COPPER-COATED MAGNESIUM WIRE AND METHOD FOR MANUFACTURING THE SAME

    公开(公告)号:US20190283097A1

    公开(公告)日:2019-09-19

    申请号:US16301486

    申请日:2017-03-22

    IPC分类号: B21C1/02 B21C1/00

    摘要: To provide a copper-coated magnesium wire which meets the demand for a lightweight coil wire material, and a method for manufacturing the same. The above-described problem is solved by a copper-coated magnesium wire (10) comprising a core material (1) made of magnesium, and a copper coating layer (2) made of copper or a copper alloy provided on a surface of the core material (1). In the copper-coated magnesium wire (10), a wire drawing mark is present on a surface of the copper coating layer (2), and the diameter is preferably within a range of 0.03 to 0.08 mm, inclusive. Further, a thickness of the copper coating layer (2) is preferably within a range of 5 to 30%, inclusive, as a ratio of the overall cross-sectional area. An insulating coating layer (3) may be provided on an outer circumferential side of the copper coating layer (2).

    Copper alloy tube with excellent high-temperature brazeability and manufacturing method therefor

    公开(公告)号:US10357813B2

    公开(公告)日:2019-07-23

    申请号:US15571436

    申请日:2017-05-08

    摘要: Provided is a copper alloy tube that is a drawn tube made from a CuCrZr alloy which suppresses the deterioration of mechanical strength and, in particular, the coarsening of crystal grains even in a temperature zone of a solutionizing treatment, and is thus excellent in high-temperature brazeability, as well as the manufacturing method therefor. The manufacturing method comprises a solutionizing step of heating and holding a tubular extrusion material at a solutionizing temperature of 900° C. or greater and then water-quenching the tubular extrusion material; a main process step comprising a set of steps including a drawing process step of drawing the tubular extrusion material, and an intermediate annealing step of heating at an annealing temperature and then water-quenching the drawn material; and an adjusting process step of further drawing the drawn material and setting average crystal grain sizes in a vertical cross section along an axis as well as a horizontal cross section orthogonal to the axis to 50 μm or less each. The average crystal grain sizes of the vertical cross section and the horizontal cross section are each set to 100 μm or greater and the annealing temperature is set to 900° C. or greater after the solutionizing step, thereby making it possible to make the average crystal grain sizes of the vertical cross section and the horizontal cross section 100 μm or less after the adjusting process step, even if heating is performed at at least 980° C. for 30 minutes followed by air-cooling.