AboutAlexandre Guimarães Botelho Expertise General questions about metallurgy. Metals, fabrication processes, physical metallurgy, chemical composition and physical properties.
As my area of expertise is corrosion, fracture and extractive metallurgy, I may not respond quickly to more in-depth questions outside those fields.
Experience Up to the moment (2008) I have five years of experience in maintenance and inspection of industrial equipment, integrity assessment, reliability and failure analysis. I also have previous experience in iron mine processing unit and pelletizing process units.
Organizations PETROBRAS-Brazilian energy enterprise
Publications 9th COTEQ - Conferência sobre tecnologia de Equipamentos, 6 SIC - Simpósio Internacional de Confiabilidade, 2nd CIM - Seminário de Confiabilidade, Inspeção e Manutenção da PETROBRAS.
Education/Credentials I have technical degree in mechanics and graduation as a Metallurgical Engineer. I am also specialized in industrial equipment, maintenance and inspection, and currently specializing in Quality Engineering and Reliability Engineering.
I did not find anything about carbida, except for the information below.
Silicon carbida£º The product is a by-product of silicon iron production process£¬which are mainly used in pig iron for steel slag back£¬increase furnace temperature and promote residues-emitting for increasing numbers£¬but also in small casting furnace£¬replace silicon iron£¬and enhance the flow of molten iron£¬enhancing the resilience and cutting capacity.
Probably, it is a mispelling of carbide, which is a compound between carbon and a metallic element, such as titaniun carbide, used in high resistance fibers for composites.
Anything I can be of further help, please contact.
Best regards,
Alexandre Botelho
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QUESTION: you were right I misplelled it. what is epsilon carbide? how it influence tensile strength in ferritic steel material?
Answer Hello ,
The epsilon carbide is a transition carbide of between Fe2C and Fe3C composition, with hexagonal close packing microstructure which forms over a range of 250-400 ºC temperature during lower-bainite transformation. This transformation happens during tempering heat treatment of quenched steels, or during slow cooling in that temperature range.
It is a fine dispersed carbide in a ferrite needle-like matrix.
Lower bainite has lower tensile strenght (about 5-10%), but usually same hardness as martensite structures, but with a higher toughness.
