79results about How to "Reduced wear resistance" patented technology

The invention is for a polycrystalfine diamond composite material comprising intergrown diamond particles and a binder phase, the binder phase comprising a tin-based intermetallic or ternary carbide compound formed with a metallic solvent / catalyst. The invention extends to a polycrystalline diamond abrasive compact comprising such a composite material and to a tool insert comprising such a diamond abrasive compact.

An abrasive comprising abrasive particles and an adhesive matrix is provided, with the abrasive particles being distributed in the adhesive matrix, wherein the abrasive particles comprise aluminum hydroxide abrasive particles, and the adhesive matrix comprises a triacrylate, a diacrylate and an initiator. The abrasive article prepared using the abrasive of the present invention has proper wear resistance and can be used to a clean LCD panel surface without scratching the ITO coating on an LCD panel surface.

Disclosed is a lubricant composition which contains an organic molybdenum compound that has a nitrogen (N) atom and / or an oxygen (O) atom and optionally has a sulfur (S) atom in each molecule. The sulfur content in the organic molybdenum compound is 0.5% by mass or less based on the compound. If the lubricant composition is used as a lubricant for a low-friction sliding material, the lubricant composition has an extremely low coefficient of friction. In addition, a sliding mechanism having low friction and excellent wear resistance can be obtained by combining the lubricant composition and a sliding member that has a DLC coating film on the sliding surface.

A gradient cemented carbide with a gradient change in the binder phase and a preparation method thereof, is characterized in that it includes the following steps in sequence: preparing WC-Co powder; adjusting the carbon content of the WC-Co powder, calculating the upper limit of the carbon content with substoichiometric equivalents and Lower limit; add molding agent; press into billet; remove molding agent; vacuum sintering; carburizing heat treatment, heat up to 900~1200°C, carry out carburizing heat treatment on the vacuum sintered body, pass gas in pulse mode; heat up to 1275~1325°C , carry out Co phase migration treatment; raise the temperature to 1380~1450°C, feed Ar gas, and keep the pressure at 10~20 mbar; pressure sintering; rapidly cool to 1270°C; alloy. The cobalt content in the gradient cemented carbide of the present invention is in a gradient distribution, the cobalt content on the surface is low, there is no infiltration of C phase, the hardness is high, the cobalt content in the core is high, the η phase is not contained, the toughness is high, and the overall performance is good.

A tube welding rod resistant to low stress abrasion comprises a welded tube and a filler filling the welded tube. Components of the filler comprise macrocrystalline tungsten carbide particles, cast tungsten carbide particles and / or spherical cast tungsten carbide particles undergone surface carburization treatment, mechanically ground cast tungsten carbide particles, alloy powder, and an organic binder. The weight percentages of the components are: the macrocrystalline tungsten carbide particles being 10-50%, the cast tungsten carbide particles and / or spherical cast tungsten carbide particles undergone surface carburization treatment being 43-85%, the mechanically ground cast tungsten carbide particles being 0-20%, the alloy powder being 2-6%, and the organic binder being 0.2-1%. The welding rod improves the abrasion resistance performance of the hard-faced layer in the low stress working condition, and is particularly suitable for surface hardening of cone rolling bits and diamond bits.

Provided is a method for producing a modified conjugated diene rubber, which is provided with a step wherein monomers including at least a conjugated diene compound are polymerized using, as a polymerization initiator, an alkali metallized aromatic compound that has three or more carbon atoms directly bonded to an alkali metal atom and an aromatic ring in each molecule, and then an active terminal of the thus-obtained polymer is reacted with a compound represented by general formula (I). (In general formula (I), one of R1 and R10-R18 represents an atom or a reactive group that is reactive with an active terminal of the polymer or a hydrocarbon group that contains the atom or a reactive group; each of the rest of R1 and R10-R18 and R2-R9 independently represents a hydrogen atom, an alkyl group or an aryl group; and each of j, k, m and n represents an integer of 0-100.)

The invention discloses a method for preparing a compact ultrafine-grain boron carbide ceramic material with a reduced sintering temperature. The method comprises the following steps: selecting coarse boron carbide powder with an average particle size of less than 20 [mu]m and carrying out ball milling and settlement so as to obtain ultrafine boron carbide powder with a particle size of less than 1 [mu]m; mixing the ultrafine boron carbide powder with MnNiCoCrFeX high-entropy alloy powder and carrying out ball milling so as to obtain B4C-MnNiCoCrFeX mixed powder; and subjecting the mixed powder to pressure sintering so as to obtain the compact ultrafine-grain boron carbide ceramic material with a reduced sintering temperature. According to the invention, the MnNiCoCrFeX high-entropy alloy powder is added into a boron carbide matrix, so a liquid phase is formed during high-temperature sintering and can fill in pores, and thus, the sintering densification temperature of the boron carbide ceramic material is effectively reduced, and energy consumption is decreased; and a boron carbide product with a density of greater than 99% is obtained after a temperature of 1900 DEG C is maintained for 5 min, and compared with the prior art, sintering temperature is reduced by 200 DEG C and heat preservation time is substantially shortened.