EP 0798395 B1 20000712 - Heat insulating alloy steel and die casting machine parts
Title (en)
Heat insulating alloy steel and die casting machine parts
Title (de)
Wärmeisolierender legierter Stahl und Teile für eine Druckgiessmaschine
Title (fr)
Acier allié et isolante thermique, et pièces pour un dispositif de couler sous pression
Publication
Application
Priority
- JP 7388396 A 19960328
- JP 7388496 A 19960328
Abstract (en)
[origin: EP0798395A2] A heat insulating alloy steel contains 0.1 to 5.0 wt.% of C, 3.0 to 7.0 wt.% of Si, 5.0 to 18 wt.% of Ni, 0.5 to 8.0 wt.% of Cr, optionally at least one of less than 2.0 wt.% or less of Mn, 2.0 wt.% or less of Al and 2.0 wt.% of Mo, and the balance essentially of Fe. This heat insulating steel has a matrix metal structure with 30 % or more area ratio of a martensite phase. Further, a die casting machine part such as an injection sleeve or a pouring port bushing, having a surface making contact with an Al based molten metal, is made of a Fe base alloy containing 0.1 to 1.5 wt.% of C, 5.0 to 40 wt.% of Ni and 0.5 to 10 wt.% of at least one carbide forming element from: Cr, Mo, W, V, Nb, Ta, Ti and Zr. Such machine part comprises a surface layer portion including the surface making contact with the Al basedmolten metal, formed therein with a high density carbide layer as a dissolution resistance barrier. <IMAGE>
IPC 1-7
IPC 8 full level
B22D 17/20 (2006.01); B22D 17/22 (2006.01); C22C 38/40 (2006.01)
CPC (source: EP)
B22D 17/2023 (2013.01); B22D 17/203 (2013.01); B22D 17/2209 (2013.01); C22C 38/40 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0798395 A2 19971001; EP 0798395 A3 19971203; EP 0798395 B1 20000712; DE 69702468 D1 20000817; DE 69702468 T2 20010308; KR 970065757 A 19971013
DOCDB simple family (application)
EP 97302103 A 19970326; DE 69702468 T 19970326; KR 19970010910 A 19970327