superfície protetora melhorada sobre aço inoxidável

• Main Authors: KUNIHIDE HASHIMOTO, BILLY SANTOS, KATHLEEN DONNELLY, LESLIE BENUM, HANY FARAG, NOBUYUKI SAKAMOTO, MICHAEL GYORFFY, VASILY SIMANZHENKOV
• Format: Patent
• Language: Portuguese
• Published: 06.10.2020
• Subjects: ALLOYS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; FERROUS OR NON-FERROUS ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TREATMENT OF ALLOYS OR NON-FERROUS METALS

a presente invenção refere-se a um substrato de aço compreendendo de 0,01 a 0,60 % em peso de la, de 0,0 a 0,65 % em peso de ce; de 0,06 a 1,8 % em peso de nb até 2,5% em peso de um ou mais elementos traço e carbono e silício podem ser tratados em uma atmosfera oxidante para produzir um revestimento de superfície resistente a coque de mncr2o4 tendo uma espessura de até 5 mícrons. A substrate steel of the comprising from 0.01 to 0.60 wt. % of La, from 0.0 to 0.65 wt. % of Ce; from 0.06 to 1.8 wt. % of Nb up to 2.5 wt. % of one or more trace elements and carbon and silicon may be treated in an oxidizing atmosphere to product a coke resistant surface coating of MnCr2O4 having a thickness up to 5 microns.