High-pressure fuel injection pipe
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United States of America Patent
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Jul 19, 2005
Grant Date -
Jan 13, 2005
app pub date -
Jul 10, 2003
filing date -
Jul 10, 2003
priority date (Note) -
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Abstract
In a high pressure fuel injection pipe, pipe extension and heat treatment are repeated by using a header manufactured by transformation induced plastic type strength steel. A process for depositing residual austenite is then performed, after which a final pipe extension process is performed, and the joint portion is molded and bending processing is performed without performing perfect annealing at the size of a product.
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