495results about How to "Wear resistance" patented technology

PCT No. PCT/JP98/00532 Sec. 371 Date Mar. 9, 1999 Sec. 102(e) Date Mar. 9, 1999 PCT Filed Feb. 9, 1998 PCT Pub. No. WO98/35784 PCT Pub. Date Aug. 20, 1998The present invention provides a wire saw for use in cutting works of electronics materials or optical materials and a method for manufacturing the same, said wire saw having the following characteristic features. Namely, onto a high-strength core wire 2, abrasive grains 3 having a grain size not smaller than two-thirds the thickness of a layer of resin bond 4 on said core wire 2 but not exceeding a half the diameter of said core wire are fixed with said resin bond, said resin bond containing a filler having a grain size smaller than two-thirds the thickness of said resin bond layer. The thus structured and arranged wire saw has an improved efficiency and precision in cutting. The wire saw can be manufactured readily by using an enamelling oven.

Free standing articles or articles at least partially coated with substantially porosity free, fine-grained and/or amorphous Co-bearing metallic materials optionally containing solid particulates dispersed therein, are disclosed. The electrodeposited metallic layers and/or patches comprising Co provide, enhance or restore strength, wear and/or lubricity of substrates without reducing the fatigue performance compared to either uncoated or equivalent thickness chromium coated substrate. The fine-grained and/or amorphous metallic coatings comprising Co are particularly suited for articles exposed to thermal cycling, fatigue and other stresses and/or in applications requiring anti-microbial properties.

The present invention aims to provide a photoconductor having improved wear resistance, and which has reduced foreign matter attached on the photoconductor surface.

The electrophotographic photoconductor of the present invention is formed by sequentially disposing a photoconductive layer comprising at least one layer and a protective layer on an electroconductive support, and the protective layer comprises an acrylic resin and/or a methacrylic resin and a resin composition comprising an acryl-modified polyorganosiloxane compound which is dispersed in or compatible with the acrylic resin and/or the methacrylic resin.

A prosthetic medical device exhibiting improved wear resistance is fabricated by irradiating at least one polyolefinic material in the presence of an inert atmosphere to yield a cross-linked irradiated polyolefinic material; blending at least one non-irradiated polyolefinic material with the at least one irradiated polyolefinic material, and forming the prosthetic medical device from the blended material. Selectively cross-linked polymeric compositions may be created by blending a specific amount of cross-linked resins with a specific amount of uncross-linked resins then cured into a polymeric matrix whereby the desired degree or percentage of overall cross-linking is obtained. The polymeric material may then be formed directly into a finished article by injection molding the polymeric material.

A system for implementing multiple-physical state industry dangerous waste incineration and disposal relates to the garbage disposal technology of the environment protection technical field. Two seal doors are arranged at a bulk waste material feed port or a barreled waste material feed port on a rotary kiln feed hopper. The rotary kiln and a second combustion chamber frame all adopt carbon steel materials, refractory materials a working layer of the rotary kiln select chromium fused alumina abrasion-proof plastic materials, refractory materials of the second combustion chamber select abrasion-proof pouring materials. The rotary kiln is provided with a primary fan and a combustion-supporting combustor 1 which are connected with the rotary kiln, the second combustion chamber is provided with a second fan and a combustion-supporting combustor 2 which are connected with the second combustion chamber, a stuffing absorbing tower and a flue gas heater are connected in turn between the bag-type dust remover and a draught fan. Compared to the prior art, the invention can effectively destroy large quantities of toxic and noxious high molecule organic matters, can effectively avoid phenomenon of the collapse fall of the rotary kiln incineration furnace wall and the burning ring of the steel body, and can avoid high-temperature corrosion and low-temperature corrosion, the invention has advantages of good operation economical performance, fluent slag system and low pollution discharge index.

A production method for sintered machine components, includes preparing an Fe alloy powder A, an Fe alloy powder B, an Fe—P powder, and a graphite powder. The Fe alloy powder A consists of, by mass %, 25 to 45% of Cr, 1.0 to 3.0% of Mo, 1.0 to 3.0% of Si, 0.5 to 1.5% of C, and the balance of Fe and inevitable impurities. The Fe alloy powder B consists of, by mass 15 to 35% of Cr, 15 to 30% of Ni, and the balance of Fe and inevitable impurities, and the Fe—P powder consists of 10 to 30 mass % of P and the balance of Fe and inevitable impurities. The production method further includes mixing 40 to 60 mass % of the Fe alloy powder B, 1.0 to 5.0 mass % of the Fe—P powder, and 0.5 to 3.5 mass % of the graphite powder with the Fe alloy powder A into a mixed powder. The production method further includes compacting the mixed powder into a green compact and sintering the green compact.

This invention relates to a method for surface modification of steel material or steel component by combined treatment of gaseous nitrocarburization and post oxidation. The method comprises: (1) performing vacuum washing of the steel material, and pre-oxidizing at 400 deg.C; (2) placing the steel material in a box-type nitrocarburization heat treatment furnace, introducing mixed gases of NH3, N2 and CO2, reacting at 550-570 deg.C, and cooling with oil; (3) polishing, placing in an oxidation furnace, performing post oxidation with high-temperature steam for 1 h, and polishing to obtain steel material with high wear resistance and high corrosion resistance.

Provided is a pneumatic tire having improved driving stability and wear resistance on dry road surfaces as well as an improved running performance on snow. The present invention provides a pneumatic tire designed to be mounted on a vehicle so that a designated side of the tire should face to the outside of the vehicle. The pneumatic tire includes a tread portion provided with: a first main groove extending in a tire circumferential direction; a second main groove extending in the tire circumferential direction in a shoulder region closer to the center of the vehicle than the first main groove; a third main groove extending in the tire circumferential direction in a shoulder region farther from the center of the vehicle than the first main groove; and a plurality of lug grooves each extending from one shoulder side to the other shoulder side. Moreover, in the pneumatic tire, a width of a first land section defined between the first and second main grooves is set greater than a width of a second land section defined between the first and third main grooves, a plurality of inclined grooves are provided in the first land section, each inclined groove communicating with at least three of the lug grooves while being inclined to the tire circumferential direction, and one end of each inclined groove is opened to one of the lug grooves while the other end thereof is terminated within a block.

The present invention discloses vehicle composite friction material with potassium titanate crystal whisker and the preparation method. In terms of weight percentage, the composite friction material includes the following components: 10 to 50 percent of cashew oil modified phenol formaldehyde resin, 3 to 8 percent of NBR, 10 to 20 percent of crystal potassium titanate, 3 to 8 percent of squamose potassium titanate, 3 to 8 percent of vermiculite, 1 to 3 percent of aramid fiber, 3 to 8 percent of meerschaum fiber, etc. In preparation, the composite friction material is made into prepare material according to the proportion, the prepare material is evenly mixed and poured into a die for pressing and molding, and then the pressed finished product is taken out; the pressed finished product is put into a constant-temperature box and processed for 8 to 24 hours under the temperature of 145 to 165 DEG C, thus finally obtaining the vehicle composite friction material with potassium titanate crystal whisker. The prepared material has stable chemical performance and no toxin and harm; the potassium titanate powder produced by the friction of crystal whisker in braking process will rapidly settle down on the ground, thus preventing the body hurt and air pollution.

The invention discloses a combined type mechanically crushing machine hammer and a manufacturing method thereof. The hammer comprises a head part (3) and a handle part (1) which are mechanically combined for forming the hammer, the head part (3) is formed by high-chromium cast iron lost foam casting, the handle part (1) is formed through high-manganese steel lost foam casting, an installing hole (5) connected with a circular disc of a crushing machine is arranged above the handle part (1), a rabbet (4) is arranged under the handle part (1), the head part (3) is provided with a mortice (8) matched with the rabbet (4) of the handle part, and the handle part (1) and the head part (3) are connected through the mutually matched rabbet (4) and the mortice (8) for forming the integral hammer. The hammer of the invention has the advantages of simple manufacture, wear resistance, good toughness, fast replacement of the head part, repeated use of the handle part, production efficiency improvement and metal material saving. The invention is particularly suitable for manufacturing reversible hammer type crushing machine hammers.

A tool has a main part of hard metal, cermet, ceramic, steel, high-speed steel, and a single or multilayer wear protection coating applied onto the main part by CVD and which has a thickness from 3 μm to 25 μm. The wear protection coating has at least one Ti_1-xAl_xC_yN_z layer with stoichiometric coefficients 0.70≦x<1.0≦y<0.25 and 0.75≦z<1.15 and a thickness from 1.5 μm to 17 μm. The T_1-xAl_xC_yN_z layer has a lamellar structure with lamellae with thickness of no more than 150 nm, preferably no more than 100 nm, particularly preferably no more than 50 nm. Lamellae are made of periodically alternating regions of the Ti_1-xAl_xC_yN_z layer with alternatingly different stoichiometric proportions of Ti and Al, having the same crystal structure (crystallographic phase), and the Ti_1-xAl_xC_yN_z layer has at least 90% vol. % of face centered cubic (fcc) crystal structure.

The present invention provides novel filled silicone compositions comprising a nano-particulate metal oxide filler selected from nano-particulate monoclinic alpha-phase bismuth oxide, nano-particulate erbium oxide, and mixtures thereof. The new composite compositions exhibit a combination of outstanding performance characteristics in both the cured and uncured states. Thus, the uncured formulations are typically free flowing liquids which are self-leveling, which de-gas readily under vacuum, are readily colorable through the addition of pigments, and which cure at temperatures of about 60° C. The cured compositions possess outstanding acoustic characteristics which make them ideally suited for use in applications such as acoustic lenses for medical imaging and therapy. For example, the acoustic impedance of compositions provided by the present invention is closely matched to the acoustic impedance of human tissue. This may result in an enhancement of ultrasound transmission efficiency between the lens of an ultrasound probe comprising such a composition and the patient.

The invention relates to a manufacturing method of a shield machine scraper. The manufacturing method comprises the following steps of: selecting the required feeding amount of a manufactured steel ingot according to the drawing size of a scraper body, carrying out die forging on the steel ingot by using a forging die to manufacture a scraper body blank, putting the scraper body blank in a thermal treatment furnace to carry out annealing treatment, and then carrying out mechanical rough machining on the scraper body blank, then putting the scraper body blank subjected to rough machining into the thermal treatment furnace again to carry out intermediate thermal treatment, so that the hardness of the scraper body blank is HRC 42-45; and then respectively overlying and coating a wear resistant layer on two sides of the scraper body, carrying out mechanical precise machining on one side of the scraper body on a numerically-controlled machine tool to form an alloy blade step and then machining at least one U-shaped groove in the periphery of the scraper body, brazing an auxiliary blade in the U-shaped groove, and sequentially brazing an end main blade and a main blade on the step at the outer side of the scraper body.

According to a first embodiment, the invention relates to a separating device for removing sand and rock particles in the extraction of liquids or gases from wells drilled in rock, comprising a plurality of annular discs of a brittle-hard material stacked one on top of the other and axially braced by means of a supporting structure, the discs having on their upper side at least three spacers uniformly distributed over the circular circumference of the discs, the discs being stacked one on top of the other in such a way that the spacers respectively lie one over the other, and that a separating gap with a height of 0.05-1 mm, preferably 0.2-0.5 mm, is present in each case between the individual discs.

According to a second embodiment, the invention relates to a separating device for removing sand and rock particles in the extraction of liquids or gases from wells drilled in rock, comprising a plurality of bush-shaped elements of a brittle-hard material stacked one on top of the other and axially braced by means of a supporting structure, slits with a slit width of 0.05-1 mm, preferably 0.2-0.5 mm, being formed in the bush-shaped elements.

The invention provides a preparation method of anti-cutting yarn. Two high-strength polyester filaments or ordinary polyester filaments are plyed and twisted, and then twisted and coated with ordinary glass fiber filaments or basalt fibers to form a core yarn. , On the basis of the above core fiber, the outer layer is covered with high-strength nylon or high-strength polyester filament or high-strength nylon and spandex as the outsourcing fiber to make a cut-resistant yarn. The core yarn provides the skeleton of the cut-resistant yarn, the spandex provides comfortable elasticity, and the outer covering yarn provides toughness resistant to direct cutting, which can be used in textiles including fabrics, gloves, sheaths, aprons and other fields. The present invention adopts conventional fiber varieties as the core yarn, rationally configures the twist of the yarn and the distribution and proportion of fibers, so that the yarn or textiles can reach different anti-cutting levels and the highest anti-cutting level, greatly reducing the production cost, and the cutting resistance is stable. And the yarn feels comfortable.

A peelable stenciling ink for imprinting indicia such as letters, numbers and symbols on a surface of an article such as a sport ball made of leather or a synthetic polymer, e.g., a thermoplastic material, consists of a solvent, a dye dispersed in the solvent, and a film-forming polymer soluble in the dye-solvent solution to form a thick paste and hardenable into a solid, flexible film upon evaporation of the solvent from a thin layer of ink applied to an article surface. A method of using the ink comprises the steps of temporarily adhering a stencil sheet in fluid-tight contact to an article surface by a pressure-sensitive adhesive layer, smearing a layer of the ink on the obverse surface area of the stencil sheet through indicia-shaped openings through the sheet onto the article surface, allowing sufficient time for dye in the ink to penetrate the article surface, and for the solvent to evaporate and cause the film-forming substance to harden into a solid film peelable from the article surface, and peeling the stencil sheet and solid film together from the article surface, thereby leaving indicia markings imprinted on and dye-penetrated beneath the article surface, thus making the markings resistant to obliteration by scuffing or abrasion.

The present invention discloses a composite fishing line manufactured by entangling eight bundles of fibers selected from two different types of fibers, one being a high molecular-weight polyethylene fiber and the other being a high molecular-weight expanded polytetrafluoroethylene (ePTFE) fiber, such that the composite fishing line has the properties of both high molecular-weight polytetrafluoroethylene (PTFE) fibers and polyamide fibers to improve the strength, wear-resistance, cross-sectional roundness, and water resistance of the high-performance fishing line and achieve the effect of reducing the diameter of the fishing line.

A bush is provided at its sliding surface with oil-supply groove portions. An area ratio of the oil-supply groove portions to the sliding surface of the journal shaft is set to 30 to 90%. A length L₁ between the oil-supply groove portions in a circumferential direction and an inner diameter D of the bearing satisfy L₁<πD/36. Even in a bearing device in which the journal shaft and the bush mutually rotate in a predetermined angle range or in which the journal shaft and the bush relatively and continuously rotate, the present invention can effectively be used while maintaining the existing sizes of the journal shaft and the bush, and it is possible to prevent partial break of oil film or shortage of oil film.