公开(公告)号：US20020074102A1

公开(公告)日：2002-06-20

申请号：US09735503

申请日：2000-12-14

发明人： John Zhiqiang Wang

IPC分类号： B22D027/04 ,  B22D007/10

CPC分类号： F01D5/16 ,  B22D27/045 ,  F01D5/26 ,  F05D2230/21 ,  F05D2300/607

摘要： Tuning of turbine bucket torsional and stripe mode natural frequencies can be effected without altering any turbine bucket physical features, such as weight and/or shape, and without affecting flexure frequencies. The tuning of certain turbine bucket natural frequencies serves to avoid detrimental blade resonance, thus improving the reliability of a gas turbine. The method includes investment casting the turbine bucket with a single crystal alloy, and tuning the natural frequency of the turbine bucket without modifying physical features of the turbine bucket by placing a crystal seed along a desired direction according to a relative orientation of an engine axial direction.

摘要翻译： 可以在不改变任何涡轮机桶物理特征（例如重量和/或形状）的情况下实现涡轮机桶扭转和条纹模式固有频率的调节，并且不影响挠曲频率。 某些涡轮机桶固有频率的调谐用于避免有害的叶片谐振，从而提高燃气轮机的可靠性。 该方法包括使用单晶合金投入铸造涡轮叶片，并根据发动机轴向方向的相对定向，沿着期望的方向放置晶种，调节涡轮机叶片的固有频率，而不改变涡轮机的物理特性 。

公开(公告)号：US20030188845A1

公开(公告)日：2003-10-09

申请号：US10355138

申请日：2003-01-31

申请人： Asea Brown Boveri AG

发明人： John Fernihough

IPC分类号： B22D007/10

CPC分类号： C30B11/00 ,  C30B29/52

摘要： Method of manufacturing a directionally solidified columnar grained article (3) with a reduced amount of secondary misorientation of the columnar grains with a casting assembly comprising a mold with a cavity, a selector section (1) at lower end of the mold, a heating chamber and a cooling chamber, wherein the mold is fed with a liquid metal and the mold is removed from the heating chamber to the cooling chamber and thereby the columnar grained article (3) is solidified, characterised in that the columnar grained article (3) is solidified with at least two dendrites (or grains) coming out of the selector section (1) and entering the main cavity of the shell mold in such a way that it is not possible for any dendrite or grain to grow from the bottom of the selector section (1) to the columnar grained article (3) defined by the shell mold cavity along a continuous path of purely vertical growth.

摘要翻译： 制造定向凝固的柱状颗粒物品（3）的方法，其中铸造组件包括具有空腔的模具，在模具的下端的选择器部分（1），加热室 和冷却室，其中模具被供给液态金属，并且将模具从加热室移除到冷却室，从而使柱状颗粒物品（3）固化，其特征在于，柱状颗粒物品（3）是 由至少两个从选择器部分（1）出来的树枝状晶粒（或晶粒）凝固并进入壳模的主腔，使得任何枝晶或晶粒不可能从选择器的底部生长 （1）到沿着纯垂直生长的连续路径由壳模腔定义的柱状颗粒物品（3）。

公开(公告)号：US20020014574A1

公开(公告)日：2002-02-07

申请号：US09935549

申请日：2001-08-24

申请人： Mitsubishi Materials Corporation

发明人： Saburo Wakita ,  Akira Mitsuhashi ,  Jun-ichi Sasaki

IPC分类号： C09D001/02 ,  B28B007/28 ,  B28B007/34 ,  C04B028/26 ,  C04B035/66 ,  B22D019/00 ,  B22D007/06 ,  B22D007/10 ,  B22D041/14 ,  B22D041/16 ,  B22D041/22 ,  B22D041/44

CPC分类号： C30B11/002

摘要： A mold for producing a silicon ingot having a layered structure comprising an inner silica layer containing at least one layer in which a fused silica powder with a particle size of 100 nullm or less and a fine fused silica sand with a particle size of 100-300 nullm is bonded with a silica binder, and an outer silica layer containing at least one layer in which a fused silica powder with a particle size of 100 nullm or less and a coarse fused silica sand with a particle size of 500-1500 nullm is bonded with a silica binder.