Cutting tools and a process for the manufacture of such tools

Details Cutting tools and a process for the manufacture of such tools Cutting tools and a process for the manufacture of such tools

1976-01-19

1977-03-08

Stallard, W.

Metal treatment

Compositions

Heat treating

29182, 75226, 148 31, B22F 316, B22F 500

Patent

active

040111083

ABSTRACT:
The invention relates to a cutting tool containing 25-33 percent by weight of Co and certain amounts of W, Mo, C, B, Zr, Si, Mn, Cr, Ni and Fe containing normal contaminants, W + 2Mo being equal to 20-40 percent by weight, the structure of the tool consisting of a martensitic matrix having a grain size of 5-70 .mu.m, determined as austenite grain size, containing 5-15 percent by volume of an intracrystalline, very homogeneously distributed fine-disperse phase consisting of an intermetallic compound of Fe, Co, W and/or Mo and, between the grains of the base mass, 20-30 percent by volume of a primarily precipitated phase mainly consisting of the same intermetallic compound but having a predominant grain size of 1-2 .mu.m. The invention also relates to a process of preparing such a tool by finely dividing a melt of the composition given and cooling in a non-oxidizing atmosphere to a fine powder, hot-compacting the powder to an ingot, hot-working the ingot to a blank which is allowed to cool and is possibly soft annealed, forming the blank to a tool by reductive machining, solution annealing the tool by heating to the austenitizing temperature, cooling and tempering at least once.

REFERENCES:
patent: 3485620 (1969-12-01), Bieber et al.
patent: 3649256 (1972-03-01), Fletcher
patent: 3649257 (1972-03-01), Fletcher
patent: 3655365 (1972-04-01), Holtz, Jr.
patent: 3746518 (1973-07-01), Holtz, Jr.

Affiliated with

Also associated with

Rating

Cutting tools and a process for the manufacture of such tools does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cutting tools and a process for the manufacture of such tools, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cutting tools and a process for the manufacture of such tools will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1404557