The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 05, 1999
Filed:
Apr. 29, 1997
Creusot Loire Industrie Societe Anonyme, Puteaux, FR;
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).