Title:
【発明の名称】硬質層被覆炭化タングステン基超硬合金製切削工具の製造法
Document Type and Number:
Japanese Patent JP2910293
Kind Code:
B2
Abstract:
PURPOSE:To offer a method for manufacturing a cutting tool made of a hard layer-coated WC base-sintered hard alloy showing excellent performance for high-speed cutting and heavy cutting such as high feeding and high notching. CONSTITUTION:This is a method for manufacturing a cutting tool made of a hard layer-coated WC base-sintered hard alloy in which a green compact obtd. by subjecting prescribed raw material powder to compacting is held to 1380 to 1500 deg.C in a vacuum atmosphere, then its atmosphere is changed from a vacuum one to a carburizing one while its temp. is held to the above one, and sintering is finished while its atmosphere is held to the above carburizing one, thereafter, it is annealed at 0.3 to 3.0 deg.C/min cooling rate to manufacture a WC base-sintered hard alloy base body, and the surface of the above WC base-sintered hard alloy is coated with a hard layer.
Inventors:
OKADA GIICHI
SUGAWARA ATSUSHI
SUGAWARA ATSUSHI
Application Number:
JP8464991A
Publication Date:
June 23, 1999
Filing Date:
March 25, 1991
Export Citation:
Assignee:
MITSUBISHI MATERIARU KK
International Classes:
B22F7/00; B22F3/10; B22F3/24; B23P15/28; C22C1/05; (IPC1-7): B22F3/10; B23P15/28; C22C1/05
Domestic Patent References:
| JP55164071A | ||||
| JP6134103A | ||||
| JP52152805A |
Attorney, Agent or Firm:
Kazuo Tomita (1 person outside)