EP 0272788 A1 19880629 - A method of making wear resistant gray cast iron.
Title (en)
A method of making wear resistant gray cast iron.
Title (de)
Verfahren zur Herstellung eines verschleissfesten Graugusseisens.
Title (fr)
Procédé de fabrication de fonte grise résistante à l'usure.
Publication
Application
Priority
US 94514586 A 19861222
Abstract (en)
A method is disclosed for making gray iron having both increased wear resistance and impact toughness, comprising: (a) solidifying a hypoeutectic gray iron melt (i) to which has been added a carbide forming agent in an amount of .3-.8% by weight, selected from the group consisting of Ti, V and Mo, and, advantageously, a high carbon austenite-ferrite forming agent in an amount of .5-3.0%, by weight, selected from the group consisting of nickel and copper, and at a solidification rate to form a matrix with a mixture of flake graphite and eutectic carbide suspended in the matrix; and (b) heat treating the solid by (i) heating to a temperature and for a period of time to fully austenitize the solid (ii) quenching the solid to a temperature level and for a period of time to decompose austenite to form and high carbon austenite and ferrite matrix and (iii) air cooling the solid to room temperature.
IPC 1-7
IPC 8 full level
B22D 27/20 (2006.01); C21D 1/19 (2006.01); C21D 5/00 (2006.01); C22C 33/08 (2006.01); C22C 37/00 (2006.01)
CPC (source: EP)
C21D 5/00 (2013.01); C22C 37/00 (2013.01)
Citation (search report)
- [Y] EP 0174087 A2 19860312 - FORD MOTOR CO [GB], et al
- [Y] FR 89010 E 19670719
- [A] GB 545102 A 19420511 - MOND NICKEL CO LTD
- [A] GB 840490 A 19600706 - GOETZEWERKE
- [AD] EP 0018703 A2 19801112 - TEXTRON INC [US]
- [AD] US 3384515 A 19680521 - ACKERMAN ALLEN D, et al
- [A] PATENT ABSTRACTS OF JAPAN, vol. 10, no. 71 (C-334)[2128], 20th March 1986; & JP-A-60 211 050 (TEIKOKU PISTON RING K.K.) 23-10-1985
- [A] METAL PROGRESS, vol. 128, no. 2, July 1985, pages 19-26, Metals Park, Ohio, US; R.B. GUNDLACH et al.: "Austempered ductile iron combines strength with toughness and ductility"
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0272788 A1 19880629; EP 0272788 B1 19920701; AU 601249 B2 19900906; AU 8287987 A 19880623; CA 1311993 C 19921229; DE 3780138 D1 19920806; DE 3780138 T2 19930211; JP S63166929 A 19880711
DOCDB simple family (application)
EP 87310035 A 19871113; AU 8287987 A 19871221; CA 553034 A 19871127; DE 3780138 T 19871113; JP 29593687 A 19871124