EP 2090383 A1 20090819 - Methods of thermo-mechanically processing tool steel and tools made from thermo-mechanically processed tool steels
Title (en)
Methods of thermo-mechanically processing tool steel and tools made from thermo-mechanically processed tool steels
Title (de)
Verfahren zur thermomechanischen Verarbeitung von Werkzeugstahl und aus thermomechanischen Werkzeugstählen hergestellte Werkzeuge
Title (fr)
Procédés d'acier d'outil à traitement thermomécanique et outil fabriqué à partir d'aciers d'outils traités thermo-mécaniquement
Publication
Application
Priority
US 2923608 P 20080215
Abstract (en)
A method of thermo-mechanically processing a preform (64) composed of tool steel and a tool (18) to modify a workpiece (28). The preform (64) has a region containing austenite. The method comprises establishing the region at a process temperature between a martensitic start temperature and a stable austenitic temperature. While at the process temperature, the region is deformed to change an outer dimension and to modify the microstructure to a depth of 1 millimeter or more. The tool (18) comprises a member (20) composed of tool steel. The member (20) includes a first region (30) that extends from the outer surface (22) to a depth of greater than 1 millimeter and a second region (32). The first region (30) includes a plurality of grains having an average misorientation angle greater than about 34°, an average grain size that is at least 10% smaller than the second region (30), and has a different grain orientation than the second region (30).
IPC 8 full level
B21D 37/00 (2006.01); B21D 37/16 (2006.01); B21D 37/20 (2006.01); B22F 3/24 (2006.01); C21D 1/02 (2006.01); C21D 6/00 (2006.01); C21D 7/13 (2006.01); C21D 8/00 (2006.01); C21D 8/06 (2006.01); C21D 9/00 (2006.01); C21D 9/22 (2006.01)
CPC (source: EP)
C21D 1/02 (2013.01); C21D 7/13 (2013.01); C21D 8/005 (2013.01); C21D 9/22 (2013.01); C21D 2211/008 (2013.01); C21D 2221/00 (2013.01); C21D 2221/01 (2013.01); C21D 2221/02 (2013.01); C21D 2221/10 (2013.01)
Citation (applicant)
US 3903761 A 19750909 - RUNTON LESLIE A
Citation (search report)
- [XI] US 3903761 A 19750909 - RUNTON LESLIE A
- [XP] EP 1985390 A1 20081029 - DAYTON PROGRESS CORP [US]
- [A] EP 1657315 A1 20060517 - SANDVIK INTELLECTUAL PROPERTY [SE]
- [A] US 3413166 A 19681126 - ZACKAY VICTOR F, et al
- [A] JP 2005314756 A 20051110 - JFE STEEL KK
- [A] US 6355119 B1 20020312 - PETERS ANDREAS [DE], et al
- [A] US 4170497 A 19791009 - RAO BANGARU V N [US], et al
- [A] D.A.HUGHES ET AL: "Scaling of Misorientation Angle Distributions", PHYSICAL REVIEW LETTERS, vol. 81, no. 21, 23 November 1998 (1998-11-23), pages 4664 - 4667, XP002535458
- [A] J.A.WERT ET AL: "Revealing deformation microstructures", MATERIALSTODAY, vol. 10, no. 9, 1 September 2007 (2007-09-01), pages 24 - 32, XP002535459
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
EP 2090383 A1 20090819; EP 2090383 A8 20091014; EP 2090383 B1 20151104; CA 2654368 A1 20090815; CA 2654368 C 20171003; ES 2554608 T3 20151222; JP 2009191364 A 20090827; JP 2014210979 A 20141113; JP 6112752 B2 20170412; JP 6282545 B2 20180221; MX 2009001768 A 20090824; MX 368493 B 20191004; PT 2090383 E 20160126; TW 200944596 A 20091101; TW I479025 B 20150401; WO 2009102848 A1 20090820
DOCDB simple family (application)
EP 09002103 A 20090216; CA 2654368 A 20090217; ES 09002103 T 20090216; JP 2009031600 A 20090213; JP 2014142231 A 20140710; MX 2009001768 A 20090216; MX 2014001512 A 20090216; PT 09002103 T 20090216; TW 98104717 A 20090213; US 2009033887 W 20090212