Two-step brazing process for joining materials with different
coefficients of thermal expansion
    1.
    发明授权
    Two-step brazing process for joining materials with different coefficients of thermal expansion 失效
    用于连接具有不同热膨胀系数的材料的两步钎焊工艺

    公开(公告)号:US5855313A

    公开(公告)日:1999-01-05

    申请号:US835257

    申请日:1997-04-08

    CPC分类号: B23K1/0012 B23K1/19 F28F21/02

    摘要: A two-step process for joining a first part to a second part, the first part having a coefficient of thermal expansion lower than the coefficient of thermal expansion of the second part. An anchor layer is then brazed at a lower temperature to the first part having a high thermal expansion coefficient. The anchor layer has a thickness such that upon cooling it will yield to relieve stress build up resulting from the differing thermal expansion coefficients between it and the first part. The anchor layer is then brazed to the part having a high thermal expansion coefficient. The process is particularly useful for joining carbon-carbon composite parts to copper substrates for use in the manufacture of high temperature heat exchangers as used, for example, in nuclear fusion reactors.

    摘要翻译: 一种用于将第一部分接合到第二部分的两步法,第一部分的热膨胀系数低于第二部分的热膨胀系数。 然后将锚固层在较低温度下钎焊到具有高热膨胀系数的第一部分。 锚固层具有这样的厚度,使得在冷却时,它将屈服以减轻由于其与第一部分之间的不同热膨胀系数导致的应力积累。 然后将锚定层钎焊到具有高热膨胀系数的部分。 该方法特别适用于将碳 - 碳复合材料部件接合到例如在核聚变反应器中使用的用于制造高温热交换器的铜基板上。