Abstract:
A pick tool (100) comprising an insert (110) and a steel holder (120) for the insert (110), the insert (110) comprising a superhard tip (112) joined to a cemented carbide support body (114) having an insertion shank (118); the steel holder (120) comprising a shaft (122) for connection to a tool carrier (not shown) and provided with a bore (126) configured for receiving the insertion shank (118); the volume of the cemented carbide support body (114) being at least 6 cm3.
Abstract:
The invention relates to a wear part or tool comprising a body containing an iron-group metal or alloy, a wear-resistant layer metallurgically bonded to a surface of the body through an intermediate layer, characterised in that the wear-resistant layer comprises at least 13 vol. % of grains of metal carbide selected from the group consisting of WC, TiC, VC, ZrC, NbC, Mo2C, HfC and TaC and grains of (Cr1Me)xCy and a metal based phase comprising of a solid solution of 0.5 to 20% Cr, 0.2 to 15% Si1 and 0.2 to 20% carbon, where Me is Fe, Co and/or Ni; and the intermediate layer has a thickness of 0.05 to 1 mm and comprises Si in amount of 0.1 to 0.7 of that in the wear-resistant layer, chromium in amount of 0.1 to 0.6 of that in the wear-resistant layer and the metal of the metal carbide in amount of 0.2 to 0.6 of that in the wear-resistant layer and to a method of producing such a wear part.
Abstract:
A pick assembly (100) comprising a pick tool (200), a pick holder (300) and a rotatable drive means (400); in which the pick holder is attached to the rotatable drive means and the pick tool comprises a base (220) and a strike element (210) capable of being attached to the base, the strike element comprising a strike tip (212) defining a strike tip axis (213) and the base capable of being attached to the pick holder; the pick holder and pick tool being configured in relation to the drive means operative to the strike tip axis being oriented to within a strike angle of at most 5 degrees with a strike plane on which the strike tip will travel when driven by the drive means.
Abstract:
An insert (110) for a degradation assembly comprising a holder, the insert (110) comprising a tip (112), a coupler mechanism (114) for moveably coupling the insert with the holder, and an alignment mechanism operable to urge the tip (112) towards an aligned orientation within the holder; the aligned orientation being with respect to a forward direction (M) in which the insert (110) is to be driven in use.
Abstract:
An attack tool assembly (10) comprising an attack tool having a shank (23) extending therefrom, the shank (23) having a longitudinal axis; and a holder having a holder body (31) and a bore for receiving the shank (23) of the attack tool (10); the holder being adapted to receive the shank (23) in a configuration in which it prevents the shank (23) from rotating relative to the bore when the holder is in an engaged condition, and in which it allows the shank (23) to be rotatable relative to the bore when the holder is in a disengaged condition, so as to enable the shank (23) to be selectively securable to the holder in a required orientation about the longitudinal axis. The attack tool assembly (10) is particularly but not exclusively for use in the degradation of rock or asphalt bodies for formations, such as in soft rock mining and asphalt milling.
Abstract:
The invention relates to a superhard element (10) comprising a polycrystalline superhard structure (20) joined at an interface to a hard-metal body (30) comprising metal carbide grains bonded together by a metal binder,- the polycrystalline superhard structure comprising a superhard material; the hard-metal body comprising a surface region (32) proximate the interface and a core region (36) remote from the interface, the surface and the core regions being contiguous, the mean binder fraction in the core region being less than that in the surface region and to a method of making a hard-metal body for such an element.
Abstract:
The invention relates to a wear part or tool comprising a body containing an iron-group metal or alloy, a wear-resistant layer metallurgically bonded to a surface of the body through an intermediate layer, characterised in that the wear-resistant layer comprises at least 13 vol. % of grains of metal carbide selected from the group consisting of WC, TiC, VC, ZrC, NbC, Mo2C, HfC and TaC and grains of (Cr1Me)xCy and a metal based phase comprising of a solid solution of 0.5 to 20% Cr, 0.2 to 15% Si1 and 0.2 to 20% carbon, where Me is Fe, Co and/or Ni; and the intermediate layer has a thickness of 0.05 to 1 mm and comprises Si in amount of 0.1 to 0.7 of that in the wear-resistant layer, chromium in amount of 0.1 to 0.6 of that in the wear-resistant layer and the metal of the metal carbide in amount of 0.2 to 0.6 of that in the wear-resistant layer and to a method of producing such a wear part.
Abstract:
A method for making a treated super-hard structure, the method including providing a super-hard structure comprising super-hard material selected from polycrystalline cubic boron nitride (PCBN) material or thermally stable polycrystalline diamond (PCD) material; subjecting the super-hard structure to heat treatment at a treatment temperature of greater than 700 degrees centigrade at a treatment pressure at which the super-hard material is not thermodynamically stable, for a treatment period of at least about 5 minutes to produce the treated super-hard structure.
Abstract:
An attack tool assembly (10) comprising an attack tool having a shank (23) extending therefrom, the shank (23) having a longitudinal axis; and a holder having a holder body (31) and a bore for receiving the shank (23) of the attack tool (10); the holder being adapted to receive the shank (23) in a configuration in which it prevents the shank (23) from rotating relative to the bore when the holder is in an engaged condition, and in which it allows the shank (23) to be rotatable relative to the bore when the holder is in a disengaged condition, so as to enable the shank (23) to be selectively securable to the holder in a required orientation about the longitudinal axis. The attack tool assembly (10) is particularly but not exclusively for use in the degradation of rock or asphalt bodies for formations, such as in soft rock mining and asphalt milling.
Abstract:
The invention relates to hard-metal body comprising a hard-metal, the hard-metal comprising tungsten carbide grains and metal binder comprising cobalt having a concentration of tungsten dissolved therein, the body comprising a surface region adjacent a surface and a core region remote from the surface, the surface region and the core region being contiguous with each other; the mean binder fraction of the core region being greater than that of the surface region; the mean carbon concentration within the binder being higher in the surface region than in the core region; to tools comprising same and methods of making same.