Title:
LOW ALLOY TOOL STEEL HAVING EXCELLENT MACHINABILITY AFTER THERMAL REFINING
Document Type and Number:
Japanese Patent JP3558600
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a low-alloy tool steel that has good machinability free from deterioration after thermal refining even when its hardness exceeds 55HRC.
SOLUTION: The low alloy tool steel has a composition containing, by mass, 0.6 to 0.90% C, 0.50 to 2.00% Si, 0.50 to 2.00% Mn, 0.001 to 0.030% P, 0.030 to 0.150% S, 0.50 to 2.00% Cr, 0.20 to 0.70% Mo, 0.02 to 0.10% V, 0.0002 to 0.0090% Al, 0.0001 to 0.0035% Ti, 0.0010 to 0.0090% N, 0.0001 to 0.0020% O, 0.0001 to 0.0009% Mg, 0.0005 to 0.02% Ca and ≤0.0002% H.
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Inventors:
Junji Yoshida
Takeshi Tonomura
Takeshi Tonomura
Application Number:
JP2001034285A
Publication Date:
August 25, 2004
Filing Date:
February 09, 2001
Export Citation:
Assignee:
Japan High Frequency Steel Industry Co., Ltd.
International Classes:
C22C38/00; C22C38/38; C22C38/60; (IPC1-7): C22C38/00; C22C38/38; C22C38/60
Domestic Patent References:
| JP11061331A |
Attorney, Agent or Firm:
Masanori Fujimaki