86results about How to "Improve wear resistance" patented technology

The invention discloses a high-toughness wear-resistant polyformaldehyde composition and a preparation method thereof, and belongs to the field of engineering plastic plasticizing and functional modification technology and preparation. The polyformaldehyde composition comprises the following components in percentage by weight: 48.0 to 84.4 percent of polyformaldehyde, 10.0 to 30.0 percent of polyoxyethylene, 5.0 to 20.0 percent of polytetrafluoroethylene fiber, 0.25 to 0.5 percent of antioxidant 1010, 0.25 to 0.5 percent of antioxidant 168 and 0.1 to 1.0 percent of formaldehyde absorbent. The preparation method comprises the following steps of: drying the polyformaldehyde, the polytetrafluoroethylene fiber and polyethylene oxide; placing each component in a stirrer for full mixing according to the proportion; melt-blending and extruding the mixture through a twin screw extrusion pelletizer; and cooling and pelletizing the mixture. The prepared polyformaldehyde composition is applied to manufacturing of the mechanical components with high requirements on impact resistance and wear resistance.

The invention discloses an SMC molding compound with high wear resistance. The SMC molding compound comprises the following components in parts by weight: 100-200 parts of polyurethane resin, 0.5-3 parts of an emulsifier, 1-13 parts of a wear-resistant agent, 0.8-2 parts of an antioxidant, 0.8-3 parts of a corrosion inhibitor, 80-120 parts of unsaturated polyester, 30-120 parts of glass fibers, 50-90 parts of glass fibers, 0.8-3.5 parts of a thickening agent, 0.1-3 parts of a compatilizer, 1-12 parts of a shrinking agent, 5-15 parts of titanium dioxide and 3-15 parts of a flame retardant. A preparation method for the SMC molding compound comprises the following steps: heating, stirring and mixing desired parts by weight of the above raw materials to obtain mixed materials and subjecting the mixed materials to compression molding to obtain wear-resistant plastic. According to the invention, a glass fiber board prepared from the glass fibers is arranged in the plastic, and the plastic contains wear-resistant components such as carbon fibers and the wear-resistant agent, so the wear resistance of the plastic can be effectively improved; and wear-resistant powder is pressed on the surface of the plastic, so the wear resistance of the surface of the plastic is further improved.

The invention discloses a novel anti-wear device of a port loading and unloading hopper and the hopper. The problem that a port bulk cargo loading and unloading hopper is prone to being worn due to material impact is solved, most of sliding friction between materials and the hopper can be converted into rolling friction, friction resistance can be greatly reduced, rapid flowing of the materials can be achieved, and meanwhile, impact wear of the materials to the wall of the hopper can be achieved; according to the technical scheme, the device comprises a plurality of anti-wear assemblies which are arranged along the inner side wall of the hopper and are sequentially arranged from top to bottom along the side wall of the hopper, and each anti-wear assembly comprises a support fixed to the side wall of the hopper; the supports are connected with anti-wear rollers through rotating shafts, and the materials are in rolling fit with the anti-wear rollers along the hopper in the sliding process.

The invention discloses a special cementing material for preparing wear-resistant ultra-high performance concrete. The special cementing material is prepared by uniformly dry-mixing the following raw materials in parts by weight: 65-75 parts of Portland cement clinker powder, 20-30 parts of high-iron and high-belite sulphoaluminate cement clinker powder, and 5-10 parts of gypsum powder. The proportioning parameters of the high-iron and high-belite sulphoaluminate cement clinker comprises the alkalinity coefficient Cm value is 1.2-1.4, the fCaO is 3-5%, and the fSO3 is 2-3%; and the mineral comprises 45-50% of C2S mineral, 20-26% of mineral, 20-25% of C4AF mineral, 3-5% of CaSO4 mineral, and 2-4% of fCaO mineral. The wear resistance of the special cementing material is remarkably improved by 40% compared with that of Portland cement, and reliable technical support is provided for improving the wear resistance of the wear-resistant UHPC material.

The invention provides a construction method for a carborundum wear-resisting floor of a large spinning workshop and belongs to the field of building construction. The construction method is characteristics in that a concrete structural layer and a carborundum wear-resisting surface layer are formed at a time, construction of the carborundum wear-resisting surface layer is conducted between concrete initial set and final set, curing is conducted through a curding agent after concrete final set, and the firm and wear-resisting ground with the thickness being 3 mm is formed on the surface of the concrete structural layer. According to the construction method for the carborundum wear-resisting floor of the large spinning workshop, quality common problems, such as hollowing, peeling and cracking, of the workshop floor can be effectively avoided, the ground wear resistance is improved, and the ground service life is prolonged.

In a tire 12, a tread 14 includes a tread main body 44 and edge portions 46. A wear resistance index of each edge portion 46 obtained according to JIS K6264-2 is higher than that of the tread main body 44. An outer surface S of the tire 12 includes a tread surface ST, a pair of shoulder surfaces SH connected to the tread surface ST, and a pair of side surfaces SW connected to the shoulder surfaces SH. Each shoulder surface SH includes an outer surface formed by the edge portion 46, and a contour of each shoulder surface SH is represented by a circular arc having a center at an inner side.

The invention discloses a wear-resistant stainless steel wire. The wear-resistant stainless steel wire is at a diameter of 3.9-5.1mm and comprises the following components in a percent by mass: 0.01-0.03% of carbon, 13-17% of chromium, 7-8% of nickel, 0.1-0.12% of copper, 0.4-0.5% of phosphorus and the balance of iron. The steel wire provided by the invention is resistant to high temperatures, high in wear resistance and long in service life and radically solves the problems that the steel wire is easily worn and easily becomes rusty. The categories of alloy materials are increased, and the ratio of all material elements is regulated. As the nickel, the chromium, the copper, the phosphorous and the like are added into the materials for preparing the steel wire, a stainless steel finished product contains reasonable ratios of elements, including the nickel, the chromium, the copper and the phosphorous, the wear resistance and the corrosion resistance of the stainless steel material are greatly improved, and the service life is prolonged.

A ceramic for decorative parts is provided which has excellent wearing resistance and can retain over long a gold color tone capable of giving a high-grade feeling, a feeling of aesthetic satisfaction, and spiritual comfortableness. Also provided is a decorative part comprising the ceramic. The ceramic for a decorative part is characterized by comprising 50 mass % or more titanium nitride, 6 mass % or more and 30 mass % or less unstabilized zirconia containing substantially no stabilizer, and nickel, the unstabilized zirconia having a crystal grain size smaller than the crystal grain size of the titanium nitride.

The invention provides an implementation method of a wear-resistant and skid-resistant tunnel cement concrete pavement, and belongs to the technical field of buildings. According to the method, through the cement concrete formula and the special arc-shaped groove design and adjustment of the maintenance environment index, the wear resistance of the cement concrete pavement can be improved, the pavement friction force can be improved, the anti-sliding durability and the driving stability of the cement pavement under the special tunnel environment condition can be effectively improved, and the tunnel driving safety is guaranteed; and the method has good social and economic benefits.

The invention relates to the technical field of composite materials, and provides a black phosphorus modified polyimide composite material, a preparation method thereof, and an application of the black phosphorus modified polyimide composite material as a friction material. The black phosphorus modified polyimide composite material comprises, by mass, 50-80 parts of polyimide, 5-15 parts of polytetrafluoroethylene, 5-20 parts of carbon fibers, 5-15 parts of graphite, 5-10 parts of polyphenyl ester and 0.5-2 parts of black phosphorus. Results of embodiments in the invention show that the hardness (Shore D) of the black phosphorus modified polyimide composite material obtained in the invention is equal to or more than 85, the wear extent is equal to or less than 0.001 g/h, the elastic modulus is equal to or more than 9.5 GPa, the glass transition temperature is equal to or more than 260 DEG C, and the composite material has excellent performances.