Universal alloy steel
First Claim
1. An alloy steel composition produced by conventional means and characterized by a combination of high strength, ductility and toughness, the composition consisting by weight percent essentially of:
- from more than 0.45 to 0.65 of carbon;
about 0.75-1.50 of silicon;
from more than 0.40 to less than 0.65 of copper;
about 0.10-0.35 of vanadium; and
about 0.60-3.00 of chromium, the remainder being iron, manganese 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.
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Citations
3 Claims
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1. An alloy steel composition produced by conventional means and characterized by a combination of high strength, ductility and toughness, the composition consisting by weight percent essentially of:
- from more than 0.45 to 0.65 of carbon;
about 0.75-1.50 of silicon;
from more than 0.40 to less than 0.65 of copper;
about 0.10-0.35 of vanadium; and
about 0.60-3.00 of chromium, the remainder being iron, manganese and incidental impurities.
- from more than 0.45 to 0.65 of carbon;
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2. An alloy steel composition with superior impact strength, particularly at low temperatures, consisting by weight percent essentially of:
- from more than 0.45 to 0.55 of carbon;
about 0.75-1.5 of silicon;
about 0.35-0.75 of manganese;
about 0.40-0.80 of copper;
about 0.10-0.35 of vanadium;
about 0.6-1.6 of chromium, the remainder being iron and incidental impurities.
- from more than 0.45 to 0.55 of carbon;
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3. An alloy steel composition for manufacturing tools and dies with superior toughness and impact strength, particularly at low temperatures, consisting by weight percent essentially of:
- about 0.55-0.65 of carbon;
about 0.75-1.5 of silicon;
about 0.40-0.80 of copper;
about 0.10-0.35 of vanadium; and
about 0.60-3.0 of chromium;
the remainder being iron, manganese, and incidental impurities.
- about 0.55-0.65 of carbon;
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)MAI, NGOCLAN THI
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Application NumberUS09/534,117Time in Patent Office859 DaysField of Search420/8, 420/34, 420/60, 420/90, 420/104, 420/127US Class Current420/34CPC 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
