Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Reexamination Certificate
2004-05-20
2010-06-01
King, Roy (Department: 1793)
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
Reexamination Certificate
active
07727343
ABSTRACT:
The invention presents a new warm control rolling method, in consideration of processing heat generation, as a method of stably manufacturing ultrafine crystal steel of 3 microns to 1 micron or less, without any limitation in pass interval or strain speed, being a rolling method of manufacturing steel mainly composed of fine ferrite particle texture with average ferrite grain size of 3 μm or less, in which, in the rolling process of one pass or more wherein the rolling temperature range is a temperature region of 350° C. to 800° C., the material temperature upon start of rolling of each rolling process does not exceed the maximum temperature of 800° C., and the material temperature during rolling and right after final rolling (within 1 second) is not lower than 350° C., temperature Tx-outright after rolling in each rolling process (within 1 second) is not higher than the temperature that is higher than rolling entry temperature Tx-inby 100° C. and the material temperature right after rolling (within 1 second) is not lower than the temperature that is lower than the temperature right before rolling by 100° C.
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Saito, JP 60-200915 English Abstract, Steel strip rolling and cooling by controlling on basis of ferrite structure strains and austenite grain size, Oct. 11, 1985.
Nagai Kotobu
Torizuka Shiro
King Roy
National Institute for Materials Science
Wenderoth , Lind & Ponack, L.L.P.
Yang Jie
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