Method of producing Fe-Ni series alloys having improved effect for restraining streaks during etching
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United States of America Patent
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Mar 26, 1991
Grant Date -
N/A
app pub date -
Sep 29, 1989
filing date -
Oct 7, 1988
priority date (Note) -
Expired
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Abstract
An ingot of Fe-Ni series alloy comprising 30-80 wt % of NI or further 0.001-0.03 wt % and B and the balance of Fe is upset at a forging ratio of at least 1/1.2U, hot forged at a total sectional reduction ratio of at least 30% to form a slab, from which fine crystal grains are formed at final heat treating stage, whereby Fe-Ni series alloys for electronic and electromagnetic materials are economically produced without generating streaks at the etching.
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