Title:
GRAPHITE COMPOSITE FREE CUTTING STEEL
Document Type and Number:
Japanese Patent JPH07150293
Kind Code:
A
Abstract:
PURPOSE: To produce a graphite free cutting steel free from the need of hardening as pretreatment and having extremely excellent machinability compared with that of the conventional free cutting element-added steel by the addition of a small eat. of free cutting elements.
CONSTITUTION: This steel has a compsn. contg., by weight, 0.1 to 1.5°C, 0.5 to 2.0% Si, 0.1 to 2.0% Mn, 0.01 to 0.5% Al, 0.0003 to 0.0150% B, 0.0015 to 0.0150$ N and ≤0.0030% O and furthermore contg. one or more kinds selected from among 0.03 to O.25% S, 0.03 to 0.3% Pb, 0.01 to 0.3% Bi, 0.002 to 0.5% Te, 0.003 to 0.10% Se, >0.03 to 0.15% P and 0.0002 to 0.30% Ca, and the balance Fe with inevitable impurities and has a metallic structure mainly of ferrite and graphite.
Inventors:
HOSHINO TOSHIYUKI
MATSUZAKI AKIHIRO
AMANO KENICHI
MATSUZAKI AKIHIRO
AMANO KENICHI
Application Number:
JP29666793A
Publication Date:
June 13, 1995
Filing Date:
November 26, 1993
Export Citation:
Assignee:
KAWASAKI STEEL CO
International Classes:
C22C38/00; C22C38/06; C22C38/60; (IPC1-7): C22C38/00; C22C38/06; C22C38/60
Attorney, Agent or Firm:
Junzo Ogawa (1 person outside)
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