Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Reexamination Certificate
2011-04-12
2011-04-12
Kastler, Scott (Department: 1733)
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
C148S605000
Reexamination Certificate
active
07922840
ABSTRACT:
A method for producing hot-rolled strip from austenitic stainless steels. In a first step, a cast product is subjected to a rolling operation in a rolling mill with a finishing train, and, in a second step, a heat treatment is carried out to prevent susceptibility to corrosion, especially intergranular corrosion due to chromium carbide precipitation. To establish the final rolling temperature (Twe), a run-in temperature (Tein) of the cast product into the finishing train of the rolling mill that is above 1,150° C., and preferably above 1,200° C., is established by a multistage heating process, especially a two-stage heating process, which comprises a preheating stage and an intensive heating stage, and the heat treatment is carried out by directly utilizing the rolling heat.
REFERENCES:
patent: 4360390 (1982-11-01), Tominaga et al.
Albedyhl Manfred
Schuster Ingo
Kastler Scott
Lucas & Mercanti LLP
SMS Siemag Aktiengesellschaft
Stoffel Klaus P.
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