Title:
HARD COATING TOOL FOR PLASTIC WORK
Document Type and Number:
Japanese Patent JP3604717
Kind Code:
B2
Abstract:
PURPOSE: To suppress as much as possible phase η which comes into question when a carbonized product forming method is applied to a sintered hard alloy base material so as to sufficiently display a performance, by limiting the composition amount of the Co of the sintered hard alloy, the kind and the layer thickness of the carbonized product, the surface roughness of a tool, etc.
CONSTITUTION: A hard coating tool for plastic work is manufactured by forming one kind or two kinds or more of a carbonized product layer selected from vanadium, niobium and chrome on the surface of a tool made of sintered hard alloy containing 0.1 to 10wt.% Co. This carbonized product layer is made by a treatment dipping boric acid or borate obtained by melting the forming component of the carbonized product into a melting salt bath.
Inventors:
Hiromasa Takeda
Hiroyuki Endo
Hiroyuki Endo
Application Number:
JP5381894A
Publication Date:
December 22, 2004
Filing Date:
March 24, 1994
Export Citation:
Assignee:
Tohoku Special Steel Co., Ltd.
International Classes:
B23P15/28; B21C3/18; B21D37/20; B21J13/02; C23C22/72; (IPC1-7): B21C3/18; B21D37/20; B21J13/02; C23C22/72
Domestic Patent References:
| JP49127833A | ||||
| JP5146820A | ||||
| JP50018328A | ||||
| JP49066544A |
Attorney, Agent or Firm:
Kosaku Sugimura
Yasunori Sato
Norita Tomita
Umemoto Masao
Takashi Nihei
Yasunori Sato
Norita Tomita
Umemoto Masao
Takashi Nihei