Carbon-doped alloy steel with super room-temperature ductility and its preparation process
AssigneeCity University of Hong Kong
InventorsTao Yang, Qian Li
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Abstract
The present invention relates to a carbon-doped alloy steel with super room-temperature ductility, the carbon-doped alloy steel includes a chemical composition including 10-30 wt. % of nickel (Ni), 0.01-5 wt. % of silicon (Si), 0.01-2 wt. % of carbon (C), and 60-90 wt. % of iron (Fe). Different from traditional super-plastic alloys that could only obtain superplasticity at high homologous temperatures, the present invention introduces a super-ductile steel that exhibits a giant uniform elongation of over 100% at room temperature. Meanwhile, different from deformation softening in super-plastic alloys, super-ductile steels show an exceptional work-hardening capability, enabling them to obtain enough strength for application.
Claims7
A carbon-doped alloy steel with super room-temperature ductility, wherein the carbon-doped alloy steel is a FeNiSiC alloy comprising a chemical composition of:
- 10-30 wt. % of nickel (Ni);
- 1-2.5 wt. % of silicon (Si);
- 0.01-2 wt. % of carbon (C);
- and
- 60-90 wt. % of iron (Fe);
- wherein the carbon-doped alloy steel exhibits a room-temperature uniform elongation of at least 100%;
- and
- wherein the room-temperature uniform elongation is capable of 174±4.1%.
Dependencies are inferred from the claim text.