Title:
EXCAVATION TOOL SURFACE TREATMENT METHOD, AND EXCAVATION TOOL
Document Type and Number:
Japanese Patent JP2013087581
Kind Code:
A
Abstract:
To provide an excavation tool surface treatment method, and an excavation tool, in which the fatigue strength can be enhanced.
An excavation tool has a tool body that excavates the ground by receiving torque and impact force from a driving system, and a force transmission rod that connects the tool body to the driving system. With respect to the tool body or the force transmission rod subjected to heat treatment, surface treatment to cause compressive residual stress by particle projection is performed at least two times.
Inventors:
HISADA KIMIYA
OTA HIROSHI
HIWASA YONEO
OTA HIROSHI
HIWASA YONEO
Application Number:
JP2011231779A
Publication Date:
May 13, 2013
Filing Date:
October 21, 2011
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP
International Classes:
E21B10/36; C21D1/06; C21D1/10; C21D7/06; C21D9/00
Domestic Patent References:
| JPS61153231A | 1986-07-11 | |||
| JPS5131761B1 | 1976-09-08 | |||
| JPH05339628A | 1993-12-21 | |||
| JP2001277119A | 2001-10-09 | |||
| JP2002361559A | 2002-12-18 | |||
| JP2008307679A | 2008-12-25 | |||
| JPH0978126A | 1997-03-25 | |||
| JPH0457672A | 1992-02-25 | |||
| JPS61265271A | 1986-11-25 |
Foreign References:
| US20030156918A1 | 2003-08-21 |
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Hiroshi Masui
Fumihiro Hosokawa
Tadashi Takahashi
Hiroshi Masui
Fumihiro Hosokawa