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Title:
HEAT TREATMENT OF METALLIC BAR STOCK
Document Type and Number:
Japanese Patent JP3739485
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a method for executing a heat treatment so that a metallic bar stock having thin part and thick part becomes uniform mechanical characteristics.
SOLUTION: In the method for executing the heat treatment, a heating means 2 for partially heating a small range in the metallic bar stock 1 and a cooling means 4 for cooling by injecting cooling medium 3 at the rear part of the heated part 5, are shifted along the metallic bar stock 1. The heat treatment conditions applied to the metallic bar stock 1 with the heating means 2 and the cooling means 4 (shifting speed of the heating means 2 and the cooling means 4, cooling calory with the cooling means 4 or heating temp. with the heating means 2, etc.), are changed with the thin part 1a and the thick part 1c to execute the heat treatment so that the thin part 1a and the thick part 1c become almost uniform mechanical characteristics (hardness, tensile strength, elongation).


Inventors:
Tsuneo Minagawa
Keisuke Yashiki
Application Number:
JP14098696A
Publication Date:
January 25, 2006
Filing Date:
May 10, 1996
Export Citation:
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Assignee:
Dai-ichi Kogyo Kogyo Co., Ltd.
International Classes:
B21D7/00; C21D9/00; B21F1/00; C21D1/42; (IPC1-7): C21D9/00; C21D1/42; //B21D7/00; B21F1/00
Domestic Patent References:
JP60243220A
Attorney, Agent or Firm:
Kyozo Norimatsu