Element Six Abrasives S.a.

Element Six Gmbh

Element Six (uk) Limited

Element Six Abrasives Holdings Limited

Maweja Kasonde

John James Barry

Cornelis Roelof Jonker

Robert Fries

Teresa Rodriguez Suarez

Roger William Nigel Nilen

Valentine Kanyanta

Mehmet Serdar Ozbayraktar

Stig Åke Andersin

Leshope Joseph Choenyane

Erens Tshepo Radebe

Edwin Stewart Eardley

Amanda Lynne Mckie

Richard Stuart Balmer

A cutting element () includes a substrate (); and a body of superhard polycrystalline material () bonded to the substrate () along an interface, the body of superhard polycrystalline material having a peripheral side edge (). The body of superhard polycrystalline material has a cutting surface (); a plurality of spaced apart cutting edges () extending to the cutting surface () through respective chamfer portions (), the cutting edges being spaced around the peripheral side edge; a plurality of recesses/regions () extending from the cutting surface () towards the substrate, adjacent cutting edges () being spaced apart by a respective one of said recesses/regions (); and a protrusion or recessed region extending from the cutting surface about a central longitudinal axis of the cutting element. A method of making such a cutting element is also disclosed.

Cutting element and methods of making the same

A super hard polycrystalline construction is disclosed as comprising a body of super hard material having a first fraction of super hard grains in a matrix of a second fraction of super hard grains. The average grain size of the first fraction is between around 1.5 to around 10 times the average grain size of the second fraction and the first fraction comprises around 5 vol % to around 30 vol % of the grains of super hard material in the body.

Superhard constructions and methods of making same

A polycrystalline super hard construction comprises a body of polycrystalline super hard material and a substrate bonded to the body along an interface. The substrate a first end surface forming the interface, the first end surface comprising a projection extending from the body of the substrate into the body of super hard material towards the cutting face, the body of polycrystalline material extending around the projection. The body of polycrystalline material comprises a first region more thermally stable than a second region, the first region comprising an annular portion located around the projection, the second region extending between and bonding the first region to the substrate. The first region has a thickness from the cutting face along the peripheral side edge to the interface of at least around 3 mm and a portion of the projection has a thickness measured in a plane extending along the longitudinal axis of at least around 3 mm.

A super hard polycrystalline construction comprises a body of polycrystalline super hard material, said body having an exposed working surface, a substrate attached to the body of polycrystalline super hard material along an interface and a plurality of apertures or channels. One or more of said apertures or channels extend(s) from the exposed working surface of the body into the substrate.

A method of making a body of polycrystalline superhard material comprising placing an aggregated mass of grains of superhard material into a canister, placing a ceramic layer either in direct contact with the aggregated mass of grains of superhard material or in indirect contact therewith, the ceramic layer being spaced from the grains by an interlayer of material when present, the ceramic layer having a surface with surface topology, the surface topology imprinting a pattern in the aggregated mass of grains of superhard material complementary to the surface topology, the ceramic material and the material of the interlayer being such that they do not react chemically with the superhard material and/or a sinter catalyst material for the grains of superhard material. The aggregated mass of grains of superhard material and ceramic layer are subjected to a pressure of greater than 5.5 GPa and sintered to form a body of polycrystalline superhard material having a surface topology complementary to the surface topology of the ceramic layer. The ceramic layer and interlayer if present are then removed from the body of polycrystalline material. There is also disclosed a body of polycrystalline superhard material having a surface topology on a first surface, the first surface being substantially free of material from a canister used in formation of the body of polycrystalline superhard material.

Polycrystalline superhard material and method for making same

A tip for twist drill, comprising a super-hard structure joined to a substrate at an interface boundary coterminous with an end of the substrate, the super-hard structure comprising sintered polycrystalline material comprising super-hard grains, the super-hard structure defining a super-hard end surface opposite the interface boundary and a plurality of cutting edges configured for boring into a body in use; the super-hard end surface including a center point or chisel edge, and comprising a plurality of surface regions configured such that respective planes tangential to each of the surface regions are disposed at substantially different angles from the axis of rotation of the tip in use. Precursor constructions for use in manufacturing the tips as well as methods for making the precursor constructions and the tips are disclosed.

Twist drill tips, precursor constructions for use in making same, and methods for making and using same

A tip () for a rotary machine tool comprising a superhard structure () joined to a cemented carbide substrateby means of at least one intermediate layer () disposed between the superhard structure () and the cemented carbide substrate (), the intermediate layer or layers () comprising grains of superhard material and grains of a metal carbide material dispersed in a metal binder material.

Superhard tool tip, method for making same and tool comprising same

A method of making a construction comprising a polycrystalline super-hard structure joined to a side surface of an elongate substrate. The method includes: providing a vessel configured for an ultra-high pressure, high temperature furnace, the vessel having an elongate cavity for containing a pre-sinter assembly and defining a longitudinal axis, the cavity having opposite ends connected by a cavity wall. The pre-sinter assembly comprises the substrate, an aggregation comprising a plurality of super-hard grains arranged over at least a part of the side surface of the substrate, and a spacer structure configured for spacing the substrate apart from the cavity wall. The spacer structure comprises material having a Young's modulus of at least 300 GPa. The method further includes inserting the pre-sinter assembly into the cavity, the substrate being substantially longitudinally aligned and the spacer structure arranged between the side surface of the substrate and the cavity wall; applying a force to the pre-sinter assembly and heating it to a temperature, the force being sufficient to generate a pressure within the vessel for sintering the aggregation at the temperature, and providing the construction.

Method for making super-hard constructions

A cutter element () for a rotary machine tool having an axis of rotation, the cutter element comprising a plurality of cutting edges () defined by at least one cutter structure () comprising superhard material, consecutive cutting edges being spaced apart by at most 10 mm and configured operable to cut a body when moved in a direction that is substantially non-aligned with the axis of rotation.

Cutter elements, rotary machine tools comprising same and method for making same

A method of manufacturing a bit for a rotary drill, the bit including a drill tip (), the method including providing a precursor structure () comprising substrate body () and a super-hard structure () joined to an upper surface of the substrate body; cutting a plurality of conformal inserts () from the precursor structure (), each insert () comprising a part of the super-hard structure; providing a drill tip () configured for receiving the insert (); and joining the insert to the drill tip ().

Growing community of inventors

Oxfordshire, United Kingdom

Maweja Kasonde