公开(公告)号：US20130276939A1

公开(公告)日：2013-10-24

申请号：US13923021

申请日：2013-06-20

申请人： EBIS CORPORATION

发明人： Yoshio EBISU

IPC分类号： C22F3/02

CPC分类号： C22F3/02 ,  B22D11/11 ,  B22D11/115 ,  C22B9/003 ,  C22B9/18 ,  C22B9/20 ,  C30B28/06 ,  C30B29/52 ,  Y02P10/253

摘要： This invention is concerned with the productions of unidirectionally solidified castings and remelting processed ingots such as ESR or VAR, which has paid special attention to the liquid flow phenomena within solid-liquid coexisting phase (mushy phase) during solidification, and made it clear for the first time that by applying high static magnetic field onto the whole mushy phase, the extremely slow interdendritic liquid flow responsible for the formation of macrosegregation can be suppressed, and thereby that the macrosegregation such as freckles can completely be eliminated. Thus, this invention provides with a novel casting technology for producing high quality castings and ingots without macrosegregation.

摘要翻译： 本发明涉及单向凝固铸件和ESR或VAR等重熔处理锭的生产，特别注意固化液固相（糊状相）期间的液体流动现象，并为 首先通过在整个糊状相上施加高静态磁场，可以抑制负责形成宏观偏析的极慢的枝晶间液体流动，从而可以完全消除诸如雀斑的宏观偏析。 因此，本发明提供了一种用于生产高质量铸件和锭的新型铸造技术，而没有宏观偏析。

公开(公告)号：US20240051018A1

公开(公告)日：2024-02-15

申请号：US18277800

申请日：2022-02-03

申请人： EBIS CORPORATION

发明人： Yoshio EBISU

IPC分类号： B22D27/04 ,  B22D27/02 ,  B22D27/00

CPC分类号： B22D27/045 ,  B22D27/02 ,  B22D27/003

摘要： This invention is concerned with the production of directionally solidified castings or ingots to eliminate casting defects such as macrosegregation and misoriented grain defects that occur in the blades for jet engines and industrial gas turbines. The mechanism of the occurrence of the above casting defects was clarified by the computer simulation system developed by this inventor, and it was found that, by strongly cooling the solid phase region and applying an axial static magnetic field, the heat pulses at the solidification interface due to convection of the liquid phase can be suppressed, and harmful lateral liquid flow in the solid-liquid coexisting phase can be suppressed by the synergistic effect of these two measures. This eliminates casting defects such as macrosegregation and misoriented grain defects, also refines the microstructure to produce high-quality products with excellent mechanical properties (creep strength). Regarding the strength of the static magnetic field, it was found that there is a range where the macrosegregation becomes minimum in a relatively low magnetic field range. This makes it possible to keep the required magnetic strength low, which significantly reduces the price of expensive superconducting coils. In addition, productivity can be improved by increasing the withdrawal speed.