EP 3927474 A1 20211229 - REDUCTION AND REMOVAL OF PROCESS OXIDES ON STAINLESS STEEL
Title (en)
REDUCTION AND REMOVAL OF PROCESS OXIDES ON STAINLESS STEEL
Title (de)
REDUKTION UND ENTFERNUNG VON PROZESSOXIDEN AUF ROSTFREIEM STAHL
Title (fr)
RÉDUCTION ET ÉLIMINATION D'OXYDES DE TRAITEMENT SUR DE L'ACIER INOXYDABLE
Publication
Application
Priority
- US 201962808399 P 20190221
- US 2020019266 W 20200221
Abstract (en)
[origin: US2020270719A1] Oxides formed during annealing of stainless steel strip are removed with abrasive brushes, in lieu of acid or molten salt based pickling. In some embodiments, the stainless steel strip is treated with a rare earth element or a related transition metal before annealing, and then brushed after annealing to remove any oxides. The selection of brushes can impart a finished appearance to conventionally polished stainless steel.
IPC 8 full level
B08B 1/00 (2006.01); B08B 1/04 (2006.01); B21B 45/04 (2006.01); B24B 1/00 (2006.01); C23C 22/00 (2006.01); C23C 22/22 (2006.01); C23C 22/36 (2006.01)
CPC (source: EP KR US)
B08B 1/12 (2024.01 - KR); B21B 45/04 (2013.01 - KR); C21D 3/02 (2013.01 - US); C21D 6/002 (2013.01 - EP); C21D 6/004 (2013.01 - EP); C21D 8/0273 (2013.01 - KR); C21D 9/00 (2013.01 - EP); C21D 9/52 (2013.01 - EP US); C23C 18/08 (2013.01 - EP KR); C23C 18/1216 (2013.01 - EP KR); C23C 30/00 (2013.01 - US); B21B 3/02 (2013.01 - EP); B21B 45/04 (2013.01 - EP)
Citation (search report)
See references of WO 2020172554A1
Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
US 2020270719 A1 20200827; CA 3128089 A1 20200827; EP 3927474 A1 20211229; JP 2022521736 A 20220412; KR 20210130188 A 20211029; MX 2021010126 A 20210923; WO 2020172554 A1 20200827
DOCDB simple family (application)
US 202016797635 A 20200221; CA 3128089 A 20200221; EP 20716982 A 20200221; JP 2021548654 A 20200221; KR 20217030142 A 20200221; MX 2021010126 A 20200221; US 2020019266 W 20200221