en) | Copper alloy sheet and production method for copper alloy sheet | |
TWI432586B (en) | Cu-Co-Si alloy material | |
WO2010067863A1 (en) | Ni-Si-Co COPPER ALLOY AND MANUFACTURING METHOD THEREFOR | |
EP2270242A1 (en) | Copper alloy material for electric and electronic apparatuses, and electric and electronic components | |
JP4714943B2 (en) | Method for producing precipitation hardening type copper alloy strip | |
JP4754930B2 (en) | Cu-Ni-Si based copper alloy for electronic materials | |
WO2011152104A1 (en) | Cu-co-si-based alloy sheet, and process for production thereof | |
CN111575531B (en) | High-conductivity copper alloy plate and manufacturing method thereof | |
JP2009108342A (en) | Aluminum alloy plate for forming, and its manufacturing method | |
JP4807484B2 (en) | Aluminum alloy plate for forming and method for producing the same | |
JP2010236029A (en) | Cu-Si-Co ALLOY FOR ELECTRONIC MATERIAL, AND METHOD OF MANUFACTURING THE SAME | |
JP2006188722A (en) | Method for producing brass material and brass material | |
JP2009185375A (en) | Precipitation hardening type copper alloy strip strengthened utilizing recovery phenomenon |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200880126328.0 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 08872198 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2009552385 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 08872198 Country of ref document: EP Kind code of ref document: A1 |