WO2004090181A1 - Alliage a base de cuivre - Google Patents

Alliage a base de cuivre Download PDF

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Publication number
WO2004090181A1
WO2004090181A1 PCT/JP2004/004757 JP2004004757W WO2004090181A1 WO 2004090181 A1 WO2004090181 A1 WO 2004090181A1 JP 2004004757 W JP2004004757 W JP 2004004757W WO 2004090181 A1 WO2004090181 A1 WO 2004090181A1
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WIPO (PCT)
Prior art keywords
weight
copper
content
alloy
tensile strength
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Application number
PCT/JP2004/004757
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English (en)
Japanese (ja)
Inventor
Kazuhito Kurose
Tomoyuki Ozasa
Masaki Matsuo
Hisanori Terui
Rokurou Kawanishi
Original Assignee
Kitz Corporation
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Filing date
Publication date
Application filed by Kitz Corporation filed Critical Kitz Corporation
Priority to JP2005505232A priority Critical patent/JP4489701B2/ja
Priority to US10/550,067 priority patent/US20060225816A1/en
Publication of WO2004090181A1 publication Critical patent/WO2004090181A1/fr
Priority to US12/003,601 priority patent/US20080145265A1/en

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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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/02—Alloys based on copper with tin as the next major constituent

Definitions

  • the present invention relates to a copper-based alloy suitable for, for example, plumbing, cocks, fittings, and other water-supply plumbing equipment and the like, and more particularly to a copper-based alloy having improved mechanical properties at high temperatures, particularly improved tensile strength.
  • bronze material (CAC 406) is excellent in formability, corrosion resistance, machinability, and pressure resistance, and has a good flow of molten metal when melted. In general, it is widely used for plumbing equipment such as pulp, cook, and wed.
  • Japanese Patent Publication No. Hei 5-63335 6 proposes a lead-free copper alloy in which Bi is added in place of lead in a copper alloy to improve machinability and prevent dezincification.
  • Pb-less copper alloys are manufactured using the same manufacturing equipment as conventional CAC 406 during mass production. Pb may be mixed.
  • the above Pb-less copper alloys are manufactured using recycled materials such as scrap in consideration of commercially available ingots and costs and the environment.
  • these materials contain Pb as inevitable impurities. Is inevitable.
  • the above Pb-less copper alloy allows the content of Pb of 0.4% by weight or less at the unavoidable impurity level even if the production equipment is dedicated to the Pb-less copper alloy.
  • the eutectic is a structure formed by simultaneously crystallizing ⁇ and / 3 crystals from the melt, and the crystal grains are very fine, and ⁇ and are mixed.
  • the present invention has been developed in view of the above circumstances, and its object is to provide an alloy with B i, alone or combined with each other; an alloy with Pb, or an intermetallic compound in an alloy structure. Forming has improved the reduction in tensile strength at high temperatures and has further brought the mechanical properties closer to CAC 406: to provide a Pb-less copper-based alloy. Disclosure of the invention
  • the present invention provides a mechanical property at a high temperature by adding Bi or Pb alone or in a state of being bonded to each other and an additive element forming an alloy or an intermetallic compound.
  • an additive element forming an alloy or an intermetallic compound.
  • it is a copper base alloy with improved tensile strength.
  • the additive element is a copper-based alloy selected from one or more of the group consisting of Te, P, Zr, Ti, Co, In, Ca, B, and misch metal.
  • the additive element is a copper-based alloy containing 0.01 to 2.0% by weight. This is a copper-based alloy that suppresses the formation of a Bi-Pb binary eutectic in the alloy structure.
  • the copper-based alloy contains at least copper containing at least 2.8 to 6.0% by weight of Sn, 1.0 to 12.0% by weight of Zn, and 0.1 to 3.0% by weight of Bi. It is a base alloy.
  • the above copper-based alloy weighs at least Sn 2.8-6.0. / 0, Zn 1.0-12.0% by weight, Bi 0.1-1.2.4% by weight, Se 0.05-1.
  • the content of Pb contained in the copper-based alloy was set to 0.25% by weight or less. It is a copper-based alloy. '' Brief description of the drawings
  • FIG. 1 is a graph showing the test results of tensile test 1.
  • FIG. 2 is a graph showing test results of the tensile test 2.
  • FIG. 3 is a graph showing test results of the tensile test 3.
  • FIG. 4 is a graph showing the test results of the tensile test 3.
  • FIG. 5 is a graph showing the test results of the tensile test 3.
  • FIG. 6 is a graph showing the test results of the tensile test 4.
  • FIG. 7 is a graph showing the test results of the machinability test.
  • FIG. 8 is a graph showing the results of the Charpy impact test of the samples No. 62 to No. 64 and the B i —P b area ratio.
  • FIG. 9 is a graph showing the Charpy impact test results of samples No. 65 to No. 67 and the B i -P b area ratio.
  • FIG. 10 is a metallographic photograph (magnification: 400 times) of a standard sample (comparative example).
  • FIG. 11 is a mapping of each element in the metallographic photograph of FIG.
  • FIG. 12 is a metallographic photograph (magnification 400 times) of a sample No. 63 containing 0.09% by weight of P. ,
  • FIG. 13 is a mapping of each element in the metallographic photograph of FIG.
  • FIG. 14 is a photograph of a metal structure of sample No. 66 containing 0.2% by weight of Te (magnification: 400 times).
  • FIG. 15 shows the matting of each element in the metallographic photograph of FIG. _
  • Fig. 16 shows tissue observation photographs (before and after image processing) in which the area ratio of sample No. 62 to No. 64 was measured.
  • FIG. 17 shows tissue observation photographs (before and after image processing) in which the area ratio of the samples No. 65 to No. 67 was measured.
  • the alloy structure When an additive element is added to the alloy, the alloy structure contains Bi-M intermetallic compound (or alloy), Pb-M intermetallic compound (or alloy), or Bi-Pb-M intermetallic compound (or alloy). Or alloy) to suppress the generation of Bi-Pb binary eutectic in the alloy structure.
  • M is an additive element, and one or two of the group consisting of Te, P ⁇ Zr, Ti, Co, In, Ca, B, and mischmetal. More than one species was selected.
  • Bi-Pb This is because Bi and Pb that form the binary eutectic are reduced, and thereby the generation of the Bi—Pb binary eutectic is suppressed.
  • the mechanical properties at high temperatures are improved.
  • preferred copper-based alloys are Cu-Sn-Zn_Bi-based and Cu-Sn-Zn-Bi-Se-based copper-based alloys.
  • the following forms containing the component elements are adopted, and the range of each component and the reason thereof will be specifically described in detail. '
  • Sn is an element that decreases the machinability as the content increases in the practical component range. Therefore, it is necessary to ensure the mechanical properties while keeping the content low, and within the range that does not lower the corrosion resistance. As a more preferable range, attention should be paid to the elongation characteristics that are easily affected by the content of Sn, and even if the manufacturing conditions are slightly different, the elongation around 4.0% by weight with the best characteristics can be reliably obtained. , 3.5-4.5% by weight.
  • the effective content for improving the high-temperature properties is 1.0% by weight or more, considering the content of additional elements such as Te that forms an alloy or an intermetallic compound with Bi and Pb and the content of Se. .
  • Zn suppresses the generation of S11 oxide due to gas absorption into the molten metal, and is also effective for the soundness of the molten metal. Therefore, in order to exert this effect, the content of 4.0% by weight or more is effective. It is. More practically, the content is preferably 5.0% by weight or more from the viewpoint of compensating for the suppression of Bi and Se.
  • Z1! Has a high vapor pressure, it is desirable to contain 12.0% by weight or less in consideration of securing a working environment and mirroring. Considering the economics, about 8.0% by weight is optimal.
  • a content of 0.1% by weight or more is effective for improving machinability.
  • the content In order to prevent porosity generated in the product during the solidification process of the structure and to prevent the occurrence of shrinkage cavities and other structural defects, and to ensure the soundness of the product, the content should be at least 0.6% by weight. It is effective.
  • it is effective to set the content to 3.0% by weight or less, and in particular, to set the content to 1.7% by weight or less while suppressing the content. Sufficient confirmation of mechanical properties It is effective to keep.
  • the content of Bi is preferably 0.1 to 2.4% by weight together with the content of Se, and about 1.3% by weight is optimal considering the optimum content of Se.
  • a component that exists as an intermetallic compound of Bi-Se, Zn-Se, and Cu-Se in the copper alloy, and contributes to ensuring the soundness of machinable materials, similar to Bi. is there. Therefore, the content of Se is effective for the mechanical properties and the soundness of animals while suppressing the content of Bi.
  • the upper limit of the content was set at 1.2% by weight from the viewpoint of economy.
  • a small amount of Se contributes to ensuring the soundness of foods, it is effective to contain 0.05% by weight or more in order to obtain its effect reliably. And Especially about 0.2 weight. / 0 is optimal.
  • Te is a component that improves the machinability by dispersing without dissolving in the matrix.
  • the effect of improving the machinability by Te is not exhibited at less than 0.01% by weight.
  • 0.05% by weight or more is required in order to crystallize the intermetallic compound Te Pb (melting point: about 917 ° C.) and to suppress the generation of Bi—Pb binary eutectic.
  • the content exceeding 1.0% by weight is not economical, and does not improve the decrease in tensile strength corresponding to the content. From these points, the content of the bat 6 is set to 0.01 to 1.0% by weight, preferably to 0.05 to 0.5% by weight.
  • P has the function of refining crystal grains and improving mechanical properties.
  • the P content in the alloy is usually 0.015 to 0.03% by weight, but Bi—Pb binary eutectic (melting point about 1%) 2 5 ° C) crystallized intermetallic compound P b 3 P 2 is higher melting point than, B i - to suppress the formation of P b 2 ternary co Akirabutsu, the tensile strength at high temperatures under low -
  • the content is preferably 0.05 to 0.1% by weight.
  • Pb Even at the impurity level, Pb may be contained in the range of 0.3 to 0.4% by weight. Therefore, the range of unavoidable impurities that do not actively contain Pb is set to 0.25% by weight or less.
  • the additional elements contained for the purpose of suppressing the generation of the Bi—Pb binary eutectic are Te, P, It is possible to select one or more from the group consisting of Zr, Ti, Co, In, Ca, B, and misch metal, and the content is from 0.01 to 0.1 1.0% by weight is preferred. Also, with respect to a copper-based alloy containing Sb in an amount of 0.05 to 0.5% by weight, the addition of the above-mentioned additional element suppresses the generation of a Bi—Pb binary eutectic, It has the effect of improving high-temperature characteristics. In addition, inevitable impurities in the copper-based alloy of the present invention include Fe (0.3% by weight or less), A1 (0.01% by weight or less), and Si (0.01% by weight or less). Can be
  • Cu—Sn—Zn—Bi—Se-type Cu—Sn—Zn—B containing Te and Zr as additional elements in the leadless copper-based alloy of the present invention Perform a tensile test on i-type bronze material and explain the test results.
  • the tensile test was performed under the following four conditions.
  • Te content 0 to: I, 48% by weight, Test temperature: room temperature (22 ° C), 100 ° C and 150 ° C. Table 1 shows the composition of the sample. In Test 1, the effect of Te content is confirmed.
  • Te 0 to 0.17% by weight
  • Se 0 to 1.2% by weight
  • test temperature 150 ° C.
  • Table 2 shows the composition of the sample. In this test 2, the effect of Te content is confirmed for samples with different Se content.
  • Te content 0-0.22% by weight
  • 36 content 0-0.83 Weight 0 /.
  • Zn content 1.02 to 8.53% by weight
  • Test temperature 150 ° C.
  • Table 3 shows the composition of the sample. This test 3 confirms application to low Z11.
  • Zr content 0 to 0.21% by weight, test temperature: room temperature (20 ° C), 100 ° C and 150 ° C. Table 4 shows the composition of the sample. In Test 4, the effect of Zr content is confirmed.
  • the inclusion of 0.2% by weight of Se improves the tensile strength at high temperature by about 50% compared to a specimen containing no Se.
  • the content of Ding 6 is 0.05% by weight or more, the tensile strength at high temperatures is further improved.
  • the upper limit of the content of Se is set to 1.2% by weight from the viewpoint of economy, but considering the rate of improvement in tensile strength, it is preferable to set the upper limit to 0.4% by weight. In particular, 0.2% by weight is optimal.
  • the results of Test 4 are shown in Table 8 and FIG.
  • the Results Z r a 0.5 0 5 wt 0/0, 0. 1 2 wt 0/0, 0.
  • 1 wt% 1 0 0 ° standard 1 7 0. 4 NZmm 2 in C and in comparison, each 1 8 0. 1 N / mm 2 , 1 9 4. 7 N / mm 2 0 5.
  • 6 NZmm 2 and has a tensile strength is improved, 1 5 0 ° standard 1 4 9 even C .
  • Compared to 4 N / mm 2 Were respectively 1 5 7. 8 N / mm 2 , 1 7 2.
  • the tensile strength does not increase or decrease depending on the Zr content, and all have sufficient tensile strength. For this reason, even when Zr is contained, sufficient tensile strength can be obtained at room temperature, and further, tensile strength at high temperatures can be improved. From the above tests, it was found that the content of Te can improve the tensile strength at high temperature, and further, the interaction with Se can improve the tensile strength at high temperature. The content of Zr can also improve the tensile strength at high temperatures, but its effect is slightly lower than Te.
  • Cutting test conditions are as follows: machining diameter ⁇ 30, feed amount 0.2 mm / rev, depth of cut 3.0 mm, number of revolutions 180 rpm, cutting speed 170 m / min, the cutting state was dry, and the evaluation was made by setting the cutting resistance of CAC 406 to 100 and expressing the cutting resistance of each sample as a cutting index. The following shows how to calculate the machinability index.
  • Machinability index (Cutting resistance value of CAC406) Z (Cutting resistance value of each sample) X100
  • bronze containing 0.05 to 0.09% by weight of P and 0.6% of 1 Prepare a bronze porcelain containing 0 to 21% by weight, perform a high-temperature Shallby impact test on this bronze porcelain, and explain the test results.
  • the content of Pb contained in the bronze material was set to 0.2% by weight or less.
  • FIG. 8 shows a graph of the data of these samples No. 62 to No. 64.
  • Table 1 2 the standard sample as a 1 0 0% ⁇ value (Sample N o. 6 7), 0. 1 wt Ding 6 0/0 (Sample N o. 6 5), 0. 2 1 weight 0/0 (sample N o. 6 6) shows the impact values of the samples contained.
  • FIG. 9 is a graph of the data of these samples No. 65 to No. 67.
  • Comparative Example No. 67 0.212 100 As shown in Fig. 8, when 0.05% by weight of P is contained, the impact value is improved by 126% compared to the standard sample, and P is 0.09% by weight. %, The impact value was improved by 273% compared to the standard sample. Therefore, it was found that the impact value of the alloy was improved with the inclusion of P.
  • the content of P was improved by an average of 200%, and the content of Te was improved by an average of 212%.
  • the area ratio of the Bi-Pb eutectic shown in the table and the figure will be described later.
  • each test piece was subjected to EDX quantitative analysis and mapping. Mapping is to analyze where a specific element is located, and to display the area where the element is concentrated in yellow. Each analysis was performed on the cut surface of the test piece after the Charpy impact test while avoiding the fracture surface.
  • FIG. 10 shows a metallographic photograph (magnification: 400 ⁇ ) of the new standard sample (comparative example), and FIG. 11 shows the matting of each element in the metallographic photograph of FIG.
  • Table 13 shows the chemical component values of this standard sample (Comparative Example).
  • Table 14 shows the results of the quantitative analysis of EDX in regions 1 to 3 shown in the metallographic photographs of FIG.
  • FIG. 12 shows a metallographic photograph (magnification: 400 times) of the sample No. 63 containing 0.09% by weight of P, and each element in the metallic structure photograph of FIG. The mapping is shown in Figure 1'3.
  • Table 15 shows the results of EDX quantitative analysis in regions 1 and 2 shown in the metallographic photographs of FIG.
  • an alloy refers to a state in which two or more metal elements are melted in a solid state.
  • an intermetallic compound refers to a compound formed by combining two or more component metals in an alloy with a relatively simple ratio of the number of atoms.
  • FIG. 14 shows a metallographic photograph (magnification: 400 times) of the sample No. 66 containing 0.21% by weight of the chopstick 6, and each element in the metallographic photograph of FIG. Figure 15 shows the mapping.
  • Table 16 shows the results of quantitative analysis of EDX in regions 1 to 5 shown in the metallographic photographs of FIG.
  • the area ratio refers to the ratio of the area occupied by the target substance (Bi-Pb binary eutectic phase) to the area of the visual field captured as an image.
  • the Bi-Pb binary eutectic phase was identified by comparing the EDX quantitative analysis results with the metallographic photographs.
  • the metallographic photograph was taken at a magnification of 400 ⁇ , and the area ratio was calculated from the average value of 20 visual fields in each sample.
  • Example No. 64 Microstructure of the standard sample (sample No. 64), the sample No. 62 containing 0.05% by weight of P, and the sample No. 63 containing 0.09% by weight of P.
  • Table 11 shows the results of measuring the area ratio of the Bi-Pb binary eutectic when P was contained as an additive element.
  • the area ratio of the Bi-Pb phase of the standard sample (sample No. 64) was 0.268%, and the Bi_Pb phase when P was contained.
  • the area ratio was 0.103% when P 0.05% by weight was contained, and 0.14% when P 0.09% by weight was contained.
  • FIG. 8 shows a graph of the data of these samples No. 62 to No. 64.
  • the standard sample (sample No. 67) had a Bi-Pb phase area ratio of 0.212%, and contained 0.1% by weight of TeO. 0 5 2%, T e O . was 0 3 5% 0.2 1 wt 0/0 containing.
  • FIG. 9 shows a graph of the data of these samples No. 65 to No. 67.
  • the copper-based alloy of the present invention is not limited to the above-mentioned bronze alloy.
  • a brass-based alloy for example, brass for hot forging, Cu 59.0 to 6 2.0% by weight, Sn 0.5 to 1.5% by weight, Bi 1.0 to 2.0% by weight, Se 0.03 to 0.20% by weight, Fe 0.05 It contains a component range of ⁇ 0.20% by weight, P 0.05 ⁇ 0.10% by weight, and in the case of brass for cutting, Cu 61.0 ⁇ 63.0 weight 0 /. , Sn O. 3 ⁇ 0. 7 wt%, B i 1. 5 ⁇ 2. 5 wt%, S e 0. 0 3 ⁇ 0. 2 0 wt%, F e 0. 1 ⁇ 0. 3 0 wt 0 /.
  • a P 0. 0 5 to 0. Applicable to 1 0 weight 0/0 leadless copper base alloys containing component range.
  • the addition of additional elements such as Te and P suppresses the generation of the Bi-Pb binary eutectic in the alloy structure.
  • the amount of recycled materials such as scrap was reduced, and the content of Pb was suppressed by adjusting the content of Pb to be lower than the upper limit of 0.2% by weight as an inevitable impurity. I'm sorry.
  • a Bi-Pb binary eutectic is formed in an alloy structure by adding Bi and Pb, which are singly or bonded to each other, and an additive element that forms an alloy or an intermetallic compound.
  • the copper-based alloy of the present invention can be used for processing and forming water contact products such as pulp, joints, pipes, faucets, water supply / hot water supply products, and electric / mechanical products such as gas appliances, washing machines, and air conditioners. It is suitable for processing and molding.
  • suitable materials and parts using the copper-based alloy of the present invention as a material are, in particular, water contact parts such as pulp and faucet, that is, ball pulp, empty ponole in ball valve, pallet, taphrino knollep, gate pallet. , Globe panoleb, check valve, water supply, mounting fittings for water heaters and hot water flush toilet seats, water supply pipes, connection pipes and fittings, refrigerant pipes, electric water heater parts (casing, gas nozzle, pump parts, wrench etc.
  • water contact parts such as pulp and faucet, that is, ball pulp, empty ponole in ball valve, pallet, taphrino knollep, gate pallet.
  • Globe panoleb check valve
  • water supply mounting fittings for water heaters and hot water flush toilet seats
  • connection pipes and fittings refrigerant pipes
  • electric water heater parts casing, gas nozzle, pump parts, wrench etc.
  • Strainers parts for water meters, parts for underwater sewerage, drain plugs, elbow pipes, bellows, connecting flanges for toilet bowls, spindles, joints, headers, branch taps, hose nipples, faucet fittings, stopcocks , Plumbing supplies, sanitary ware fittings, shower hose connection fittings, gas appliances, building materials such as doors and knobs, home appliances, It can be widely applied to tubing header adapters, automotive cooler parts, fishing tackle parts, microscope parts, water meters. One part, weigher parts, railway pantograph parts, and other parts.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)
  • Heat Treatment Of Steel (AREA)
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Abstract

La présente invention concerne un alliage à base de cuivre, caractérisé en ce qu'il comprend un métal ajouté qui forme un alliage ou un composé intermétallique comprenant du Bi, du Pb et une substance formée par la liaison du Bi et du Pb, et en ce qu'il possède des propriétés mécaniques améliorées, en particulier la résistance à la traction, à des températures élevées en raison de l'incorporation du métal ajouté, le métal ajouté étant de préférence constitué par un ou plusieurs métaux choisis dans le groupe composé du Te, P, Zr, Ti, Co, In, Ca, B et de mischmétal. La formation d'un alliage ou d'un composé intermétallique du métal ajouté avec du Bi, du Pb et une substance formée par la liaison du Bi et du Pb dans la structure de l'alliage de cuivre permet d'améliorer la résistance à la traction à une température élevée, et par conséquent de préparer un alliage de cuivre sensiblement dépourvu de Pb possédant des propriétés mécaniques qui se rapprochent davantage de celles du CAC406.
PCT/JP2004/004757 2003-04-10 2004-04-01 Alliage a base de cuivre WO2004090181A1 (fr)

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JP2005505232A JP4489701B2 (ja) 2003-04-10 2004-04-01 銅基合金
US10/550,067 US20060225816A1 (en) 2003-04-10 2004-04-01 Copper base alloy
US12/003,601 US20080145265A1 (en) 2003-04-10 2007-12-28 Copper-based alloy

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WO2007026780A1 (fr) 2005-08-30 2007-03-08 Kitz Corporation Alliage de bronze a tete basse
GB2422846B (en) * 2003-12-03 2007-05-23 Kitz Corp Copper-based alloy and ingot and liquid-contacting part using the alloy
KR101088697B1 (ko) * 2011-05-23 2011-12-01 창영산업주식회사 베어링용 합금 및 이로부터 제조된 베어링
WO2017101147A1 (fr) * 2015-12-15 2017-06-22 苏州华安矿业科技有限公司 Buse d'atomisation à ultrasons
WO2017101148A1 (fr) * 2015-12-15 2017-06-22 苏州华安矿业科技有限公司 Buse poreuse destinée à l'exploitation minière
CN111394610A (zh) * 2020-04-29 2020-07-10 福建紫金铜业有限公司 一种5g用vc均温板的铜板带材料生产工艺
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KR101781183B1 (ko) * 2012-10-31 2017-09-22 가부시키가이샤 기츠 황동 합금과 가공 부품 및 접액 부품
CN107584123A (zh) * 2017-08-21 2018-01-16 东睦新材料集团股份有限公司 一种铜基受电弓滑板毛坯的制备方法

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JP2002088427A (ja) * 2000-09-14 2002-03-27 Kitz Corp 青銅合金

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2422846B (en) * 2003-12-03 2007-05-23 Kitz Corp Copper-based alloy and ingot and liquid-contacting part using the alloy
WO2007026780A1 (fr) 2005-08-30 2007-03-08 Kitz Corporation Alliage de bronze a tete basse
KR101088697B1 (ko) * 2011-05-23 2011-12-01 창영산업주식회사 베어링용 합금 및 이로부터 제조된 베어링
CN112941363A (zh) * 2013-06-12 2021-06-11 株式会社栗本铁工所 水管部件用铜合金
WO2017101147A1 (fr) * 2015-12-15 2017-06-22 苏州华安矿业科技有限公司 Buse d'atomisation à ultrasons
WO2017101148A1 (fr) * 2015-12-15 2017-06-22 苏州华安矿业科技有限公司 Buse poreuse destinée à l'exploitation minière
CN111394610A (zh) * 2020-04-29 2020-07-10 福建紫金铜业有限公司 一种5g用vc均温板的铜板带材料生产工艺
CN111394610B (zh) * 2020-04-29 2021-03-23 福建紫金铜业有限公司 一种5g用vc均温板的铜板带材料生产工艺

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JP4489701B2 (ja) 2010-06-23

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