Process for the manufacture of multi-layered, coated hardmetal p

Details Process for the manufacture of multi-layered, coated hardmetal p Process for the manufacture of multi-layered, coated hardmetal p

1988-08-30

1990-01-23

Lechert, Jr., Stephen J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

118715, 20419216, 204192362, 20419235, 4272481, 427250, 4272557, 427405, 4274191, 428623, 428627, 428668, 428457, 428698, 428704, 428220, G22F 300

Patent

active

048957704

ABSTRACT:
The invention relates to a process for the manufacture of multi-layered wear-resistant CVD- or PVD-coatings applied to hardmetal parts containing WC-Co or WC-Ni, where at least one of the layers is a metal-boronitride layer. According to the invention, the boron concentration in the metal-boronitride layer is maintained below the critical level above which in addition a homogeneous boronitride mixed crystal phase a further phase, particularly a diboride phase is formed. A non-boronic, or only slightly boronic, intermediate layer is employed as a diffusion barrier between the hardmetal and the metal-boronitride layer to limit or prevent the formation of brittle tungsten cobalt boron or tungsten nickel boron phases on the external surface of the hardmetal. The metallic boronitride layer can be applied either as a single layer or in multiple layers alternating with other mechanically resistant layers. The hardmetal part is particularly a cutting insert for machining.

REFERENCES:
patent: 4236926 (1980-12-01), Lindholm et al.
patent: 4239536 (1980-12-01), Yamamoto et al.
patent: 4293618 (1981-10-01), Hara et al.
patent: 4334928 (1982-06-01), Hara et al.
patent: 4442180 (1984-04-01), Hara et al.
patent: 4686080 (1987-08-01), Hara et al.
patent: 4766040 (1988-08-01), Hillert et al.
1977 French Paper--Preprints of the 9th Plansee Seminar--May 23-26, 1977.
1981 Plansee Seminar--Zemann et al., Proceedings of the 10th Plansee Seminar 1981, vol. 1, pp. 443 ff.

Affiliated with

Also associated with

Rating

Process for the manufacture of multi-layered, coated hardmetal p does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the manufacture of multi-layered, coated hardmetal p, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the manufacture of multi-layered, coated hardmetal p will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-644953