Method of producing aluminum coated steel
AssigneeSumitomo Metal Industries, Ltd.
InventorsJiro Satake, Saburo Nagata, Katsuyasu Kawasaki
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Abstract
There is disclosed a method for producing aluminum coated steel comprising cleaning the surface of a steel substrate by grid- or shot-blasting or by pickling followed by rinsing with water and thermal spraying with aluminum thereon in a thickness ranging from 30 to 300 microns while heating said surface sufficiently to maintain it at a temperature ranging from about 100.degree. to 500.degree.C. The aluminum coated steel may be thereafter be treated by heating it at a temperature ranging from 150.degree. to 600.degree.C for 3 minutes to 24 hours after it has been cold-rolled to a reduction of area from 5 to 80% or after it has been hot-rolled at a temperature ranging from 150.degree. to 600.degree.C.
Claims8
A method for preparing aluminum coated steel comprising the steps of
- heating and thereafter maintaining a surface of a steel substrate to be coated with aluminum at at a temperature ranging from about 100.degree.C to about 500.degree.C,
- spraying the surface with aluminum in a thickness ranging from about 30 micrometers to about 300 micrometers,
- heating the aluminum spray coated steel to a temperature ranging from about 150.degree.C to a temperature at which alloy formation may be initiated, and
- hot-rolling the heated aluminum coated steel to a reduction in area ranging from about 5 percent to about 80 percent.
Dependencies are inferred from the claim text.