Strong and ductile medium manganese steel and method of making
AssigneeThe University of Hong Kong
InventorsMingxin Huang, Chengpeng Huang
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Abstract
An ultra-strong, ductile and cheap medium manganese steel comprises in percentage by mass: 8-12 wt. % Mn, 0.2-0.4 wt. % C, 1-3 wt. % Al, 0.05-0.39 wt. % V, and the balance of Fe. The manufacturing method of the ultra-strong and ductile medium manganese steel includes the steps of: (a) hot rolling an ingot at 900-1200° C. into a steel sheet (or plate, or bar); (b) air cooling or water quenching the steel sheet to room temperature or warm rolling temperature, (c) warm rolling the steel sheet at 350-750° C. with 30-60% thickness reduction; (d) air cooling or water quenched the steel sheet to room temperature; (e) annealing the steel sheet at 600-650° C. for 0-300 minutes and (f) air cooling or water quenched the sheet to room temperature.
Claims9
A method for manufacturing warm roll (WR) medium manganese steel, comprising the steps of:
- (a) providing ingot comprised of 8-12 wt. % Mn, 0.2-0.4 wt. % C, 1-3 wt. % Al, 0.05-0.39 wt. % V, and the balance of Fe;
- (b) hot rolling the ingot at 900-1200° C. to a thick steel product;
- (c) air cooling the steel sheet or plate, or bar to room temperature or warm rolling temperature;
- (d) warm rolling the steel product at 350-750° C. with 30-60% thickness reduction;
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- (e) air cooling the steel product to room temperature.
Dependencies are inferred from the claim text.