STEEL FOR MACHINE STRUCTURE EXCELLENT IN MACHINABILITY AND COLD FORGEABILITY

Title:

STEEL FOR MACHINE STRUCTURE EXCELLENT IN MACHINABILITY AND COLD FORGEABILITY

Document Type and Number:

Japanese Patent JPH0734190

Kind Code:

A

Abstract:

PURPOSE: To impart a steel for machine structures jointly with machinability and cold forgeability.

CONSTITUTION: This steel has a compsn. contg., by mass, 0.1 to 1.5% C, <0.5% 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, moreover contg. one or ≥ two kinds selected from 0.1 to 3.0% Ni, 0.1 to 3.0% Cu and 0.1 to 3.0% Co, furthermore contg. one or ≥two kinds selected from 0.005 to 0.15% P, 0.005 to 0.25% S, 0.003 to 0.10% Se, 0.0002 to 0.30% Ca, 0.002 to 0.5% Te, 0.03 to 0.30% Pb and 0.01 to 0.3% Bi as machinability improving elements, and the balance substantial Fe and has a metallic structure mainly consisting of ferrite and graphite.

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Inventors:

HOSHINO TOSHIYUKI
IWAMOTO TAKASHI
MATSUZAKI AKIHIRO
AMANO KENICHI

Application Number:

JP17648293A

Publication Date:

February 03, 1995

Filing Date:

July 16, 1993

Export Citation:

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Assignee:

KAWASAKI STEEL CO

International Classes:

C22C38/00; C22C38/06; C22C38/16; C22C38/54; C22C38/58; (IPC1-7): C22C38/00; C22C38/06; C22C38/16; C22C38/54

Attorney, Agent or Firm:

Junzo Ogawa (1 person outside)

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