公开(公告)号：US12000025B2

公开(公告)日：2024-06-04

申请号：US17050802

申请日：2019-04-25

申请人： Satyajeet Sharma

发明人： Satyajeet Sharma

IPC分类号： C22C19/05 ,  B22F1/00 ,  B22F10/00 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y80/00

CPC分类号： C22C19/056 ,  B22F1/00 ,  B22F10/00 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y80/00 ,  B22F2301/15

摘要： 738LC composition belongs to Ni-based super-alloy family. The alloy has been successfully used for hot section of turbine engine. Blades, Vanes and heat shields are made out of the alloy which can sustain a working temperature of 700 to 850 deg C. Additive manufacturing processes like Selective laser melting or PBF-L are not successful in using the alloy powder due to cracking issues. 738LC is also known to fall under the category of non-weldable alloys due to high content of gamma prime phase. The invention of the new composition is outside the standard 738LC with different concentration, morphology and size distribution of gamma prime phase. The invention has shown to eliminate the cracking issue in AM laser based process. The room temperature tensile properties observed are much better than cast 738LC properties.