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
• • 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
  • C22C9/01—Alloys based on copper with aluminium 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
• • 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

Definitions

• the present invention relates to a copper alloy mainly composed of copper, a cold-rolled plate material made of a copper alloy, and a method for producing a cold-rolled plate material.
• Copper alloys have been used in a wide range of fields such as electronic parts, ornaments, and corrosion-resistant members, taking advantage of their excellent strength, thermal conductivity, electrical conductivity, corrosion resistance, wear resistance, etc.
• a Cu—Al—Ni-based copper alloy called aluminum bronze is known for its high strength and good corrosion resistance and wear resistance.
• Patent Document 1 discloses a high-strength copper alloy that is a high-strength copper alloy that is used as a material for spacers and the like used in transmission gears and motor rotors of automobile transmission mechanisms, and that requires wear resistance.
• As an alloy 4 to 8 wt% Al, 0.5 to 5 wt% Ni, 0.5 to 5 wt% Fe, 0.01 to 0.5 wt% Cr, 0.01 to 0.5
• a wear-resistant high-strength copper alloy has been proposed that contains wt.% Mn and 0.1-5 wt.% Zn, with the balance being Cu and inevitable impurities.
• Patent Document 2 as a copper alloy having good conductivity, excellent corrosion resistance and mechanical strength, 1 to 7% by weight of Al, 1.5 to 6% by weight of Ni, and 0.5 to 5% by weight of Fe are disclosed.
• a precipitation hardening type copper alloy comprising 0.1 to 2.5 wt% Mn, 0.001 to 0.05 wt% B, 0.5 to 8 wt% Zn and the balance Cu has been proposed.
• Patent Document 3 as aluminum bronze for decoration, in addition to 5 to 7% by weight of Al, 0.2 to 1.5% by weight of Ni, 0.2 to 1.0% by weight of Fe, 0.05% Two or more of ⁇ 0.1 wt% Mn, 0.01 ⁇ 0.05 wt% Cr, 0.002 ⁇ 0.005 wt% Ge, 0.002 ⁇ 0.005 wt% Ti
• the aluminum bronze containing the balance Cu is also 5 to 7% by weight Al, 0.2 to 1.5% by weight Ni, 0.01 to 0.05% by weight Cr, 0.0025 to 0.
• An aluminum bronze composed of 005 wt% Si, 0.002 to 0.005 wt% Ti and the balance Cu has been proposed.
• Patent Document 4 as aluminum bronze excellent in corrosion resistance, discoloration resistance, castability, and spreadability, 5 to 9 wt% Al, 0.2 to 4 wt% Ni, 0.01 to 0.2 wt% % Cr, 0.1 to 0.5 wt% Fe, 0.0025 to 0.2 wt% Be, 0.001 to 0.01 wt% Ti, 0.0025 to 0.2
• Aluminum bronze has been proposed that contains two or more of the weight percent Ge, with the balance being essentially Cu.
• Patent Document 5 discloses 5 to 9% by weight of Al and 1 to 4% by weight of Ni as an alloy having discoloration resistance and suitable for arts and crafts, jewelry, tableware, wrought material, castings, and the like.
• 0.005-0.3 wt% In 0.1-0.5 wt% Mn, 0.001-0.01 wt% Co, 0.0025-0.2 wt% Be, 0.001 to 0.01 wt% Ti, 0.05 to 0.2 wt% Cr, 0.001 to 0.5 wt% Si, 0.005 to 0.5 wt% Zu,
• Patent Document 1 An attempt is made to improve workability by adding 0.01 to 0.5% by mass of Cr and 0.1 to 5% by mass of Zn in a Cu—Al—Ni based copper alloy. However, the processability is not sufficient. Also in Patent Document 2, Cu—Al—Ni based copper alloy contains B in a range of 0.001 to 0.05 mass% and Zn in a range of 0.5 to 8 mass%.
• Cu-Al-Ni-based copper alloys are often used as thick materials such as cast articles and forged products, and are used as strips and thin plate materials obtained by cold working. In reality, the upper limit is actually set.
• the present invention has been made in view of such problems, and improves the cold workability of a Cu-Al-Ni-based copper alloy, which has been considered difficult to cold work, and is made thin and striped. It is an object of the present invention to provide a Cu—Al—Ni based copper alloy, a cold rolled sheet material made of the alloy, and a method for producing the cold rolled sheet material.
• the copper alloy of the present invention contains 1 to 7% by mass of Al, 2 to 4% by mass of Fe, 0.8 to 4% by mass of Ni, and 0.5% by mass or less.
• This copper alloy has a composition comprising Mn and the balance of Cu and inevitable impurities.
• the copper alloy may further contain 0.1% by mass or less of Zn.
• Another aspect of the present invention is a cold-rolled sheet material, which includes 1 to 7% by mass of Al, 2 to 4% by mass of Fe, and 0.8 to 4% by mass of Ni.
• the copper alloy may further contain 0.1% by mass or less of Zn.
• Another aspect of the present invention is a method for manufacturing a cold-rolled sheet material, which includes 1 to 7 mass% Al, 2 to 4 mass% Fe, and 0.8 to 4 mass%.
• a hot rolling process for heating the chunk and hot rolling to obtain a rolled material, an annealing process for annealing the rolled material, and cold rolling after the annealing process to obtain a cold rolled material by cold rolling A method for producing a cold-rolled sheet material.
• the copper alloy may further contain 0.1% by mass or less of Zn.
• the workability can be improved while maintaining the strength and corrosion resistance levels of the conventional materials. Therefore, the thin plate and the strip can be easily formed, and a wide range of strength, corrosion resistance, and wear resistance is required. It becomes possible to apply to the field. As a result, a copper alloy having excellent workability by cold rolling can be provided. Moreover, the cold-rolled board
• [Al] Al is an element that reinforces the parent phase of the copper alloy mainly by solid solution strengthening and improves the corrosion resistance.
• the Al content in the copper alloy is less than 1% by mass, the effect of improving the strength and the corrosion resistance cannot be expected.
• the Al content exceeds 7% by mass, the strength of the copper alloy is improved, but the toughness and ductility are lowered, and particularly the cold workability is deteriorated. Therefore, in the present invention, the content of Al in the copper alloy is set to 1 to 7% by mass.
• the lower limit of the Al content is desirably 4% by mass and the upper limit is 7% by mass, the lower limit is 5% by mass, and the upper limit is 6% by mass. Is more desirable.
• [Fe] Fe is important for refining the structure of the copper alloy.
• the strength, wear resistance, fatigue strength and the like of the copper alloy can be improved.
• the effect of refining the structure can be expected to some extent during casting.
• the Fe content is less than 2% by mass, effects such as improvement in strength, wear resistance and fatigue strength cannot be obtained sufficiently.
• the Fe content exceeds 4% by mass, the cold workability deteriorates. Therefore, the Fe content is determined to be 2 to 4% by mass.
• Ni When Ni is added together with Fe, the solubility of Fe in the copper alloy is increased, and the effect obtained by adding Fe is enhanced. Ni improves the proof stress of the copper alloy, but improves the wear resistance particularly at high temperatures. When the Ni content is less than 0.8% by mass, such an effect is insufficient. On the other hand, when the Ni content exceeds 4% by mass, the ductility is lowered, so that the workability is lowered. Invite. Therefore, the Ni content is determined to be 0.8 to 4% by mass.
• [Mn] Mn can stabilize the ⁇ phase.
• the content of Mn exceeds 0.5% by mass, it is disadvantageous from the viewpoint of not the workability but the corrosion resistance of the thin plate. For this reason, the content of Mn is determined to be 0.5% by mass or less.
• Mn is dissolved in the ⁇ phase and contributes to the improvement of strength and wear resistance.
• the effect cannot be obtained at 0.01% by mass or less, whereas if it exceeds 0.5% by mass, the corrosion resistance is deteriorated. Therefore, the content of Mn is preferably 0.01% by mass at the lower limit and 0.5% by mass at the upper limit.
• [Zn] Zn like Mn, dissolves in the ⁇ phase and contributes to improvement in strength and wear resistance. Therefore, when further improving the strength and wear resistance of the copper alloy, it can be added as necessary. If the Zn content exceeds 0.1% by mass, the toughness and corrosion resistance are lowered, so the Zn content is 0.1% by mass or less.
• the lower limit of the Zn content is preferably 0.01% by mass in which the effect of addition is recognized.
• the thickness of the cold-rolled sheet material made of a copper alloy having the composition of the above alloy components may be 1 to 2 mm.
• the cold-rolled sheet material of the present invention is excellent in mechanical properties, has a tensile strength of 350 to 690 MPa, a proof stress of 230 to 440 MPa, and an elongation of 25 to 40%.
• the manufacturing method of the cold rolled sheet material of the present invention includes at least a hot forging process, a hot rolling process, an annealing process, and a cold rolling process.
• the hot forging step includes 1 to 7% by mass of Al, 2 to 4% by mass of Fe, 0.8 to 4% by mass of Ni, 0.5% by mass or less of Mn, the balance being Cu and This is a step of hot forging a copper alloy ingot having a composition composed of inevitable impurities into a thick plate-like ingot.
• the hot rolling step is a step of heating the piece and hot rolling to obtain a rolled material.
• the annealing step is a step of annealing the rolled material.
• the cold rolling step is a step of cold rolling after the annealing step to obtain a cold rolled material.
• the manufacturing method of the cold rolled sheet material of the present invention may further include a final annealing step in the cold rolled material in addition to the above steps.
• Cu, Al, Fe, Ni, Mn and Zn were blended so as to have a predetermined component composition, which was melted in a melting furnace to obtain a molten metal.
• This molten metal was cast using a mold to produce a cylindrical copper alloy ingot having a diameter of about 70 mm and a height of about 80 mm.
• Table 1 shows the component composition of the copper alloy ingot of the present invention.
• raw material components were blended so as to have a predetermined component composition, and a molten metal melted in a melting furnace was cast to produce a copper alloy ingot having a component composition of a comparative example shown in Table 2.
• the cold workability of a Cu—Al—Ni-based copper alloy which has been considered difficult to cold work, is improved, and the mechanical properties comparable to conventional materials are achieved. Since the copper alloy provided can be provided, it is possible to reduce the thickness and length of the strip, thereby enabling expansion and advancement in a wider range of fields.

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• 2015
  • 2015-05-13 WO PCT/JP2015/063756 patent/WO2016002352A1/ja active Application Filing
  • 2015-05-13 CN CN201580035508.8A patent/CN106471144B/zh not_active Expired - Fee Related
  • 2015-05-28 JP JP2015108703A patent/JP5887449B2/ja not_active Expired - Fee Related

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