Abstract: A hot workable ferric stainless steel alloy resistant to thermal cyclic stress and oxidation at elevated temperatures having improved mechanical properties rendering it especially suitable as a substrate for exhaust gas purifying applications, such as catalytic converters or heating applications, has a composition including (in weight-%): C ≦0.05%; Cr 16.0-24.0%; Ni more than 1.0-15.0%; Al 4.5-12.0%; Mo + W ≦4.0%; Mn ≦1.0%; Si ≦2.0%; Zr + Hf ≦0.1%; REM ≦0.1%; N ≦0.05%; and balance Fe and normally occurring steelmaking impurities and additions.

Abstract: A tool holder for holding a cutting insert includes a head on which an insert-support surface is disposed. A plate is mounted on the head by a serrated connection, the head including fingers that form side surfaces disposed on opposing sides of the support surface. Each of the side surfaces includes a recess, wherein each side surface defines spaced apart contact areas. A slot extends through one of the fingers in spaced relationship to the side surface formed by that finger to render that side surface flexible. A passage interconnects an intermediate portion of that flexible side surface and an intermediate portion of the slot.

Abstract: Two components used in a percussive drill string include a spigot and a sleeve, respectively. The spigot includes a male thread connected to a female thread of the sleeve to form a thread joint. The male and female threads are dimensioned such that axially inner and outer end areas of the female thread are in non-engagement with the male thread when the thread joint is in a tightened state. The spigot includes axially inner and outer conical guiding surfaces facing toward respective axially outer and inner conical guiding surfaces, respectively. Each conical guiding surface forms an angle with a centerline of the sleeve, the angle lying in the range 1 to 20 degrees, to prevent the spigot and the sleeve from being welded together by frictional heat during a drilling operation.

Abstract: A tool assembly includes a support body, a clamping device, and a tool holder clamped in a groove of the support body. A stopper block is disposed in the groove and abuts against the tool holder for positioning the tool holder along an axis. The stopper block is held in place by a wedge-type stopper clamp which applies a clamping force to the stopper block in a direction transversely of the axis. A wedge-type holder clamp is provided for applying a clamping force to the tool holder in a direction transversely of the axis. The stopper clamp is secured to the support body by a single fastening bolt, and the holder clamp is attached to the support body by a single fastening bolt. Each of the fastening bolts is provided with a part that forcefully pushes the respective clamp away from the support body in response to loosening of the fastening bolt. The arrangement is such that the tool holder can be inserted and removed without completely removing the holder clamp or its fastening bolt.

Abstract: A method of producing an FeCrAl material by gas atomization, and a high temperature material produced by the method. In addition to containing iron (Fe), chromium (Cr), and aluminium (Al) the material also contains minor fractions of one or more of the materials molybdenum (Mo), hafnium (Hf), zirconium (Zr), yttrium (Y), nitrogen (N), carbon (C) and oxygen (O). The smelt to be atomized contains 0.05-0.50 percent by weight tantalum (Ta) and less than 0.10 percent by weight titanium (Ti). Nitrogen gas (N2) is used as an atomizing gas, to which an amount of oxygen gas (O2) is added, the amount of oxygen gas being such as to cause the atomized powder to contain 0.02-0.10 percent by weight oxygen (O) and 0.01-0.06 percent by weight nitrogen (N).

Abstract: An indexible turning tool for chip forming machining, includes a holder equipped with insert pockets receiving replaceable inserts, as well as a securing portion intended to be received in a tool machine. At least one of the replaceable inserts has a main plane that extends laterally in relation to the tool's axial direction.

Abstract: A titanium based carbonitride alloy containing Ti, Nb, W, C, N and Co. The alloy also contains, in addition to Ti, 9-14 at % Co with only impurity levels of Ni and Fe, 1-<3 at % Nb, 3-8 at % W and has a C/(C+N) ratio of 0.50-0.75. The amount of undissolved Ti(C,N) cores should be kept between 26 and 37 vol % of the hard constituents, the balance being one or more complex carbonitrides containing Ti, Nb and W. The alloy is particularly useful for milling of steel.

Abstract: A threading tool for generating a thread in a workpiece, includes a threading part which defines a longitudinal axis. A cooling channel extends inside of the threading part along the axis to a front end surface thereof for supplying a coolant. Longitudinally extending passages are disposed in an outer periphery of the threading part for the return of coolant exiting the coolant channel. A diversion element is positioned at the front end surface for diverting the exiting coolant in a laterally outward direction along the front end surface toward the passages.

Abstract: A titanium based carbonitride alloy contains Ti, Nb, W, C, N and Co. The alloy also contains, in addition to Ti, Co with only impurity levels of Ni and Fe, 4-7 at % Nb, 3-8 at % W and has a C/(C+N) ratio of 0.50-0.75. The Co content is 9-<12 at % for general finishing applications and 12-16% for semifinishing applications. The amount of undissolved Ti(C,N) cores must be kept between 26 and 37 vol % of the hard constituents, the balance being one or more complex carbonitrides containing Ti, Nb and W. The invented alloy is particularly useful for semifinishing of steel and cast iron.

Abstract: The present invention relates to a duplex stainless steel alloy with austenite-ferrite structure, which in hot extruded and annealed finish shows high strength, good corrosion resistance, as well as good weldability which is characterized in that the alloy contains in weight-% max 0.05% C, 0-2.0% Si 0-3.0% Mn, 25-35% Cr, 4-10% Ni, 2-6% Mo, 0.3-0.6% N, as well as Fe and normally occurring impurities and additions, whereby the content of ferrite is 30-70%.

Abstract: A coated sintered cemented carbide body includes a cemented carbide body, a first layer adjacent the cemented carbide body, the first layer including Ti(C,N) and having a thickness of from about 3 to about 20 &mgr;m, an alumina layer adjacent said first layer, the alumina layer including &agr;-Al2O3 or &kgr;-Al2O3 and having a thickness of from about 1 to about 15 &mgr;m, and a further layer adjacent the aluminum layer of a carbide, carbonitride or carboxynitride of one or more of Ti, Zr and Hf, the further layer having a thickness of from about 1 to 15 &mgr;m. A friction-reducing layer, including one or more of &ggr;-Al2O3, &kgr;-Al2O3 and nanocrystalline Ti(C,N) and having a thickness of from about 1 to about 5 &mgr;m, can be adjacent to the further layer. A method to cut steel with a sintered cemented carbide body where the alumina is &agr;-Al2O3 and a method to cut cast iron with a sintered cemented carbide body where the alumina is &agr;-Al2O3.

Abstract: A rotary cutting tool includes a cutting part having helical grooves formed in an outer periphery thereof. Each groove forms a helix angle relative to the axis of rotation which gradually transforms into a smaller cutting face angle at a front end of the cutting action.

Abstract: An insert holder includes a head having ridge teeth, and an insert seat plate seated on the head such that ridge teeth thereof mesh with the ridge teeth of the head. The plate forms a V-shaped recess in which a cutting insert is to be received. The recess thus defines a position of support for the insert. A bisector of the V-shaped recess extends parallel to the ridge teeth. The insert seat plate is adjustable in the direction of the bisector (e.g., by individually deployable spacer plates of different thickness) to adjust the position of support defined by the V-shaped recess.

Abstract: A cutting bit for a milling tool includes a flat upper face which at least partially serves as a rake face, and a lower support face which is substantially parallel thereto. The upper face and the lower face are connected together by a peripherally extending edge face. The edge surface includes six sides each interconnecting the upper and lower faces. Each side includes first and second faces oriented in non-coplanar relationship, wherein each first face intersects the upper face to form therewith a secondary cutting edge, and each second face intersects the upper face to form therewith a main cutting edge arranged non-colinearly with respect to the secondary cutting edge. A alternating ones of the first faces form a first angle of substantially 60° to one another, and alternating ones of the second faces form a second angle of substantially 60° to one another.

Abstract: A body is at least partially coated with one or more refractory layers of which at least one layer is of a fine grained &kgr;-Al2O3. Said &kgr;-Al2O3 layer has equiaxed grains with an average grain size of <0.5 &mgr;m. The Al2O3 layer also has at least one sublayer containing Al, Si and O. The fine grained &kgr;-Al2O3 microstructure is obtained by periodically introducing a silicon halide, preferably SiCl4, during the Al2O3-process.

Abstract: A coated sintered cemented carbide body includes a cemented carbide body, a first layer adjacent the cemented carbide body, the first layer including Ti(C,N) and having a thickness of from about 3 to about 20 &mgr;m, an alumina layer adjacent said first layer, the alumina layer including &agr;-Al2O3 or &kgr;-Al2O3 and having a thickness of from about 1 to about 15 &mgr;m, and a further layer adjacent the aluminum layer of a carbide, carbonitride or carboxynitride of one or more of Ti, Zr and Hf, the further layer having a thickness of from about 1 to 15 &mgr;m. A friction-reducing layer, including one or more of &ggr;-Al2O3, &kgr;-Al2O3 and nanocrystalline Ti(C,N) and having a thickness of from about 1 to about 5 &mgr;m, can be adjacent to the further layer. A method to cut steel with a sintered cemented carbide body where the alumina is &agr;-Al2O3 and a method to cut cast iron with a sintered cemented carbide body where the alumina is &agr;-Al2O3.

Abstract: A rock drill bit for percussive drilling, especially top hammer drilling, includes a drill head provided with rock removing members. The rock drill bit is provided with a number of external grooves for conducting cuttings, the grooves extending in the axial direction of the rock drill bit. Formed between adjacent grooves are lands which also extend in the axial direction of the rock drill bit. The rock drill bit has a thread for connection of the rock drill bit to a drill rod. Rear end portions of at least some of the lands define retrac teeth. Each retrac tooth has at least one cutting edge. At least some of the lands comprise a chip surface and a clearance surface that form therebetween an edge angle not greater than 100°.

Abstract: A cutting bit includes a steel body on which a carbide cutting tip is brazed. Disposed rearwardly of a rearwardmost end of the tip, on a tapered side surface of a head of the bit body is an annular ledge which extends laterally outwardly sufficiently far to deflect cuttings laterally away from the bit. The ledge can be formed integrally with the bit body as the result of a machining operation, or the ledge can comprise a split ring that is elastically held in a groove formed in the tapered side surface. The ledge extends perpendicularly to a center axis of the bit, or is inclined slightly forwardly, in order to trap cuttings, such as asphalt, to cause a protective ring of asphalt to be formed in front of the ledge.

Abstract: A new method and apparatus for manufacturing powders of cemented carbide, cermets, ceramics and similar materials with good abrasive wear resistance starting from a slurry, wherein the slurry is introduced into a drop forming device including at least one essentially horizontal oriented rotating drop forming disk (12), from which the drops are slung out to solidify by centrifugal force.