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FORGED CRANKSHAFT AND METHOD FOR MANUFACTURING THE FORGED CRANKSHAFT

  • US 20150321245A1
  • Filed: 12/09/2013
  • Published: 11/12/2015
  • Est. Priority Date: 12/12/2012
  • Status: Active Grant
First Claim
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1. A forged crankshaft, comprising:

  • a carbon steel containing S,wherein in a portion corresponding to a machined outer circumferential surface of a shaft part, a ratio x/y of an area rate x of sulfide in a position corresponding to a parting surface of a die for finish forging to an area rate y of sulfide in a position corresponding to a bottom of a die impression of the die for finish forging is equal to or lower than 1.5.

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