A method for producing a tire rasp blade for mounting on a rasp hub is described. The tire rasp blade has a blade body and blade teeth. A main part of the tire rasp blade is austenitized by heating the main part to an austenitization temperature. The tire rasp blade is then tempered. The austenitizing process is performed by induction heating the tire rasp blade until the austenitization temperature is reached. The austenitizing process is followed by a quenching process, wherein the quenching is started before austenitization temperature is reached, whereby the quenching process briefly overlaps the induction heating. A tire rasp blade is also described.

A method for producing a tire rasp blade for mounting on a rasp hub is described. The tire rasp blade has a blade body and blade teeth. A main part of the tire rasp blade is austenitized by heating the main part to an austenitization temperature. The tire rasp blade is then tempered. The austenitizing process is performed by induction heating the tire rasp blade until the austenitization temperature is reached. The austenitizing process is followed by a quenching process, wherein the quenching is started before austenitization temperature is reached, whereby the quenching process briefly overlaps the induction heating. A tire rasp blade is also described.

Provided are a high-speed tool steel having excellent hot workability, and excellent damage resistance when made into various tools; a material for tools, and a method for producing the same. The high-speed tool steel contains, in mass %, 0.9-1.2% of C, 0.1-1.0% of Si, 1.0% or less of Mn, 3.0-5.0% of Cr, 2.1-3.5% of W, 9.0-10.0% of Mo, 0.9-1.2% of V, 5.0-10.0% of Co, 0.020% or less of N, and the remainder being Fe and impurities, wherein an M value calculated by a formula satisfies 1.5M value1.5. Formula: M value=9.500+9.334[% C]0.275[% Si]0.566[% W]0.404[% Mo]+3.980[% V]+0.166[% Co], where the characters in brackets [ ] indicate the contained amounts (mass %) of the respective elements. The present invention also pertains to: a material for tools, which is obtained by using the high-speed tool steel; and a method for producing the material for tools.

The disclosure relates to a process for the manufacture of a steel component comprising a fine-grained martensite structure component. The process comprises the steps of providing a steel component having an initial steel composition; introducing nitrogen into the steel component at a temperature T1 above 950? C., thereby creating an at least partly austenitic nitrogen-containing steel component; bringing the at least partly austenitic nitrogen-containing steel component to a temperature T2, such that austenite is decomposed into a steel component comprising at least an amount of carbon- and/or nitrogen-containing precipitates; bringing the steel component comprising at least an amount of carbon- and/or nitrogen-containing precipitates to a temperature T3 which is above T2, thereby creating an at least partly austenitic nitrogen-containing steel component optionally comprising at least an amount of carbon- and/or nitrogen-containing precipitates; and bringing the at least partly austenitic nitrogen-containing steel component to a temperature T4 that is below a martensite start temperature of the at least partly austenitic nitrogen-containing steel component for initiating transformation of at least some of the austenite into fine-grained martensite, thereby producing a steel component comprising a fine-grained martensite structure component.

The present disclosure relates to a martensitic stainless steel suitable for rock drill steel rods. Furthermore, the present disclosure also relates to the use of the martensitic stainless steel and to products manufactured thereof, especially drill rods.

The present disclosure relates to a drill component having a martensitic stainless steel which has good corrosion resistance in combination with optimized and well-balanced mechanical properties, such as high hardness, resistance against wear and abrasion, high tensile strength and high impact toughness.

The present disclosure relates to a drill component having a martensitic stainless steel which has good corrosion resistance in combination with optimized and well-balanced mechanical properties, such as high hardness, resistance against wear and abrasion, high tensile strength and high impact toughness.

A method of forming an earth-boring tool includes forming a tool body including at least one inverted cutting element pocket, at least a portion of the at least one inverted cutting element pocket having a profile substantially matching a profile of an actual cutting element to be secured within a cutting element pocket to be formed by subsequently machining the at least one inverted cutting element pocket. Hardfacing material may be applied to portions of the tool body. The actual cutting element pocket is formed by removing material of the tool body within the at least one inverted cutting element pocket subsequent to applying the hardfacing material to portions of the tool body. A cutting element is affixed within the actual cutting element pocket.

A method of forming an earth-boring tool includes forming a tool body including at least one inverted cutting element pocket, at least a portion of the at least one inverted cutting element pocket having a profile substantially matching a profile of an actual cutting element to be secured within a cutting element pocket to be formed by subsequently machining the at least one inverted cutting element pocket. Hardfacing material may be applied to portions of the tool body. The actual cutting element pocket is formed by removing material of the tool body within the at least one inverted cutting element pocket subsequent to applying the hardfacing material to portions of the tool body. A cutting element is affixed within the actual cutting element pocket.

A method, performed by a centrifuge, for treating toughness and hardness of drill bit buttons is provided. The centrifuge comprises a chamber formed by a stationary side wall and a bottom which is rotatable around a rotation axis, the bottom comprising one or more protrusions which at least partly extends between the rotation axis and the side wall, the side wall comprising at least six pushing elements arranged around a periphery of the side wall. The method comprises rotating, by rotation of the bottom with the protrusions, the drill bit buttons around the rotation axis, pushing, by the pushing elements, the drill bit buttons from the side wall during the rotation of the bottom, collectively forming the drill bit buttons into a torus shape at the bottom of the chamber for inducing collisions between the drill bit buttons, thereby treating the toughness and hardness of the drill bit.