Title:
【発明の名称】鋳造品の局部軟化方法
Document Type and Number:
Japanese Patent JP2597031
Kind Code:
B2
Abstract:
PURPOSE:To easily process a cast product by applying annealing under the specific condition after casting to part for executing the processing of the cast product, which is cast by using a metallic mold, and softening. CONSTITUTION:By pouring molten iron composed of cast iron component corresponding to JIS FC20-FC30 into the metallic mold, a cam shaft 1 is cast, and at the time, when the molten iron surface layer part 1a in contact with the metallic mold becomes shell-state solidified layer having high hardness chilled structure, the casting is released from the metallic mold. Under red condition (about 600-900 deg.C) of the cam shaft 1 released from the metallic mold, a journal part 1 as the softening necessary part is rapidly heated to 1000-1100 deg.C with a high frequency heating member 4. At this time, the temp. of part except the journal part 3 is the temp. of A1 transformation point or lower. Under this condition, the annealing for relieving casting stress is executed to the cam shaft 1 by using an electric furnace under condition of 550-600 deg.CX2H and natural cooling is executed. By this method, only the journal part 3 can be softened.
Inventors:
Hideaki Ikeda
Kokusei Takeshi
Nakao Katsuyoshi
Hirohisa Harada
Matsumoto Isao
Seiji Ehara
Kokusei Takeshi
Nakao Katsuyoshi
Hirohisa Harada
Matsumoto Isao
Seiji Ehara
Application Number:
JP10101490A
Publication Date:
April 02, 1997
Filing Date:
April 17, 1990
Export Citation:
Assignee:
Honda motor industry stock company
Denki Kogyo Co., Ltd.
Denki Kogyo Co., Ltd.
International Classes:
B22D27/04; B22D15/00; B22D29/00; C21D1/42; C21D5/00; C21D9/30; C22C37/08; (IPC1-7): C21D5/00; B22D15/00; B22D29/00; C21D1/42; C21D9/30; C22C37/08
Domestic Patent References:
| JP2149640A |
Attorney, Agent or Firm:
Yoichiro Shimoda (2 outside)