90results about How to "Increase yield point" patented technology

The invention discloses a mechanically actuated chain wheel material, and a manufacturing method thereof. The mechanically actuated chain wheel material comprises following ingredients: 0.2 to 0.35 part of C, 0.35 to 0.55 part of Si, 0.6 to 0.9 part of Mn, Ni<=0.25 part, Cr<=0.20 part, S<=0.02 part, Al<=0.05 part, P<=0.03 part, Cu<=0.40 part, Mo<=0.05 part, V<=0.03 part, Nb<=0.01 part, Ti<=0.01 part, and the balance Fe. The manufacturing method comprises steps of (a) drawing; (b) material preparaing; (c) compacting and shaping; (d) sintering; (e) cooling; (f) rough machining; (g) gear hobbing processing; and (h) heat processing. According to the manufacturing method, the ingredients above are selected so as to obtain chain wheels with uniform strength. In preparation processes, the ingredients are delivered into a mould; a chain wheel blank material is obtained via upsetting extruding, and is subjected to sintering and cooling, so that the internal part of the mechanically actuated chain wheel material is compact, is high in strength, and is not easily fractured; gear hobbing processing is adopted, so that cost is reduced, and processing cycle is shortened; and phenolic aldehyde cloth base laminates are used, so that wear resistance and corrosion resistance of the chain wheels are increased.

The invention relates to a manufacturing method for a cold drawn welded pipe used for hydraulic oil cylinders. The manufacturing method includes the steps of: longitudinal shearing, roll bending formation, high-frequency welding, weld joint treatment, sizing, online eddy current flow detection, stress relief annealing, pre-straightening treatment, pipe cutting, normalizing air cooling treatment, pinching, pickling treatment, phosphating treatment, saponification treatment, cold-drawing, induction furnace quenching treatment, box type furnace tempering treatment, straightening treatment, fine boring rolling, magnetic leakage flaw detection, and pipe cutting measurement. The product obtained by the method provided by the invention has the advantages of high yield strength, high tensile strength, precise size, smooth surface, fast machine shaping speed, high yield, and remarkably improved manufacturing precision. The cold drawn welded pipe has good surface smoothness and low roughness, the follow-up gold processing amount is reduced, the steel utilization is improved, the manufacturing cost is lowered, and energy saving and environmental protection are promoted.

The invention provides a method for preparing a foamed aluminum composite material, relates to the manufacturing of alloy with open or closed pores, and specifically relates to a method for compounding dispersed embedded manganese particles and closed-pore foamed alumium. The method comprises the following steps of: smelting commercially pure alumium into alumium melt and preserving heat, tackifying the alumium melt, adding manganese particles, foaming the alumium melt with manganese and preserving heat, cooling in air so that the foamed alumium is solidified and formed, and then cooling by wind, thereby obtaining the closed-pore foamed alumium composite material high in compression strength, and high in porosity and ductile fracture finally. The method provided by the invention overcomes the shortcomings of low compression strength of the commercially pure alumium-based foamed alumium composite material prepared by the prior art and easy brittle fracture in the compression process.

The invention relates to a textile fuzzing flexible card clothing steel wire rod and belongs to the technical field of the special steel wire rods. The wire rod meets the conditions that the tensile strength is 1000-1200 Mpa, and the reduction of area is greater than 45%; a microstructure of the steel wire rod meeting the tensile property comprises 85% or more of the sorbite content and the balance ferrite; the sorbite interlamellar spacing is uniformly controlled, wherein the interlamellar spacing is stable at 0.08-0.20 [mu]m; nonmetallic inclusions in the wire rod are evaluated according toGB/T10561; Ds type inclusions are stable at 0.5 level or less, and the deep drawing of the wire rod can be met; and the wire rod with the diameter of 5.5 mm can be drawn into a thin steel wire with the diameter of 0.2 mm, and then quenched and tempered into a flexible card clothing.

The invention discloses an F304/F304L double-standard stainless steel flange. The F304/F304L double-standard stainless steel flange comprises a through hole and a flange plate. The flange plate is of a disc structure, the through hole is formed perpendicular to the flange plate with the center axis of the flange plate serving as the center line, and the edges of the two ends of the through hole are provided with a boss and a groove respectively. The flange plate comprises a front flange plate body, a middle flange plate body and a rear flange plate body which are sequentially arranged in parallel, the diameters of the front flange plate body, the middle flange plate body and the rear flange plate body are equal, the thicknesses of the front flange plate body and the rear flange plate body are equal, at least four fixing holes are evenly formed in each flange plate body, the hole diameters of the front fixing holes, the middle fixing holes and the rear fixing holes are equal, and the positions of the front fixing holes, the middle fixing holes and the rear fixing holes correspond. The invention further discloses a production process of the F304/F304L double-standard stainless steel flange. The F304/F304L double-standard stainless steel flange is high in rigidity and strength, resistant to corrosion, ingenious in structural design, high in practicality and long in service life.

The invention discloses a preparation method of a composite material of epoxy resin and closed-cell foamed aluminum, and relates to a composite material which is formed by a high polymer material and a foamed metal material. The preparation method comprises the following steps of: degreasing and decontaminating closed-cell foamed aluminum pieces by using 0.1mol/L of sodium hydroxide alkali liquid; neutralizing the alkali liquid on the closed-cell foamed aluminum pieces by using 0.01mol/L of hydrochloric acid; mixing the epoxy resin E-44 and a curing agent according to a mass ratio of 1:1; proportioning the closed-cell foamed aluminum pieces and the epoxy resin with the curing agent in a mold in a water bath at 70 DEG C according to a volume ratio of 1:1 or 3:1; after bubbles float up, taking out the mold from the water bath; standing for one week at normal temperature so as to obtain a dispersed embedded type epoxy resin and closed-cell foamed aluminum material. By utilizing the method, the defects that the conventional foamed aluminum-based composite material is low in yield strength, resource and energy are wasted in production, the cost is high and the environment can be polluted, are solved.

The invention relates to a manufacturing method of a cold drawn welded pipe for a precision oil cylinder. The manufacturing method comprises the following steps: longitudinal shearing, rolling forming, high-frequency welding, tensioning, online eddy current inspection, stress relief annealing, normalizing air cooling treatment, pre-straightening treatment, pipe cutting, pinching, acid washing treatment, phosphating treatment, saponification treatment, cold drawing, induction furnace quenching treatment, tempering treatment in a box type furnace, straightening treatment, honing, magnetic leakage inspection and pipe cutting measurement. A product obtained by the method has the advantages of high yield strength, high tensile strength, precise size, smooth surface, high processing and forming speed, high yield, obviously improved manufacturing precision, good surface smoothness of the cold drawn welded pipe, low roughness, reduced subsequent gold processing, improved utilization rate of steel, reduced manufacturing cost and capability of promoting energy conservation and environmental protection.

The invention provides a heat treatment technology for stainless steel workpieces. The heat treatment technology comprises the following steps: quenching, heating a stainless steel workpiece to 930-960 DEG C, keeping the temperature for 2.5-3.5 h, oil-cooling the stainless steel workpiece, and taking out the stainless steel workpiece when surface temperature of the stainless steel workpiece is less than or equal to 110 DEG C; carrying out medium-temperature tempering, putting the quenched stainless steel workpiece into a heating furnace and heating to 400-450 DEG C, keeping the temperature for 8-10 h, taking out the stainless steel workpiece and air-cooling the workpiece to room temperature. According to the stainless steel heat-treatment technology, oil quenching is carried out after heating so as to reduce stress generated during the cooling and avoid deformation and simultaneously enhance surface hardness of the stainless steel workpiece. Through medium-temperature tempering, a tempered troostite is obtained, and high elasticity and yield point and proper toughness are achieved.

The invention discloses steel for a heavy-duty loader tire protecting chain and a production method thereof. The steel is composed of, by mass, 0.35-0.42% of C, 0.70-1.10% of Si, 0.85-1.20% of Mn, 0.035% P or less, 0.035% of S or less, 0.40-0.60% of Cr, 0.008-0.015% of Tal and the balance Fe and inevitable impurities. The protecting chain utilizes Si element to significantly improve the steel yield point, tensile strength, the quenching temperature, the hardenability, the corrosion resistance and antioxidant capacity through combining with Cr element; Mn element is utilized to improve the hardenability and refine a pearlite; Cr element is utilized to slow down the decomposition speed of an austenite, improve the hardenability, promote formation of a passive film on the surface of steel and improve the corrosion resistance of the steel; and Al element is utilized to reduce the sensitivity of the steel to a gap, refine the natural steel grain and increase the temperature of grain coarsening. According to the steel for the heavy-duty loader tire protecting chain and the production method thereof, the Rockwell hardness reaches to 55 or more, wear resistance is good, a converter and continuous casting production can be used, adding of precious metal elements is not needed, and cost is low.

The invention discloses a high-strength impact-resistance type steel used for shelf beam, which comprises the following chemical components by weight percentage: 0.13-0.28% of C, 0.20-0.30% of Si, 0.20-0.46% of Mn, 0.85-0.95% of Cr, 0.28-0.32% of Ti, 0.16-0.22% of Mo, 0.24-0.36% of Nb, 0.05-0.07% of Cu, 0.18-0.36% of V, 0.59-0.79% of Al, 0.25-0.32% of rare earth trace element and the balance of Fe and impurity; the rare earth trace element comprises the following chemical components by mass percentage: 2-4% of Nd, 4-8% of Ce, 3-5% of Er, 2-6% of Pr, 1-4% of Pm, 0-5% of Dy, and the balance of La; the total content of impurity is less than or equal to 0.2, wherein, P is less than or equal to 0.005%, S is less than or equal to 0.007%, H is less than or equal to 0.004%, N is less than or equal to 0.006%, and O is less than or equal to 45ppm. The steel processing technology comprises the following steps: feeding, electroplating, drawing, annealing, insulating, pickling, drying and warehousing. The invention also designs a processing technology of the high-strength impact-resistance type steel used for shelf beam. The high-strength impact-resistance type steel used for shelf beam can obviously increase the wear-resistant compact-resistant capability of the steel, and has the advantages of simple operation technology, energy saving and environmental protection.

The invention discloses a combined solar photovoltaic module frame. The combined solar photovoltaic module frame comprises a main body frame; the main body frame is composed of a long frame, a short frame and a U-shaped fixing block; the long frame and the short frame are matched; the short frame is composed of a first concave profile, fixing edges and a first connection block; the fixing edges are arranged at two ends of the first concave profile; the first connection block is formed by extension from one side of the first concave profile; a first groove and a glue injecting groove are also arranged at the notch of the first concave profile; locating holes are also arranged at two ends of the first concave profile; a fixing block is also arranged on the fixing edge; the long frame mainly comprises a second concave profile; a second groove is arranged at the notch of the second concave profile; extension plates extend from two ends of the second concave profile; a locating column is arranged on the extension plate; and a fixing hole is also formed on the side surface of the extension plate. The invention further designs a production process of the combined solar photovoltaic module frame. The aluminium frame is simple in structure, good in protection performance, low in cost and convenient to disassemble and install; furthermore, the aluminium frame can be individually used; and furthermore, multiple aluminium frames can be used in a combined manner.

The invention discloses a machining technology of cold rolled alloy flat steel. The machining technology of cold rolled alloy flat steel comprises the process steps of heat treatment, shot blasting, cold rolling, phosphorus saponification treatment, cold drawing, secondary heat treatment, secondary cold drawing, packaging and the like, wherein the carbon content of a raw material is 1.5-2.3%; thecold rolled alloy flat steel has high forming speed and high yield, does not damage a coating, and can be made into various cross-sectional forms to meet the requirements of using conditions; and coldrolling can cause large plastic deformation of the steel, so that the yield point of the steel is improved.

The invention discloses steel for high-strength wear-resisting type ball grinder steel balls. The steel comprises, by weight, 0.9%-1.0% of C, 0.2%-0.4% of Si, 0.8%-1.2% of Mn, 1.0%-1.3% of Cr, 0.15%-0.23% of W, 0.04%-0.10% of Ti, 0-0.03% of P, 0-0.03% of S, and the balance Fe and a small number of impurities. The preparation method includes the steps that S1, smelting is performed, the W, Fe, Cr and Ti are smelted at first, and smelted molten steel is obtained; S2, refining is conducted, the smelted molten steel is transferred into a refining furnace, the C, Si, Mn, P and S and a refining agent are added for primary refining, and then the vacuum degassing and desulfuration procedures are carried out, so that refined liquid is obtained; and S3, the refined liquid is placed into a continuous casting machine, a casting blank is obtained by forming, cooling and cutting, and then the casting blank is subjected to rough rolling and finish rolling procedures so that the steel for the high-strength wear-resisting type ball grinder steel balls can be obtained. According to the steel, strength and hardness are high, the wear-resisting property is also high, and the service life is long; and purity is high, the degassing and desulfuration speed is also high, and the effect is good.

The invention discloses a tube shell type slide oil fresh water cooler for a ship. The tube shell type slide oil fresh water cooler comprises, by mass percentage, 0.18% to 0.20% of C, 0.84% to 0.88% of Mn, 0.13% to 0.17% of Si, 0.002% to 0.003% of P, 0.001% to 0.0015% of S, 0.09% to 0.11% of Nb, 0.02% to 0.04% of W, 0.21% to 0.23% of Ti, 0.45% to 0.65% of Al, 0.96% to 0.98% of Cu, 0.75% to 0.79% of Cr, 0.06% to 0.08% of Mo, 0.71% to 0.73% of rare earth elements, and the balanced Fe and inevitable impurities. The invention further discloses the tube shell type slide oil fresh water cooler for the ship and a manufacturing method of the tube shell type slide oil fresh water cooler. The tube shell type slide oil fresh water cooler is resistant to high temperature and acid and alkali corrosion, not prone to rusting and aging, and long in service life.

The invention belongs to the field of electrode flat steel for aluminum electrolysis industry, and discloses low-cost high-conductivity electrode flat steel and a smelting method thereof. The low-costhigh-conductivity electrode flat steel contains, by weight: less than or equal 0. 005% of C, less than or equal 0.05% of Si, less than or equal 0.15% of Mn, less than or equal 0.02% of P, less than or equal 0.01% of S, and the balance Fe. The smelting method comprises the following steps: converter smelting, LF refining, RH refining of molten steel, and rolling forming. The electrode flat steel has lower cost and higher conductivity, and the resistivity delta is less than or equal to 12*10<-8> omega.m (20 DEG C). The low-cost and high-conductivity flat steel is used as a cathode material of aluminum electrolysis process, and can greatly save electric energy in the production process, greatly reduce production cost of aluminum electrolysis, and achieve the optimum combination of low cost and high performance. The smelting method can accurately control content of each component in the flat steel, and reduce crystal defects under the premise of satisfying mechanical properties and processing performance; electric resistance is reduced to the greatest extent; and electrical conductivity is improved.

The invention discloses an impact-resisting high-strength alloy material for a partition wall of a bearing warehouse. The alloy material comprises the following components in percentage by mass: 0.31-0.43 percent of C, 0.29-0.35 percent of Mn, 0.11-0.13 percent of Si, 0.15-0.21 percent of Nb, 0.01-0.03 percent of W, 0.18-0.36 percent of V, 0.54-0.56 percent of Ti, 0.031-0.043 percent of Y, 2.17-3.19 percent of Al, 0.08-0.12 percent of Cu, 0.28-0.32 percent of Ni, 0.18-0.22 percent of Nb, 0.85-0.95 percent of Cr, 0.17-0.25 percent of Mo, 0.25-0.32 percent of rare-earth trace elements and the balance of Fe and unavoidable impurities, wherein the total content of the impurities is smaller than or equal to 0.2%; the content of P is smaller than or equal to 0.004%; the content of S is smaller than or equal to 0.006%; the content of H is smaller than or equal to 0.004%; the content of N is smaller than or equal to 0.006%; the content of O is smaller than or equal to 35ppm; the mass percentage of chemical components of the rear-earth trace elements is as follows: 2-4 percent of Nd, 4-8 percent of Ce, 2-6 percent of Pr, 1-4 percent of Pm, 0-5 percent of Dy and the balance of La. The invention also discloses a processing technique of the impact-resisting high-strength alloy material for the partition wall of the bearing warehouse. The alloy material disclosed by the invention is high in strength, high in toughness, excellent in processability, resistant to high temperature, resistant to corrosion, unlikely to abrade and long in service life.

The invention discloses a high-strength alloy material for a goods shelf bearing grid. The alloy material is prepared from the following components in percentage by mass: 0.21-0.23% of C, 0.19-0.25% of Mn, 0.11-0.13% of Si, 0.003-0.005% of P, 0.001-0.003% of S, 0.045-0.047% of Nb, 0.01-0.03% of W, 0.54-0.56% of Ti, 0.011-0.013% of Sr, 0.17-0.19% of Al, 0.08-0.12% of Cu, 0.08-0.12% of Nb, 0.85-0.95% of Cr, 0.07-0.13% of Mo, 0.08-0.10% of lanthanum, 0.05-0.07% of neodymium, 0.01-0.03% of cerium and the balance of Fe and inevitable impurities. The invention further discloses a processing process for the high-strength alloy material for the goods shelf bearing grid. The high-strength alloy material is high in product strength, strong in toughness, excellent in processing performance, high-temperature-resistant, corrosion-resistant, less in abrasion possibility and long in service life.

The invention discloses a corrosion-resisting and high-strength aluminum alloy outer cover material used for an air purifier. The corrosion-resisting and high-strength aluminum alloy outer cover material is characterized by comprising the following raw materials including, by weight, 1.25-1.29 parts of silicon, 1.76-1.78 parts of zinc, 1.42-1.46 parts of magnesium, 0.56-0.58 part of germanium, 0.14-0.16 part of chromium, 0.66-0.68 part of iron, 3.58-3.78 parts of titanium, 1.06-1.08 parts of nickel, 0.87-0.89 part of antimony, 3.87-3.97 parts of a rare earth mixture and 45-50 parts of aluminum. The corrosion-resisting and high-strength aluminum outer cover material used for the air purifier is high in strength, good in corrosion resistance, small in mass, not likely to age and deform, not likely to change colors and resistant to corrosion. Meanwhile, the invention provides a preparing method for the corrosion-resisting and high-strength aluminum alloy outer cover material used for the air purifier, the material cost is low, raw materials are easy to obtain, the technology is simple, and high practical value and good application prospects are achieved.