Patents Assigned to Creusot Loire Industrie (Societe Anonyme)
  • Low alloy steel for the manufacture of molds for plastics
    Patent number: 5855845
    Abstract: Steel for the manufacture of molds for injection molding of plastics, wherein its chemical composition contains, by weight: 0.35%.ltoreq.C.ltoreq.0.5%, 0%.ltoreq.Si.ltoreq.0.5%, 0.2%.ltoreq.Mn.ltoreq.2.5%, 0%.ltoreq.Ni.ltoreq.4%, 0%.ltoreq.Cr.ltoreq.4%, 0%.ltoreq.Mo+W/2.ltoreq.2%, 0%.ltoreq.Cu.ltoreq.1%, 0%.ltoreq.V+Nb/2+Ta/4.ltoreq.0.5%, 0.005%.ltoreq.Al.ltoreq.0.2%, 0%.ltoreq.B.ltoreq.0.015%, 0%.ltoreq.Ti+Zr/2.ltoreq.0.3%, 0%.ltoreq.S+Se+Te .ltoreq.0.2%, 0%.ltoreq.Pb+Bi.ltoreq.0.2%, 0%.ltoreq.Ca.ltoreq.0.1%, the remainder being iron and impurities resulting from the production, the analysis simultaneously satisfying the following relationships: Cr+3.times.(Mo+W/2)+10.times.(V+Nb/2+Ta/4).gtoreq.1, R=3.8.times.C+10.times.Si+3.3.times.Mn+2.4.times.Ni+1.4.times.(Cr+Mo+W/2). ltoreq.11, Qu=3.8.times.C+1.1.times.Mn+0.7.times.Ni+0.6.times.Cr+1.6.times.(Mo+W/2)+k B.gtoreq.3, with kB=0.5 if B.gtoreq.0.0005% and kB=0 if not, and: R.ltoreq.Max(2.33.times.Qu-1, 0.9.times.Qu+4).
    Type: Grant
    Filed: April 29, 1997
    Date of Patent: January 5, 1999
    Assignee: Creusot Loire Industrie Societe Anonyme
    Inventors: Jean Beguinot, Gilbert Primon, Frederic Chenou
  • Steel and process for the manufacture of components having high abrasion resistance
    Patent number: 5714116
    Abstract: A steel composition useful for the manufacture of articles and components having high abrasion resistance.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: February 3, 1998
    Assignee: Creusot Loire Industrie (Societe Anonyme)
    Inventors: Jean Beguinot, Jean-Georges Brisson