Si(Ge)-Cu-V steel alloy
First Claim
1. A corrosion resistant alloy steel composition suitable for manufacture of tools and dies, produced by conventional means, characterized by a combination of high strength, ductility and toughness, the composition consisting by weight percent essentially of:
- about 0.56-0.65 of carbon, about 0.17-0.75 of manganese, about 0.75-1.50 of silicon;
from more than 0.40 to less than 0.80 of copper;
about 0.10-0.35 of vanadium; and
about 12.5-18.00 of chromium, the remainder being iron and incidental impurities.
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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.
9 Citations
6 Claims
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1. A corrosion resistant alloy steel composition suitable for manufacture of tools and dies, produced by conventional means, characterized by a combination of high strength, ductility and toughness, the composition consisting by weight percent essentially of:
- about 0.56-0.65 of carbon, about 0.17-0.75 of manganese, about 0.75-1.50 of silicon;
from more than 0.40 to less than 0.80 of copper;
about 0.10-0.35 of vanadium; and
about 12.5-18.00 of chromium, the remainder being iron and incidental impurities. - View Dependent Claims (2)
- about 0.56-0.65 of carbon, about 0.17-0.75 of manganese, about 0.75-1.50 of silicon;
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3. A corrosion resistant alloy steel composition produced by conventional means, characterized by a combination of relatively high strength, ductility and toughness, the composition consisting by weight percent essentially of:
- about 0.08-0.56 of carbon, about 0.17-075 of manganese, about 0.75-1.50 of silicon;
from more than 0.40 to less than 0.80 of copper;
about 0.10-0.35 of vanadium; and
about 12.5-18.00 of chromium, the remainder being iron and incidental impurities. - View Dependent Claims (4)
- about 0.08-0.56 of carbon, about 0.17-075 of manganese, about 0.75-1.50 of silicon;
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5. A martensite aging alloy steel composition produced by conventional means, characterized by a combination of high strength, ductility and toughness, said composition comprising by weight percent of:
- about 0.08-0.22 of carbon;
about 0.75-1.50 of silicon;
from more than 0.50 to about 0.80 of copper;
about 3.5-8.50 of nickel;
about 0.10-1.00 of vanadium;
about 9.5-12.5 of chromium;
the remainder being iron and incidental impurities.
- about 0.08-0.22 of carbon;
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6. A method of producing steel alloys having improved ductility and toughness, said method comprising the step of adding into a conventional heat of steel containing iron and other incidental impurities found in steel scrap, about 0.17-0.75 wt. % of manganese and about 0.60-18.00 wt. % of chromium, a combination of carbon-subgroup surfactants—
- silicon (Si) or germanium (Ge), and d-transition metals—
copper (Cu) and vanadium (V), up to the following concentrations and the final ratio in the heat provided by the formula;
- silicon (Si) or germanium (Ge), and d-transition metals—
Specification
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- Resources
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Current AssigneeModern Alloy Company LLC
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Original AssigneeModern Alloy Company LLC
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InventorsFedchun, Vladimir A.
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Primary Examiner(s)Yee, Deborah
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Application NumberUS09/724,328Time in Patent Office609 DaysField of Search420/49, 420/71, 420/55, 420/58, 420/60, 420/104, 420/91, 420/115, 420/83, 420/112, 420/129, 148/325, 148/327, 148/331, 148/332, 148/333US Class Current420/60CPC Class CodesC22C 38/002 containing In, Mg, or other...C22C 38/20 with copperC22C 38/24 with vanadiumC22C 38/42 with copperC22C 38/46 with vanadium
