Class of ductile iron, and process of forming same

Details Class of ductile iron, and process of forming same Class of ductile iron, and process of forming same

1994-09-30

1996-06-04

Yee, Deborah

Metal treatment

Stock

Ferrous

148633, 148615, 148545, 148548, C21D 500, C22C 3700

Patent

active

055229492

ABSTRACT:
A new class of ductile iron is formed by the hot isostatic pressing of a ductile iron casting, followed by austempering of the ductile iron casting. Hot isostatic pressing can be carried out at a pressure in the range of 10,000 to 17,000 psi at a temperature above 1600.degree. F., and usually in the range of 1850.degree. F. to 2050.degree. F. Austempering of the material is carried out by heating to the austenitizing temperature (about 1500.degree. F. to 1800.degree. F.), maintaining the austenitizing temperature for a suitable time period, and rapidly cooling to an austempering temperature (about 400.degree. F. to 750.degree. F.) to form ausferrite within the sample.

REFERENCES:
patent: 4596606 (1986-06-01), Kovacs et al.
patent: 4880477 (1989-11-01), Hayes et al.
patent: 5248354 (1993-09-01), Tada et al.
Kovacs, Modern Casting, Mar. 1990, pp. 38-41.
J. F. Wallace, Review of Problem Solving Research Projects on Gray and Ductile Irons, American Foundrymen's Society, Inc., 97th Casting and Congress and Castexpo '93 Apr. 24-27, 1993, Reprint No. 93-223.
K. L. Hayrynen, et al., More About the Tensile and Fatigue Properties of Relatively Pure ADA, American Foundrymen's Society, Inc., 97th Casting and Congress and Castexpo '93 Apr. 24-27, 1993, Reprint No. 93-127.

Affiliated with

Also associated with

Rating

Class of ductile iron, and process of forming same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Class of ductile iron, and process of forming same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Class of ductile iron, and process of forming same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-380750