US20110005739A1 - Copper Alloy for Heat Exchanger Tube - Google Patents
Copper Alloy for Heat Exchanger Tube Download PDFInfo
- Publication number
- US20110005739A1 US20110005739A1 US12/832,283 US83228310A US2011005739A1 US 20110005739 A1 US20110005739 A1 US 20110005739A1 US 83228310 A US83228310 A US 83228310A US 2011005739 A1 US2011005739 A1 US 2011005739A1
- Authority
- US
- United States
- Prior art keywords
- alloy
- tube
- weight
- present
- copper
- 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.)
- Abandoned
Links
- 229910000881 Cu alloy Inorganic materials 0.000 title claims abstract description 16
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 84
- 239000000956 alloy Substances 0.000 claims abstract description 84
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000010949 copper Substances 0.000 claims abstract description 23
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 23
- 229910052802 copper Inorganic materials 0.000 claims abstract description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 15
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 13
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011574 phosphorus Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 15
- 239000012535 impurity Substances 0.000 claims description 8
- 239000011135 tin Substances 0.000 abstract description 26
- 229910052718 tin Inorganic materials 0.000 abstract description 17
- 238000001816 cooling Methods 0.000 abstract description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 2
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 1
- 239000001569 carbon dioxide Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 21
- 239000000203 mixture Substances 0.000 description 16
- 229910003336 CuNi Inorganic materials 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000005219 brazing Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000002826 coolant Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001128 Sn alloy Inorganic materials 0.000 description 2
- VRUVRQYVUDCDMT-UHFFFAOYSA-N [Sn].[Ni].[Cu] Chemical compound [Sn].[Ni].[Cu] VRUVRQYVUDCDMT-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- OHMHBGPWCHTMQE-UHFFFAOYSA-N 2,2-dichloro-1,1,1-trifluoroethane Chemical compound FC(F)(F)C(Cl)Cl OHMHBGPWCHTMQE-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000000779 depleting effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/085—Heat exchange elements made from metals or metal alloys from copper or copper alloys
-
- 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
-
- 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
Definitions
- the present invention pertains generally to copper alloys and use of the copper alloys in tubes for heat exchangers. Specifically, the invention pertains to a high strength copper alloy tube that has desirable pressure fracture strength and processability properties.
- the alloy is suitable to reduce thickness, and therefore, conserves material, for existing air conditioning and refrigeration (ACR) heat exchangers, and is suitable for use in a heat exchanger using a cooling medium such as CO 2 .
- Heat exchangers for air conditioners may be constructed of a U-shaped copper tube bent like a hairpin and fins made from aluminum or aluminum alloy plate.
- a copper tube used for the above type heat exchanger requires suitable conductivity, formability, and brazing properties.
- HCFC hydro-chlorofluorocarbon
- HCFC hydro-chlorofluorocarbon
- Green refrigerants for example, CO 2 , which is a natural cooling medium, have been used for heat exchangers.
- the condensing pressure during operation needs to be increased to use CO 2 as a cooling media to maintain the same heat transfer performance as HCFC-based fluorocarbons.
- pressures at which these cooling media are used pressure of a fluid that flows in the heat exchanger tube
- R22 gas cooler in CO 2
- R22 a HCFC-based fluorocarbon
- the CO 2 cooling medium needs to have a condensing pressure of about 7 to 10 MPa (supercritical state). Therefore, the operating pressures of the new cooling media are increased as compared with the operating pressure of the conventional cooling medium R22.
- What is needed is a heat exchanger tube that has high tensile strength, excellent processability and good thermal conductivity that is suitable for reducing the wall thickness, and therefore, the material costs, for ACR heat exchangers and that is suitable for withstanding high pressure applications with new “green” cooling media such as CO 2 .
- the present invention provides a copper alloy, for use in heat exchanger tubes, having, for example, high tensile strength, excellent processability and good thermal conductivity.
- the present invention is a copper alloy composition, which includes the following where the percentages are by weight.
- the composition comprises copper (Cu), nickel (Ni) and tin (Sn).
- the alloy has a composition of 99% copper by weight, 0.5% nickel by weight and 0.5% tin by weight, represented as CuNi(0.5)Sn(0.5).
- nickel is present in the range of 0.2% to 1.0%, tin in the range of 0.2% to 1.0%, and the remainder includes Cu and impurities.
- the composition optionally comprises phosphorus in the range of 0.01% to 0.07%.
- the present invention provides tubes for ACR applications comprising the copper alloy composition.
- the alloy composition is formed into tubes for ACR applications.
- FIG. 1 Graphical representation of relative metal value per feet vs. copper price for a presently used alloy, C122, at standard wall thickness compared with an alloy of the present invention CuNi(0.5)Sn(0.5) at reduced wall thickness.
- FIG. 2 Graphical representation of tensile strength and conductivity for tested alloys as a function of Ni and Sn contents. Sn has a greater influence on both strength and conductivity.
- FIGS. 3( a )-( c ). Graphical representation of various views of a tube according to an embodiment of the present invention.
- Figure ( a ) is a perspective view
- Figure ( b ) is a cross-section of the tube of ( a ) as viewed along a longitudinal axis
- Figure ( c ) is a cross-section of the tube of ( a ) and ( b ) as viewed along an axis normal to the longitudinal axis.
- the present invention provides a high strength alloy which can, for example, reduce the wall thickness and therefore reduce the cost associated with existing ACR tubing and/or provide ACR tubing capable of withstanding the increased pressures associated with cooling media such as CO 2 .
- high strength it is meant that the alloy and/or tube made from the alloy has at least the levels of tensile strength and/or burst pressure and/or cycle fatigue failure set out herein.
- the copper alloy can provide savings in material, costs, environmental impact and energy consumption.
- the selected alloy should have appropriate material properties and perform well with regard to processability.
- Important material properties include properties such as, for example, burst pressure/strength, ductility, conductivity, and cycle fatigue. The characteristics of the alloy and/or tube described herein are desirable so they can withstand ACR operating environments.
- High tensile strength and high burst pressure are desirable tube properties because they define what operating pressure a tube can withstand before failing. For example, the higher the burst pressure, the more robust the tube design or for a given burst pressure minimum the present alloy allows for a thinner wall tube.
- the alloy and/or tube comprising the alloy has, for example, a material tensile strength of a minimum of 38 ksi (kilo-pound per square inch).
- the material tensile strength can be measured by methods known in the art such as, for example, the ASTM E-8 testing protocol.
- the alloy and/or tube comprising the alloy has a material tensile strength of 39, 40, 41 or 42 ksi.
- Ductility of the alloy and/or a tube made from the alloy is a desirable property because, in one embodiment, tubes need to be bent 180 degrees into hairpins without fracturing or wrinkling for use in the coil.
- Elongation is an indicator of material ductility.
- the alloy and/or tube comprising the alloy has, for example, an elongation of a minimum of 40%. The elongation can be measured by methods known in the art such as, for example, the ASTM E-8 testing protocol.
- the alloy and/or tube comprising the alloy has a minimum elongation of 41, 42, 43, 44, 45, 46, 47, 48, 49 or 50%.
- Conductivity is a desirable property because it relates to heat transfer capability and therefore, it is a component of the efficiency of an ACR coil. Also, conductivity can be important for tube formation.
- the alloy and/or tube comprising the alloy has, for example, a conductivity of a minimum of 35% IACS. The conductivity can be measured by methods known in the art such as, for example, the ASTM E-1004 testing protocol. In various embodiments, the alloy and/or tube comprising the alloy has a minimum conductivity of 36, 37, 38, 39, 40, 45, 50, 55, 60 or 65% (IACS).
- the alloy and/or tube has, for example, at least equal resistance to cycle fatigue failure as the current alloy in use, e.g., C122 as shown in Table 2. Further, it is desirable that the alloy and/or tube has, for example, at least equivalent resistance against one or more types of corrosion (e.g., galvanic corrosion and formicary corrosion) as the current alloy in use, e.g., C122.
- corrosion e.g., galvanic corrosion and formicary corrosion
- a tube comprising an alloy of the present invention has improved softening resistance (which can be important for brazing) and/or increased fatigue strength relative to a standard copper tube, e.g., a tube made from C 122.
- a tube depicted in FIGS. 3( a )-( c ) with reduced wall thickness t (relative to a tube comprising a conventional alloy, e.g., C122) comprising the present alloy has equal or improved burst pressure and/or cycle fatigue relative to tube comprising a conventional alloy, e.g., C122.
- the tube wall thickness of a tube of the present invention is minimized relative to a standard tube, e.g. a C122 tube, which reduces total material cost, and both tubes exhibit the same burst pressure.
- the tube wall thickness is at least 10, 15 or 20% less than a C122 tube, where both tubes have the same burst pressure.
- the burst pressure can be measured by methods known in the art such as, for example, CSA-C22.2 No. 140.3 Clause 6.1 Strength Test—UL 207 Clause 13.
- the cycle fatigue can be measured by methods known in the art such as, for example, CSA-C22.2 No. 140.3 Clause 6.4 Fatigue Test—UL 207 Clause 14.
- the alloy of the present invention can be fabricated according to methods known in the art. During the alloy fabrication process and/or tube formation process, it can be important to control the temperature. Control of temperature can be important in keeping the elements in solution (preventing precipitation) and controlling grain size. For example, conductivity can increase and formability can suffer if processed incorrectly.
- heat treatment in the production process will occur over a short time such that the temperature of the alloy and/or tube will be between 400-600° C. with a rapid (e.g., 10 to 500° C./second) upward and downward ramping of the temperature.
- the grain size is from 1 micron to 50 microns, including all integers between 1 micron and 50 microns. In another embodiment, the grain size is from 10 microns to 25 microns. In yet another embodiment, the grain size is from 10 microns to 15 microns. The grain size can be measured by methods known in the art such as, for example, the ASTM E-112 testing protocol.
- the alloy compositions of the present invention include the following where relative amounts of the components in the alloy are given as percentages by weight.
- the ranges of percentage by weight include all fractions of a percent (including, but not limited to, tenths and hundredths of a percent) within the stated ranges.
- the composition comprises copper, nickel, tin, and, optionally, phosphorus.
- the nickel is present in the range of 0.2% to 1.0%, and more specifically in the range of 0.3% to 0.7%; tin in the range of 0.2% to 1.0%, and more specifically in the range of 0.3% to 0.7%; and its remainder includes copper and impurities.
- the composition of the alloy is CuNi(0.5)Sn(0.5). In another embodiment, the composition of the alloy is CuNi(0.5)Sn(0.5)P(0.020).
- the impurities can be, for example, naturally-occurring or occur as a result of processing.
- impurities include, for example, zinc, iron and lead.
- the impurities can be a maximum of 0.6%. In various other embodiments, the impurities can be a maximum of 0.5, 0.45, 0.3, 0.2 or 0.1%.
- Phosphorus is present, optionally, in the range of 0.01% to 0.07%, and more specifically in the range of 0.015% to 0.030%, or at 0.02%. Without intending to be bound by any particular theory, it is considered that inclusion of an appropriate amount of phosphorus in the alloy increases the weldability of the alloy by effecting the flow characteristics and oxygen content of the metal, while addition of too much phosphorus leads to poor grain structure and unwanted precipitates.
- the composition consists essentially of Cu, Ni and Sn in the aforementioned ranges. In another embodiment the composition consists essentially of Cu, Ni, Sn and P in the aforementioned ranges.
- addition of components other than copper, nickel, tin (and phosphorus in the case of the second embodiment) does not result in an adverse change of greater than 5, 4, 3, 2 or 1% in properties of the alloys of the present invention such as, for example, burst pressure/strength, ductility, conductivity, and cycle fatigue.
- the composition of the alloy consists of Cu, Ni, Sn and P in the aforementioned ranges. In another embodiment, the composition of the alloy consists of Cu, Ni, Sn and P in the aforementioned ranges.
- the alloy of the present invention may be produced for use by various processes such as cast and roll, extrusion or roll and weld.
- the processing requirement includes, for example, brazeability. Brazing occurs when the tubes are connected as described below.
- the alloy in the roll and weld process the alloy is cast into bars, roll reduced to thin gauge, heat treated, slit to size, embossed, formed into tube, welded, annealed, and packaged.
- the alloy in the cast and roll process the alloy is cast into “mother” tube, drawn to size, annealed, machined to produce inner grooves, sized, annealed, and packaged.
- the alloy in the extrusion process, the alloy is cast into a solid billet, reheated, extrusion pressed, drawn and grooved to final dimensions, annealed and packaged.
- the present invention provides tubes comprising a copper-nickel-tin alloy (described herein).
- the tubes are from 0.100 inch to 1 inch in outer diameter, including all fractions of an inch between 0.100 inch and 1 inch, and have a wall thickness of from 0.004 inch to 0.040 inch, including all fractions of an inch between 0.004 and 0.040 inch.
- One advantage of the present invention is that thinner walled tubes can be used in ACR applications. This leads to reduced materials costs (see FIG. 1 ).
- the tubes comprising the copper-nickel-tin alloy are used in ACR applications. It is desirable that the tubes have sufficient conductivity (e.g., so that the tubes can be joined by welding) and formability (e.g., ability to be shaped, e.g., bent, after formation of the tube). Also, it is desirable that the tubes have properties such that the tube can have internal groove enhancement.
- One example of a process suited for the alloy of the present invention is a heat exchanger coil having tubes formed with a roll and weld process.
- the copper alloy of the present invention is cast into slabs followed by hot and cold rolling into flat strips.
- the cold rolled strips are soft annealed.
- the soft annealed copper alloy strips are then formed into heat exchanger tubes by means of a continuous roll forming and weld process.
- the tubes may be provided with internal enhancements such as grooves or ribs on the inside wall of the tube as will be evident to those of ordinary skill in the art.
- the tubes are formed in a continuous roll and weld process and the output may be wound into a large coil. The large coil may then be moved to another area where the coil is cut into smaller sections and formed into the U or hairpin shape.
- the hairpin is threaded into through-holes of aluminum fins and a jig is inserted into the U-shaped copper tube to expand the tube, thereby closely attaching the copper tube and the aluminum fin to each other. Then the open end of the U-shaped copper tube is expanded and a shorter hairpin similarly bent into a U-shape is inserted into the expanded end. The bent copper tube is brazed to the expanded open end using a brazing alloy thereby being connected to an adjacent hairpin to make a heat exchanger.
- Material of a composition of 0.5% Ni and 0.5% Sn (CuNi(0.5)Sn(0.5) was produced in full production scale and formed to tubes using the roll and weld method.
- the tubes were produced both in standard wall thickness (e.g., 0.0118 inches) and with 13% lower wall thickness.
- Mechanical properties of the tubes were tested using ASTM and UL (e.g., UL testing protocols and compared with tubes made of “present use” copper alloy C12200 with standard wall thickness. The results are shown in Table 2.
- the alloy of the invention CuNi(0.5)Sn(0.5) has higher strength and higher burst pressure in standard wall thickness. For tubes produced with reduced wall thickness the burst pressure for an alloy of the present invention (CuNi(0.5)Sn(0.5)) is still higher compared with C122 at standard wall thickness.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Conductive Materials (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/832,283 US20110005739A1 (en) | 2009-07-10 | 2010-07-08 | Copper Alloy for Heat Exchanger Tube |
US15/248,399 US20160363397A1 (en) | 2009-07-10 | 2016-08-26 | Copper alloy for heat exchanger tube |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US22467109P | 2009-07-10 | 2009-07-10 | |
US12/832,283 US20110005739A1 (en) | 2009-07-10 | 2010-07-08 | Copper Alloy for Heat Exchanger Tube |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/248,399 Continuation US20160363397A1 (en) | 2009-07-10 | 2016-08-26 | Copper alloy for heat exchanger tube |
Publications (1)
Publication Number | Publication Date |
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US20110005739A1 true US20110005739A1 (en) | 2011-01-13 |
Family
ID=43426607
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/832,283 Abandoned US20110005739A1 (en) | 2009-07-10 | 2010-07-08 | Copper Alloy for Heat Exchanger Tube |
US15/248,399 Abandoned US20160363397A1 (en) | 2009-07-10 | 2016-08-26 | Copper alloy for heat exchanger tube |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US15/248,399 Abandoned US20160363397A1 (en) | 2009-07-10 | 2016-08-26 | Copper alloy for heat exchanger tube |
Country Status (11)
Country | Link |
---|---|
US (2) | US20110005739A1 (xx) |
EP (1) | EP2451604B1 (xx) |
JP (2) | JP2012532990A (xx) |
CN (2) | CN107739880A (xx) |
BR (1) | BR112012000607B1 (xx) |
CA (1) | CA2767242C (xx) |
ES (1) | ES2649557T3 (xx) |
HK (1) | HK1251625A1 (xx) |
MX (1) | MX340861B (xx) |
MY (1) | MY173128A (xx) |
WO (1) | WO2011005926A1 (xx) |
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CN103602851B (zh) * | 2013-11-08 | 2015-10-28 | 浙江八达铜业有限公司 | 铜合金及其制造方法 |
CN107022695B (zh) * | 2017-04-26 | 2018-04-24 | 安徽普瑞普勒传热技术有限公司 | 一种换热器用耐腐蚀铜合金材料的生产工艺 |
KR20190055614A (ko) * | 2017-11-15 | 2019-05-23 | 엘지전자 주식회사 | 판형 열교환기 및 이를 포함하는 공기 조화기 |
CN109706343A (zh) * | 2018-12-10 | 2019-05-03 | 上海海亮铜业有限公司 | 一种镍掺杂c12200紫铜合金 |
EP3797891B1 (de) * | 2019-09-30 | 2023-08-02 | Nexans | Verfahren zur kontinuierlichen herstellung abschnittsweise gewellter, dünnwandiger hohlprofile kleiner durchmesser aus ne-metallen |
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Also Published As
Publication number | Publication date |
---|---|
ES2649557T3 (es) | 2018-01-12 |
CN107739880A (zh) | 2018-02-27 |
CA2767242A1 (en) | 2011-01-13 |
WO2011005926A1 (en) | 2011-01-13 |
JP6087982B2 (ja) | 2017-03-01 |
MY173128A (en) | 2019-12-30 |
CA2767242C (en) | 2016-09-27 |
EP2451604A1 (en) | 2012-05-16 |
BR112012000607A2 (xx) | 2017-09-05 |
CN102470471A (zh) | 2012-05-23 |
EP2451604B1 (en) | 2017-08-30 |
EP2451604A4 (en) | 2013-04-10 |
US20160363397A1 (en) | 2016-12-15 |
MX2012000544A (es) | 2012-07-20 |
HK1251625A1 (zh) | 2019-02-01 |
JP2012532990A (ja) | 2012-12-20 |
BR112012000607A8 (pt) | 2018-02-06 |
JP2015178679A (ja) | 2015-10-08 |
MX340861B (es) | 2016-07-28 |
BR112012000607B1 (pt) | 2019-03-06 |
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