Title:
SURFACE REFORMING METHOD OF HARD MATERIAL AND CUTTING TOOL
Document Type and Number:
Japanese Patent JP3856891
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To significantly improve durability of a tool by compacting a powder of a hard material essentially comprising WC, calcining the compacted, dipping the body in an alkoxide containing Ti, sintering the calcined body coated with the alkoxide in a nitrogen gas atmosphere to precipitate Ti carbide particles, Ti nitride particles or Ti carbide nitride particles on the surface of the body.
SOLUTION: A hard material powder essentially comprising WC powder and containing TiC powder and TaC powder, etc., is compacted to obtain a compact body, which is calcined at specified temp. in vacuum. Then the calcined body is repeatedly dipped in Ti alkoxide such as tetraisopropoxy Ti, or a mixture alkoxide of Ti alkoxide and La alkoxide. The calcined body coated with the Ti alkoxide is sintered at 1,380 to 1,500°C in a nitrogen gas atmosphere for about one hour to precipitate Ti carbide particles, Ti nitride particles or Ti carbide nitride particles on the surface. Thus, a sintered body having a particle layer of ≥5μm effective thickness is obtd.
Inventors:
Munehiro Funaki
Mitsuo Kuwahara
Kazuhito Hiraga
Tetsuya Oishi
Mitsuo Kuwahara
Kazuhito Hiraga
Tetsuya Oishi
Application Number:
JP5664397A
Publication Date:
December 13, 2006
Filing Date:
March 11, 1997
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
B23B27/14; C04B41/87; B23P15/28; B24D3/06; B24D18/00; C04B35/56; C22C29/06; C23C30/00; (IPC1-7): C04B41/87; B23B27/14; B23P15/28; C04B35/56
Domestic Patent References:
| JP60162782A | ||||
| JP2022454A | ||||
| JP4059969A | ||||
| JP2145772A | ||||
| JP2145773A | ||||
| JP2259080A | ||||
| JP3183662A |
Attorney, Agent or Firm:
Yoichiro Shimoda