Abstract: A bond material for a metal single layer abrasive tool, and especially for a tool with diamond abrasive, provides an excellent combination of mechanical properties including structural strength and impact resistance. The bond material is sufficiently compatible with both metal and diamond to effectively wet the abrasive grains and the core of the tool during brazing. The bond material can braze at a temperature range low enough that the core will not distort and diamond grains will not graphitize during brazing. The novel bond material composition contains a copper/tin bronze alloy; elemental titanium; zirconium; hard granular wear resistant particles; and elemental carbon. The wear resistant particles are preferably titanium carbide. Importantly, the bond produced from the material has superior wear resistance while remaining very adhesive to diamond.

Abstract: Coated abrasives suitable for very fine abrading applications can be obtained by depositing formulations comprising abrasive grits, fillers, grinding aid, additives and a binder resin and in patterns on a surface using a rotogravure technique providing the viscosity is controlled such that the formulation deposited does not lose its shape prior to cure.

Abstract: A composite, polymer bonded abrasive wheel is disclosed for grinding operations and especially for use with multiple station, glass beveling machines. The abrasive wheel breaks in quickly and delivers consistent performance with little or no dressing needed over the entire life of the wheel. In one aspect, the novel abrasive wheel includes a concentrically mounted, annular abrasive rim on a cup shaped hub. The rim can contain an abrasive such as diamond or cubic boron nitride which is embedded in a bonding composition that includes amino aldehyde and phenolic thermoset polymers, a plasticizer, and optionally filler. The hub includes a crosslinkable, strong and rigid, engineering polymer, preferably melamine phenolic thermoset polymer, mixed with spodumene in amount effective to make the coefficient of thermal expansion of the hub match that of the rim. The wheel can be made by simultaneously hot pressing rim and hub preforms and without an additional baking step.

Abstract: Coated abrasives suitable for very fine abrading applications can be obtained by depositing a layer of a formulation comprising abrasive grits, fillers, grinding aid, additives and a binder resin on a substrate in the form of a structured abrasive and then adhering to the surface of the structured abrasive a functional powder.

Abstract: A bond for a single layer metal bond abrasive tool can be easily chemically and electrochemically stripped from the metal core of a recovered used tool to facilitate reuse of the core. Relative to conventionally bonded tools, the speed of stripping the novel bond is quick, and the stripped core has a smooth, clean surface which needs only minimal mechanical repair prior to reuse. In one aspect, the novel bond consists essentially of a ternary bond composition of copper, tin and titanium, in which the copper and tin are pre-alloyed and the pre-alloy and titanium component are incorporated in the bond composition as fine particle size powders. In another aspect, the bond is a quaternary bond composition consisting essentially of copper, tin, titanium and silver. The powder components can be used dry or mixed with a fugitive liquid binder as a paste. The novel bond can be brazed at lower temperature than copper/tin/titanium bonds prepared otherwise.

Abstract: Uncured molded abrasive articles having low volatile organic chemical content are prepared using water as a temporary binder. The abrasive articles preferably contain a uniformly coated abrasive grain comprising a novolac resin having a phenol:formaldehyde ratio of 1:0.2 to 1:0.35 and containing less than 0.5% free phenol.

Abstract: Substantial cost saving can be realized in a coated abrasive structure employing a plurality of layers of particulate material, if at least one of the under-layers of particles is provided by a layer of ground glass.

Abstract: An elastomeric mount or band is provided for circumferential placement about a bonded abrasive segment of the type generally used to form a segmented grinding wheel assembly of a rotary surface grinder. The band serves to cushion the segment relative to a chuck of the grinder. The band is provided with a predetermined original or untensioned circumference and is elastically deformable or stretchable to a larger circumference within a predetermined range of circumferences. This ability to elastically deform facilitates installation onto the segment and enables a single band to be used in combination with segments of various size. The band is preferably installed over a segment having a circumference greater than the band's original circumference so that tension in the installed band serves to mechanically fasten the band in position thereon. This mechanical fastening enables a user to easily move the band to various locations on the segment as desired.

Abstract: A molded bonded abrasive grinding wheel adapted for relatively rough grinding operations is provided with a plurality of protuberances spaced in a predetermined pattern along the peripheral surface thereof and extending substantially orthogonally therefrom to define a textured grinding face. The protuberances are molded integrally with the grinding wheel and are formed by placing a perforated, or textured annular insert in a grinding wheel mold during molding wherein the insert is molded in-situ about the peripheral surface of the grinding wheel. The insert is removed from the peripheral surface after molding or during grinding to expose the protuberances defined by the perforations of the insert.

Abstract: An abrasive article having certain minimum levels of permeability to fluids comprises about 40 to 80%, by volume interconnected porosity and effective amounts of abrasive grain and bond to carry out soft grinding and deep cut grinding operations. The high permeability to the passage of fluids and interconnected porosity provides an open structure of channels to permit the passage of fluid through the abrasive article and the removal of swarf from the workpiece during grinding operations.

Abstract: An efficient method for manufacturing bonded abrasive articles comprises the use of elongated abrasive grain having a length to cross-sectional width aspect ratio of at least 5:1 to yield abrasive articles which are highly permeable to the passage of fluids. A method for measuring permeability is provided. The abrasive articles are used to carry out soft grinding and deep cut grinding operations. The permeable abrasive articles provide an open structure of pores and channels permitting the passage of fluid through the abrasive article and the removal of swarf from the workpiece during grinding operations.

Abstract: The reliability of a braze joint formed between a diamond film and a tungsten carbide body is increased by use of a vanadium-containing braze. The braze joint exhibits an average shear strength greater than about 40,000 pounds per square inch, (276 MPa) and the braze exhibits a contact angle with the diamond film of less than about 15.degree..

Abstract: The present invention is a high speed cutting belt for cutting various aggregate and non-aggregate, natural stone and composite building materials with steel or non-steel reinforced materials. The cutting belt comprises a tensile member base, a plurality of cutting segments brazed with brass shim stock to anchors and crimped to the tensile member base, and molded in urethane to form a continuous, flexible belt, said belt having a 90.degree. "V" shaped bottom inner surface and a flat, outer top surface.

Abstract: A vitreous bonded abrasive grinding wheel comprises silicon carbide abrasive grain, hollow ceramic spheres and a low temperature, high strength bond. The wheel has improved corner or profile holding characteristics and improved mechanical properties and is suitable for grinding non-ferrous materials.

Abstract: Coated abrasive materials can be made from a backing material with abrasive particles adhered to the backing through an orienting layer in the form of a mesh of a size and dimensions to ensure that the orientation of the grits substantially perpendicular to the coating material is maintained.

Abstract: Textured indentations in the cutting surface of the core of a cutting tool are designed to accommodate a single layer of superabrasive grain. The superabrasive grain contained in these textured indentations is thereby oriented during metal bond brazing such that a cutting edge of the superabrasive grain is oriented outward from the plane of the cutting surface of the core. Enhanced bond life, cutting performance and tool life are achieved.

Abstract: Uncured molded abrasive articles having low volatile organic chemical content are prepared using water as a temporary binder. The abrasive articles preferably contain a uniformly coated abrasive grain comprising a novolac resin having a phenol:formaldehyde ratio of 1:0.2 to 1:0.35 and containing less than 0.5% free phenol.

Abstract: A method is disclosed for making a wear component that includes providing a base surface, producing a synthetic diamond film having at least a particular equivalent strain, and applying the diamond film to the base surface. A method is also disclosed for producing synthetic diamond for use as a wear surface, by chemical vapor deposition wherein the equivalent strain of the synthetic diamond is monitored, and deposition parameters are modified when the equivalent strain of the synthetic diamond is less than a predetermined percentage.

Abstract: Dry milling an alpha alumina precursor produces direct conversion to alpha alumina at room temperature.

Abstract: A coated abrasive suitable for fining operations on contoured surfaces is obtained by depositing an abrasive/bond mixture in a discontinuous pattern on the surface of a backing that is stretchable in such a fashion that the finished product remains stretchable.