Title:
CRAWLER PART AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2020/040263
Kind Code:
A1
Abstract:
In the present invention, crawler links (7, 8), which are crawler parts, are made of a steel having a specific constituent composition and comprise high hardness parts (7A, 8A) having a hardness of 57-60 HRC and low hardness parts (7B, 8B). The high hardness parts (7A, 8A) contain: a first matrix phase which contains a martensite phase and a retained austenite phase; and first non-metallic particles which are dispersed in the first matrix phase and contain at least one type selected from the group consisting of MnS, TiCN and NbCN. The high hardness parts do not contain a M23C6 carbide. The low hardness parts (7B, 8B) contain: a second matrix phase which contains a martensite phase; and second non-metallic particles which are dispersed in the second matrix phase and contain at least one type selected from the group consisting of MnS, TiCN and NbCN. The low hardness parts do not contain a M23C6 carbide.
Inventors:
AMADA EIJI (JP)
MAEDA KAZUO (JP)
KOBAYASHI NAOMI (JP)
NODA TAKASHI (JP)
HATANO MAMORU (JP)
AMATA TAKAFUMI (JP)
NEISHI YUTAKA (JP)
MIYANISHI KEI (JP)
NISHIJIMA RYOJI (JP)
MAEDA KAZUO (JP)
KOBAYASHI NAOMI (JP)
NODA TAKASHI (JP)
HATANO MAMORU (JP)
AMATA TAKAFUMI (JP)
NEISHI YUTAKA (JP)
MIYANISHI KEI (JP)
NISHIJIMA RYOJI (JP)
Application Number:
PCT/JP2019/032890
Publication Date:
February 27, 2020
Filing Date:
August 22, 2019
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
NIPPON STEEL CORP (JP)
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; B62D55/20; C21D9/00; C22C38/54
Domestic Patent References:
| WO2014185337A1 | 2014-11-20 |
Foreign References:
| JP2018103963A | 2018-07-05 | |||
| JP2003328078A | 2003-11-19 | |||
| US20150037198A1 | 2015-02-05 |
Attorney, Agent or Firm:
KITANO, Shuhei (JP)
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