37results about How to "Play a role in reducing friction" patented technology

The invention relates to a titanium alloy surface multi-element laser alloyed layer and a preparation method thereof. The preparation method comprises the following steps: by using titanium alloy as a base material, applying mixed powder of B4C, graphite, Ti powder and rare-earth oxides Y2O3 used as a coating material onto the titanium alloy surface, and carrying out laser scanning while blowing nitrogen gas to perform alloying, wherein the coating material comprises the following components in percentage by mass: 10-90% of B4C, 10-90% of graphite powder, 0-50% of Ti powder and 0-4% of Y2O3.In an open N2 environment, the B4C and graphite powder are subjected to boron-carbon-nitrogen multi-element composite laser alloying on the titanium alloy surface to prepare the high-hardness wear-resistant composite ceramic coating. The simultaneous addition of the Ti powder and rare-earth oxides Y2O3 is beneficial to enhancing the microhardness and wear resistance of the alloyed layer; and the proper amount of Ti can promote the in-situ reaction in the alloyed layer, and the Y2O3 can refine the structure, thereby enhancing the comprehensive mechanical properties of the coating.

The invention comprises: using the one of graphite and coke materials or their mixture as basal body; it has 40%-60% of total component mass percent; using the chopped carbon fiber as the reinforcing agent, which has 1%-5% of total component mass percent; using the self-solidifying phenolic resin as the bonding agent, which has 15-30% of total component mass percent; using the one of copper powder and copper fiber or their mixture as conducting component, which has 5-30% of total component mass percent. The fabrication method comprises: 1) pre-drying; 2) blending procedure; 3) pressing procedure; 4) post-processing procedure.

The invention belongs to the technical field of metal material surface deposition nanometer composite anti-microbial coatings and particularly relates to a titanium nitride copper (called Ti-Cu-N in the following) nanometer composite anti-microbial coating and a preparation method thereof. A transition layer formed by a Ti film, a middle layer formed by a TiN film and a Ti-Cu-N layer are sequentially arranged on the surface of a base body, and the thickness of the Ti-Cu-N nanometer composite anti-microbial coating ranges from 1 micrometer to 10 micrometers. According to the coating, the magnetic field enhancement arc ion plating technology is adopted for completion, and the nanometer composite anti-microbial coating prepared through the method has good anti-microbial performance and also has the beneficial effects of being high in hardness, good in coating toughness, resistant to abrasion and the like.

The invention relates to a laser alloying layer on a titanium alloy surface and a preparation process thereof. Titanium or titanium alloy is used as a matrix material, and BN or BN and graphite powder are used as a coating material which is applied to the matrix material; a continuous laser is used for scanning a sample, wherein the service power is 800-1,200W, the diameter of a light spot is kept at 4mm, and the scanning speed is 2-10mm/s; in a scanning process of a laser beam, argon is blown to protect a molten pool and a laser lens barrel, and the argon pressure is kept at 0.2-0.4MPa. In the invention, the BN and graphite powder have similar structure and relatively good compatibility; after laser treatment, possible residual BN and graphite particles on the alloying layer can realize an antifriction effect to a certain degree; the surface of the alloying layer is relatively flat, the microstructure is dense, and the hardness is remarkably improved over the matrix.

The invention discloses a high-strength wearproof iron-based powder metallurgy bearing material and a preparation method thereof. The high-strength wearproof iron-based powder metallurgy bearing material is characterized by being composed of the following components by weight percent: 16.0%-18.0% of copper, 0.80%-0.90% of carbon, 0.01%-1.0% of cerium fluoride and the balance of iron, wherein the total amount of impurities is not higher than 2%. The process for preparing the iron-based powder metallurgy bearing material comprises the steps of mixing powder, pressing, sintering, heat treatment and vacuum oil immersion. The iron-based powder metallurgy bearing material provided by the invention has high-strength wear-resisting properties, specifically, the crushing strength of the bearing material ranges from 720 MPa to 780 MPa, the Rockwell hardness of the bearing material ranges from 90 HRB to 110 HRB, the oil length of the bearing material ranges from 13% to 16% and the oiling friction coefficient of the bearing material ranges from 0.08 to 0.09. The material provided by the invention is used as oil cylinder bearings of engineering machinery, such as an excavator and a bulldozer.

The invention relates to a lubricant additive containing nano ferrous sulphide granules. The lubricant additive is composed of 1-20wt% of nano ferrous sulphide granules and 80-99wt% of basic lubricating oil, and granularity of nano ferrous sulphide is 10-50nm. The lubricant additive can serve as additives of multifunctional lubricating oil and lubricating grease and also can serve as a repairing antiwear agent for a lubricating system of large-scale mechanical equipment used for various vehicles, ships, petrochemical engineering and mines.

The invention relates to a combined multi-channel end face sealing rotary compensator. The combined multi-channel end face sealing rotary compensator comprises a rotary seat, a rotary core tube and apacking gland, wherein a sealing filler is arranged in a sealing cavity; an inner convex ring is arranged on the inner wall of the rotary seat; a stepped outer boss is arranged at the right end of therotary core pipe; and an assembly gap between the outer boss and the inner convex ring is positioned at the middle position of the bottom of the sealing cavity; the outer boss of the rotary core tubeis provided with at least two steps, and an end face sealing ring is embedded between the side surface of the step and the inner convex ring. The sealing filler comprises a pressure-change metal ringand a nonmetallic flexible filler, wherein the pressure-change metal ring generates radial expansion and deformation under the action of an external force, and the inner and outer side edges of the pressure-change metal ring are closely matched with the side wall of the sealing cavity. According to the combined multi-channel end face sealing rotary compensator, a multistage end face sealing ringis arranged between the outer boss of the rotary core tube and the inner boss of the outer sleeve, and the sealing ring forms a positive correlation self-sealing effect along with the change of the pressure of the pipeline medium, so that the sealing effect is enhanced. The combined multi-channel end face sealing rotary compensator has the advantages of strong high temperature resistance, high pressure resistance, good sealing effect, long service life and convenient installation.

The invention discloses a high-antifriction iron-based sulfide powder metallurgy oil-containing bearing material as well as a preparation method and application thereof. The material is prepared fromthe following components in percentage by weight: 18.0%-22.0% of copper, 0.60%-1.1% of carbon, 0.8%-2.6% of tungsten, 0.6%-2.2% of chromium, 0.8%-2.8% of molybdenum, 0.8%-3.2% of nickel, 0.8%-2.2% ofvanadium, 0.08%-1.2% of sulfur and the balance iron, and Cu2S is distributed in pores of a microstructure of the material. Due to the existence of pores in the sintered material, in the vulcanizationprocess, sulfur coated on the surface of the sintered material is heated to be in a molten state, enters the communicated pores of the sintered material, reacts with Cu in a sintered material matrix and generates Cu2S. Cu2S is an antifriction component, so that the antifriction effect of the material can be improved, and the friction coefficient is reduced, and the high-antifriction iron-based sulfide powder metallurgy oil-containing bearing material is obtained.

The invention provides a preparation method of a nonferrous alloy anti-corrosion layer. The preparation method comprises the following steps of raw material proportioning of a sol-gel solution, sol preparing, preparing of the sol-gel solution, film layer dipping and film layer drying. According to the method, sol-gel solution hole sealing is carried out on the porous microarc oxidization film, aneven film layer is obtained, surface clearances are reduced, binding force and smoothness are better, the coverage rate of a ceramic layer after nonferrous alloy oxidization is improved, the functionof hole sealing is achieved, the anti-friction function is also achieved, and the defects of surface needle holes, cracks and the like are overcome.

The invention discloses a preparation method of a titanium element modified Ti3SiC2 enhanced Cu-base pantograph sliding plate. The preparation method comprises the steps that Ti3SiC2 ceramics are cleaned; the Ti3SiC2 ceramics are subjected to titanizing treatment by adopting a multi-arc ion plating technology, and a TiN plating layer generated in situ is obtained on the surface of the Ti3SiC2 ceramics; and then the proportioned Ti3SiC2 ceramics and metal powder are poured into a mould for cold pressing, sintering, re-pressing and resintering treatment, and after cooling and demoulding are carried out, the Ti3SiC2 enhanced Cu-base pantograph sliding plate is obtained. Introduced titanium elements can form TiN phases at the interface of a Cu-Ti3SiC2 composite in situ, so that a Cu base and Ti3SiC2 form metallurgical bonding, the interface bonding property of the composite is improved; and decomposition of the Ti3SiC2 can be inhibited through TiN, and it is guaranteed that the structure of the Ti3SiC2 is complete, so that the mechanical property and the wear resistance of the composite are improved, and the service life of the pantograph sliding plate is prolonged.

The invention discloses an alloy material for a bearing rolling body. The alloy material is prepared from the following raw materials in parts by weight: 80-100 parts of a base material, 9-11 parts ofa lubricant and 6-7 parts of modified graphene oxide, wherein the base material comprises Ti powder, Al powder, Cr powder, Nb powder and Al2O3 powder. The invention also discloses a preparation method of the alloy material. The preparation method comprises the following steps: two-step grinding, plasma sintering and the like. By taking the Ti powder, Al powder, Cr powder, Nb powder and Al2O3 powder as the base material of the alloy, the alloy material is prepared by means of two-step grinding and plasma sintering by adding the lubricant and the modified graphene oxide. By adding the stretchedlaminar graphene oxide, the mechanical properties of hardness, strength and the like of the alloy material can be improved. The self-lubricating effect of the alloy material can be improved by meansof a synergistic effect of the lubricant and a graphene lubricating film. The alloy material is prepared into the bearing rolling body which is excellent in comprehensive performance.

The invention provides a wear-resistant material, a preparation method and an application. The material comprises the following components in percentage by mass: 20%-25% of ceramic tungsten carbide powder, 40%-60% of Mo-B powder, 5%-10% of metal Co powder, 4% of large tungsten carbide particles and the balance of Fe. A nano-cermet coating is prepared from a novel ceramic wear-resistant powder material, the problems of poor wear resistance of current hob rings, and failure of frequent tipping, edge rolling, abnormal wear and the like and the problems of short service life, frequent replacementand the like due to lack of wearability are solved, the nano-cermet coating is prepared from the novel ceramic wear-resistant powder material, the binding strength between the coating and a ring matrix is high, the material has good compactness, low porosity, high hardness and good wear resistance, frequent stop and hob change caused by lack of wear resistance are reduced, and powerful support andguarantee are provided for efficient tunnel construction and excavation.

The invention relates to a zero-thrust multifunctional rotating compensator and a manufacturing method thereof. The compensator comprises a rotating pipe and a rotating seat; one end of the rotating seat is provided with a rotating seat flange, and the other end of the rotating seat is provided with an arc-shaped shrinkage pipe; one side of the rotating seat flange is provided with a gland flange; the outer circumference of the rotating pipe is provided with a convex ring; the inner wall of the rotating seat is provided with a packing ring; the gland flange and the convex ring of the rotating pipe form a first packing cabin; the convex ring of the rotating pipe and the packing ring of the rotating seat form a second packing cabin; the end, close to the arc-shaped shrinkage pipe of the rotating seat, of the rotating pipe is provided with a port which is outwards turned; and an end surface sealing ring is arranged between the outwards-turned port of the rotating pipe and the packing ring of the rotating seat. The manufacturing method comprises the steps: (1) outwards turning the end of the rotating pipe; (2) arranging a metal end surface sealing ring; and (3) stretching the end of the rotating seat to form an arc-shaped pipe which is inwards shrunk. The zero-thrust multifunctional rotating compensator is suitable for a high-pressure heat pipe network, free of welding in whole, high in bearing strength, free of eccentricity, good in sealing performance, safe and reliable in use and long in product life.

The invention provides a preparation method of a self-lubricating coating of a traveller for textile. The preparation method comprises the following steps: 1, carrying out surface pre-treatment on the traveller for textile; 2, dipping into plating liquid to plate to obtain an Ni-P-MoS2 self-lubricating coating on the surface of the traveller for the textile. The preparation method, provided by the invention, is simple, easy to control and short in process flow; the self-lubricating coating of the traveller for the textile, prepared by the invention, is compact, uniform and firmly combined with the traveller for the textile, and has the advantages of high hardness, good wear resistance and good anti-corrosion protection performance.