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    • 3. 发明授权
    • Process of making surface alloyed parts
    • 制作表面合金零件的工艺
    • US4372995A
    • 1983-02-08
    • US271128
    • 1981-06-08
    • John J. RauschRay J. Van Thyne
    • John J. RauschRay J. Van Thyne
    • C23C2/10C23C10/22C23C12/02C23C1/08C23C1/10
    • C23C12/02C23C10/22C23C2/10
    • Predetermined diffusing elements such as chromium and/or aluminum are diffused into the surface of a ferrous-based part while preventing, or at least minimizing, bonding of portions of such part to each other or to a fixture with which the part is processed, by constructing the fixture of a barrier material or placing a barrier layer between the member and the part. The barrier has a composition to substantially preclude diffusion therein of the predetermined element and that is capable of withstanding a molten-lead alloy bath. Then the part is contacted by a molten alloy bath consisting essentially of lead and the diffusing elements. Thereafter, the part is separated from the member. The process finds particular use when the part is coiled sheet steel, in which case adjacent flights of coil are spaced by separator means which is made of a barrier material or carries a barrier layer.
    • 预定的扩散元素如铬和/或铝扩散到铁基部件的表面中,同时防止或至少最小化粘合这些部件的部分彼此或部件被加工的夹具,通过 构造阻挡材料的夹具或将阻挡层放置在构件和部件之间。 阻挡层具有基本上防止其中预定元件扩散并且能够耐受熔融铅合金浴的组成。 然后通过基本上由铅和扩散元件组成的熔融合金浴接触该部件。 此后,该部件与该部件分离。 当该部件是卷绕钢板时,该过程会发现特别的用途,在这种情况下,线圈的相邻翼片由隔离材料隔开或由阻挡材料制成或承载阻挡层隔开。