Investment casting with improved as-cast surface finish

Details Investment casting with improved as-cast surface finish Investment casting with improved as-cast surface finish

1996-10-24

1999-11-16

Batten, Jr., J. Reed

Metal founding

Process

Shaping a forming surface

106 388, 164 34, 164 35, 164 45, 164235, B22C 702, B22C 904

Patent

active

059839821

ABSTRACT:
The pattern material with substantially spherical filler particulates is used to produce investment cast components with improved surface quality, reduced finishing costs, and reduced core breakage. The pattern material comprises substantially spherical particles within the particle size range of about 10 microns to about 70 microns particle diameter, the use of which reduces the number of random, localized surface depressions and pits to improve pattern surface texture and uniformity. Patterns so formed inpart the same improvements to the surface of subsequent investment cast components. The resulting castings exhibit improved as-cast surface finish and reduced random, localized surface pitting, thereby reducing or eliminating expensive post casting surface finishing operations. Moreover, the spherical morphology of the filler particulates reduces injection pressures to fill a pattern die cavity as compared to non-spherical filler particulates. The lower injection pressures eliminate or reduce breakage of ceramic cores positioned in the die cavity for manufacture of hollow cast components, such as internally cooled turbine blades and vanes.

REFERENCES:
patent: 3316105 (1967-04-01), Feagin et al.
patent: 3655414 (1972-04-01), Hoffman et al.
patent: 3667979 (1972-06-01), Merges et al.
patent: 3704145 (1972-11-01), Ware et al.
patent: 3717485 (1973-02-01), Larson
patent: 3754943 (1973-08-01), Solomon
patent: 3801335 (1974-04-01), Larson
patent: 3822138 (1974-07-01), Noguchi et al.
patent: 3854962 (1974-12-01), Speyer
patent: 3880790 (1975-04-01), McLaren et al.
patent: 3884708 (1975-05-01), Burkert
patent: 3887382 (1975-06-01), Solomon
patent: 4919193 (1990-04-01), Sasaki
patent: 5006583 (1991-04-01), Argueso
patent: 5176188 (1993-01-01), Quinn et al.
patent: 5185108 (1993-02-01), Shimandle
patent: 5270360 (1993-12-01), Solomon
Metals Handbook, 9th Edition, vol. 7, pp. 25-29.
Abstract of Japanese Patent Publication 57-187207 Published Nov. 17, 1982.

Affiliated with

Also associated with

Rating

Investment casting with improved as-cast surface finish 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 casting with improved as-cast surface finish, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Investment casting with improved as-cast surface finish will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1311807