WO2004079026A1 - 耐熱性銅合金材 - Google Patents
耐熱性銅合金材 Download PDFInfo
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- WO2004079026A1 WO2004079026A1 PCT/JP2003/012041 JP0312041W WO2004079026A1 WO 2004079026 A1 WO2004079026 A1 WO 2004079026A1 JP 0312041 W JP0312041 W JP 0312041W WO 2004079026 A1 WO2004079026 A1 WO 2004079026A1
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- heat
- content
- alloy material
- copper alloy
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/302—Cu as the principal constituent
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
-
- 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
- C22C9/04—Alloys based on copper with zinc as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
-
- 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
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/14—Heat exchangers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/12—Copper or alloys thereof
Definitions
- the present invention relates to a heat exchanger (an instantaneous water heater, a water heater, a water heater, a heat exchanger such as an air conditioner, a refrigerator, a radiator or a heat exchanger provided in a hot water supply system, an air conditioning system, a refrigeration system, etc.).
- a heat exchanger an instantaneous water heater, a water heater, a water heater, a heat exchanger such as an air conditioner, a refrigerator, a radiator or a heat exchanger provided in a hot water supply system, an air conditioning system, a refrigeration system, etc.
- Heat transfer pipes and pipes water supply pipes, hot water supply pipes, gas pipes
- Heat-resistant copper alloy materials suitable for use as pipes, plates, rods, wires, and processed materials (processed to a predetermined shape by brazing, etc.), which constitute equipment, equipment (four-way valves for switching heating and cooling, etc.) It is.
- heat transfer tubes, fins, flanges, body plates, etc. for heat exchange in instantaneous water heaters, water heaters, air conditioners, refrigerators, etc. are made of phosphorus-deoxidized copper (JISC1220) with excellent heat resistance. (Seamless copper alloy pipe) or plate material. At the time of manufacture, phosphor copper (JIS JIS 3264 BCu P-2) was used as the bonding material.
- the melting point of phosphorous copper is the solidus temperature: 710 ° C, the liquidus temperature:
- the heat transfer tubes and the like will be heated to about 800 ° C when performing welding.
- the crystal grains of the phosphor-deoxidized copper are coarsened.
- the mechanical strength (eg, after welding or after welding) (eg, tensile strength, heat resistance, elongation, fatigue strength, hardness, etc.) will be significantly reduced.
- the reduction in mechanical strength due to the coarsening of crystal grains in such a phosphor-deoxidized copper material slightly varies depending on the material manufacturing conditions such as heat transfer tubes, but is generally 600 to 700 ° C or more. Notable when heated. Therefore, in heat exchangers such as instantaneous water heaters and water heaters that use heat transfer tubes made of phosphorous deoxidized copper, the mechanical strength of the heat transfer tubes and the like is reduced at the manufacturing stage. There was a problem with durability.
- heat transfer tubes such as instantaneous water heaters, water heaters, and air conditioners
- their use causes the heat transfer tubes to repeat thermal expansion and contraction frequently.
- the product life may be short due to the risk of fatigue rupture.
- the problem of strong durability is particularly remarkable in heat exchanger tubes of heat exchange using heat medium gas other than HCFC-based chlorofluorocarbon, and heat transfer tubes made of phosphor-deoxidized copper cannot be used.
- a high condensing pressure acts periodically, so if a tube made of phosphorous deoxidized copper is used as the heat exchanger tube,
- the pressure resistance that is, the proof stress (0.2% proof stress) or yield stress of the heat transfer tube components is insufficient, and there is a possibility that cracks in the heat transfer tube and dimensional changes of the heat transfer tube may occur due to long-term use.
- Such a problem similarly occurs in a body plate or the like using a plate material. For example, for body plates used for heat exchange in water heaters, water heaters, etc., repeated stress due to expansion during use and shrinkage during non-use results in local fatigue failure.
- the fins provided on the heat transfer tubes of water heaters, air conditioners, etc. have a significant decrease in mechanical strength (especially resistance to power) during the manufacturing stage, so that a slight external force acts (for example, However, there is a risk that the fins may be easily deformed during maintenance (when the hand or cleaning tool is slightly touched during cleaning or the like), and the heat efficiency of the heat exchanger is greatly impaired due to the deformation of the fins.
- the parts and parts (water supply pipes, hot water supply pipes, gas pipes, electrical equipment pipes, chemical equipment pipes, etc.) of the attached phosphorous dewatering machine have a remarkable decrease in strength after the installation, so they are no longer necessary.
- the present invention has been made in view of the power, and may be heated (or heat-treated) to a high temperature by brazing or the like, and may be transferred to a heat exchanger using a heat medium gas other than HCFC-based chlorofluorocarbon.
- a heat-resistant copper alloy material that can be suitably used as a component (tube material, plate material, etc.) of products and components that require proof stress and high thermal conductivity, such as heat tubes. It is the purpose.
- a heat-resistant copper alloy material having the alloy composition described in claim 1 (hereinafter referred to as “first invention alloy material”) and a heat-resistant copper alloy material having the alloy composition described in claim 2
- Copper alloy material (hereinafter referred to as “second invention alloy material”)
- heat-resistant copper alloy material having the alloy composition described in claim 3 (hereinafter referred to as “third invention alloy material”)
- alloy described in claim 4 We propose a heat-resistant copper alloy material having a composition (hereinafter referred to as “the fourth invention alloy material”). All of these inventive alloy materials are provided as pipes, plates, rods, wires, or processed materials obtained by processing these into predetermined shapes (such as welding, welding, cutting, and pressing).
- parenthesized element symbols indicate the content values of the elements.
- the first invention alloy material has a Co of 0.15 to 0.33 ma ss% (preferably 0.16 to 0.30 mass%, more preferably 0.17 to 0.28 ma ss%).
- 0.041 to 0.29 ma ass% preferably 0.043 to 0.080 ma ss%, more preferably 0.045 to 0.074 mass%) % (Preferably 0.03 to 0.19 mass%, more preferably 0.04 to 0.15 ss%) and 0.01 to 0.40 mass% (preferably 0.02 ⁇ 0.25 ma ss%, more preferably 0.02 to 0.15 ma ss%), Zn content, Co content [C o] ma ss% and P content
- the second invention alloy material is 0.1 to 0.3 lmass% (preferably 0.13 to 0.28mass%, more preferably 0.15 to 0.26111 & 33%.
- P and 0 of 0.004 to 0.09 mass% (preferably 0.03 to 0.08 mass%, more preferably 0.04 to 0.074 mass%) 0.2 to 0.25 ma ss% (preferably 0.03 to 0.19 mass%, more preferably 0.04 to 0.15 ma ss%) Sn and 0.01 to 0.40 mass% (preferably 0.02 to 0.25 mass%, more preferably 0.02 to 0.15 mass%) Zn and 0.01 to 0.17 mass% (Preferably 0.02 to 0.14 mass%) and / or 0.01 to 0.15 mass% (preferably 0.02 to 0.12 mass%).
- the third invention copper alloy material has the alloy composition of the first invention alloy material
- the fourth invention alloy material has the alloy composition of the second invention alloy material, and any one of Mn, Mg, Zr, and Y, respectively. It is further contained.
- the third invention alloy material is 0.15 to 0.33 mass% (preferably 0.16 to 0.3 Omass%, more preferably 0.17 to 0.28 mass%).
- Co and P of 0.04 1 to 0.089 ma ss% (preferably 0.04 3 to 0.080 ma ss%, more preferably 0.04 5 to 0.0 74 ma ss%) 0.02 to 0.25 ma ss% (preferably 0.03 to 0.19 ma ss%, more preferably 0.04 to 0.15 mass%)
- Sn and 0.0 1 ⁇ 0.40 mass% preferably 0.02 to 0.25mass%, more preferably 0.02 to 0.15mass%)
- [Zr] mass% which has the following relationship (1) or (2), with the balance being an alloy composition consisting of Cu and unavoidable impurities.
- the fourth invention alloy material is 0.1 to 0.3 lm s s% (preferably 0.1
- A2 [Co] + 0.5 [P] + 0.9 [S n] + 0.1 [Z n] + 0.9 [N i] + 1.5
- Co is an essential element for suppressing the coarsening of crystal grains under high-temperature heating conditions (for example, heating conditions of about 800 ° C when weighing $) when manufacturing or using heat transfer tubes.
- the addition of Co makes it possible to favorably suppress the growth of crystal grains when heated to a high temperature (600 to 700 ° C or higher), to maintain the metal composition finely, and to increase the ⁇ ]
- the fatigue resistance of the alloy after P heating is improved.
- the effect of the addition of Co is not sufficiently exhibited when the addition amount is less than 0.15 mass%.
- Ni and Fe are co-added as in the second or fourth invention alloy material, as described later, Ni and Fe are required to exhibit the above-mentioned effect.
- the amount of Co added should be 0.30 mass% or less (when Ni and Fe are added together, the amount of Co must be 0.3%). It is preferable to set the value to 0.28 mass% or less, and it is most preferable to set it to 0.28 mass% or less (0.26 mass% or less when Ni and Fe are added together).
- P like Co
- P exhibits a function of suppressing the growth of crystal grains by heating at a high temperature, but its function is dramatically improved by co-addition with C0. Therefore, by adding P in addition to Co, the growth of crystal grains due to high-temperature heating is extremely effectively suppressed, and a fine crystal state is reliably maintained even after heating. Therefore, the effect of the addition of P is not effectively exerted when the addition amount is less than 0.041 mass%, and cannot be expected so much.
- the amount of P added must be 0.04 lma ss% or more, and in order to exert the effect sufficiently, it is preferably 0.043 ma ss% or more. It is optimal to set it to 045 mass% or more.
- Sn enhances the heat resistance of the matrix by solid solution strengthening in Matritus, and improves the growth suppression effect and the miniaturization effect of crystal grains by Co and P, as well as increases the precipitation rate of Co and P. It can improve the mechanical strength after high-temperature heating.
- Sn is also added to improve corrosion resistance. By adding Sn, corrosion such as stress corrosion cracking, pitting corrosion, and ant-nest corrosion is minimized. Can be prevented.
- the amount of addition must be 0.02 ma ss% or more, and is preferably 0.03 ma ss% or more. It is best to set it to ass% or more.
- the addition amount of 311 exceeds 0.25 mass%, the mechanical strength is improved to some extent according to the addition amount, but the thermal conductivity is reduced, and the deformation resistance during hot is increased. Cold workability also decreases.
- the addition amount of 311 it is necessary to keep the addition amount of 311 at 0.25 mass% or less, preferably 0.19 mass% or less, It should be 0.15 mass% or less;
- ⁇ is added to improve the mechanical strength by strengthening the matrix.
- the strength of the matrix itself is low, and in some cases, the mechanical strength of the alloy as a whole is naturally low. Is added to achieve.
- This is the same for S ⁇ , but the addition of ⁇ ⁇ has the effect of further improving the adhesion. That is, by adding ⁇ , the wettability with an adhesive such as copper (JISZ 3264) can be improved.
- Zn has the effect of improving the corrosion resistance to stress corrosion cracking, pitting, and ant-nest corrosion. Therefore, in order to exert the effect of such Zn-added kamuri, it is necessary that the amount of addition be 0.01 mass% or more, and 0.02 mass% or more.
- the amount of Zn added must be set to 0.4 Omass% or less, preferably 0.25 maSs% or less, and 0.15 maSs% or less. It is best to keep it below.
- F e and Ni have the same effect of suppressing crystal grains as Co, and although the effect is slightly inferior to C 0, they can function as an alternative element to Co. Therefore, by co-adding with Co, the above-mentioned effect can be sufficiently exhibited while reducing the amount of expensive C0 added as much as possible.
- Ni and Fe reduce the limit of solid solution of Co in the matrix and play the role of effectively exerting the above-mentioned Co function with a small amount of Co added. It has the economic effect of reduction. It also has the effect of increasing thermal conductivity and hot workability by reducing the amount of solid solution of Co.
- the effect of the addition of Ni and Fe is exerted when the amount of Ni or Fe added is at least 0.01 ma ss%, and is more remarkable when the addition amount is at least 0.02 ma ss%. Will be demonstrated.
- the addition amount of Ni needs to be 0.17 mass% or less, preferably 0.14 mass% or less, and Fe Should be 0.15 mass% or less, and preferably 0.12 ni ass% or less.
- the scrap material (such as a waste heat transfer tube) is often used as a part of the raw material for producing the invention alloy material, and such scrap material sometimes contains the S component (sulfur component).
- S component sulfur component
- the precipitate (MgS, ZrS, etc.) combined with the S component can be used. ).
- the above problem can be prevented from occurring.
- the third or fourth invention alloy material contains any of Mn, Mg, Y, and Zr for such a reason. I'm supposed to.
- the effect of forming the above precipitates by adding Mn, Mg, Y, and Zr is exhibited by adding Mn in an amount of 0.01 mass% or more.
- Mg, Y, and Zr are exhibited by adding at least 0.001% ss%.
- adding Mn, Mg, Y, and Zr more than necessary may not only obtain an effect commensurate with the amount added, but also cause adverse effects such as lowering the thermal conductivity.
- the upper limit of the amount is 0.20 mass% (preferably 0.10 mass%) for Mn, and 0.1 Oma ss% (preferably 0.04 ss%) for Mg, Mn, Y, and Zr. ) Is appropriate.
- the additional elements other than Cu which is the basic element
- their contents are determined within the above range, but in the determination, it is necessary to consider the mutual relationship between the additional elements, thereby achieving the object of the present invention.
- Co addition and P addition are closely related to each other as described above, and it is necessary to balance the effects of Co and P co-addition. However, it is not sufficient to determine their contents independently in the above range, and it is necessary to determine the ratio of both contents within a certain range .
- Ni and Fe also have the same functions as Co and function as substitute elements for Co. It is necessary to determine in consideration of the relationship. That is, it is necessary to determine the Co content or the Co, Ni, Fe content and the P content so that the relationship of (1) is established between them. In the case of, the co-addition effect of Co, Ni, Fe and P is insufficient, and the thermal conductivity, which is the original characteristic of the copper alloy, is impaired. become worse.
- Ni and Fe function as substitutes for C o, but their function only replaces a part of the required content of o and reduces the required content of C o Therefore, the content of Ni and Fe should be determined in consideration of the relationship with the content of Co. Therefore, the contents of Co, Ni, and Fe should be determined so that the total amount A3 and the interrelationship satisfy the conditions of (3) to (6), taking into account the degree of function contribution. That is, if A3 is 0.15, the effect of adding Co, Ni, and Fe (such as the effect of suppressing the growth of crystal grains during high-temperature heating) is not sufficiently exhibited, and A3> 0.35.
- the total amount of the additional elements other than the basic element Cu taking into account the contribution of the addition effect, is A2, and the thermal conductivity, hot extrudability, bending workability, formability, adhesiveness, and adhesion It is necessary to determine the amount to be added so as to satisfy the condition of (2) in consideration of such a point because it affects later strength. That is, if A2> 0.54, the thermal conductivity, hot extrudability, bending workability, and formability decrease. Therefore, In order to ensure thermal conductivity, hot extrudability, bending workability, and formability, it is necessary that A2 ⁇ 0.54.
- a 2 ⁇ 0.49 In order to surely prevent the decrease of A, it is preferable that A 2 ⁇ 0.49, and it is most preferable that A 2 ⁇ 0.45.
- A2 is 0.20, sufficient strength after welding cannot be obtained. Therefore, to ensure sufficient strength after welding, it is necessary that A2 ⁇ 0.20, preferably A2 0.23, and most preferably A2 0.26 .
- oxygen contained as an unavoidable impurity if its content is above a certain level, may cause hydrogen embrittlement.Therefore, it is necessary to keep the oxygen content below 0.007 mass%. However, it is preferable to set the content to 0.004 mass% or less. Such reduction of the oxygen content can be achieved not only by the production conditions but also by the effect of adding 1P. Therefore, in the first to fourth invention alloy materials as well, the P content should be determined so that the oxygen content is 0.007 mass% or less (preferably 0.004 mass% or less). preferable.
- the first to fourth invention alloy material, ⁇ with products requiring ⁇ Ka components (e.g., the heat exchanger using the HCFC-type fluorocarbon other than the heat medium gas (C0 2, HFC-type fluorocarbon, etc.)
- the heat exchanger using the HCFC-type fluorocarbon other than the heat medium gas (C0 2, HFC-type fluorocarbon, etc.) When using as a heat transfer tube or as a component of fins, water supply pipes, etc., which are likely to be deformed by slight external forces during use during maintenance, determine the above alloy composition by using a brazing treatment or equivalent conditions. 0.2% proof stress after heat treatment (for example, heat treatment at 800 ° C for 10 minutes).
- the strength is determined to be 55 NZmm 2 or more (preferably 75 N / mm 2 or more, more preferably 9 ON / mm 2 or more).
- the soldering of copper alloy materials is generally called hard soldering. As specified in JISZ 3264, the soldering temperature at around 800 ° C using phosphorous copper or silver is considered. The attachment time is generally about 10 minutes).
- the material to be coated is also heated to a temperature at which the material to be melted is melted, and the copper alloy material to be bonded (material to be coated) is heated to approximately the same temperature as the bonding temperature. Will be. Therefore, in the present invention, the soldering treatment of the copper alloy material and the same conditions (800 ° C Before and after), both are treated as the same heat treatment without distinguishing from the general heat treatment that directly heats the copper alloy material.
- the first to fourth invention alloy materials exhibit good thermal conductivity by forming the above-mentioned alloy composition, and are frequently used as components of products and parts that require high thermal conductivity. It is superior in strength to pure copper (JISC 1220) and pure aluminum, but in order to make it a superior material over pure copper or pure aluminum as a component of such products and parts, at least pure aluminum ( Thermal conductivity: 0.57 cal Zcm 'sec' ° C) It is necessary to ensure higher thermal conductivity, pure aluminum and pure copper (thermal conductivity: 0.78 cal / cm 'sec ⁇ ° C) It is preferable that a thermal conductivity of at least the intermediate value (0.675 cal / cm-sec-° C) can be secured, and a thermal conductivity of 0.70 cal / cm 'sec' ° C or more is reliably obtained.
- the present invention provides the first to fourth invention alloys whose heat conductivity has been dramatically improved by performing the following heat treatments (such as heat treatment) and post-treatments. Propose materials.
- first post-treatment proposes first to fourth invention alloy materials having improved thermal conductivity. That is, in such post-treatment (hereinafter referred to as “first post-treatment”), the furnace cooling rate is changed according to the furnace cooling temperature, and the cooling rate from 670 ° C to 480 ° C is 1.5 to: Decelerate to 12 ° CZ min (preferably 2.5 to 10 ° C / min).
- the cooling rate in the furnace cooling process is usually 15-30 ° 0 minutes (usually about 20 ° C / minute), but in the first post-treatment, the cooling rate is 670 ° C to 480 ° C in the furnace cooling process. ° C temperature range
- the cooling rate is reduced as compared with the general furnace cooling treatment, and the thermal conductivity can be improved by maintaining the temperature at around 580 ° C.
- a general furnace cooling treatment and post-treatment are applied to the heat treatment material.
- a general furnace cooling treatment and post-treatment are applied to the heat treatment material.
- the first to fourth invention alloy materials with improved thermal conductivity by applying heat treatment and special reheating treatment. That is, in such post-treatment (hereinafter referred to as “second post-treatment”), the heat-treated material is furnace-cooled under general conditions, but before or after the furnace-cooling step is completed. Reheating is carried out under the conditions of 670 ° C, 3 to; L00 minutes (preferably, 520 to 640 ° C, 10 to 40 minutes).
- the thermal conductivity can be improved to be equal to or higher than that in the case of performing the first post-treatment.
- the heat-treated material is subjected to quenching treatment and reheating treatment as post-treatment.
- the present invention proposes first to fourth invention alloy materials having improved thermal conductivity and strength.
- the heat-treated material is rapidly cooled by water cooling or air cooling (including forced air cooling), and then reheated in the same manner as in the second post-treatment. (Reheating under the conditions of 480 to 670 ° C, 3 to 100 minutes (preferably 52 to 640 ° C, 10 to 40 minutes)).
- the inventor has found that when reheating a heat-treated material under predetermined conditions, the cooling condition (mainly, cooling rate) of the heat-treated material does not significantly affect the improvement of the thermal conductivity (heat conductivity). It was confirmed that the improvement in the properties mainly depends on the reheating conditions), and that the reheating after quenching improves the strength as compared with the case of reheating after furnace cooling.
- the third post-processing as described above is extremely advantageous.
- the first to fourth invention alloys described above are pipes constituting a heat exchanger tube of a heat exchanger (particularly, a heat exchanger tube for heat exchange using a heat medium gas other than HCFC-based fluorocarbon). It is preferably used as a copper alloy pipe or a welded copper alloy pipe, and Suitable as a plate-like component (fin, body plate, flange, etc.) for a heat exchanger or a connecting plate for connecting it to a heat transfer tube or another plate-like component (fin, etc.) It is.
- a cylindrical ingot (diameter 220 mm, length 275 mm) having the alloy composition shown in Tables 1 to 3 was heated to 900 ° C, extruded into a tube while hot, and the extruded tube was continuously connected. Immersed in a hot water bath at 60 ° C, repeatedly drawn in the cold, and heat-treated (annealed) the drawn tube at 630 ° C for 1 hour to obtain an outer diameter of 10 mm and a wall thickness of lmm. (It can be used as a component of heat exchanger heat transfer tubes.) 1st invention alloy material No. 10l to No. 114, 2nd invention alloy material No. 20l to No. 217, 3rd invention alloy material Invention alloy materials No. 301 to No. 304 and fourth invention alloy material No. 401 to No. 412 were manufactured.
- an extruded tube with an outer diameter of 65 mm and a wall thickness of 5.5 mm (hereinafter referred to as “small-diameter extruded tube”) is obtained by hot extrusion, and cold drawing is repeatedly performed on this.
- a drawing tube with an outer diameter of 10 mm and a wall thickness of 1 mm was obtained.
- the first and second invention alloy materials No. 103, No. 114, No. 204, No. 211 and No. 215 is it possible to obtain an appropriate small-diameter extruded tube?
- the extruded pipe with an outer diameter of 85 mm and a wall thickness of 7.0 mm (hereinafter referred to as “large The diameter of the extruded tube” and cold drawing is repeatedly performed to obtain a drawn tube having the same shape as above (outer diameter 10 mm, wall thickness 1 mm).
- a prismatic block (thickness: 35 mm, width: 90 mm, length: 250 mm) is cut out from the cylindrical block (diameter: 220 mm, length: 275 mm). Heated to 850 ° C, hot-rolled into a 5 mm-thick plate, cold-rolled this hot-rolled plate to a thickness of 0.41 mm after pickling its surface After further heat treatment (annealing) at 630 ° C for 1 hour, cold finish rolling is performed to a thickness of 0.40 mm to obtain the alloy compositions shown in Tables 1 to 3. Sheet material 1st invention alloy material No. 101 to No. 114, 2nd invention alloy material No. 201 to No. 217, 3rd invention alloy material No. 301 to No. 304, and 4th invention alloy material No. 401 to No. 412 were produced. In addition, the content of oxygen as inevitable impurities in the above-mentioned tube material and plate material was 0.0002 to 0.004 mass% in all cases.
- a copper alloy material having an alloy composition shown in Table 4, which is a tube material and a plate material having the same shape by the same manufacturing process as the example alloy material N 0.5 ° No. 515 was obtained.
- the tube materials No. 501 to No. 503 and No. 510 to No. 513 were obtained by drawing and heat-treating a small-diameter extruded tube.
- Tube material No. 515 was obtained by drawing and heat treating a large-diameter extruded tube.
- the hot extrudability is extremely poor, and small and large diameter extruded pipes cannot be obtained. I could't do that.
- the first invention alloy material No. 101 to No. 114, the second invention alloy material No. 20 l to No. 217, the third invention alloy material No. 30 l to No. 304, the fourth invention alloy The extrudability of material Nos. 401 to 412 and comparative example alloy materials 501 to 515 was evaluated by bending of an extruded pipe, which is an intermediate product in the process of producing the pipe. The results were as shown in Tables 5 to 8. In other words, Tables 5 to 8 show that a small-diameter extruded tube (outer diameter 65 mm, wall thickness 5.5 mm) whose bend after hot extrusion was less than the reference value (10 cm per lm) was obtained.
- the small diameter extruded tube was not able to be obtained as shown by “ ⁇ ” as having excellent extrudability, but the large diameter extruded tube (outside diameter 85 mm, wall thickness 7 0 mm) is indicated by “ ⁇ ” as having good extrudability (no problem in practical use), and the bending value is the standard value for not only small-diameter extruded pipes but also bends.
- the ones for which the following large-diameter extruded tubes could not be obtained were indicated by “X” as those with poor extrudability (unusable ones).
- the first invention alloy material No. 101 to No. 114 obtained as the tube material, the second invention alloy material No. 201 to No. 211, the third invention alloy material No. No. 301 to No. 304, Fourth Invention Alloy No. 401 to No. 4 12 and Comparative Alloy No. 501 to No. 5 15
- the following resistance test was conducted on the comparative alloy materials (except for No. 504 to No. 509 and No. 514), where Done.
- the tube material (a drawn tube with an outer diameter of 10 mm and a wall thickness of 1 mm, annealed at 63 ° C for 1 hour) was made into a heat exchanger (heat transfer tubes, fins, body plate, The heat treatment was performed by passing through a continuous heat treatment furnace under the same conditions as those used in the in-furnace mounting method adopted for mounting heat exchange parts such as flanges. Specifically, the tube was heated at 800 ° C for 10 minutes and then cooled at 20 ° C / min. The heat-treated pipes were subjected to a tensile test using an Amsula 1-type universal testing machine to measure 0.2% resistance (strength when the permanent set becomes 0.2%). The results were as shown in Tables 5 to 8.
- the first invention alloy material No. 1 obtained as a sheet material (which was annealed at 630 ° C. for 1 hour and then cold finish-rolled to a thickness of 0.40 mm).
- the same power resistance measurement test as described above was conducted for the same, but the results were almost the same as the measured values (0.2% power resistance) shown in Tables 5 to 8, and a description thereof will be omitted.
- the first invention alloy material No. 101 to No. 114 obtained as the tube material, the second invention alloy material No. 201 to No. 211, the third invention alloy material N No. 301 to No. 304, 4th invention alloy No. 401 to No. 412 and comparative example alloy No. 501 to No.
- the bending workability of the comparative alloy materials No. 504 to No. 509 and No. 514 which could not be obtained was confirmed.
- the evaluation of the bending performance was performed by using a drawn pipe with an outer diameter of 10 mm and a wall thickness of l mm.
- the first invention alloy materials No. 101 to No. 114, the second invention alloy materials No. 201 to No. 217, the third invention alloy materials No. 301 to No. 304 obtained as plate materials
- the fourth invention alloy material No. 40 l to No. 412 and the comparative example alloy material No. 50 l to No. 515 excluding No. 504 to No. 509 and No. 514
- An Erichsen test was performed to confirm the moldability. That is, an Erichsen test was performed on a sheet material (which was annealed under the condition of 630 V for 1 hour and cold-rolled to a thickness of 0.40 mm) to obtain an Erichsen value.
- the results are as shown in Tables 5 to 8.
- first invention alloy materials No. 101 to No. 114, the second invention alloy materials No. 201 to No. 217, the third invention alloy materials No. 301 to No. 304, obtained as tube materials, Fourth Invention Alloy No. 401 to No. 412 and Comparative Alloy No. 501 to No. 515 (Comparative Alloy No. 504 to No. 509, No. 509, No.
- the furnace was cooled at 20 ° C / min.
- the sheet was passed through a continuous heat treatment furnace to perform a heat treatment for soldering, and the thermal conductivity was measured.
- the results are as shown in Tables 5 to 8, the first invention alloy material No. 101 to No. 114, the second invention alloy material No. 201 to No. 217, the third invention alloy material Regarding No. 30 l to No. 304 and the fourth invention alloy material No. 401 to No. 412, in all of them, a high thermal conductivity of 0.65 ca 1 / cm Excellent thermal conductivity was confirmed.
- each of post-treatments was performed on 30 l to No. 304 and the fourth invention alloy material No. 401 to No. 412, and the thermal conductivity and strength after the post-treatment were measured. That is, the pipe materials No. 101 to No. 114, No. 201 to No. 217, No. 301 to No. 304 and No. 401 to No. 412 were respectively subjected to the same conditions as the above-mentioned heat treatment for welding ( (Heating temperature: 800 ° C, heating time: 10 minutes), and heat-treated tubing (hereinafter referred to as “heating tubing”) is subjected to the following first post-treatment, second post-treatment, or third post-treatment. Processing was performed. In the first post-treatment, in the furnace cooling process of the heating tube material The cooling rate from 670 ° C to 480 ° C was reduced to 4 ° C / min. In addition, 6 from 800 ° C
- the furnace cooling rate up to 70 ° C and the furnace cooling rate from 480 ° C to room temperature were set to 20 ° CZ.
- the heated tubing was furnace-cooled to room temperature at 20 ° CZ and then reheated at 580 ° C for 30 minutes.
- the furnace cooling rate after reheating was set to 20 ° C / min.
- the heated tube was water-cooled (rapidly cooled) and then re-heated at 580 ° C for 30 minutes as in the second post-treatment.
- the thermal conductivity after these heat treatments was as shown in Tables 5 to 7.
- the first to third post-treatments were performed under a plurality of different conditions, and the thermal conductivity after the heat treatment under each condition was measured. That is, in the first post-treatment, the cooling rate from 670 ° C to 480 ° C was set as described above4. In addition to the case where the amount was reduced to C / min, the cases where the amount was reduced to 1.8 ° C / minute, 2.5 ° CZ minute, 6 ° CZ minute, 10 ° C / minute and 12 ° CZ minute were respectively performed.
- the second post-treatment and the third post-treatment were carried out at 580 ° C for 30 minutes as described above, and 480. C, 100 minutes, 520. C, 50 minutes, 580 ° C, 10 minutes, 580 ° C, 50 minutes, 640 ° C, 30 minutes, 640 ° C, 10 minutes and 670. C and 3 minutes were also performed respectively.
- the thermal conductivity after these heat treatments was as shown in Tables 9 to 11.
- the reheating conditions were 520 ° C, 50 minutes, 580 ° C, 30 minutes, and 640 ° C, 30 minutes.
- tensile tests were carried out using an all-purpose universal testing machine, and their strength, that is, the 0.2% proof stress was measured. The results were as shown in Table 12.
- each tube was heat-treated under the same conditions as the above-mentioned heat treatment for bonding, and then the heat-treated tube was flattened to a thickness of 4 mm to obtain a flat test piece.
- the following stress corrosion cracking test was performed on each flat specimen.
- each flat test piece was exposed for 48 hours in a gas phase portion in a desiccator filled with 12% aqueous ammonia to measure the stress crack length of the flat test piece.
- the crack length on the outer surface and the crack length on the inner surface in the longitudinal section are observed and measured with a microscope, and the crack length on the outer surface is determined.
- the sum of the maximum value and the maximum value of the inner surface side crack length was defined as the stress corrosion crack length (mm).
- each flat test piece was adjusted to have a surface area of 100 cm 2, and then heated to 75 ° C with 1 L sulfuric acid solution 1 L and 1% hydrochloric acid solution. Each sample was immersed in 1 L for 48 hours, and the weight difference (mg) of the flat test piece before and after immersion, that is, the weight loss (mg) due to dissolution was measured.
- the heat treatment of the heated tubing material is significantly higher when the first to third post-treatments are performed than when only the heat treatment for mounting is performed. It has been confirmed that the conductivity is improved, and that the first to third heat treatments can dramatically improve the thermal conductivity. In addition, the improvement in thermal conductivity between the case where the second post-treatment was performed and the case where the third post-treatment was performed was almost the same. It was confirmed that the improvement in thermal conductivity did not affect the improvement in thermal conductivity, and that the improvement in thermal conductivity depended on the reheating conditions. In particular, in the case of the third post-treatment, not only the thermal conductivity but also the strength (0.2% resistance to heat) are improved, as is clear from Table 12. It was confirmed that high cooling rate and rapid cooling are effective for improving strength.
- invention alloy materials No. 104, No. Ill, No. 210, No. 2 1, 2, No. 2 15, No. 2 17, and No. 30 1, No. 402, No. 406 and No. 408 have extremely short stress corrosion cracking lengths compared with the comparative alloy materials No. 501, No. 503 and No. 5 12 Both in 1% sulfuric acid and 1% hydrochloric acid, the weight loss due to dissolution is reduced. Or From this point, the alloy material of the present invention can effectively prevent and suppress stress corrosion cracking, pitting corrosion, ant nest corrosion and the like due to coarsening of crystal grains, and is also excellent in corrosion resistance. Is understood.
- Example 108 96 o o 12.2 0.72 0.75 0.75 0.74
- Gold 109 90 o ⁇ 12.0 0.70 0.72 0.73 0.73
- Example 405 100 o ⁇ 12.1 0.69 0.72 0.72 0.72 4th invention 406 95 o ⁇ 12.0 0.67 0.70 0.71 0.71 Alloy 407 98 o ⁇ 12.0 0.68 0.71 0.70 0.70
- the heat-resistant copper alloy material of the present invention does not coarsen crystal grains even when heated to a high temperature (600 to 700 ° C or higher).
- the original properties of the alloy do not decrease, and it is effectively prevented from stress corrosion cracking, pitting corrosion, ant nest corrosion, etc. due to coarsening of crystal grains. , Can be suppressed. Therefore, according to the heat-resistant copper alloy material of the present invention, it is exposed to a high temperature of 600 to 700 ° C or more during production or use (for example, It is heated to around 800 ° C).
- the durability and service life of various products and parts such as heat exchanger tubes, fins, shell plates, flanges, etc.
- heat exchangers can be improved by using general phosphorous deoxidized copper. It is possible to provide a heat transfer tube and the like that can exhibit a sufficient corrosion resistance even under conditions such as stress corrosion cracking, pitting corrosion, ant nest corrosion, etc. .
- the pipe material can be suitably used as a constituent material of a heat transfer tube of a heat exchanger that uses a heat medium gas other than HCFC-based fluorocarbon, and is compared with the case where a well-known heat-resistant copper alloy material is used. The use is expected to expand significantly.
- the plate material can be suitably used as a component material such as fins provided in a heat transfer tube of a water heater, an air conditioner, or the like, and problems when using a known heat-resistant copper alloy material (for example, cleaning).
- the fins are deformed by a small external force and the thermal efficiency of the heat exchanger is greatly impaired), and the function and durability of plate-like products and parts can be greatly improved.
- heat exchangers such as instantaneous water heaters, hot water heaters, water heaters, air conditioners, refrigerators, radiators, and the like, and heat exchangers provided in hot water supply systems, air conditioning systems, refrigeration systems, and the like are provided.
- Heat transfer pipes or pipes water supply pipes, hot water supply pipes, gas pipes), other equipment (electrical, chemical equipment, etc.) pipes, or their attached parts, equipment (four-way valve for switching between cooling and heating), etc. It is possible to provide a heat-resistant copper alloy material that is suitably used as a constituent tube material, plate material, rod material, wire material, or processed material (formed into a predetermined shape by welding, welding, cutting, pressing, or the like).
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DE60324711T DE60324711D1 (ja) | 2003-03-03 | 2003-09-19 | |
AU2003264537A AU2003264537A1 (en) | 2003-03-03 | 2003-09-19 | Heat-resisting copper alloy materials |
JP2004569115A JP3878640B2 (ja) | 2003-03-03 | 2003-09-19 | 耐熱性銅合金材 |
US10/529,804 US7608157B2 (en) | 2003-03-03 | 2003-09-19 | Heat resistance copper alloy materials |
EP03816172A EP1630240B1 (en) | 2003-03-03 | 2003-09-19 | Heat-resisting copper alloy materials |
KR1020037014726A KR100576141B1 (ko) | 2003-03-03 | 2003-09-19 | 내열성 동합금재 및 그 제조방법 |
US12/555,990 US10266917B2 (en) | 2003-03-03 | 2009-09-09 | Heat resistance copper alloy materials |
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EP2246448B1 (en) | 2008-02-26 | 2016-10-12 | Mitsubishi Shindoh Co., Ltd. | High-strength high-conductive copper wire |
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WO2010079707A1 (ja) | 2009-01-09 | 2010-07-15 | 三菱伸銅株式会社 | 高強度高導電銅合金圧延板及びその製造方法 |
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- 2003-09-19 US US10/529,804 patent/US7608157B2/en active Active
- 2003-09-19 KR KR1020037014726A patent/KR100576141B1/ko active IP Right Grant
- 2003-09-19 WO PCT/JP2003/012041 patent/WO2004079026A1/ja active Application Filing
- 2003-09-19 DE DE60324711T patent/DE60324711D1/de not_active Expired - Lifetime
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US10266917B2 (en) | 2003-03-03 | 2019-04-23 | Mitsubishi Shindoh Co., Ltd. | Heat resistance copper alloy materials |
JP2009530581A (ja) * | 2006-03-23 | 2009-08-27 | ヴィーラント ウェルケ アクチーエン ゲゼルシャフト | 熱交換器管の使用方法 |
JP2008151422A (ja) * | 2006-12-18 | 2008-07-03 | Daikin Ind Ltd | 熱交換器 |
JP2008240128A (ja) * | 2007-03-29 | 2008-10-09 | Kobelco & Materials Copper Tube Inc | 銅合金管 |
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JPWO2012060359A1 (ja) * | 2010-11-02 | 2014-05-12 | 三菱伸銅株式会社 | 銅合金熱間鍛造品及び銅合金熱間鍛造品の製造方法 |
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JP2017190479A (ja) * | 2016-04-12 | 2017-10-19 | 三菱マテリアル株式会社 | 銅合金製バッキングチューブ及び銅合金製バッキングチューブの製造方法 |
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Also Published As
Publication number | Publication date |
---|---|
TWI254745B (en) | 2006-05-11 |
JP3878640B2 (ja) | 2007-02-07 |
ATE414182T1 (de) | 2008-11-15 |
US10266917B2 (en) | 2019-04-23 |
EP1630240A4 (en) | 2007-06-20 |
US20090320964A1 (en) | 2009-12-31 |
US20060260721A1 (en) | 2006-11-23 |
CN1568375A (zh) | 2005-01-19 |
AU2003264537A1 (en) | 2004-09-28 |
JPWO2004079026A1 (ja) | 2006-06-08 |
DE60324711D1 (ja) | 2008-12-24 |
KR100576141B1 (ko) | 2006-05-03 |
EP1630240B1 (en) | 2008-11-12 |
CN1296500C (zh) | 2007-01-24 |
KR20040100838A (ko) | 2004-12-02 |
US7608157B2 (en) | 2009-10-27 |
EP1630240A1 (en) | 2006-03-01 |
TW200417616A (en) | 2004-09-16 |
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