Systems for crystal growth utilizing furnaces, ampoules, and crucibles

    公开(公告)号:US09797061B2

    公开(公告)日:2017-10-24

    申请号:US14928740

    申请日:2015-10-30

    IPC分类号: C30B11/00 C30B29/48

    摘要: A system for growing a crystal is provided that includes a crucible, a furnace, and a heat transfer device. The crucible has a first volume to receive therein a material for growing a crystal. The furnace has an ampoule configured to receive the crucible within the ampoule. The furnace is configured to produce a lateral thermal profile combined with a vertical thermal gradient. The heat transfer device is disposed under the crucible and configured to produce a leading edge of growth of the crystal at a bottom of the crucible. The heat transfer device includes at least one elongate member disposed beneath the crucible and extending along a length of the crucible.

    Casting pattern
    55.
    发明授权

    公开(公告)号:US09616489B2

    公开(公告)日:2017-04-11

    申请号:US14427485

    申请日:2013-09-06

    申请人: SNECMA

    摘要: A casting pattern for a lost-pattern casting, the pattern being in a shape of a turbine engine blade with a root and a body on either side of a platform that is substantially perpendicular to a main axis of the blade, and a method of producing a shell mold from the pattern, and a casting method using the shell mold. The blade body presents a pressure side, a suction side, a leading edge, and a trailing edge. The pattern also includes an expansion strip adjacent to the trailing edge, and a refractory core embedded in the pattern but presenting, both on the pressure side and on the suction side, a respective flush varnished surface between the trailing edge and the expansion strip. A web extends between the platform and the expansion strip and presents a free edge between them.

    Casting method and cast article
    59.
    发明授权
    Casting method and cast article 有权
    铸造方法和铸造物品

    公开(公告)号:US09555471B2

    公开(公告)日:2017-01-31

    申请号:US14165719

    申请日:2014-01-28

    摘要: A casting method and cast article are provided. The casting method includes providing a casting furnace, the casting furnace including a withdrawal region in a lower end, positioning a mold within the casting furnace, positioning a molten material in the mold, partially withdrawing the mold a withdrawal distance through the withdrawal region in the casting furnace, the withdrawal distance providing a partially withdrawn portion, then reinserting at least a portion of the partially withdrawn portion into the casting furnace through the withdrawal region, and then completely withdrawing the mold from the casting furnace. The reinserting partially re-melts a solidified portion within the partially withdrawn portion to fill pores formed therein with the molten material. The cast article includes a microstructure and a porosity corresponding to being formed by a process comprising partially withdrawing, reinserting, and completely withdrawing of a mold from a casting furnace to form the cast article.

    摘要翻译: 提供铸造方法和铸造制品。 铸造方法包括提供铸造炉,铸造炉包括下端的取出区域,将模具定位在铸造炉内,将熔融材料定位在模具中,通过在模具中的退出区域部分地抽出模具的取出距离 退出距离提供部分撤回部分,然后通过退出区域将至少部分撤回部分重新插入铸造炉中,然后从铸造炉中完全取出模具。 重新插入部分地再次熔化部分抽出部分内的凝固部分,以填充其中形成的熔融材料的孔。 铸造制品包括微观结构和孔隙度,其对应于通过包括从铸造炉部分地取出,重新插入和完全取出模具的方法形成,以形成铸造制品。