185results about How to "Stable hardness" patented technology

The invention relates to a chromium-free zinc aluminum anticorrosive paint and a preparation method. The invention adopts the technical scheme that the preparation method comprises the following steps of: stirring 5 to 25 weight percent of flake zinc powder and 5 to 15 weight percent of flake aluminum powder uniformly, adding 25 to 40 weight percent of organic solvent, 1.1 to 1.8 weight percent of dispersant, 3 to 8 weight percent of corrosion inhibitor and 3 to 10 weight percent of inorganic additive into the powder, and stirring the mixture for 20 to 40 minutes to form a base material; and then stirring 5 to 15 weight percent of modified resin, 1 to 3 weight percent of organic silane coupling agent and 25 to 30 weight percent of organic solvent uniformly, and adding the mixture into the base material; or stirring the mixture for 30 to 50 minutes to obtain the chromium-free zinc aluminum anticorrosive paint; or stirring the mixture for 30 to 50 minutes, adding 0.05 to 0.5 weight percent of hydroxyethyl cellulose into the mixture, and stirring the mixture for 20 to 50 minutes to obtain the chromium-free zinc aluminum anticorrosive paint. The preparation method has the characteristics of environment friendliness, low energy consumption and low cost; and a coating coated by the prepared chromium-free zinc aluminum anticorrosive paint has high impact strength, good corrosion resistance, strong bonding force and high hardness.

The invention relates to a water swelling polyurethane elastomer sealing product material and a preparation method. The material is prepared from the following three components (A), (B) and (C) through polymerization reaction of two steps, the elastomer material has water swelling property, and a main chain structure of material molecules absorbs water, wherein the (A) is hydrophilic polyether type polymer1polyol; the (B) is polyisocyanates; and the (C) is low-molecular polyol and amino chain-extended crosslinker. The molar ratio of the (B) to the (A) in an isocyanate end capping reaction is 1.3 to 2.8; and the molar ratio of a product of the isocyanate end capping reaction of the (A) and the (B) to the (C) in a chain-extended crosslinking reaction is 0.75 to 1.05. In the preparation method for the material, the reaction of the two steps is a reaction process of liquid polymerization, and the production of a product is an elastomer casting-molding process. The material has the characteristics of small mass variation rate and stable physical performance after the material absorbs the water repeatedly to swell, and permanent compression deformation and small stress relaxation.

The invention discloses a low-hardness and high-elasticity water treatment membrane component epoxy pouring sealant preparation method and application. An epoxy pouring sealant comprises a component Aand a component B, the component A comprises, by weight, 30-70 parts of epoxy resin, 5-20 parts of activated thinners, 10-20 parts of toughening agents, 5-30 parts of fillers and 0.1-3 parts of coupling agents, the component B comprises, by weight, 20-50 parts of polyether amine, 40-70 parts of alicyclic amine and 2-15 parts of curing accelerators, and the weight ration of the component A to thecomponent B is (100:10)-(100:50). By the aid of a 'trinity' toughening modified mode of the flexible toughening agents, the activated toughening thinners and flexible curing agents, the epoxy pouringsealant is characterized of low hardness, high elasticity and stable hardness within wide temperature range, the epoxy pouring sealant has excellent adhesive performance and is low in initial viscosity, high in mold filling speed, simple and convenient to operate and applicable to the fields such as package of water treatment membrane components and flexible package of electronic devices, and theblocking efficiency of the membrane components can be greatly improved.

The present invention provides a method for manufacturing a hot stamped body having a vertical wall, the method including: a hot-rolling step; a coiling step; a cold-rolling step; a continuous annealing step; and a hot stamping step, in which the continuous annealing step includes a heating step of heating the cold-rolled steel sheet to a temperature range of equal to or higher than Ac₁° C. and lower than Ac₃° C.; a cooling step of cooling the heated cold-rolled steel sheet from the highest heating temperature to 660° C. at a cooling rate of equal to or less than 10° C./s; and a holding step of holding the cooled cold-rolled steel sheet in a temperature range of 550° C. to 660° C. for one minute to 10 minutes.

The present invention provides a method for manufacturing a hot stamped body, the method including: a hot-rolling step; a coiling step; a cold-rolling step; a continuous annealing step; and a hot stamping step, in which the continuous annealing step includes a heating step of heating the cold-rolled steel sheet to a temperature range of equal to or higher than Ac₁° C. and lower than Ac₃° C.; a cooling step of cooling the heated cold-rolled steel sheet from the highest heating temperature to 660° C. at a cooling rate of equal to or less than 10° C./s; and a holding step of holding the cooled cold-rolled steel sheet in a temperature range of 550° C. to 660° C. for one minute to 10 minutes.

The present invention is directed to an improved copper plating bath for depositing a copper layer onto a printing cylinder, the copper plating bath comprising: (a) a source of copper ions; (b) a source of methane sulphonate ions; (c) a source of chloride ions; (d) an organosulphur compound having the formula R—S—R′—SO₃⁻X⁺ or X⁺—O₃S—R′—S—R—S—R′—SO₃—X⁺, wherein R is alkyl, hydroxyalkyl or alkyl ether, R′ is a C₂–C₄ alkyl group, and X⁺ is a cation; and (e) a polyether compound and method of using the same. The copper plating bath produces a plating deposit that has a stable hardness and is free from self-annealing during high speed plating.

The invention discloses unsaturated polyester gel coat resin capable of being subjected to UV-LED photocuring and a paint preparation method thereof. The unsaturated polyester paint is prepared from 90-100 parts of unsaturated polyester gel coat resin, 10-30 parts of activated thinner, 1-5 parts of photoinitiator, 1-3 parts of coinitiator, 0-20 parts of talcum powder, 0-0.5 part of dispersing auxiliary and 0.5-3 parts of other auxiliaries. The weight ratio of photoinitiator to coinitiator is (1-5):(1-3), and unsaturated polyester gel coat resin is a mixture of acrylate-terminated unsaturated polyester and activated thinner. A coating can be prepared from the paint through the UV-LED photocuring technology, deep solidification of a film 200 micrometers thick on a woodware base material can be achieved, and the coating is low in shrinkage rate, good in acid resistance and alkaline resistance, high in luster and good in adhesive force.

This invention relates to a manufacturing method for high temperature silver oxide contactor material including: 1, melting any 1-7 kinds of Sn, Cd, Bi, Cu, In and Fe in certain weight ratio with Ag for rest to alloy them completely to get an Ag strip with a single roller rejection rapid quenching machine, in which, the rotation speed of a cold quenching roller is 3-30m/s, 2, oxidating the Ag alloy strip for 12-24h under 0.1-10MPa and 500-750deg.C, 3, processing it to a contactor material by an ordinary method, in which, size of the metal oxide is small, hardness (HV0.3) can reach to 130 and will not be reduced along the rising of temperature and the contactor can work stably under 85deg.C.

The invention discloses a high-temperature resistant and abrasion-resistant white cast iron piece and a production method to solve the problem in hardness of white cast iron. The high-temperature resistant abrasion-resistant white cast iron piece is characterized in that the white iron casting comprises the following chemical compositions by mass percent: 3.0 to 3.5 percent of C, 30 to 36 percent of Cr, 1.8 to 2.5 percent of Mo, smaller than or equal to 1 percent of Si, 1.0 to 2.0 percent of Ni, 1.05 to 1.5 percent of Mn, 0.5 to 1.0 percent of B, smaller than or equal to 0.10 percent of P, smaller than or equal to 0.08 percent of S, and Fe in balancing amount; and the chromium carbon ratio of the white cast iron is 8.5 to 12. The method comprises the steps of smelting, casting, thermal insulation and cooling. The white cast iron piece has the advantages that casting-state thermal insulation slow cooling hardness HRC is larger than or equal to 61, the hardness HRC after quench tempering is larger than or equal to 66, the hardness HRC can still keep larger than or equal to 61 at 700 DEG C, the corrosion resistance of the white cast iron piece is superior to that of the existing white cast iron piece, and the white cast iron piece is particularly suitable to serve as a wear-resistant part operating under high-temperature condition.

The invention discloses a preparation method of a high-heat-conductivity type tire vulcanization capsule. The preparation method of the high-heat-conductivity type tire vulcanization capsule belongs to the technical field of tires, and comprises the following steps of (1) compounding the components according to the matching ratio: 95 parts of butyl rubber, 4 to 5 parts of chloroprene rubber, 15 to20 parts of N375 carbon black, 35 to 45 parts of acetylene black, 7 to 15 parts of graphene, 7 to 10 parts of alkane oil, 0.5 to 1.5 parts of stearic acid, 5 to 7 parts of zinc oxide, and 8 to 10 parts of resin; (2) primarily mixing; (3) filtering rubber; (4) secondarily mixing; (5) forming; (6) vulcanizing; (7) polishing; and (8) inspecting a finished product. According to the preparation methodof the high-heat-conductivity type tire vulcanization capsule provided by the invention, on the basis of ensuring the stability of various physical and mechanical properties, a heat conductivity coefficient is further improved, so that the aims of saving energy and reducing cost are achieved.

The invention discloses a pathological specimen processing method and belongs to the field of specimen processing technology. According to the processing method, sampled pathological tissues successively undergo fixation, dehydration, transparency, wax impregnation, embedding, slicing, staining and mounting so as to obtain a pathological specimen. The fixation is to fix the pathological tissues by the use of a fixative for 4-15 h. The fixative is composed of atractylol, ethoxylated acetylenediol, chlorogenic acid, polyvinylpyrrolidone, sodium chloride, ethyl acetate and pure water. The mounting is to carry out mounting on the stained pathological tissues by the use of a mixture of polyacrylamide, polyvinylpyrrolidone and xylene. According to the invention, toxicity of reagents used in the invention is obviously reduced, the fixation effect is good, degradation and transparency degree are easy to control. Then, the tissues are not easy to deform, embrittle or harden, and mounting is complete and staining is remarkable.

The invention provides an aluminum alloy, which comprises following compositions by mass percentage: 0.36 to 0.50 percent of silicon, 0.39 to 0.45 percent of magnesium, 0.01 to 0.02 percent of titanium, less than or equal to 0.10 percent of the sum of copper, zinc and manganese, less than or equal to 0.50 percent of ferrum, and the rest percent of aluminum and inevitable impurities, wherein the content of a single impurity is less than 0.5 percent and the content of total inevitable impurities is less than or equal to 0.10 percent. The aluminum alloy provided by the invention has the advantages that the content of the magnesium element is controlled in the range of 0.39 percent to 0.45 percent, so that the content of hardening phases (Mg2Si phases) in the aluminum alloy is controlled and the hardness range of the aluminum alloy is stabilized in the range of 2Hw to 5Hw; and the aluminum alloy is suitable for preparing heat radiating equipment through a flaking processing manner.

The invention relates to a method for synthesizing and preparing hard alloy powder by mixing original powder and regenerated powder and belongs to the technical field of the hard alloy and powder metallurgy. The method comprises the following steps of: oxidizing WC-Co waste hard alloys with different Co content to form a regenerated WC-Co oxide mixture; measuring the WO3 content in the regenerated WC-Co oxide mixture; according to the requirements of the Co content and the regenerated powder content in final state WC-Co mixed powder, adding native tungsten oxide, native cobalt oxide and carbon black required for implementing the requirement on the components of a final product into the regenerated WC-Co oxide mixture; carrying out ball mill mixing; and then performing the in-situ reduction and carburization reaction in the vacuum environment to obtain the hard alloy powder. According to the product obtained by the method disclosed by the invention, the native materials and the regenerated materials are totally and uniformly mixed, so that the stability of the product quality is improved and the components are accurate and controllable.

The invention discloses an anti-aging compound rubber sealing strip. The anti-aging compound rubber sealing strip is prepared from, by weight, 50-200 parts of ethylene propylene rubber, 10-70 parts of fast extruding furnace black, 1-15 parts of indirect zinc oxide, 1-10 parts of antiager, 1-15 parts of paraffin oil, 1-10 parts of lubricant, 1-10 parts of vulcanizing agent and 1-8 parts of accelerant. The accelerant is triallyl isocyanurate and/or trifunctional acrylic ester. The invention further discloses a preparation method of the anti-aging compound rubber sealing strip. The anti-aging compound rubber sealing strip has the advantages of being long in service life, resistant to aging and pressure changes and stable in hardness, and the preparation method is simple and easy to operate.

The invention relates to an anodic oxidation process for high-silicon high-copper die-cast aluminum. According to the anodic oxidation process for the high-silicon high-copper die-cast aluminum, glycerinum, organic acid, sulfate and fluoride are added in an electrolyte, the temperature of the electrolyte is controlled to be 5-25 DEG C, and the current density of an anodic oxidation power supply is1-3 A/dm<2>. The problem that due to increase of the silicon-copper content in a high-silicon high-copper die-cast aluminum alloy, anodic oxidation becomes difficult, neither the thickness nor hardness of an oxide film can be ensured, and the performance of the oxide film is poor is solved. As for the high-silicon high-copper die-cast aluminum alloy treated by the anodic oxidation process, the thickness is stabilized to be 30 [mu]m or above and can be 50 [mu]m at most, and the hardness is stabilized to be 400-450 Hv.

The invention discloses a textile frost resistance test standard sample. The textile frost resistance test standard sample is characterized in that the textile frost resistance test standard sample is produced by utilizing hard finishing agents with different concentrations to carry out hard finishing for terylene which is taken as standard sample fabric, wherein the hard finishing agent is obtained by adding 7 parts of polyvinyl acetate into 1 part of epoxy resin finishing agent, by mass, stirring and mixing uniformly, wherein epoxy resin finishing agent is prepared from 1 part of AB-EP-20 and 0.6 part of AB-HGA, by mass; the hard finishing conditions are that the fabric is subjected to twice dipping and twice padding, mangle expression is 100%, soaking time is 1 minute, predrying is carried out at a temperature of 95 DEG C for 2 minutes, and baking is carried out at a temperature of 180 DEG C for 3 minutes; concentrations of the hard finishing agent which assists in carrying out hard finishing are 10g/l, 20g/l, 50g/L, 80g/L and 200g/L respectively. The textile frost resistance test standard sample is with permanent hardness and can be tried out as a standard sample which is used with a hand feel change degree test method at a low temperature environment.

The invention relates to a manufacturing method of a vanadium-containing plastic mold steel plate. The vanadium-containing non-tempering plastic mold steel plate comprises, by weight, 0.28-0.40% of C,0.20-0.50% of Si, 1.20-1.60% of Mn, 0.030% or below of P, 0.025% or below of S, 0.80-1.20% of Cr, 0.05-0.15% of V, 0.030% or below of Ti, 0.00255 or below of B and the balance Fe and unavoidable impurities, wherein the content of Mn, Cr and V is 2.4-2.7%, the ratio of Cr to V is 9-11, and the ratio of Ti to B is equal to or higher than 8. The manufacturing method has the advantages that the alloycost is low, the tempering process window is wide, the internal quality is high, and the production process is short, and the manufacturing method can be widely used in the plastic mold manufacturingindustry.

The invention provides a production technology of a polypropylene building template, which is the technology for producing the building template by adopting waste plastics as the raw materials. The production technology comprises the steps of pretreating the raw materials, mixing the materials, and carrying out extrusion molding. The raw materials are treated based on a certain ratio and prepared into the product building template under a certain condition. The product building template has the characteristics that the construction quality is high, the building template can be recycled for a plurality of times, the cost is reduced, the benefit is increased, the energy conservation and environment protection are realized, and the residues can be recycled; and the product building template has a large market demand and wide prospect, and is an excellent substitute for steel templates, bamboo plywood and wood plywood.

The invention relates to a preparation method of a superhard boron carbide ceramic reinforced iron-based alloy composite wear-resistant coating. The preparation method comprises the following steps: (1) preparing boron carbide ceramic particles and iron-based self-fluxing alloy powder as raw materials; (2) preparing a steel substrate of which the surface is treated to form a surface to be cladded; (3) putting the boron carbide ceramic particles and the iron-based alloy powder into a ball mill for dry ball milling and mixing; (4) adding a binder into the mixed powder, uniformly stirring to form viscous paste, and coating the surface of the steel substrate with the viscous paste; (5) drying after air drying; and (6) carrying out vacuum cladding and then carrying out furnace cooling. The coating prepared by the method provided by the invention has no cracks and micropores penetrating through the whole thickness, is a continuous closed coating, and can significantly improve the wear resistance of mechanical parts, prolong the service life and improve the safety performance.