42results about How to "Meet the requirements of corrosion resistance" patented technology

The invention discloses ultrahigh-strength martensitic stainless steel and a preparation method thereof. The ultrahigh-strength martensitic stainless steel is high in yield strength, high in tensile strength, good in ductility and good in impact toughness. The preparation method comprises the steps as follows: Step 1, a raw material is prepared from stainless steel components in percentage by weight according to the burnt value, is smelted in the vacuum environment and is poured to form a steel ingot; the steel ingot is prepared from components in percentage by weight as follows: 0.10%-0.25% of C, 11.0%-17.0% of Cr, 0.5%-2.0% of Mn, 1.1%-3.0% of Si, 0.1%-4.0% of Ni, 0.1%-0.3% of Cu, less than or equal to 0.02% of P, less than or equal to 0.02% of S and the balance of Fe and inevitable impurity elements; Step 2, forging of the steel ingot is started at 1,050-1,200 DEG C, the finish forging temperature ranges from 880 DEG C to 920 DEG C, the forging ratio is larger than or equal to 5, and air cooling is performed after forging; Step 3, a forging is subjected to heat preservation at 950-1,050 DEG C for 2-4 h, is subjected to water quenching and then is tempered at 200-300 DEG C for 2-4 h, and the ultrahigh-strength martensitic stainless steel is obtained after natural cooling.

A corrosion-proof brass band for plate heat exchanger and its production are both disclosed herewith. It contains (wt%): Cn 76-79, Al 1.0-3.5, Ni 0.3-1.5, B 0.002-0.015, As 0.01-0.1, Ce 0.05-0.2, and balanced with Zn, and with impurity not more than 0.3. It is produced by: weighing, smelting, casting, hot rolling, end-surface milling, primary rolling, inter-annealing, cold rolling, inter-annealing, edge cutting, pre-rolling, inter-rolling, fine rolling, final annealing, surface treating, cutting, and packing. It is of size (0.4-8.5mm)X(300-1000mm)X(500-3000mm), performance of Rm not less than 410MPa, A11.3 not less than 40%, Hv1 not less than 90, grain 0.010-0.030mm, and Ra larger than 0.2um without scratches.

The invention relates to an anti-hydrogen embrittlement, high-strength and high-toughness stainless steel bar for a fastener, and a manufacturing method thereof, belongs to the technical field of metal materials, and solves the problem of low matching degree of anti-hydrogen embrittlement property and high toughness of a fastener used in an aerospace environment. The anti-hydrogen embrittlement, high-strength and high-toughness stainless steel bar for the fastener comprises the following elements in mass fraction: 0.0001%-0.01% of C, 0%-0.10% of Si, 0.01%-0.15% of Mn, 0%-0.005% of S, 0%-0.015%of P, 10.50%-12.50% of Cr, 10.70%-11.50% of Ni, 0.75%-1.25% of Mo, 1.20%-1.70% of Ti, 0%-0.10% of Al, not greater than 1.5ppm of H, and the balance iron and inevitable impurities. The stainless steelbar meeting the comprehensive performance of high strength, high toughness and anti-hydrogen embrittlement property simultaneously is prepared, and the use requirement of the fastener making contactwith a corrosive medium and used for the aerospace environment is met.

The invention discloses high-strength high-corrosion-resistance anti-microbial stainless steel and a preparation method of the high-strength high-corrosion-resistance anti-microbial stainless steel. The stainless steel has high performance, particularly high antibacterial property, high safety, ultra-high strength, high corrosion resistance, high wear resistance and good toughness. Compared with existing stainless steel for cutters, the high-strength high-corrosion-resistance anti-microbial stainless steel has the advantages of high hardness, high corrosion resistance, good antibacterial property and the like. Compared with steel for existing cutters, the content of carbon and chromium is adjusted in components, the silver element and the rare earth element are added, so that the materialhas high hardness and sharpness besides corrosion resistance and antibacterial property, the requirements of consumers can be met, and the grade of the cutters is improved. The steel has the high hardness of 56.0-60.0HRC, high pitting corrosion resistance and salt fog resistance. The steel is applicable to tools such as kitchen knives, scissors and the like, and can also be applied public facilities, household appliances and medical appliances.

The invention relates to a pneumatic valve actuator. The pneumatic valve actuator comprises an air cylinder assembly, a piston assembly, a drive output assembly, an end cover assembly and a spring return assembly, wherein the air cylinder assembly comprises an air cylinder; the piston assembly comprises two pistons which are symmetrically arranged left and right; the two pistons are oppositely arranged in the horizontal direction; the two pistons are arranged in an inner cavity of a cylinder body main shaft of the air cylinder; the drive output assembly comprises a rotary shaft and an output insert; the output insert is arranged in a central through hole of the rotary shaft in a limiting mode, and rotates along with the rotary shaft; the drive output assembly is arranged in the air cylinder; a rack section part of the rotary shaft is in engaged and power connection with first racks of two pistons of the piston assembly; the end cover assembly comprises two end covers; the two end covers are separately mounted on the air cylinder from left and right ends; the spring return assembly comprises 2n springs; and the two groups of the springs are separately arranged between the end coverat one side inside the air cylinder and the corresponding piston to elastically support the corresponding piston. The actuator can operate for a long time under a high-corrosion special working condition.

The invention relates to a fan, in particular to the application of a diamond-like film on an impeller. The diamond-like carbon film is used as a coating, which is plated on the flow channel of the impeller. The present invention adopts the omni-directional plasma injection method on the inner wall of the irregular shape such as the impeller, and coats the diamond-like film on the inner wall of the irregular shape, so that the inner surface of the irregular shape can be uniformly realized, and avoids the influence of some conventional surface heat treatment on the shape of the product, etc. Restriction, and the uniform coating of DLC film inside the impeller flow channel can effectively improve the service life and efficiency of the impeller while avoiding the problem of regular online cleaning.

The invention discloses a roller coating process of an ultra-thick coating color-coated steel plate. The roller coating process comprises at least two primer coating steps and at least two finish paint coating steps. In the first primer coating step, the pressure between a primary coating roller and a primary coating material roller is controlled to be 1600-1800kg. After the first primer coating step, the steel plate is baked by a baking oven, the interior of the baking oven is divided into a first baking area, a second baking area, a third baking area, a fourth baking area and a fifth bakingarea in sequence in the moving direction of the steel pipe, wherein the baking temperature in each baking area is sequentially increased. In the second primer coating step, the pressure between a finish coating roller and a finish coating material roller is controlled to be 1600-1800kg. After the second primer coating step, the steel plate is baked by the baking oven. The moving speed of the steelplate is controlled within 55-65mpm in the first primer coating step, the second primer coating step and baking steps afterwards.

The invention discloses a method for manufacturing a magnesium alloy colorless transparent film and a product with the same. The method includes the following steps: providing a magnesium alloy product, and finishing the product surface; degreasing the finished magnesium alloy product in an alkalescent degreasant and removing surface grease; carrying out surface conditioning on the degreased magnesium alloy product in strong aqueous alkali; carrying out brushed treatment on the surface-conditioned magnesium alloy product, cleaning the surface, removing surface dust, and showing metal texture of the product; dip-coating the brushed magnesium alloy product in aqueous solution of polyvinylpyrrolidone with the mass fraction of 0.5-2%, generating the colorless transparent film on the product surface, taking out the film and then drying and warming the film by the fire. The product with is the one obtained after being processed with the method. Therefore, metal texture of the brushed magnesium alloy workpiece can be shown, and the requirement for corrosion resistance is also met.

The invention discloses a soluble acid-resistant aluminum alloy oil pipe, a preparation method thereof and aluminum alloy thereof. The oil pipe comprises an oil pipe material and an acid-resistant coating on the inner wall of the pipe material, wherein the oil pipe material is made of aluminum alloy; and the aluminum alloy comprises the following components in percentage by weight: 3.8 to 4.9% ofCu, 0.3 to 0.9% of Mn, 1.2 to 1.8% of Mg, 0.4 to 0.6% of Ni, 0.05 to 0.1% of Fe and the balance Al and impurities. The preparation method for the pipe material comprises the following steps of: smelting and refining the components to obtain a cast ingot; heating the cast ingot for homogenization treatment; extruding the homogenized cast ingot into the pipe material; performing solution treatment on the extruded pipe material; and finally, performing acid-resistant coating treatment on the inner wall of the pipe material subjected to the solution treatment. The oil pipe material can be dissolved in formation water, so that the task of fishing the oil pipe after production can be completely avoided; the inner wall of the pipe material is acid-resistant, so that the problem of corrosion, breakage and separation of the pipe wall is solved; and the oil pipe can be used as a pipeline for conveying acid liquor, and the strength meets the strength requirements of oil well formation and operation.

The invention provides a fastener for aviation and a preparation method of the fastener. Design components of raw materials comprise, by weight percent, not larger than 0.08% of C, not larger than 2.0% of Mn, not larger than 0.03% of P, not larger than 0.02% of S, not larger than 1.0% of Si, 24.0%-27.0% of Ni, 13.5%-16.0% of Cr, 1.0%-1.5% of Mo, 1.75%-2.3% of Ti, not larger than 0.4% of Al, 0.1%-0.5% of V, 0.001%-0.010% of B, not larger than 0.25% of Cu and the balance Fe. The fastener not only has good strength and hardness, but also has good high-temperature corrosion resistance, good processing property and high thermal strength, and can completely meet the requirements of the force-bearing part fastener for aviation for materials.

The invention belongs to the technical field of steel plate preparation, and particularly relates to high-strength galvanized building floor steel. The steel comprises the chemical components including, by weight percentage, 0.03-0.15% of C, 0.1-0.3% of Si, 1.00-1.50% of Mn, 0.30-0.35% of Alt, 0.01-0.012% of Ti, 0.5-0.6% of Cr, 0.01-0.05% of Ni, less than or equal to 0.02% of S, less than or equalto 0.01% of P, less than or equal to 0.03% of N and the balance of Fe and inevitable impurities. According to the steel, Ni, Ti and Cr are added, the requirement for corrosion resisting performance is met, the yield strength of the steel is improved to 400 MPa, the tensile strength is 1000 MPa or above, and the ballistic work at the temperature of subzero 50 DEG C is 85-90 J.

The invention discloses a pre-primer combination agent for a color-coated sheet, a preparation method of the pre-primer combination agent, the color-coated sheet and a production method of the color-coated sheet. The pre-primer combination agent for the color-coated sheet comprises the following raw materials in percentage by weight: 20-30% of water-based resin; 0.5%-1.0% of a curing agent; 5%-10% of a silane coupling agent; 2%-4% of an inorganic corrosion inhibitor; 0.1%-0.3% of a complexing agent; 0.5%-1.5% of a friction modifier; 1%-4% of a polyvinyl alcohol solution; by using the pre-primer integrated medicament for the color-coated sheet provided by the invention, a passivation pretreatment process and a primer coating process can be integrated, an obtained coating can have the functions of a passivation layer and a primer layer at the same time, and the home appliance color-coated sheet produced by using the pre-primer integrated medicament has excellent corrosion resistance, oil stain resistance and chemical resistance; and the use requirements of household appliances can be met.

The invention relates to the technical field of micro-arc oxidation, in particular to an aluminum alloy micro-arc oxidation electrolyte, a method and a product thereof. The aluminum alloy micro-arc oxidation electrolyte is prepared from the components: 5-30g/L of water-soluble phosphate, 1-10g/L of alkali metal hydroxide and 5-30g/L of citrate, and a solvent is deionized water. Compared with the prior art, the formula of die-casting aluminum micro-arc oxidation electrolyte can solve the problems of rough surface, large micropore diameter and poor corrosion resistance of a micro-arc oxidation film prepared by an existing electrolyte. The micropore diameter of the prepared micro-arc oxidation film is only 0.5-2[mu]m, the requirements of aluminum alloy micro-arc oxidation for corrosion resistance can be met, and the surface of the film is more smooth.

The invention discloses an inlet/outlet unit of a high-strength and corrosion-resistant pump formed by two materials through die pressing. An orifice of the pump is made of plastic and is an inlet and/or an outlet, an annular groove is formed in the outer side of the orifice, a metal flange is arranged in the annular groove, part of the metal flange is located in the annular groove, and the otherpart of the metal flange is located outside the annular groove, a plurality of flange holes are formed in the area located outside the annular groove, and the metal flange and the orifice are formed by die pressing. The inlet/outlet unit can not only meet the corrosion-resistant requirement, but also can meet the strength requirement, is formed by die pressing once and has high formation efficiency.

The invention discloses a device for recovering and treating a photoelectric material pickling waste liquid. The device comprises an evaporator, the shell side of the evaporator is connected with theshell side of a preheater, the liquid outlet of the evaporator is imterconnected with the liquid inlet of a separator, the liquid outlet of the separator is interconnected with the liquid inlet of a steam saturator, the liquid outlet of the steam saturator is interconnected with the liquid inlet of a first-stage acid absorption tank, the liquid outlet of the first-stage acid absorption tank is interconnected with the liquid inlet of a second-stage acid absorption tank, the liquid outlet of the second-stage acid absorption tank is interconnected with the liquid inlet of a condenser, the liquidoutlet of the condenser is interconnected with the liquid inlet of a gas-liquid separation tank, and the liquid outlet of the gas-liquid separation tank is interconnected with the liquid inlet of a concentrate condenser. The device meets the requirements of anticorrosion, is economical and reasonable, reduces the device cost, and also has the advantages of high evaporation efficiency, continuousness and stability in production, simplicity in operation, low treatment cost and obvious environmental protection benefits.