TORSION BEAM MANUFACTURING METHOD USING HYBRID METHOD
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United States of America Patent
Stats
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N/A
Issued Date -
Feb 17, 2011
app pub date -
Aug 4, 2010
filing date -
Aug 11, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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US Family Size
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Abstract
In a torsion beam manufacturing method using a hybrid method according to an exemplary embodiment of the present invention, dimensional accuracy is increased by high-temperature molding of performing molding by heating an internal structure up to A3 transformation point (950° C.) temperature at which the internal structure is austenited and tempering treatment is optionally performed only when the tempering treatment increases toughness because a ferrite structure is formed at a structural ratio of approximately 5% or less together with a martensite structure and a bainite structure by preventing quick cooling performed in a quenching treatment by lowering temperature through an indirect cooling method during the high-temperature molding process.
First Claim
Other Claims data not available
Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| KR | B1 | KR101122957 | Aug 11, 2009 |
| US | B2 | US8404176 | Aug 04, 2010 |
International Classification(s)
- 2010 Application Filing Year
- C21D Class
- 224 Applications Filed
- 169 Patents Issued To-Date
- 75.45 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- C21D Class
- 15.04 % this patent is cited more than
- 14 Age