283results about How to "Excellent friction and wear resistance" patented technology

The invention provides a ceramic composite material for a thin-strip casting side sealing plate and a preparation method thereof, relating to a ceramic composite material and a preparation method thereof and solving the problems that the traditional side sealing plate has high heat conductivity, serious abrasion, poor seal, high preparation cost and large energy consumption, can not be secondarily processed or reused. The ceramic composite material consists of zirconia, boron nitride and additives. The preparation method comprises the following steps: 1, weighing raw materials; 2, ball milling and mixing the raw materials; 3, drying to obtain uniform mixed powder; and 4, carrying out hot pressed sintering, pressureless sintering, air pressure sintering or hot isostatic pressed sintering on the mixed powder, so as to obtain the ceramic composite material for a thin-strip casting side sealing plate. The compactness of the ceramic composite material is 94%-99%, the bending strength of the ceramic composite material, tested by a three-point bending test at room temperature, is 260-420MPa, and the fracture toughness of the ceramic composite material, tested by a unilateral coped beam method, is 3-8 MPa.m<1/2>. The ceramic composite material can be widely applied to the field of side sealing plate materials.

The invention relates to hard-coated bodies with a single- or multi-layer system containing at least one Ti_1-xAl_xN hard layer and a method for production thereof. The aim of the invention is to achieve a significantly improved wear resistance and oxidation resistance for such hard-coated bodies. Said hard-coated bodies are characterised in that the bodies are coated with at least one Ti_1-xAl_xN hard layer, generated by CVD without plasma stimulation present as a single-phase layer with cubic NaCl structure with a stoichiometric coefficient x>0.75 to x=0.93 and a lattice constant a_fcc between 0.412 nm and 0.405 nm, or as a multi-phase layer, the main phase being Ti_1-xAl_xN with a cubic NaCl structure with a stoichiometric coefficient x>0.75 to x=0.93 and a lattice constant a_fcc between 0.412 nm and 0.405 nm, with Ti_1-xAl_xN with a wurtzite structure and/or as TiN_x with NaCl structure as further phase. Another feature of said hard layer is that the chlorine content is in the range of only 0.05 to 0.9 atom %. The invention further relates to a method for production of the body, characterised in that the body is coated in a reactor at temperatures from 700° C. to 900° C. by means of CVD without plasma stimulation with titanium halides, aluminium halides and reactive nitrogen compounds as precursors, mixed at elevated temperatures. Said coating can be applied to tools made from steel, hard metals, cermets and ceramics, such as drills, millers and indexable inserts.

The invention discloses a superhigh intensity wear-resistant steel and the manufacturing method, which belongs to the manufacturing field of low alloying steels, according to percentage by weight, the chemical components of the steel are that C 0.10-0.17%, Si 0.25-0.50%, Mn 1.20-1.50%, P<=0.018%, S<=0.008%, Cr 0.20-0.05%, Ni0.25-0.50%, Mo 0.10-0.40%, Als 0.02-0.06%, B<=0.005%, RE<=150g/t, and the allowance is Fe and unavoidable impurities, and the content of carbon is Ceq(%)<=0.60, Ceq(5)=C+Mn/6+(Mo+Cr+V)/5+(Ni+Cu)/15. The specific method for producing the steel comprises the following steps: smelting ultra-pure steel, desulfurizing molten iron, compounding and converting the top and the bottom of a converter, doing vacuum treatment, feeding rare earth (RE) silk through a crystallizer, casting into bar plates, heating the bar plates, roughing, planishing, air cooling or feeding middle pressure, water cooling, quenching and tempering steel plates. V does not contain in the chemical components of the steel, inner stress of steel is low, steel welding property is improved, and steel has excellent abrasion resistance and ultra-high strength and toughness properties, which is beneficial for popularization and application.

The invention relates to plastic forming technology and powder metallurgy technology, in particular to a tungsten carbide particle-enhanced iron-based powder metallurgy material and a preparation method thereof. According to a specific formula, the iron-based powder metallurgy material comprises the following components in percentage by mass: 85.0 to 90.0 percent of matrix material and 10.0 to 15.0 percent of enhanced phase tungsten carbide, wherein the matrix material comprises the following components in percentage by mass: 1.4 to 2.0 percent of copper, 1.7 to 2.0 percent of nickel, 0.9 to 1.2 percent of molybdenum, 0.7 to 1.6 percent of carbon and the balance of iron. In the invention, quick spark plasma sintering is adopted; and the obtained material has the characteristics of nearly full densification, high hardness, high indoor temperature bending strength, high high-temperature mechanical property and the like, can be used as a wear-resistant material, a tool material and the like, and can reduce the dependency of Chinese tool material production on import of precious metals such as vanadium, chromium and the like. The material has high cost performance and a good industrial production prospect.

Belonging to the technical field of alloy steel preparation processes, the invention relates to an ultrahigh thermal conductivity wear-resistant hot stamping die steel and a manufacturing method thereof. Current hot stamping die steel on the market is mainly various improved H13, H11 and other high alloy hot work die steel. The steel provided by the invention comprises the following components by mass percent: 0.33-0.40% of C; less than 0.30% of Si; less than 0.30% of Mn; 1.0-2.0% of W; 4.0-5.0% of Mo; less than 0.30% of Cr; 0.10-0.20% of V; and the balance Fe and inevitable impurities. And in the impurity elements, S is smaller than or equal to 0.01%; P is smaller than or equal to 0.01%; and O is smaller than or equal to 30ppm. The steel is characterized in that: simple C, Mo and W are adopted as the main elements to coordinate the ratio of carbides; low Mn, low Cr and low Si content are maintained; after electric furnace smelting, electroslag remelting, annealing, high temperature homogenization, forging and annealing, the material has good machining properties; and after heat treatment, the material has excellent impact toughness, tempering stability and thermal fatigue performance. With ultrahigh thermal conductivity, the steel can be more suitable for hot stamping.

The invention discloses a bearing retainer material and a preparation method thereof. The material is prepared from the following raw materials in percentage by weight: 2 to 5 percent of molybdenium disulfide, 8 to 12 percent of polyimide, 9 to 15 percent of polybenzoate, the balance of polytetrafluoroethylene. The preparation method comprises the following steps of: weighting the raw materials; mixing the raw materials; grinding the mixture; loading the mixture into a mould; pressurizing to prepare a blank; sintering the blank; and processing the blank into a finished product. The retainer material has the advantages of high temperature resistance, low temperature resistance, dimension stability, small erosion to metal and rubbed surfaces and good abrasion resistance. A retainer made of the bearing retainer material can be used under harsh conditions of no magnetism, ambient temperature changed between -19 and +55 DEG C, and rotation speed up to 7,200r/min so as to improve the performance of bearings.

The invention relates to a method for preparing carbonitride modified film on the surface of medical titanium alloy implant material, which has good biocompatibility and can be applied for doposition preparation method of biological medical carbonitride (CNx) modified film implanted on the surface of titanium alloy implant body used in surgery. The method utilizes a technique of DC magnetron sputtering to firstly deposit a Ti transition layer on the surfaces of medical titanium alloy such as NiTi alloy, Ti6Al4V, Ti24Nb4Zr7.9Sn and the like, and then the carbonitride (CNx) modified film with good biocompatibility is sputtered on the surfaces of medical titanium alloy. The technical proposal realizes the good combination of the carbonitride (CNx) film and medical implant materials such as titanium alloy and the like, and has good biological and medical property, thus being favorable for improving the reliability and safety of the medical titanium alloy implant materials such as the NiTi alloy, the Ti6Al4V, the Ti24Nb4Zr7.9Sn and the like in surgery implantation treatment.

The invention relates to a preparation and carbonization method of a needle-punched pre-oxidative fiber prefabricated part, comprising two steps: step I: the preparation of the prefabricated part; long pre-oxidative fibers are chosen to be paved into a laid fabric, the pre-oxidative fibers are cut short to be paved into a mesh tire; step II: the carbonization of the prefabricated part: the prefabricated part is fixed by a graphite plate 2 and is filled in a carbide furnace, gas valves 8 and 13 are closed, a gas valve 11 is opened, a vacuum pump is started to vacuumize to be below 0.1MPa, and then the valve 11 is closed, the valve 8 is opened, and then high-purity nitrogen is blown in to lead air pressure to be 0.1MPa, temperature programming carbonization is carried out at a certain speed, after the temperature reaches to set temperature, the room temperature is cooled naturally under the protection of nitrogen at normal pressure. The method breaks through the limitation that the carbon matrix composite prefabricated part is prepared domestically by carbon fibers mainly, simplifies the preparation procedures and reduces the preparation cost, and the prepared prefabricated part can well meet the requirements of preparing the high-performance carbon matrix composite material.

The invention relates to copper-based powder dispersion ceramic as well as a preparation method and application thereof, and relates to the field of ceramic materials. The copper-based powder dispersion ceramic is prepared from an anti-abrasion constituent element as one of the raw materials, wherein the anti-abrasion constituent element comprises the following components by mass percent of all the raw materials: 1-5 percent of diamond powder and 1-5 percent of titanium diboride powder. The copper-based powder dispersion ceramic is high in impact pressure resistance, high in mechanical intensity, high in friction and abrasion resistance, long in service life, high in heat dissipation property and heat recovery property, high in high-temperature and low-temperature resistance, high in acid, alkaline, oil, water and the like corrosion resistance and the like.

The invention belongs to the field of macromolecular composite materials and in particular relates to a wear-resistant hard composite material using a novel nanocarbon material graphene as a filler and a preparation method thereof. The composite material is a hard composite material plate formed by blending and hot-pressing a polymer matrix and the graphene, and is prepared through the following steps: mixing the graphene, the polymer matrix and a rare earth stabilizing agent uniformly; melting and blending by using a torque rheometer to obtain a block-shaped composite; hot-pressing by using a flat vulcanizing machine to obtain the hard composite plate, wherein the composite material comprises 0.1-3wt% of two-dimensional graphene nanocarbon material. The polymer-based composite material using the carbon material as the filler has the characteristics of light weight, easiness in processing, corrosion resistance, friction resistance and the like, and is widely applied in the fields of national defense industry and automobiles. The composite material can meet the increasingly higher tribological performance requirements of the fields of aviation, aerospace, automobiles, machinery and the like on the existing high-performance polymer composite materials; the preparation process of the composite material is simple; industrial production is realized easily.

The invention relates to a nickel-coated graphite self-lubricating composite material and an application thereof. An employed technical scheme is that the nickel-coated graphite self-lubricating composite material is composed of, by weight percent: 95.0-99.9 % of self-melting alloy powder and 0.1-5.0 % of nickel-coated graphite. A laser cladding coating process comprises taking the self-melting alloy powder and the nickel-coated graphite, uniformly mixing by a ball milling method or a grinding method, using a preset method or a powder feeding method, and using a continuous CO2 laser device for laser cladding on a substrate. A content of the nickel-coated graphite varies widely. The nickel-coated graphite is uniform and dense in coating structure, excellent in wear resistance and antifriction performances, and good in metallurgy combination with substrates, can meet requirements of carbon steel and alloy steel for friction and wear performance in different working conditions. A coating preparation process is high in scale and automation degree, and thus the nickel-coated graphite self-lubricating composite material can be widely applied in fields of aerospace, machinery, automobile, military industry, etc.

The invention discloses a lubricating oil composition for an engine. The lubricating oil composition can be used for lubricating the engine employing methanol or methanol gasoline as a fuel. A prepared lubricating oil composition product can be used for better solving the problems of corrosion and abrasion of the engine employing the methanol gasoline, and has high acid neutralization performance, alkaline holding performance, abrasion resistance, detergency, dispersibility and oxidation resistance, the lubrication requirements of the engine employing the methanol gasoline can be met, and the lubrication requirements of the engine employing the methanol gasoline (M5 to M100) with any proportion can be met. The lubricating oil composition comprises at least one metal detergent, an ashless dispersant, an anti-oxidative, anticorrosive and anti-wear agent, a viscosity index improver, a pour point depressant, an antirusting agent, an anti-foaming agent and base oil.

The invention provides metal ceramic powders used for thermal spraying on a furnace roller surface. The metal ceramic powders, consisting of alloy powders and ceramic powders, comprise, by weight, 13-25% of Cr, 3-10% of Al, 0.1-1% of Y, less than 12% of Ta and balance being at least one of Co and Ni. The metal ceramic powders are characterized in that: the ceramic powders contain TiB2 and Al2O3, which account for, by weight, 15-25% of total weight of the metal ceramic powders. In the invention, anti-buildup performance and friction and wear resistance performance of thermal spray coatings made by the metal ceramic powders can be effectively improved. Excellent comprehensive properties can be maintained in harsh conditions of real production.

The present invention provides a vehicle braking composite material reinforced by confusion of natural fiber and crystal whisker and preparing method thereof. The raw materials of composite friction material is composed of bamboo fiber, phenolic resin, magnesium sulfate crystal whisker, steel fiber, copper powder, graphite dust, pyrophyllite powder, aluminum oxide, iron oxide, barium sulfate and zinc stearate. The preparing method comprises the following steps: preprocessing the raw materials, mixing the raw materials, hot pressing shaping and heat processing. The invention uses the bamboo fiber with low cost for reinforcing the phenolic resin. The proper amount of wear-increasing agent, anti-wear agent and filling agent for exerting the cooperative coupling function among the substrate, the fiber/crystal whisker and filling agent, thereby obtaining the novel vehicle braking composite material which has the advantages of stable friction coefficient under different temperatures, low wear rate, high heat fading resistance, excellent braking effect, shock absorbing, noise reduction and low cost.

The invention discloses an aromatic ether-based epoxy acrylate/nanosilicon dioxide composite material and a preparation method and applications thereof. The preparation method comprises the following steps: synthesizing a bisphenol compound of an aromatic ether ketone chain segment based on substitution reaction, performing reduction of carbonyl, phenolic hydroxyl epoxy acylation, and bridging of isocyanate group of alcoholic hydroxyl group, to prepare a four-degree-functionality epoxy acrylate compound, then mixing sulfdryl-modified nanosilicon dioxide particles, and performing ultraviolet photocuring to prepare an aromatic ether-based epoxy acrylate/nanosilicon dioxide composite material. The method is simple to operate, convenient and easy. Compared with a pure acrylate material, the composite material has the advantages of high wear resistance, high hardness, excellent thermal/chemical stability and the like after being subjected to ultraviolet photocuring, thus having wide industrial application prospects.

The invention discloses a high-temperature low-friction CrAlSiON nanometer composite coating which comprises a CrN transition layer and a CrAlSiON functional layer. The coating with different components can be obtained by adopting a multi-arc ion plating technique through changing technological parameters. According to a preparation method of the coating, oxygen element is introduced into the CrAlSiON nanometer composite coating, and the existence form of oxygen in the coating is controlled by changing depositional conditions, so that one or more oxides being low in friction coefficient and resistant to abrasion can be preformed in the coating; accordingly, while the binding force of the coating is improved and the stress is reduced, the friction coefficient of the coating under the high-temperature condition can be lowered, as well as the friction resistance, the abrasion resistance and the thermal stability of the coating can be improved; and the coating is more suitable for a severer application environment.

The invention discloses a high-hardness wear-resistance netty structured double-metal titanium base composite material. With titanium or titanium alloys as basal bodies, metal for compounding, intermetallic compound particle phases automatically generated on the titanium or titanium alloy basal bodies in situ, and the metal for compounding are distributed on the surfaces of the titanium or titanium alloy basal bodies in a lantern form in sequence to form the netty structured double-metal titanium base composite material. The invention further discloses a preparation method of the high-hardnesswear-resistance netty structured double-metal titanium base composite material; and in the method, the high-energy ball milling compounding is performed on basal body powder and metal powder for compounding after high-energy ball milling; and then, the sintering is performed. The friction and wear resistance and the hardness of the double-metal titanium base composite material are improved by using an excellent self-lubricating effect of the metal for compounding and a distribution strengthening effect of the intermetallic compound particle phases; and the double-metal titanium base compositepowder is prepared by adopting the high-energy ball milling method without needing cleaning, sensitization and activation of the raw materials, so that the process is simple, the operability is high,and the large-scale industrialization is facilitated.