4133results about How to "Wear-resistant" patented technology

The invention discloses laser-cladding high-entropy alloy powder. The laser-cladding high-entropy alloy powder comprises the following elements in percentage by weight: 10%-15% of Fe, 14%-17% of Cr, 22%-25% of Ni, 22%-24% of Co, 22%-24% of Mn, 0%-4% of Si and 0%-4% of B. The invention further discloses a scheme of adding another element Al based on the gradients of the scheme, and a method for preparing a high-entropy alloy coating by using the laser-cladding high-entropy alloy powder. According to the technical scheme, after laser cladding, good coating quality is realized; a phase structure of the coating retains peculiar solid solution structure of high-entropy alloy, and the atomic percent of each main metal element in the cladding coating satisfies nominal category of the high-entropy alloy; the coating has a plurality of excellent performances of high rigidity, high temperature resistance, wear resistance, corrosion resistance and the like; the technical repeatability and operability are both greatly improved, so that the high-entropy alloy is popularized and applied in surface modification of laser materials.

The invention discloses an explosion-proof energy-absorbing polyurea elastic coating and a preparation method thereof. The explosion-proof energy-absorbing polyurea elastic coating comprises an ingredient A and an ingredient B. The ingredient A comprises, by weight, 40-80 parts of isocyanate, 15-35 parts of polyether polyol, 0-10 parts of a chain extender and 5-15 parts of a diluent. The ingredient B comprises, by weight, 40-80 parts of amine-terminated polyether, 20-40 parts of an amine chain extender, 0-10 parts of a filler and 0-10 parts of an auxiliary agent. The invention discloses the preparation method of the explosion-proof energy-absorbing polyurea elastic coating. A coating layer obtained by spray-coating of the explosion-proof energy-absorbing polyurea elastic coating has ultrahigh strength and good flexibility, can effectively resist explosive shock wave and fragments and is especially suitable for being used as a weapon equipment composite armour and a protective coating of military facility.

The invention relates to a preparation method of a functional textile, and belongs to the field of textile surface grafting modification. The method for preparing a super-hydrophobic textile from a thiol-ene click chemistry-modified fiber is characterized by comprising the steps that alkali liquor steaming treatment is performed on a polyester fiber, then mercaptosilane is fixed to the surface of the polyester fiber, finally a methacrylate monomer is grafted to the surface of the polyester through a thiol-ene click chemistry reaction to reduce the surface tension of the fiber, and then the super-hydrophobic polyester textile is obtained. The contact angle between the polyester textile prepared through the method and water drops is larger than 150 degrees, and the polyester textile is stable to acid, alkali, salt and solvent and capable of resisting friction and washing and has the very good hydrophobic stability.

A windscreen wiper device comprising at least one yoke which is attached to a carrier in such a manner as to be capable of pivotating movement about a first pivot axis, wherein both said carrier and said yoke have a substantially U-shaped cross-section at the location of their interconnection, said windscreen wiper device further comprising a oscillating arm pivotally connected to said carrier about a second pivot axis near one end, wherein said carrier is provided, at the location of said second pivot axis, with a transverse shaft, with the special feature that said oscillating arm and said carrier are interconnected with the interposition of a joint part, wherein said joint part comprises at least one resilient tongue engaging in a correspondingly shaped hole provided in said oscillating arm.

The invention discloses a multi-component high-performance sizing agent. The sizing agent is prepared from various raw materials by a mixing reaction, wherein the raw materials comprise corn starch, phosphate, tween, persulfate, and at least one of phosphorus oxychloride and epoxy chloropropane. The sizing agent has the characteristics that the adhesion force is high, the film-forming ability is high, a serous film is coriaceous, the elasticity is high, the bending resistance (fatigue resistance) is improved by 3 to 4 times compared with a common modified starch sizing agent, and the abrasion resistance and the ageing resistance are high. The serous liquid is not frozen, caked or layered at normal temperature, and has high liquidity and stable viscosity. The sizing agent has no polyvinyl alcohol; when the sizing agent is sized on spinning cotton yarns; for the variety with general tightness, the polyvinyl alcohol does not need to be used for less than 50 yarns; or no or less polyvinyl alcohol is used for sizing on polyester cotton or over 50 cotton yarns; the yarns are easy to desize; the serous liquid waste water is easy to treat; the environment pollution is low; and the production process has zero pollution emissions.

The invention discloses a nanocomposite road marking coating material. The nanocomposite road marking coating material comprises the following ingredients in parts by weight: 20-30 parts of glass powder, 6-10 parts of aluminum oxide powder, 50-80 parts of filler, 30-40 parts of epoxy resin, 15-20 parts of aqueous epoxy modified acrylate, 15-20 parts of glass micro-beads, 10-20 parts of chitin, 15-20 parts of chitosan, 20-40 parts of nano titanium white, 15-20 parts of nano zinc oxide, 10-15 parts of nano-silica, 2-4 parts of 25wt% ammonia water, 30-40 parts of acrylic emulsion and 15-20 parts of nano rare-earth self-luminous material. The invention further discloses a preparation method of the nano coating material. The nanocomposite road marking coating material disclosed by the invention is high in drying speed and long in service life, is wear-resistant and anti-fouling and has a bacterium resisting effect, and nano-materials or nano-structured ingredients are introduced into an organic coating material, so that organic and inorganic matched compositing or hybridization is realized. The advantages of organic polymers and inorganic-structured ingredients are integrated, so that the properties of the coating material are obviously improved.

The invention discloses a formula of a high-strength polyester composite well cover, which comprises the following raw materials in parts by weight: 21-22 parts of unsaturated polyester resin, 8-9 parts of low shrink additive, 40-50 parts of heavy calcium carbonate, 1-1.5 parts of zinc stearate, 0.2-0.8 part of active magnesia, 0.12-0.28 part of curing agent, 0.2-0.8 part of carbon black, 10-20 parts of alkali-free glass fiber roving and 10-20 parts of glass fiber woven roving. A production method of the well cover of the invention comprises the following steps of: firstly preparing resin paste, preparing sheets by utilizing the resin paste, and then, forming the sheets by die pressing. The well cover of the invention has the characteristics of strong carrying capacity, shock resistance, ageing resistance, wear resistance, corrosion resistance, novel and attractive appearance, simple structure, environmental protection and the like, and basically solves the problem of well cover pilfering.

The invention relates to a flame retardant and antistatic steel mesh skeleton polyethylene composite pipe for mining and a manufacturing method thereof. The method is characterized in that the polyethylene composite pipe is obtained by the manufacturing processes of subjecting dedicated composite modified polyethylene plastics to flame retarding and antistatic treatment in two steps, compositing the treated plastics with a high-strength steel mesh skeleton and a hot melt adhesive bond for several times, and heating and vacuuming the composite for several times. At least two layers of high-strength steel wires are wound to be reticulate in an oblique crossing manner, arranged between the outer wall of the inner layer and the inner wall of the outer layer as a skeleton, and tightly combined with the pipe body of the inner and outer layers into an integral whole by means of a hot melt adhesive, thus forming a composite pipe for underground coal mines, which is flame-retardant and antistatic and has relatively high mechanical strength and pressure resistance, long service life and other excellent properties. As the pipes are connected through welding by electric melting pipe fittings, the flame retardant and antistatic steel mesh skeleton polyethylene composite pipe for mining has high overall properties and convenience in laying, is applicable to the coal mine industry with strict property requirements in all aspects, and is also applicable to water supply and drainage, fire protection and gas delivery in the municipality and construction.

Disclosed are technical fibers and yarns made with partially aromatic polyamides and non-halogenated flame retardant additives. Fabrics made from such fibers and yarns demonstrate superior flame retardancy over traditional flame retardant nylon 6,6 fabrics. Further, the disclosed fibers and yarns, when blended with other flame retardant fibers, do not demonstrate the dangerous “scaffolding effect” common with flame retardant nylon 6,6 blended fabrics.

The invention discloses a zirconia ceramic cylinder liner material and a preparation method thereof, and the material comprises the following components: 60-80 wt% of ZrO2, 20-30 wt% of Al2O3, 3.2-4.3 wt% of Y2O3, 3-4.2 wt% of TiO2, and 1.5-2.1 wt% of La2O3. The method prepares the ZrO2 ceramic cylinder liner material by using Al(NO3)3, ZrOCl2.8H2O, Y(NO3)3, TiCl4, LaCl3 as raw materials, using C6H12N4 as a precipitant, and by a coprecipitation method. Uniform mixing of each component at molecular level is effectively realized. The disadvantage of poor uniformity of the mixing of each component in the material due to routine ball milling mixing technology is overcome; the prepared zirconia ceramic powder has the characteristics of uniform dispersion, homogeneous particle size, and good fluidity; low-temperature sintering is realized; the ZrO2 composite ceramic material green body prepared by the method has bending strength of 980-1200 MPa, fracture toughness of 8.3-10 MPa.m1 / 2, vickers hardness of 2 GPa-14 GPa after calcination at 1330-1380 DEG C; the process is simple, and is applicable to large-scale production.