Fe-Mn group vibration damping alloy manufacturing method thereof
AssigneeWoojin Osk Corporation
InventorsJong-Sul Choi, Seung-Han Baek, Jun-Dong Kim
Life of this patent
Estimating the term…
Abstract
A vibration damping alloy has a mixed structure of martensite and austenite. The alloy steel is iron-based to which 14-22% by weight of manganese is added. The vibration damping alloy is manufactured by mixing electrolytic iron and manganese in a molten state. The molten mixture, containing 14-22% of manganese with the remainder of iron, is cast as an ingot. The ingot is homogenized at 1000.degree.-1300.degree. C. for 20-40 hours and then hot rolled at 900.degree.-1100.degree. C. for 20 minutes to 90 minutes. The ingot is cooled with air or water.
Claims3
An Fe-Mn vibration damping alloy having a mixed structure of martensite and austenite, said alloy consisting essentially of Fe and Mn, wherein said alloy is iron-based, is 14-22% by weight manganese, and is produced by:
- a. melting and mixing electrolytic iron and electrolytic manganese so that the resulting mixture contains 14-22% manganese by weight;
- b. subsequently casting the mixture into a mold to produce a molten metal ingot;
- c. subsequently heating the molten metal ingot at a temperature from about 1000.degree. C. to about 1300.degree. C. for 20-40 hours to produce a homogenized metal ingot;
- d. subsequently hot-rolling the homogenized metal ingot at a temperature from about 900.degree. C. to about 1100.degree. C. for a total of 20-90 minutes to produce a rolled metal;
- and
- e. subsequently cooling the rolled metal by air or water cooling at room temperature.
A method for manufacturing Fe-Mn vibration damping alloy comprising:
- a. melting and mixing electrolytic iron and electrolytic manganese so that the resulting mixture contains 14-22% manganese by weight;
- b. subsequently casting the mixture into a mold to produce a molten metal ingot;
- c. subsequently heating the molten metal ingot at a temperature from about 1000.degree. C. to about 1300.degree. C. for 20-40 hours to produce a homogenized metal ingot;
- d. subsequently hot-rolling the homogenized metal ingot at a temperature from about 900.degree. C. to about 1100.degree. C. for 20-90 minutes to produce a rolled metal;
- and
- e. subsequently cooling the rolled metal by air or water cooling at room temperature.
Dependencies are inferred from the claim text.