一种定向及单晶高温合金的热处理方法

    公开(公告)号:CN109097527A

    公开(公告)日:2018-12-28

    申请号:CN201811294941.5

    申请日:2018-11-01

    Applicant: 上海大学

    CPC classification number: C21D1/04 C21D1/74 C21D9/00 C21D2201/04 C21D2211/001

    Abstract: 本发明提供了一种定向及单晶高温合金的热处理方法,属于材料加工技术领域。在交变磁场和惰性气体下,将定向及单晶高温合金依次进行均匀化热处理、固溶处理、高温时效处理和低温时效处理。本发明在均匀化热处理、固溶处理和时效处理时加入交变磁场,能够促进金属元素的扩散,降低元素偏析,促使合金组织更加均匀,从而影响合金γ′相体积分数,提高定向及单晶高温合金力学性能。从实施例可以看出:经交变磁场热处理的定向及单晶高温合金组织分布均匀,γ′相呈立方体;显微硬度值为399.8~417.2HV,在950℃时抗拉强度为675.3~696.2MPa,延伸率为16.21~21.73%,断面收缩率为29.56~34.06%。

    METHOD FOR PRODUCING MONOCRYSTALLINE METALLIC WIRE
    8.
    发明申请
    METHOD FOR PRODUCING MONOCRYSTALLINE METALLIC WIRE 审中-公开
    生产单晶金属线的方法

    公开(公告)号:WO03035915A8

    公开(公告)日:2003-08-21

    申请号:PCT/RU0200461

    申请日:2002-10-22

    Abstract: The invention relates to metallic articles for industrial use, more specifically to a method for producing a thin metallic monocrystalline wire having a diameter ranging from 0.01 to 5.0 mkm. The inventive method consists in carrying out the plastic deformation of a wire having a deformation rate of higher than 98 % by twisting two wires in spiral through time at a pitch angle ranging from 20 to 58° with respect to the longitudinal axis thereof and at a predetermined twisting speed through time during the thermal processing and the cleaning of the thus produced wire from polycrystalline metal residuals. Said method is also characterised in that the shear plastic deformation of the wire at a deformation rate of higher than 98 % is carried out by twisting one wire about the longitudinal axis thereof when the metal is in a yielded state in such a way that filamentary monocrystals are formed. In individual cases, the deformation of metallic wire is carried out at a temperature ranging from (-200°C) to 400 °C. All processing parameters are experimentally defined. The monocrystallinity of the wire is confirmed by X-ray analysis. In cases when the monocrystalline wire with polycrystalline residuals can not be used, the cleaning of a monocrystalline filament is carried out with the aid of a chemical method.

    Abstract translation: 本发明涉及用于工业用途的金属制品,更具体地涉及一种直径范围为0.01至5.0m范围的薄金属单晶线材的制造方法。 本发明的方法包括通过以相对于其纵轴为20至58°的间距角以螺旋形式扭转两根线,并以一 在热处理期间的预定扭转速度和由此产生的线从多晶金属残留物的清洁。 所述方法的特征还在于,当金属处于屈服状态时,以高于98%的变形率的线材的剪切塑性变形是通过围绕其纵向轴线扭绞一条线来进行的,使得丝状单晶 形成。 在个别情况下,金属线的变形在(-200℃)〜400℃的温度范围内进行。 所有处理参数都是实验定义的。 线的单晶由X射线分析证实。 在不能使用具有多晶残渣的单晶线的情况下,借助于化学方法进行单晶丝的清洗。

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