727results about How to "Good wear resistance" patented technology

Polyurethane heat-insulation structural adhesive and manufacturing method for heat-insulation aluminum profile

The invention discloses a polyurethane heat-insulation structural adhesive, which comprises components A and B, wherein the mass ratio of A to B is (90-110):(70-90); the component A comprises polyether polyol and auxiliaries; on the basis of the mass ratio of the auxiliaries to the polyether polyol, the auxiliaries comprise following components by weight percent: 0.1-0.3% of catalyst, 0.1-0.5% offlatting agent, 0.1-0.5% of de-foaming agent, 0.5-1.5% of chain extender, 0.1-5% of padding, 0.3-5% of plasticizer, 0.1-0.3% of anti-oxygen, and 0.1-0.3% of ultraviolet absorber; and the component B is isocyanate of MDI (methyl diphenylene diisocyanate) or TDI (toluene di-isocyanate). The invention also discloses a method for using the structural adhesive to prepare a heat-insulation aluminum profile. The polyurethane heat-insulation structural adhesive provided by the invention has advantages of excellent mechanical property, fatigue resistance, shock resistance, wear-resisting property, andstability. Room-temperature pouring and room-temperature solidifying processes are realized through the molding production; the pouring period is long; the molding production is not limited by temperature and the shape of aluminum profile; the operation is easily controlled; the rejection rate is low; and the molding production is beneficial to the popularization and application of the pouring type heat-insulation aluminum profile technique.

Short carbon fiber modified high friction composite and preparing method and application thereof

The invention relates to a short carbon fiber modified high friction composite and a preparing method and application thereof, and belongs to the technical field of friction materials. Raw materials used by the short carbon fiber modified high friction composite comprise 1wt.% to 3wt.% of resin coating-carbonization treatment short carbon fibers and larger than or equal to 15wt.% of nanometer oxide dispersion strengthened copper powder. In the nanometer oxide dispersion strengthened copper powder, nanometer oxide is generated in an in-situ manner. The preparing method comprises the steps thatthrough combination of internal oxidation and reduction, the nanometer oxide dispersion strengthened copper powder is prepared, meanwhile, the resin coating-carbonization treatment short carbon fibersand the nanometer oxide dispersion strengthened copper powder are processed through the proper ball milling annealing process to obtain composite pre-alloying copper powder; the powder is mixed withother components to be subject to pressing and sintering, and a finished product is obtained. The designed and prepared copper-base composite is excellent in mechanical property, high temperature resistance and wear resistance, and the preparing process is simple.

Method for preparing nano/submicron TiB-TiC enhanced titanium-base composite material (TiB+TiC)/Ti

InactiveCN101144159AGood wear resistanceLaser beam welding apparatusHeat inorganic powder coatingOxideHardness
The present invention discloses a preparation method for nanometer / submicron TiB-TiC reinforced titanium matrix composite (TiB TiC) / Ti. The method comprises steps that after a precursor body selected from Ti, B 4 C, and rare earth oxide CeO 2 powder is uniformly mixed, plasma densified granulation is performed to the precursor body to assemble the precursor body into binding grains with the grain size of about 30 micron, and cold spraying of the binding grains onto a titanium Ti-6Al-4V alloy substrate is performed, and the thickness is controlled between 0.5 and 1.0 mm. Then liquid light absorbing coating which mainly comprises nano oxide and other kinds of auxiliary agent and enhances the laser absorption rate on the CO 2 is coated on the surface of the pre-assembled coating; laser scanning is performed to the pre-assembled coating, to obtain the nanometer / submicron TiB-TiC reinforced titanium matrix composite (TiB TiC) / Ti. The present invention can organically combine the high hardness degree and the high chemical stability of ceramic material with the high tensibility and the high intensity of the titanium alloy, solve the fatal disadvantages of large titanium alloy friction coefficient and poor wear resistance, etc., and thereby can be applied to the modification of the titanium alloy components on aerospace planes and navigation ships, and the titanium alloy components of acid proof pumps and acid proof valves.

Nanometer composite structure protective coating made from high hardness CrAlSiN and preparation method of nanometer composite structure protective coating

The invention relates to a nanometer composite structure protective coating made from high hardness CrAlSiN and a preparation method of the nanometer composite structure protective coating. The preparation method comprises the following steps: (1) cleaning matrixes, and then performing ion cleaning; (2) preparing a CrN transition layer: sending the matrixes processed in the step (1) to a sputtering chamber, so that the CrN transition layer is deposited, a Cr target material is controlled by a direct current cathode, and a 200-300nm CrN transition layer is deposited; and (3) preparing a CrAlSiN layer, wherein a CrAlSi composite target material is controlled by a radio frequency cathode, and 2-4 mum of a CrAlSiN nanometer composite coating is deposited on the surface of the CrN transition layer. The coating not only has high hardness of 43.6GPa, but also has excellent high-temperature oxidation resistance and excellent corrosion resistance, so that the protective coating disclosed by the invention can be used as a protecting coating for a high-speed dry cutting cutter and equipment with high loads in other fields. The preparation method has the characteristics of simple technology, high deposition speed, low cost, high bond strength and the like, and has the advantages of high production efficiency, low energy consumption, low equipment requirements, and the like.

Silicon nitride-modified phase-change and energy-storage microcapsule and preparation method thereof

The invention discloses a silicon nitride-modified phase-change and energy-storage microcapsule, comprising a shell material and a cladded core material, wherein the shell material comprises the following raw materials in parts by weight: 50-100 parts of high-molecular polymers and 1-20 parts of silicon nitride powder which is evenly dispersed into the high-molecular polymers; the core material comprises 50-100 parts of organic phase-change and energy-storage materials and 1-20 parts of silicon nitride powder which is evenly dispersed into the organic phase-change and energy-storage materials. The invention also provides a preparation method of the phase-change energy-storage microcapsule. The thermal conductivity of the phase-change and energy-storage material is improved, overheat and overcold degrees in the phase-change process are inhibited, and meanwhile, the thermal endurance and the abrasive resistance, the thermal shock resistance, the fatigue resistance and the like also are improved. The silicon nitride-modified phase-change and energy-storage microcapsule is relatively simple in preparation technology, available in raw materials, strong in controllability, and applicable to the industrial large-scale production, an existing industrial processing technology can be fully utilized, and the performance of the phase-change and energy-storage microcapsule is improved.

Copper ammonia fiber colored woven fabric and manufacturing process thereof

InactiveCN101173401AGood wear resistanceGood hygroscopicityMercerising of sliversSingeingUptake ratePlain weave
The invention relates to a cuprammonium rayon yarn-dyed fabric and the corresponding manufacturing process. The fabric is woven by interlacing a pure cotton yarn and a cuprammonium rayon yarn; wherein, the warp of the fabric is 32 to 40 pure cotton dyed yarn, and the weft of the fabric is 32 to 40 cuprammonium rayon dyed yarn; the fabric texture is 11/13 compound twill or plain weave poplin. The manufacturing process mainly comprises yarn preparation, weaving, finishing and finished product examination, and the key of the process lies in the pre-treatment, dyeing, and post-treatment of the weft and the finishing of the fabric. The invention has the advantages that: for the fabric, the property of strength and good wear resistance of the cuprammonium rayon is rational utilized; the hygroscopicity, the air permeability, the antistatic property, the soft, smooth and qualitative texture, the wearing comport and the excellent wearability of the fabric are ensured; for the manufacturing process, shortcomings such as uneven dyeing, big color difference between inner and outer layers of the package, big color difference between batches and low one time dyeing rate in the package dyeing caused by high dyeing uptake rate, high dyeing uptake amount and high fixation amount of the cuprammonium rayon are overcome.

Wear-resistant hard composite material using graphene as filler and preparation method thereof

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.

Extrusion casting manufacture method of piston with reinforced pseudo-alloy circular groove

The invention relates to an extrusion casting manufacture method of a piston with a reinforced pseudo-alloy circular groove. The extrusion casting manufacture method is characterized by including the preparation process steps: firstly, preparing aluminum alloy for the piston; secondly, preparing pseudo-alloy components; thirdly, manufacturing a pseudo-alloy preformed part, uniformly mixing pseudo-alloy powder particles, and pressing and sintering the mixed particles via a die so that a pseudo-alloy insert ring preformed part is formed; fourthly, melting, namely, placing the prepared aluminum alloy for the piston into a melting furnace for melting, and refining, deteriorating, homogenizing and refining alloy liquid after melting; fifthly, preheating the pseudo-alloy preformed part; seventhly, performing extrusion casting; eighthly, performing aging heat treatment for a piston blank and performing air cooling after the piston blank taps off; and ninthly, machining and performing surface treatment for the piston blank so that an aluminum piston finished product is obtained. Compared with the prior art, the extrusion casting manufacture method has the advantages that the piston with the reinforced circular groove is good in wear resistance, compact in material internal texture and remarkably improved in mechanical performance, and the method is high in process efficiency and low in manufacture cost.
Owner:北方材料科学与工程研究院有限公司 +1

Aluminum alloy surface B4C particle reinforced Al base composite cladding layer and preparation method

The invention discloses an aluminum alloy surface B4C particle reinforced Al base composite cladding layer and a preparation method, overcomes the problem that a traditional technology is difficult to remove compact oxide films quickly grown on surfaces of aluminum and an alloy of the aluminum, solves the problems of difficult powder feeding due to light mass of B4C particles and weak wettability with aluminum alloy molten liquid, and effectively leads the B4C particles in the aluminum alloy surface layer to form an Al base composite cladding layer with excellent metallurgic bonding. In cooperation with the powder-wire composite cladding technical scheme, by using consumable electrode inert gas protective welding-MIG welding, aluminum alloy welding wires are transited to the aluminum alloy wire, the side injection of the B4C particles is assisted to fuse in the Al base cladding layer, that is, the B4C particle reinforced Al base composite cladding layer is prepared on the aluminum alloy surface. The B4C particle reinforced Al base composite cladding layer and an aluminum alloy substrate are excellently bonded, and the B4C particles in the cladding layer and an Al matrix are excellently bonded, and obvious defects such as air holes and cracks are avoided; and the aluminum alloy surface B4C particle reinforced Al base composite cladding layer is higher in wear resistance compared with 45 steel.
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