Metal treatment – Stock – Ferrous
Patent
1991-07-12
1992-12-08
Yee, Deborah
Metal treatment
Stock
Ferrous
148333, C22C 3822, C22C 3824
Patent
active
051694590
ABSTRACT:
The present invention provides a material which is superior in all of peel resistance, corrosion resistance and abrasion resistance against alcoholic fuels.
The material comprises an Fe-Cr-C based steel or Fe-Cr-C-Cu based steel. For applications wherein members formed from the material are subjected to impacts, the Cr content is within the range of at least 8.0% and less than 16.0%, the relation between the C content and the Cr content satisfies % Cr+25.times.% C.ltoreq.32 based on weight, and the ratio of the area of a primary carbide to the total sectional area of the material is 1.5% or less. For non-impact applications Cr content is more than 12.0% and less than 16.0%, % C and % Cr satisfy % Cr+25.times.% C>32, and the ratio of the area of a primary carbide to the total sectional area of the material is 8.0% or less. This material is especially superior in peel resistance against alcoholic fuels. The Fe-Cr-C based steel may optionally contain Cu, Si, Mn, W, Mo, V, Co, and Ni.
REFERENCES:
patent: 2478723 (1949-08-01), Trantin, Jr.
Design Engineering, "Soft Magnetic Stainless Steel for Electric Fuel Injector", p. 16, London, May 1989.
Fukushima Katsuaki
Ito Masakazu
Okuno Toshio
Hitachi Metals Ltd.
Yee Deborah
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