Investment shell mold, for use in casting of reacting and refrac

Details Investment shell mold, for use in casting of reacting and refrac Investment shell mold, for use in casting of reacting and refrac

1974-06-17

1976-11-30

Smith, Ronald H.

Metal founding

Means to shape metallic material

United particle type shaping surface

106 389, 106 3827, 427133, 427134, B22C 902

Patent

active

039943461

ABSTRACT:
An investment shell mold inhibited against reaction with molten titanium, zirconium and other reactive and refractory metals cast therein is made by investing a pattern with successive dip coats and stucco coats. The first dip coat includes a tungsten and/or molybdenum compound inhibitor-former which is reducible by hydrogen to metallic tungsten or molybdenum. After removal of the pattern, the green mold is dried and then pyrolyzed in an atmosphere of hydrogen under conditions predetermined to convert the inhibitor-former to metallic condition. This creates on the mold interface a coating of metallic molybdenum or tungsten which serves as a physical barrier, inhibiting reaction of a molten reactive or refractory metal subsequently cast in the mold, with the mold material and binder particles of the latter.

REFERENCES:
patent: 1981403 (1934-11-01), Weitzenkorn
patent: 2618032 (1952-11-01), Traenkner
patent: 3125787 (1964-03-01), Lirones et al.
patent: 3422880 (1969-01-01), Brown et al.

Affiliated with

Also associated with

Rating

Investment shell mold, for use in casting of reacting and refrac does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Investment shell mold, for use in casting of reacting and refrac, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Investment shell mold, for use in casting of reacting and refrac will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1049127