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Title:
PROCESS FOR MANUFACTURING ROLLER SHELL OF LOWER RUNNING BODY OF CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2007/043307
Kind Code:
A1
Abstract:
A process for manufacturing a roller shell of lower running body of construction machine, comprising conducting hot forging of a coarse material of medium carbon alloy steel into a base material of roller shell configuration; quenching the base material with the use of heat generated by the hot forging; and discontinuing quench cooling in midstream, conducting high-temperature heat of the core part of the base material to a surface part of the base material and, with the use of the heat, tempering the surface part of the base material. In this process, quenching and tempering are carried out with the use of heat generated by the hot forging, so that heating furnaces for quenching and tempering become unnecessary, thereby enabling reduction of the number of heating furnaces.

Inventors:
TAKENO HIROYUKI (JP)
MORISHIMA GO (JP)
UCHIDA KENZO (JP)
OKAWA KAZUHIDE (JP)
Application Number:
PCT/JP2006/318819
Publication Date:
April 19, 2007
Filing Date:
September 22, 2006
Export Citation:
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Assignee:
TOPY IND (JP)
TAKENO HIROYUKI (JP)
MORISHIMA GO (JP)
UCHIDA KENZO (JP)
OKAWA KAZUHIDE (JP)
International Classes:
C21D9/38; B62D55/14; C22C38/00; C22C38/14; C22C38/58
Foreign References:
JPH02259014A1990-10-19
JP2004060003A2004-02-26
JPS6167716A1986-04-07
JPS63161117A1988-07-04
Attorney, Agent or Firm:
TABUCHI, Tsuneo (Toranomon Keichi Bldg. 5-10, Toranomon 1-chome, Minato-k, Tokyo ., JP)
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