Si(Ge)(-) Cu(-)V Universal alloy steel
AssigneeModern Alloy Co., LLC
InventorVladimir A. Fedchun
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Abstract
A composition and method for reducing cost and improving the mechanical properties of alloy steels. The invention resides in the ability of certain combinations of carbon-subgroup surfactants and d-transition metals to modify and control diffusion mechanisms of interstitial elements; to reduce or prevent the formation of non-equilibrium segregations of harmful admixtures and brittle phases on free metal surfaces and grain and phase boundaries; and to alter and control phase transformation kinetics in steel during heating and cooling.
Claims2
An alloy steel composition comprising by weight percent:
- 0.60-1.50% germanium;
- 0.40-0.80% copper;
- 0.10-0.35% vanadium;
- and the remainder, iron, manganese, silicon, chromium, carbon and incidental impurities.
(Reproduced anew as submitted in the Response (Paper No. 17) to the Final Office action) A general purpose construction carburizing or nitriding steel composition comprising by weight percent:
- 0.75-1.50% of silicon;
- 0.40-0.80% of copper;
- 0.10-0.35 of vanadium;
- 0.35-0.75% of manganese;
- 0.60-3.0% of chromium;
- 0.08 to less than 0.30% of carbon;
- iron and the remainder incidental impurities, whereby improved mechanical properties, reduced complexity, and reduced costs of steel compositions are attained.
Dependencies are inferred from the claim text.