Title:
MANUFACTURE OF STEEL FRAME MOUNTED WITH BLADES OF HARD MATERIAL
Document Type and Number:
Japanese Patent JPS57101602
Kind Code:
A
Abstract:
A method of producing a steel body (1) comprising hard material inserts, (2) particularly a drill bit for rock drilling, in which steel powder is compacted at least partially around the inserts from a cold state to a high density preform. The preform is then sintered and because of the choice of alloy the steel powder shrinks substantially during the sintering. A high strength drill bit is produced in which the inserts may have almost any form, in particular a form optimized for a particular application.
Inventors:
DERIKU REIBOORUDO
Application Number:
JP17151581A
Publication Date:
June 24, 1982
Filing Date:
October 28, 1981
Export Citation:
Assignee:
INST SERATSUKU SA
International Classes:
B22F7/00; B22F7/06; E21B10/52; E21B10/56; (IPC1-7): B22F3/02; B22F5/00; E21B10/52
Previous Patent: JPS57101601
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