Chromium containing alloy for fabricating pressing tools, pressi

Details Chromium containing alloy for fabricating pressing tools, pressi Chromium containing alloy for fabricating pressing tools, pressi

1984-06-08

1986-01-14

O'Keefe, Veronica

Stock material or miscellaneous articles

All metal or with adjacent metals

Surface feature

428685, 204 321, 2041291, C22C 3900, C03B 900

Patent

active

045645663

ABSTRACT:
The pressure plate of a pressing tool is made of a chromium containing alloy essentially consisting of, each in percent by weight, carbon up to 0.3, silicon up to 1.0, manganese up to 1.5, chromium in the range of 11 to 17.2, molybdenum up to 1.5, nickel up to 6.0, copper up to 4.5, columbium up to 0.45, and nitrogen up to 0.10, the remainder being iron and impurities resulting from the melting conditions, wherein a chromium equivalent defined as the sum of % chromium+% molybdenum+1.5.times.% silicon.times.0.5.times.% columbium has a value smaller than or equal to 17.2, a nickel equivalent defined as the sum of % nickel+0.5.times.% manganese+30.times.% carbon+20.times.% nitrogen has a value greater than or equal to 4.65 the chromium equivalent to nickel equivalent ratio has a value smaller than or equal to 3.0 and the ferrite content is smaller or equal to 5%. The pressure plate is provided with a uniformly structured working surface by chemical or electrochemical etching.

REFERENCES:
Metals Handbook, 8th Ed., vol. 2, Heat Treating, Cleaning & Finishing, Am. Soc. Metals, Metals Park, Ohio, 1964, pp. 471 and 606.

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