Sandvik Intellectual Property Ab

Sandvik Mining and Construction Tools Ab

Malin Mårtensson

Gerold Weinl

Susanne Norgren

Mirjam Lilja

Anna Ekmarker

Krystof Turba

Anand Goswami

Shailesh Prabhune

Ida Borgh

Kerstin Lundin

Shirishkumar Bhosale

Johan SUNDSTRÖM

José Maria TarragÓ Cifre

Joannis Arvanitidis

Martin Hansson

The invention relates to a cermet body essentially free from nitrogen where the binder phase is Co in an amount of from about 5 to about 25 vol % Co, further comprising TiC and WC in amounts so that the atomic Ti:W ratio is from about 2.5 to about 10. The cermet body further comprising Cr in an amount such that the atomic Cr:Co ratio is from about 0.025 to about 0.14. The cermet body is free from nucleated of Ti&#x2014;W&#x2014;C cores. The invention also relates to a method of making a cermet body.

Cermet body and a method of making a cermet body

A TiC-based cermet body includes TiC and WC so that the atomic ratio Ti/W is between 2 to 5, and cobalt as the binder phase is present in an amount of between 5 to 25 vol %. Further, the cermet body has at least one element from group V of the periodic table, M, so that the atomic ratio Ti/Mis between 4 to 20 and the atomic ratio W/Mis between 1 to 6. The cermet body also has Cr in an amount such that the atomic Cr/Co ratio is from 0.025 to 0.14. The cermet body includes both undissolved TiC cores with a rim of (Ti,W,M)C alloy as well as (Ti,W,M)C grains which have been formed during sintering. A method of making a cermet body is also disclosed.

The present invention relates to a cuffing insert for turning in heat resistant superalloys and stainless steels comprising a very fine grained hard substrate and a coating. The substrate comprises WC from about 5 to about 8 wt % Co and from about 0.3 to about 1.5 wt % Cr. In addition to that ppm levels of Ti and Ta are present. The ratio of Me/Co=(at-% Ti+ at-% Nb+ at-% Ta)/at-% Co is lower than or equal to about 0.014&#x2212;(CW_Cr)*0.008 and higher than about 0.0005. The average sintered WC-grain size is from about 0.5 to about 0.95 &#x3bc;m and CW_Cr from about 0.75 to about 0.95. The cemented carbide body is coated with a PVD TiAlN-coating with an average composition of x being greater than about 0.4 but less than about 0.9, present as a single or multilayer coating with a total thickness of from about 1 to about 6 &#x3bc;m.

Fine grained cemented carbide cutting tool insert

The present invention relates to a method of producing a composite diamond body from powders of diamond particles and powders forming a binder phase comprising cobalt powder having mainly a fcc-structure and a grain size (FSSS) of from about 0.2 to about 2.9 &#x3bc;m., with a pressing and sintering operation. The present invention also relates to a composite diamond body made according to the method.

Method of making a composite diamond body

Growing community of inventors

Nacka, Sweden

Malin Mårtensson