Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1992-02-13
1993-07-06
Dean, R.
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148410, C22F 110
Patent
active
052250091
ABSTRACT:
The object of the present invention is to provide a method for the manufacturing of a cutting material possessing excellent toughness and a high strength. The composition by weight of the Nickel alloy ingot, is chromium (Cr )14-23%, molybdenum (Mo) 14-20%, tungsten (W) 0.2-5%, iron (Fe) 0.2-7%, cobalt (Co) 0.2-2.5% with the remaining portion being made up of Ni and unavoidable impurities. After undergoing a solution heat treatment process, the Ni ingot undergoes plastic working, at a product ratio above 80%, followed by heating at a temperature of 500.degree.-600.degree. C. for longer than 30 minutes. Heating the alloy of the aforementioned composition at the above mentioned temperature promotes the precipitation of an intermetallic compound possessing a hardness greater than 57 on the HRC. The resulting superior cutting material is resistant to corrosion even when exposed to sea water. The cutting material obtained through the process of the present invention provides a high resistance to both rust and chipping in addition to a high abrasion resistance, all of which are advantages over the conventional stainless steel cutting material.
REFERENCES:
patent: 4245698 (1981-01-01), Berkowitz et al.
patent: 4279645 (1981-07-01), Brown
Metals handbook, 9 ed. American Society for Metals, vol. 3, Properties and Selection Stainless Steels, Tool Materials and Special Purpose Metals, 1983, pp. 154-155.
Kaneko Kenji
Kawaoka Yukio
Ohzeki Hiro
Orikasa Yousuke
Shimizu Sadao
Dean R.
Mitsubishi Materials Corporation
Phipps Margery S.
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