Method of making carbide-coated graphite dies and coated article

• US 3,177,084 A
• Filed: 04/20/1961
• Issued: 04/06/1965
• Est. Priority Date: 08/23/1956
• Status: Expired due to Term

• Current Assignee: Hollis Amstein Edmund
• Original Assignee: Hollis Amstein Edmund
• Inventors: HOLLIS AMSTEIN EDMUND
• Application Number:
  US04/104,466
• Time in Patent Office: 1,447 Days
• US Class Current: 428/408
• CPC Class Codes: B21J 13/02 Dies or mountings therefor
• CPC Class Codes: B22C 3/00 Selection of compositions for coating the surfaces of moulds, cores, or patterns
• CPC Class Codes: C04B 35/522 Graphite C04B35/536 takes precedence
• CPC Class Codes: C04B 35/58071 based on titanium borides
• CPC Class Codes: C04B 35/645 Pressure sintering
• CPC Class Codes: C04B 41/5057 Carbides
• CPC Class Codes: Y10T 428/30 Self-sustaining carbon mass or layer with impregnant or other layer

Claims

1. A GRAPHITE DIE FOR USE IN A HIGH TEMPERATURE HOT PRESSING PROCESS HAVING DISPOSED ON THE SURFACES DEFINING A DIE CAVITY A FIRED COATING COMPRISING A FILM OF A CARBIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM, HAFNIUM, VANADIUM, NIOBIUM, TANTALUM, CHRO-