EP2742161A2 - Copper zinc alloy - Google Patents
Copper zinc alloyInfo
- Publication number
- EP2742161A2 EP2742161A2 EP12735197.1A EP12735197A EP2742161A2 EP 2742161 A2 EP2742161 A2 EP 2742161A2 EP 12735197 A EP12735197 A EP 12735197A EP 2742161 A2 EP2742161 A2 EP 2742161A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- copper
- layer
- mpa
- alloy
- rolling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910001297 Zn alloy Inorganic materials 0.000 title description 4
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 title description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 69
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 65
- 239000000956 alloy Substances 0.000 claims abstract description 65
- 239000002245 particle Substances 0.000 claims abstract description 44
- 229910052742 iron Inorganic materials 0.000 claims abstract description 33
- 239000010949 copper Substances 0.000 claims abstract description 29
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 24
- 229910052802 copper Inorganic materials 0.000 claims abstract description 24
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 21
- 229910001369 Brass Inorganic materials 0.000 claims abstract description 18
- 239000010951 brass Substances 0.000 claims abstract description 18
- 239000011159 matrix material Substances 0.000 claims abstract description 15
- 229910052718 tin Inorganic materials 0.000 claims abstract description 14
- 230000000930 thermomechanical effect Effects 0.000 claims abstract description 4
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 3
- 229910052738 indium Inorganic materials 0.000 claims abstract description 3
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 3
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 3
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 3
- 229910052709 silver Inorganic materials 0.000 claims abstract description 3
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 3
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- 239000000356 contaminant Substances 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 description 36
- 238000000137 annealing Methods 0.000 description 31
- 238000005097 cold rolling Methods 0.000 description 23
- 238000005452 bending Methods 0.000 description 20
- 238000004519 manufacturing process Methods 0.000 description 19
- 239000011701 zinc Substances 0.000 description 19
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 15
- 239000000203 mixture Substances 0.000 description 15
- 239000011135 tin Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 13
- 239000000463 material Substances 0.000 description 11
- 238000005496 tempering Methods 0.000 description 11
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 10
- 238000005098 hot rolling Methods 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 230000002349 favourable effect Effects 0.000 description 6
- 238000005755 formation reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000005482 strain hardening Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- 238000003801 milling Methods 0.000 description 5
- 238000007747 plating Methods 0.000 description 5
- 229910001208 Crucible steel Inorganic materials 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 2
- 229910001096 P alloy Inorganic materials 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- YWIHFOITAUYZBJ-UHFFFAOYSA-N [P].[Cu].[Sn] Chemical compound [P].[Cu].[Sn] YWIHFOITAUYZBJ-UHFFFAOYSA-N 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- 238000011179 visual inspection Methods 0.000 description 2
- 241001275902 Parabramis pekinensis Species 0.000 description 1
- 229910020900 Sn-Fe Inorganic materials 0.000 description 1
- 229910019314 Sn—Fe Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- UJUAHMSIDCTLHL-UHFFFAOYSA-N [Zn].[Sn].[Cu].[Fe] Chemical compound [Zn].[Sn].[Cu].[Fe] UJUAHMSIDCTLHL-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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
- C22C9/04—Alloys based on copper with zinc as the next major constituent
Definitions
- the invention relates to a copper alloy according to the preamble of
- Terminal contact is an optimization of the embodiment at the lowest cost.
- Desired properties of an alloy include, for example, high electrical and thermal conductivity and high stress relaxation resistance and tensile strength.
- copper alloys are typically used because of their generally excellent corrosion resistance, high electrical and thermal conductivity, and good bearing and wear qualities. Copper alloys are also suitable because of their good cold working or hot working properties and their good deformation behavior.
- US Pat. No. 6,132,528 discloses copper-tin-iron-zinc alloys which have a higher zinc content of up to 35.0%.
- the iron content is between 1, 6 and 4.0%.
- the addition of iron has the function to achieve a grain refinement after casting.
- the invention has for its object to further develop a copper alloy to further develop this with respect to the stress relaxation resistance and other material properties.
- the alloy with low metal value is based on the technological properties of the bronzes CuSn4 (C51100) and CuSn6 (C51900).
- the manufacturing process should be as simple as possible. In terms of tensile strength, values of 600 MPa and electrical conductivity should be at least 20% IACS.
- the processed as a strip of copper alloy should be well bendable and can be used as a spring material.
- the invention is represented by the features of claim 1.
- the other dependent claims relate to advantageous embodiments and further developments of the invention.
- the invention includes a copper alloy which has been subjected to a thermomechanical treatment consisting of (in% by weight):
- Ni optionally 0.05 to 0.5%
- finely divided iron-containing particles are contained in the alloy matrix.
- the copper alloy according to the invention is primarily ribbon, wire or tubular material, with the main constituents copper, zinc, tin and iron.
- the zinc content between 15.5 and 36.0% is selected in the alloy in particular according to the criterion that an easily deformable, single-phase alloy is obtained.
- the single-phase basic structure consists of alpha phase. Also, the basic structure must be suitable to absorb the finest possible precipitates of other elements. It has been shown that the zinc content should not exceed 36.0%, as otherwise sets a less favorable phase properties in the alloy. In a preferred embodiment the zinc content of a maximum of 32.0% is not exceeded. In particular, in excess of the specified value zinc content occurs in this context unwanted brittle beta phase.
- a higher tin content in the alloy according to the invention has an effect on the strength and on the relaxation resistance.
- the tin content should not exceed 3.0%, as the conductivity and bendability are negatively affected.
- Tin concentration is kept as low as possible, but at a level below 0.3%, no significant impact on alloy properties is expected.
- Iron is responsible for the formation of precipitate particles and thus for an improvement in the relaxation properties in comparison to conventional brasses.
- the precipitation formation can be controlled and optimized during the manufacturing process. In particular, precipitates form in this alloy during a hot rolling step
- Hardening mechanisms are primarily supported by the element iron.
- the iron-containing particles present in the alloy matrix are formed in the sub-micron range.
- the other elements optionally contained in the alloy can bring about a further improvement in the properties of the alloy with regard to the process control or else have an effect on the production process in the molten phase.
- the relaxation resistance is significantly improved compared to the conventional brass rings and is only slightly below the values customary for bronze. With respect to the relaxation resistance, therefore, the present brass alloy is in the range of commercial tin bronzes. In the alloy according to the invention special emphasis is placed on their
- Microstructure which identifies a special combination of main textures due to the processing steps.
- the texture is produced during the thermomechanical treatment due to different rolling processes.
- Walzumform Institute can on the one hand cold rolling and intermediate annealing and on the other hand hot rolling processes in conjunction with other
- the desired material characteristics are for example for the construction of spring elements of particular interest, because thereby the stiffness of the spring and its load capacity are determined. There is a narrow
- Cubic face-centered metals usually form two different types of textures after high rolling deformation, depending on their stacking fault energy.
- copper rolling texture which is composed of the ideal layers, the so-called brass layer and the S-layer and the copper layer.
- alloy rolling texture is formed of low staple fault energy metallic materials, which include most copper alloys, and which consists essentially of the brass layer.
- the particular advantage is that the resistance to stress relaxation of the alloy of the present invention is significantly better than that of tin-free and iron-free copper-zinc alloys and that the alloy simultaneously has a lower metal value than copper-tin-phosphorus alloys.
- the Cu-Zn-Sn-Fe materials according to the invention also exhibit a more favorable softening behavior than the tin bronze used in comparable products.
- the loss of strength at any rate decreases with the onset of recrystallization.
- the iron-containing particles present in the alloy matrix are consistently sufficiently small in the sub-micron range that good tin-plating and processability to a plug connector is ensured.
- the desired intermetallic phases can be formed with the copper of the alloy matrix during hot-dip galvanizing. Even with galvanic tinning with a subsequent reflow treatment, the advantageous intermetallic phases form uniformly over the entire surface.
- the prerequisite for the uniformly tin-pliable surface is that the small particles do not undergo significant stretching in the rolling direction during mechanical forming by means of hot rolling or cold rolling in the matrix.
- the content of tin 0.7% to 1, 5% and of iron from 0.5% to 0.7%.
- a lower tin content within the stated limits is therefore particularly advantageous, because in this way the conductivity and the bendability of the alloy are further improved.
- the specified iron content is selected so that particularly fine iron-containing particles form in the alloy matrix. However, these particles still have the size to significantly improve the mechanical properties.
- the zinc content may be between 21.5% and 31.5%.
- the desired single-phase alpha-phase alloy can be produced.
- Such alloys are easier to form and still suitable for a fine Excretion distribution of iron-containing particles.
- the zinc content may be between 28.5% to 31.5%.
- Ratio of the proportions of the main textures of brass layer and copper layer are less than 1. Compared to the known brass alloys of similar composition, but without iron precipitates, this quotient shows the peculiarities of this alloy. While in comparable studies pure CuZn30 alloys have a quotient of more than 1.2, the desired mechanical properties develop in the strip material given a low ratio of the brass layer to the copper layer. The amount of stiffness and resilience of spring materials is determined.
- the ratio of the proportions of the main textural layers of brass layer and copper layer can be between 0.4 to 0.90. In the specified range, particularly favorable mechanical properties of the alloy are formed.
- finely divided iron-containing particles with a diameter smaller than 1 ⁇ be present at a density of at least 0.5 particles per ⁇ 2 in the alloy matrix.
- the combination of particle size and their distribution in the alloy ultimately shape the mechanical properties.
- Diameter smaller than 1 ⁇ is more than 99% pronounced and primarily determining the advantageous properties.
- the middle one is more than 99% pronounced and primarily determining the advantageous properties.
- Particle diameter of the finely divided iron-containing particles even smaller than 50 to 100 nm. If such small particles subjected to mechanical deformation by means of hot rolling or cold rolling, so they undergo no significant stretching in the rolling direction, from which then the good tin plating of
- the mean grain size of the alloy matrix can be less than 10 ⁇ . More preferably, however, the mean grain size is at most 5 ⁇ .
- Comparative Example 1 (CuZn23.5Sn1.0): fine-grained
- the alloy components were melted in graphite crucible and
- the composition of a laboratory block is Cu 75.47% -Zn 23.47% -Sn 1.06% (see Table 1). After milling at 22 mm thickness, the samples were hot rolled to 12 mm at 700-800 ° C and then milled to 10 mm.
- the alloy was annealed at 500 ° C. for 3 hours. In this case, a yield strength of 109 MPa was achieved with a grain size of 30- 35 pm and a conductivity of 26.5% IACS. After the subsequent cold rolling at 0.33 mm and annealing at 320 ° C / 3 h, the yield strength is
- yield strengths of 541 MPa at an A10 elongation of 19.3% and a conductivity of 25.1% IACS were obtained at 24% previous cold work.
- the minimum bending radius minBR in relation to the strip thickness t (minBR / t vertical / parallel) in the V die is 0.4 / 1, 2.
- the stress relaxation resistance is 92.3% after 100 ° C / 1000 h and 82.1% of the initial stress after 120X / 1000 h.
- yield strengths were achieved by
- the stress relaxation resistance is 90.2% after 100 ° C./1000 h and, after 120 ° C./1000 h, 79.8% of the initial stress.
- Bending radius based on the strip thickness (minBR / t vertical / parallel) in the V-die is 0.4 / 2.8.
- the composition corresponds to that of Comparative Example 1, the production is the same as in Comparative Example 1 to 0.30 mm cold rolling. However, unlike Comparative Example 1, the second annealing does not occur 320X / 3 h, but at 520X / 3 h.
- the yield strength is 106 MPa at a particle size of 45 ⁇ and a conductivity of 27.9% IACS.
- yield strengths of 378 MPa at an A10 elongation of 33.7% and a conductivity of 26.9% IACS were achieved at 24% previous cold work.
- the minimum bending radius in relation to the strip thickness (minBR / t vertical / parallel) in the V-die is 2.4 / 1.6.
- the stress relaxation resistance is 94.7% after 100 ° C / 1000 h and 93.0% of the initial stress after 120 ° C / 1000 h.
- yield strengths of 503 MPa were achieved with an A10 elongation of 10.2%, a conductivity of 26.5% IACS and minBR / t perpendicular / parallel of 3.5 / 4.0.
- the stress relaxation resistance is 96.1% after 100 ° C / 1000 h and 91.2% of the initial stress after 120 ° C / 1000 h.
- Fine grain production (541 MPa) can be achieved with 24% speed. At the same time, however, the A10 strains in fine grain production are more favorable at 19.3% compared to 10.2% for coarse grain production. Similarly cheap are the
- the alloy components were melted in a graphite crucible and then laboratory blocks were cast in steel molds by the Tammann method.
- the composition of the laboratory block is Cu74.95% - Zn23.40% - Sn1, 06% FeO, 59%, see Table 1.
- the samples were hot rolled to 12 mm at 700-800 ° C and then milled to 10 mm.
- the microstructure shows smaller, ⁇ 1 pm particles after hot rolling.
- the ⁇ 1 pm particles were identified as Fe-containing by EDX.
- the alloy was annealed at 500 ° C. for 3 hours. Here was a
- yield strengths of 686 MPa were obtained with an A10 elongation of 6.5%, a conductivity of 22.8% IACS, and a minimum / average of 4/10 RPM / t.
- yield strengths of 632 MPa at an A10 elongation of 9.4% and a conductivity of 23.2% IACS were achieved at 24% previous cold work.
- the minimum bending radius in relation to the strip thickness (minBR / t vertical / parallel) in the V-die is 3.2 / 4.8.
- the stress relaxation resistance is 90.8% after 100 ° C / 1000 h and 80.1% of the initial stress after 120 ° C / 1000 h.
- yield strengths were achieved by
- the Fe-containing fine-grained variant after the final annealing at 300 ° C / 5 min by 82 MPa (24% roll) or 64 MPa (40% rolling) higher yield strength.
- 620 MPa can be achieved with different production.
- CuZn23.5Sn1, 0Fe0.6 achieves a yield strength of 623 MPa after 24% rolling and final annealing at 300 ° C / 5 min and CuZn23.5Sn1, 0 a yield strength of 622 MPa after 40% rolling and final annealing at 300 ° C / 5 minute
- the A10 strains in the Fe-containing variant are higher at 10.5% compared to 4.6% for CuZn23.5Sn1.0.
- the stress relaxation resistance of both variants is similar.
- Average particle density is 1, 2 / ⁇ 2 .
- the alloy components were melted in graphite crucible and
- the composition of the laboratory block is Cu74.77% -Zn23.45% -Sn1, 04% FeO, 56% -P0.19%, see Table 1. After milling at 22 mm thickness, the samples were at 700-800 ° C at 12 mm
- the microstructure shows smaller, ⁇ 1 pm particles. In addition, some coarser,> 1 pm particles are present in the matrix.
- the particles were identified by FeX as FeP-containing.
- the alloy was annealed at 500 ° C. for 3 hours.
- a yield strength of 293 MPa was achieved with a particle size of 10 pm and a conductivity of 26.6% IACS.
- the yield strength is 393 MPa with a grain size of 3-4 pm and a conductivity of
- yield strengths of 710 MPa were achieved with an A10 elongation of 3.11%, a conductivity of 23.7% IACS, and a minimum / min of 3.5 / 1 1.
- the stress relaxation resistance is 100 ° C / 1000 h 90.1% and after 120 ° C / 1000 h 79.6% of the initial stress.
- Bending radius in relation to the strip thickness (minBR / t vertical / parallel) in the V-die is 2/6.
- the stress relaxation resistance is 93.5% after 100 ° C / 1000 h and 81.0% of the initial stress after 120 ° C / 1000 h. at
- the FeP-containing fine-grained variant after the final annealing at 300 ° C / 5 min by 92 MPa (24% roll) or 88 MPa (40% rolling) higher yield strength.
- Example 5 (CuZn23.5Sn1.0 Fe0.6P0.2): - coarse-grained
- Example 4 The composition corresponds to that of Example 4, the production is the same as in Example 4 to cold rolling at 0.33 mm. However, unlike Example 4, the second annealing does not take place at 370 ° C./3 h but at 520 ° C./3 h. This results in a yield strength of 212 MPa with a grain size of 10-25pm and a conductivity of 26.7% IACS. After rolling at final caliper and tempering at 300 ° C / 5 minutes, yield strengths of 534 MPa at an A10 elongation of 23.1% and a conductivity of 24.5% IACS were achieved at 24% previous cold work. The minimum bending radius in relation to the strip thickness (minBR / t vertical / parallel) in the V-die is 2.4 / 3.2. The stress relaxation resistance is after
- Example 4 shows after the second annealing 180 MPa higher yield strength of the fine-grained structure compared to the coarse-grained structure.
- the subsequent cold working reduces this difference to 60 MPa for the 24% deformed and 40 MPa for the 40% deformed sample.
- the difference in the yield strength between coarse grain and fine grain is 100 MPa
- the alloy components were melted in graphite crucible and Subsequently, using the Tammann method, laboratory blocks were placed in
- the composition of the laboratory block is Cu68.26% -Zn30.16% -Sn1, 03% FeO, 55%, see Table 1.
- the samples were hot rolled at 1200 mm at 700-800 ° C and then milled to 10 mm.
- the microstructure shows after hot rolling smaller, ⁇ 1 ⁇ particles.
- the ⁇ 1 ⁇ particles were identified by means of EDX as Fe-containing.
- the alloy was annealed at 500 ° C. for 3 hours. In this case, a yield strength of 339 MPa was achieved with a grain size of 5 pm and a conductivity of 23.1% IACS.
- strip casting is also considered in this context.
- a part was annealed at 520 ° C / 3 h. In this case, a yield strength of 340 MPa at a grain size of 3- 4 pm and a conductivity of 23% IACS was obtained.
- the minimum bending radius in relation to the strip thickness (minBR / t vertical / parallel) in the V-die is 0/0.
- the stress relaxation resistance is 88% after 100 ° C / 1000 h and 76.7% of the initial stress after 120 ° C / 1000 h.
- yield strengths of 550 MPa were achieved with an A10 elongation of 21.3%, a conductivity of 21.9% IACS and minBR / t perpendicular / parallel of 0.9 / 0.4.
- the stress relaxation resistance is 88.3% after 100 ° C / 1000 h and 75.6% of the initial stress after 120X / 1000 h.
- yield strengths of 505 MPa were achieved at 12% previous cold work, with an A10 elongation of 18.5% and a conductivity of 22.6% IACS.
- the minimum bending radius in relation to the strip thickness (minBR / t vertical / parallel) in the V-die is 0/0.
- the stress relaxation resistance is 87.3% after 100 ° C / 1000 h and 76.2% of the initial stress after 120 ° C / 1000 h.
- yield strengths of 564 MPa were achieved with an A10 elongation of 19.9%, a conductivity of 22.2% IACS and minBR / t perpendicular / parallel of 0.9 / 0.6.
- the stress relaxation resistance is 88.4% after 100X / 1000 h and 77.6% of the initial stress after 120X / 1000 h.
- yield strengths of 704 MPa were achieved with an A10 elongation of 2.9%, a conductivity of 21.5% IACS and minBR / t perpendicular / parallel of 2 / 6.4.
- the stress relaxation resistance is 77.5% after 100 ° C / 1000 h and 61.8% after 120X / 1000 h
- yield strengths of 765 MPa were achieved with an A10 elongation of 1.5%, a conductivity of 21.6% IACS, and a minimum / average of 4.0 / 9.2 minBR / t.
- the stress relaxation resistance is 76.8% after 100 ° C / 1000 h and 59.9% of the initial stress after 120 ° C / 1000 h.
- the microstructure of a flat section from the final state was represented by an AsB detector on a scanning electron microscope. At an image magnification of 5000: 1 and 10000: 1, the number of particles per 1 pm 2 image detail was counted.
- the diameter of at least 90% of the iron particles is less than 200 nm. With less than 10%, iron particles with a diameter of 200 nm to 1 pm exist.
- the average particle density is 0.9 particles per ⁇ m 2 .
- Comparative alloy CuZn30 a value of 1.38 at a rolling degree of 47% at the final forming.
- S / R position the respectively originating from the rolling texture or recrystallization texture are in the Euler space
- the strips were hot-tinned with a layer thickness of 2-3 pm.
- the tinning result is poor, pores and streaks occur.
- the line inhomogeneities on the tinned surface go back to the elongated Fe lines, where no Cu is present to form an intermetallic phase.
- the alloy components were melted in graphite crucible and
- the composition of the laboratory block is Cu 73.82% Zn 23.19% -Sn 1, 04% Fe 1.95%, see Table 1. After milling at 22 mm thickness, the samples were hot rolled at 1200 mm at 700-800 ° C. The microstructure shows similar to CuZn23,5Sn1, 0Fe0,6 smaller, under 1 ⁇ particles.
- the alloy was annealed at 500 ° C / 3h. In this case, a yield strength of 362 MPa was achieved with a grain size of 2- 3 ⁇ and a conductivity of 24.2% IACS. After the subsequent
- the yield strength is 386 MPa at a particle size of 2 ⁇ and a conductivity of 24.0% IACS.
- yield strengths of 642 MPa at an A10 elongation of 8.4% and a conductivity of 23.1% IACS were achieved at 24% previous cold work.
- the minimum bending radius in relation to the strip thickness (minBR / t vertical / parallel) in the V-die is 2/5.
- yield strengths of 712 MPa were achieved with an A10 elongation of 5.0%, a conductivity of 22.4% IACS, and minBR / t perpendicular / parallel of 2.5 / 9.
- DIN EN 60068-2-20 performed on the samples tempered at 300 ° C / 5min. The samples were pickled and brushed. The solder bath was made of Sn60Pb40 at 235 ° C. The test was carried out at a dipping speed of 25 mm / sec and a residence time of 5 sec using as the flux pure rosin at 260 g / l. During the subsequent visual inspection, the samples were rated as poor due to strong dewetting.
- the reason for the poor tininess of the samples are the elongated Fe-containing lines. At this Cu is not present for the formation of an intermetallic phase and there are undesirable inhomogeneities on the tinned ribbons.
- Table 2 Properties after final cold rolling to final thickness and annealing 250 ° C / 3h
- Table 3 Properties after final cold rolling to final thickness and annealing 300 ° C / 5min
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011110588 | 2011-08-13 | ||
PCT/EP2012/002523 WO2013023717A2 (en) | 2011-08-13 | 2012-06-15 | Copper alloy |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2742161A2 true EP2742161A2 (en) | 2014-06-18 |
EP2742161B1 EP2742161B1 (en) | 2016-12-07 |
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Application Number | Title | Priority Date | Filing Date |
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EP12735197.1A Active EP2742161B1 (en) | 2011-08-13 | 2012-06-15 | Copper zinc alloy |
Country Status (9)
Country | Link |
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US (1) | US9493858B2 (en) |
EP (1) | EP2742161B1 (en) |
JP (1) | JP2014527578A (en) |
KR (1) | KR20140050003A (en) |
CN (1) | CN103732769B (en) |
BR (1) | BR112014003377A2 (en) |
MX (1) | MX2014000570A (en) |
TW (1) | TWI591192B (en) |
WO (1) | WO2013023717A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2759612A4 (en) * | 2011-09-20 | 2015-06-24 | Mitsubishi Shindo Kk | Copper alloy sheet and method for producing copper alloy sheet |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102012002450A1 (en) * | 2011-08-13 | 2013-02-14 | Wieland-Werke Ag | Use of a copper alloy |
EP3050982B1 (en) * | 2013-09-26 | 2019-03-20 | Mitsubishi Shindoh Co., Ltd. | Copper alloy and copper alloy sheet |
CN104342578B (en) * | 2014-10-21 | 2016-08-24 | 大丰市南亚阀门有限公司 | A kind of bronze alloy material for valve casting and process technique thereof |
CN106756222A (en) * | 2016-12-20 | 2017-05-31 | 薛亚红 | A kind of Copper-zinc alloy material |
CN109112351B (en) * | 2018-08-27 | 2020-12-11 | 山东光韵智能科技有限公司 | High-elasticity-modulus brass alloy material and preparation method thereof |
MX2019000947A (en) | 2019-01-22 | 2020-07-23 | Nac De Cobre S A De C V | Copper-zinc alloy free of lead and resistant to the marine environment. |
DE102021103686A1 (en) | 2021-02-17 | 2022-08-18 | Diehl Metall Stiftung & Co. Kg | brass alloy |
CN113073229B (en) | 2021-03-25 | 2021-12-07 | 上海五星铜业股份有限公司 | Tin brass alloy and preparation method thereof |
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US3816109A (en) | 1972-07-03 | 1974-06-11 | Olin Corp | Copper base alloy |
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US4259124A (en) | 1978-06-28 | 1981-03-31 | Olin Corporation | Modified brass alloys with improved stress relaxation resistance |
JPS6326320A (en) | 1986-07-18 | 1988-02-03 | Nippon Mining Co Ltd | High power conductive copper alloy |
JPH01165734A (en) | 1987-09-21 | 1989-06-29 | Nippon Mining Co Ltd | Material for case of piezoelectric oscillator |
US6132528A (en) * | 1997-04-18 | 2000-10-17 | Olin Corporation | Iron modified tin brass |
US5853505A (en) | 1997-04-18 | 1998-12-29 | Olin Corporation | Iron modified tin brass |
US20010001400A1 (en) * | 1997-04-18 | 2001-05-24 | Dennis R. Brauer Et Al | Grain refined tin brass |
US5893953A (en) * | 1997-09-16 | 1999-04-13 | Waterbury Rolling Mills, Inc. | Copper alloy and process for obtaining same |
US6949150B2 (en) * | 2000-04-14 | 2005-09-27 | Dowa Mining Co., Ltd. | Connector copper alloys and a process for producing the same |
JP4294196B2 (en) * | 2000-04-14 | 2009-07-08 | Dowaメタルテック株式会社 | Copper alloy for connector and manufacturing method thereof |
US6264764B1 (en) | 2000-05-09 | 2001-07-24 | Outokumpu Oyj | Copper alloy and process for making same |
CN1177946C (en) * | 2001-09-07 | 2004-12-01 | 同和矿业株式会社 | Copper alloy for connector use and producing method thereof |
JP2005060773A (en) * | 2003-08-12 | 2005-03-10 | Mitsui Mining & Smelting Co Ltd | Special brass and method for increasing strength of the special brass |
JP4584692B2 (en) * | 2004-11-30 | 2010-11-24 | 株式会社神戸製鋼所 | High-strength copper alloy sheet excellent in bending workability and manufacturing method thereof |
WO2008010378A1 (en) * | 2006-07-21 | 2008-01-24 | Kabushiki Kaisha Kobe Seiko Sho | Copper alloy sheets for electrical/electronic part |
JP5191725B2 (en) | 2007-08-13 | 2013-05-08 | Dowaメタルテック株式会社 | Cu-Zn-Sn based copper alloy sheet, manufacturing method thereof, and connector |
WO2011019042A1 (en) | 2009-08-10 | 2011-02-17 | 古河電気工業株式会社 | Copper alloy material for electrical/electronic components |
DE102012002450A1 (en) * | 2011-08-13 | 2013-02-14 | Wieland-Werke Ag | Use of a copper alloy |
-
2012
- 2012-04-26 TW TW101114884A patent/TWI591192B/en active
- 2012-06-15 KR KR1020147000034A patent/KR20140050003A/en not_active Application Discontinuation
- 2012-06-15 CN CN201280039553.7A patent/CN103732769B/en active Active
- 2012-06-15 MX MX2014000570A patent/MX2014000570A/en unknown
- 2012-06-15 BR BR112014003377A patent/BR112014003377A2/en not_active Application Discontinuation
- 2012-06-15 US US14/235,884 patent/US9493858B2/en active Active
- 2012-06-15 WO PCT/EP2012/002523 patent/WO2013023717A2/en active Application Filing
- 2012-06-15 EP EP12735197.1A patent/EP2742161B1/en active Active
- 2012-06-15 JP JP2014524282A patent/JP2014527578A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2759612A4 (en) * | 2011-09-20 | 2015-06-24 | Mitsubishi Shindo Kk | Copper alloy sheet and method for producing copper alloy sheet |
Also Published As
Publication number | Publication date |
---|---|
TWI591192B (en) | 2017-07-11 |
CN103732769B (en) | 2016-08-17 |
US9493858B2 (en) | 2016-11-15 |
TW201307585A (en) | 2013-02-16 |
EP2742161B1 (en) | 2016-12-07 |
CN103732769A (en) | 2014-04-16 |
KR20140050003A (en) | 2014-04-28 |
MX2014000570A (en) | 2014-04-30 |
US20140161661A1 (en) | 2014-06-12 |
WO2013023717A3 (en) | 2013-06-20 |
US20140377127A9 (en) | 2014-12-25 |
JP2014527578A (en) | 2014-10-16 |
WO2013023717A2 (en) | 2013-02-21 |
BR112014003377A2 (en) | 2017-03-01 |
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