TORSION BEAM MANUFACTURING METHOD USING HYBRID METHOD
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United States of America Patent
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Issued Date -
Feb 17, 2011
app pub date -
Aug 4, 2010
filing date -
Aug 11, 2009
priority date (Note) -
Abandoned
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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.
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