Title:
耐塑性変形性、耐欠損性にすぐれたＷＣ基超硬合金製切削工具および表面被覆ＷＣ基超硬合金製切削工具
Document Type and Number:
Japanese Patent JP7385829
Kind Code:
B2
Abstract:
To provide a WC-based hard metal cutting tool and a surface-coated WC-based hard metal cutting tool, exerting excellent plastic deformation resistance and defect resistance in the intermittent cutting work for alloy steels or the like.SOLUTION: A WC-based hard metal-made cutting tool is characterized in that the cutting tool comprising a WC-based hard metal as a base material consists of in mass%, 6.0 to 14.0% of Co, 0.1 to 1.4% of Cr3C2 and the balance of WC with inevitable impurities, or further includes 4.0 mass% or less in total amount of one or more selected from TaC, NbC, TiC and ZrC, and when analyzing the grain size distribution of a binder phase in the cross section of the hard metal and defining a cumulative 10% grain area as A10 and cumulative 90% grain area as A90, A10 is 0.15 μm2 or more but less than 0.25 μm2 and A90/A10 is 8.0 or more but less than 11.0. In a surface-coated WC-based hard metal-made cutting tool, a hard coating layer is formed on at least a cutting edge of the cutting tool.SELECTED DRAWING: None
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Inventors:
Makoto Igarashi
Keisuke Kawahara
Ryu Ichikawa
Kazuki Okada
Keisuke Kawahara
Ryu Ichikawa
Kazuki Okada
Application Number:
JP2020028532A
Publication Date:
November 24, 2023
Filing Date:
February 21, 2020
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
C22C29/08; B23B27/14
Domestic Patent References:
| JP2001279363A | ||||
| JP2003155537A | ||||
| JP10110233A | ||||
| JP2000514874A | ||||
| JP62260027A |
Foreign References:
| WO2018142181A1 | ||||
| CN101956114A |
Attorney, Agent or Firm:
Koichi Kimura
Yasushi Yamada
Shuichi Kageyama
Yasushi Yamada
Shuichi Kageyama