72results about How to "High hardness" patented technology

The invention discloses a lightweight cylinder sleeve and a preparation process thereof, and belongs to the technical field of saline-alkali soil treatment and application. The problem that a good formula for reducing the size and weight of an engine and therefore enabling a cylinder sleeve to achieve a good use effect is not arranged inside is solved. Multiple pocking marks are arranged on one side of the annular outer surface of a cylinder body, the tops of the pocking marks are arc surfaces, and a transmission shaft fixing hole is formed in one side of the annular outer surface of the cylinder body. Through the cylinder sleeve and the preparation process thereof, the hardness of the cylinder sleeve can be effectively improved, wear resistance of the cylinder sleeve can be improved, the wall thickness can be the cylinder sleeve is reduced, the size of an engine can be reduced, the mass of the engine can be reduced, through burrs on the outer circle face of the cylinder sleeve, the solidification speed of the cylinder sleeve is increased, bainite transformation is promoted, the adding amount of precious metal Mo and Ni can be changed, and therefore the overall forming body is reduced, meanwhile, molds of different sizes can be clamped and fixed, and external personnel can conveniently do pouring treatment work.

A method of making semiconductor devices with contacts protruding from openings in a passivation layer over an active chip area. Inside each opening, a relatively hard barrier layer is provided and a flash-plated film is applied to subsequently form a relatively soft diffusion barrier layer when a protruding contact is formed. Two semiconductor devices with electrodes are joined by embedding relatively hard electrodes of a first device into relatively soft electrodes of a second device. A reducing agent can be incorporated into an insulating resin applied between semiconductor chips at areas other than the bonded electrodes.

The invention discloses a preparation method of a high-entropy ceramic coating. The method comprises the following steps: firstly, mixing a plurality of single-element compound raw material powder toobtain composite powder, and then mixing a binder into the composite powder to prepare multi-element composite powder for thermal spraying, wherein the single-element compound is carbide, nitride or diboride, and the multiple elements are any five or more of zirconium, titanium, hafnium, tantalum, niobium, vanadium, chromium, molybdenum or tungsten; secondly, pretreating the surface of a substrateof the required coating; and thirdly, spraying the multi-component composite powder on the surface of the substrate by adopting a thermal spraying method so as to form the high-entropy ceramic coating through in-situ synthesis. The high-entropy ceramic coating prepared by the invention has high compactness, hardness, wear resistance, corrosion resistance, high-temperature resistance and oxidationresistance.

The invention relates to a hydrophobic scratch-resistant coating on the surface of an organic polymer and a preparation method thereof. The coating is a double-layer coating, and the first layer (bottom layer) is composed of 30-70% organic-inorganic hybrid resin, 20- The organic-inorganic hybrid coating composed of 50% oligomer, 5-25% reactive diluent, 1-2% photoinitiator and 0.2-3% additive is formed by UV curing; the second layer (top layer ) includes particles hydrophobically modified with an unsaturated double bond-containing organosilicon monomer, which particles are immobilized by a UV-curable resin. The coating has the characteristics of strong adhesion, high hardness, and good hydrophobicity, and can be used for coating protection of organic polymer surfaces.

The invention discloses high-temperature bearing steel and a cleaning and homogenizing preparation method thereof, and belongs to the technical field of alloy steel. The high-temperature bearing steel comprises the following chemical components in percentage by mass: 0.80-0.85% of C, less than or equal to 0.35% of Mn, less than or equal to 0.25% of Si, 4.00-4.25% of Cr, 4.00-4.50% of Mo, 0.90-1.10% of V, less than or equal to 0.15% of Ni, less than or equal to 0.25% of W, less than or equal to 0.040% of Nb, less than or equal to 0.010% of Al, less than or equal to 0.001% of Ca, less than or equal to 0.0040% of Ti, less than or equal to 0.0007% of O, less than or equal to 0.0020% of N, less than or equal to 0.001% of H and the balance of Fe and inevitable impurities. The process comprises the steps of raw material preparation, electrode bar pouring in a vacuum induction furnace, air cooling, polishing, vacuum consumable remelting, steel ingot annealing and polishing, forging, rolling and material forming and annealing. The high-temperature bearing steel has the beneficial effects of high strength, high hardness, wear resistance, high rotation bending fatigue ultimate strength, excellent fatigue performance and good dimensional stability at room temperature and 300 DEG C.

A double-membrane seawater desalination process specifically comprises the following steps: (1) taking shells aged for two years; (2) crushing the shells into particles; (3) adding the crushed shellsinto a packed tower; (4) fully mixing raw water and carbon dioxide in a mixer; (5) adding a carbon dioxide aqueous solution generated in the step (4) into the packed tower; (6) adding the water produced in the packed tower in the step (5) into a filter through a water pipeline; (7) adding the water filtered in the step (6) into an ultraviolet sterilization device; and (8) putting the product waterin the step (7) directly into a drinking water storage tank for backup. The method has the beneficial effects that the hardness and mineral content of the produced water can be improved, the production efficiency is improved, the cost is saved, the produced water meets the requirements of drinking water, and the precipitation content of the trace element strontium reaches the standard of drinkingnatural mineral water.

The invention discloses an inorganic ceramic coating for building durability protection. The inorganic ceramic coating comprises a component A and a component B, the component A comprises the following raw material components in parts by weight: 100 parts of a silane monomer, 10-60 parts of a solvent, 50-100 parts of silica sol and 0-5 parts of an auxiliary agent; and the component B comprises the following raw material components in parts by weight: 100 parts of a solvent, 10-30 parts of nano magnesium oxide and 0.5-5 parts of an auxiliary agent. The invention also discloses a method for forming the durable protective inorganic ceramic coating on the building material, the component A solution and the component B solution with the mass ratio of 2: 1 are stirred and mixed, brushing construction can be carried out after uniform mixing, the one-time film forming thickness is 120 microns, and the durable protective inorganic ceramic coating has excellent hardness, wear resistance, compactness and the like.

A structure of a motor-mount for an electric vehicle that supports a lower part of a motor of an electric vehicle includes a core into which a bolt fastened to the motor is inserted in a center, a stopper that is coupled to surround an outer circumferential surface of the core, and is made of rubber, an insulator that is connected to a lower end of the stopper, is coupled to a lower part of the core, and has a concave lower surface, and a housing into which the core, the stopper and the insulator are forcibly inserted, where the housing has a cylindrical shape in which a bottom is opened, and an outer circumferential surface of the stopper comes in contact with an inner circumferential surface of the housing.

The invention discloses a thermal insulation daily-use ceramic product and a preparation method thereof. The ceramic product comprises, by weight, the following raw materials: 30-40 parts of kaolin, 15-25 parts of a shell, 10-20 parts of vermiculite, 5-15 parts of a hollow micro powder, 5-14 parts of zirconia, 10-15 parts of an aqueous acrylic emulsion and 6-10 parts of a mangosteen shell, 5-10 parts of a glass fiber, 2-4 parts of ethyl orthosilicate, 3-5 parts of vanadium pentoxide, 10-20 parts of an epoxy resin, 1-4 parts of a polyester resin, 1-2 parts of a dispersing agent and 1-3 parts ofa silane coupling agent. The thermal insulation daily-use ceramic product is simple in production technology, free of pollution in the production technology and low in raw material cost, and by meansof a scientific raw material formula, the heat conductivity coefficient of the prepared ceramic product is low and the thermal insulation daily-use ceramic product has an excellent thermal insulationperformance and is healthy, environmentally friendly and durable.

The invention discloses a mobile phone shell manufacturing method. The mobile phone shell manufacturing method comprises the following steps that a polymethyl methacrylate material is injected into aninjection mold, and an initial material is obtained after injection molding; colored paint with a set color is sprayed to the inner surface of the initial material, and then black paint with a shading effect is sprayed to the inner surface to obtain a basic material; the basic material is hardened, and the hardened basic material is polished for a plurality of times and subjected to surface coating for a plurality of times to obtain a semi-finished mobile phone shell; and the semi-finished mobile phone shell is coated to obtain a finished mobile phone shell. According to the technical scheme,the manufactured mobile phone shell has good hardness and toughness, and the method for carrying out surface treatment on the mobile phone shell is simple in machining process and high in yield.

A hybrid pad for a disc brake has first friction members and a second friction member. The first friction members can be positioned at a rotor rotation inlet portion and at a rotor rotation outlet portion of the pad. The second friction member can be positioned at a central portion of the pad. The first friction members include a Young's modulus E1, a friction coefficient μ1 and a sum of the sliding areas A1 of the paired first friction members to come into sliding contact with the disc rotor. The second friction member has a Young's modulus E2, a friction coefficient μ2 and a sliding area A2 to come into sliding contact with the disc rotor. The μ2 is higher than the μ1, the E2 is higher than the E1, and (E2×A2)/(E1×A1) is 0.8 or more and 1.2 or less.

The polyvinyl chloride resin composition for automotive electric wire of the present invention comprises (A) 100 parts by weight of polyvinyl chloride and, incorporated thereinto, (B) 24.0-26.0 parts by weight of a trimellitic-acid-based ester plasticizer, (C) 5-10 parts by weight of a non-lead stabilizer, (D) 2-10 parts by weight of a reinforcing agent, (E) 2-8 parts by weight of an impact absorber, and (F) 0.3-1.2 parts by weight of a processing aid, and has a Shore D hardness of 68 or higher and a cold resistance, as a property of the material, of −10° C. or below.

The present invention discloses one kind of guide and guard roller for guiding steel billet in high speed wire rolling machine and its making process. Chemically, the guide and guard roller has material comprising C 0.7-1.4 wt%, Wt% 7.0-10.0 wt%, V 0.8-1.5 wt%, Cr,5.0-10.0 wt%, B 1.2-2.5 wt%, Mo<1.5 wt%, Si<1.5 wt%, Mn<1.5 wt%, RE 0.08-0.18 wt%, Mg 0.05-0.15 wt%, Ti 0.08-0.20 wt%, S<0.05 wt%, and P<0.05 wt%, except Fe and inevitable impurity. The guide and guard roller is made through electric furnace smelting and precise wax mold casting or evanescent mold casting. It has high strength, high toughness, high wear resistance, high fatigue and oxidation resistance, high quick cooling and heating resistance, and use performance obviously higher than that of high Ni-Cr cast steel guide and guard roller.