49results about How to "Low cold brittleness" patented technology

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 provides a solid welding wire for high-toughness structural steel, which comprises the following chemical components by weight percent: C: 0.06-0.12, Si: 0.4-0.8, Mn: 1.2-2.4, Ni: 0.05-0.30, Cr: 0.15-0.30, S: not more than 0.015, P: not more than 0.020 and the balance of Fe and other unavoidable impurities. As for the solid welding wire for the high-toughness structural steel provided by the invention, yield strength for deposited metal is more than 500MPa and tensile strength is more than 600MPa; after welding, welding seams have beautiful shaping, little splash and low crack sensitivity, thus meeting the welding requirement for a low-alloy high strength steel plate; and relative to an ER55-D2Ti welding wire or a 60kg of welding wire containing Ni-Mo system, the solid welding wire of the invention lowers production cost and use cost on the premise of guaranteeing intensity and impact toughness, thus being suitable for large-scale popularization and application.

The invention provides a manufacturing process of hot work die steel for a high performance die-casting die and relates to the technical field of die steel. The manufacturing process of the hot work die steel comprises the following steps of (1) smelting; (2) high-temperature homogenization treatment; (3) forging; (4) annealing treatment; (5) quenching and tempering treatment; (6) nitriding treatment; and (7) tempering treatment. The hot work die steel is prepared from the following components in percent by weight: 0.33-0.46% of C, 1.5-2.3% of Si, 0.32-0.45% of Mn, 1.6-2.3% of Mo, 2.6-3.6% ofW, 0.16-0.27% of Nb, 2.8-3.7% of Cr, 0.21-0.53% of Sr, 0.16-0.31% of Ti, 0.05-0.09% of Ce, less than or equal to 0.003% of S, less than or equal to 0.03% of P and the balance Fe. The hot work die steel prepared by the manufacturing process has relatively high surface hardness and wear resistance, relatively good impact toughness and excellent fatigue resistance and strength, so that the service life of the hot work die steel for the die-casting die is prolonged effectively.

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 tungsten carbide coating cutter and a preparation technology thereof. The tungsten carbide coating cutter comprises a blade; a cutting edge is formed in the blade; the cutting edge is coated with a tungsten carbide coating; the blade is made of a titanium-cobalt alloy steel material; the surface of the cutting edge is completely coated with a tungsten carbide medium; andcomprehensive spot welding is conducted under spot welding equipment. According to the tungsten carbide coating cutter and the preparation technology, titanium-cobalt alloy steel is used as materialsof the blade and the cutting edge, combination of the tungsten carbide medium and the cutting edge is achieved in a spot welding mode, operation is easy, the requirement for the equipment is not high,the tungsten carbide coating is formed on the surface of the cutting edge, the strength and the abrasion resistance of the cutter can be greatly improved, and the service life of the cutter can be prolonged by five times or above; the titanium element and the cobalt element in the material of the cutting edge can be combined with tungsten carbide, the fragile characteristic of tungsten carbide can be overcome, the brittleness of the tungsten carbide coating can be reduced, the tungsten carbide coating is not prone to falling off, and compared with a common tungsten carbide coating, the cutterhas the advantages that the service life can be greatly prolonged, and the stability can be greatly 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.

A corrosion-resistant alloy steel material for a roller of a wire processing machine contains the following chemical elements by mass: 0.8-0.9 of carbon, 2.5-3 of tungsten, 1.0-1.3 of molybdenum, 1.5-2.5 of vanadium, 5.5-6.5 of chromium, 0.05-0.10 of niobium, 0.05-0.10 of holmium, 0.04-0.08 of Sn, 1.3-1.5 of Mn, not more than 0.030 of P, not more than 0.030 of S and the rest of Fe. Various alloy elements, such as the holmium, the niobium and the tungsten are added on the basis of high-carbon steel and are secondarily refined, the temperature of thermal treatment after casting is reasonably controlled, and the raw materials are fed in batches, so that the alloy steel has the properties of high-speed steel, such as high-temperature resistance, high-hardness maintenance and great rigidity and toughness fitting. The surface of the corrosion-resistant alloy steel material has great wear resistance, great peeling resistance and low cold brittleness and is resistant to cold and hot alternate corrosion. The corrosion-resistant alloy steel material is suitable for being used for the roller of the wire processing machine. The cost is low due to the low alloy element content.

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 DDQ-grade hot-rolled pickling cold-formed steel and a manufacturing method thereof, and belongs to the technical field of hot-rolled pickling cold-formed steel. The steel comprises the following chemical components including, by weight percent, smaller than or equal to 0.0020% of C, smaller than or equal to 0.03% of Si, 0.08%-0.25% of Mn, 0.005%-0.015% of P, 0.05%-0.015% ofS, 0.025%-0.045% of Als, smaller than or equal to 0.0040% of N, 0.030%-0.050% of Ti, 0.015%-0.030% of Nb, and the balance Fe and inevitable impurities. According to the steel, multiple elements are added on the basis of traditional hot-rolled cold-formed steel, the content of each element is reasonably adjusted, so that the yield strength and the tensile strength of the steel are improved to a certain extent, the ductility of the steel is well improved, meanwhile, the thickness of a steel plate meets the use requirement, and a cold-rolled steel plate is effectively replaced. According to themanufacturing method of the steel, the components, the component content and the specific production process of the steel plate are optimally designed, the yield strength and the elongation of the obtained steel plate are guaranteed, and meanwhile, the surface characteristics of the steel plate are improved through secondary pickling, so that the steel plate has high-grade roughness and surface gloss comparable with surface gloss of a cold-rolled plate.

The invention discloses a step type vertical convex bending through bridge frame. The step type vertical convex bending through bridge frame comprises symmetrically arranged groove frames and a transverse support arranged between the groove frames. The groove frames and the transverse support of the step type vertical convex bending through bridge frame are made of the same material. The material comprises the following components: C, Si, Mn, Ni, Mo, Cr, N, Cu, Al, Ti, S, P, Nb, V and a rare earth element, the balance being Fe and unavoidable impurities. The rare earth element comprises the following components: lanthanum, cerium, praseodymium, dysprosium, holmium, gadolinium and yttrium, the balance being lanthanide-series rare earth. The invention also provides a preparation method of the step type vertical convex bending through bridge frame. The preparation method is simple and easily implemented, the preparation cost is low, pollutants are not generated in a production technical process, and the prepared step type vertical convex bending through bridge frame is good in processing performance and high in strength and is highly guaranteed in quality.

The invention discloses a corrosion-resistant cast steel material for auto parts, which is made of the following raw materials in parts by weight: steel scrap (iron content not less than 98%) 95-98, Z18 pig iron 2-3, crystalline silicon 0.7-0.75, Carbon 0.3-0.35, niobium 0.04-0.05, titanium 0.4-0.5, manganese 1.2-1.3, chromium 0.04-0.05, calcium silicide 0.8-0.86, gelatin 0.2-0.23, lime powder 0.2-0.24, calcium fluoride 0.3-0.4, heavy Crystal 0.5-0.55, impurity ≤ 0.01. The invention can improve the intergranular corrosion and improve the corrosion resistance of the cast steel material by rationally configuring the ratio of element components and the production process, and adding elements such as titanium and niobium; The auto parts produced are corrosion-resistant, low-temperature resistant, and have a long service life.

The invention discloses a corrosion-resistant and weather-resistant gear ring for a gearbox coupling, and particularly relates to the technical field of coupling gear rings. The corrosion-resistant and weather-resistant gear ring comprises the following raw materials: carbon, silicon, nickel, phosphorus, titanium, chromium, vanadium, lanthanum, tungsten, molybdenum, rhenium and the balance of iron and inevitable impurities. The titanium, the chromium, the vanadium, the lanthanum, the tungsten, the molybdenum and the rhenium are added, the added titanium can form stable, dispersed, high-melting-point and high-hardness carbide with carbon in the gear ring material, the intergranular corrosion tendency in the gear ring material is eliminated, and therefore the corrosion resistance of the gear ring is improved. Meanwhile, the content of the chromium in the gear ring material is 12-18%, the strength and corrosion resistance of the gear ring can be better due to the high-content chromium element, and by adding vanadium, tungsten and molybdenum, deterioration can be purified, grains can be refined, and the wear resistance and strength of the composite plate can be improved. The produced coupling gear ring has high corrosion resistance and weather resistance, and the service life is greatly prolonged.

The invention discloses a reinforcing bar for ultralow temperature environments and relates to the technical field of reinforcing bars. The reinforcing bar comprises the following chemical components in percentage by weight: 0.04-0.07% of C, 0.18-0.3% of Si, 0.8-1.5% of Mn, less than or equal to 0.005% of S, less than or equal to 0.008% of P, 5-7.5% of Ni, 0.01-0.03% of Ti, 0.01-0.03% of Nb, 0.1-0.25% of Cu, 0.02-0.04% of Al, 0.003-0.0066% of N, 0.001-0.005% of Ca and the balance being Fe and inevitable impurities. The reinforcing bar solves the problem that a conventional low-temperature resistant reinforcing bar has a relatively poor low temperature property under the ultralow temperature environments of below minus 165 DEG C.

The present invention discloses a closed circulation water cooler, wherein the raw materials comprise, by mass, 0.102-0.104% of C, 0.053-0.055% of B, 0.001-0.003% of N, 0.34-0.36% of Mn, 0.087-0.089% of Si, 0.065-0.067% of Nb, 2.23-2.25% of Cr, 0.075-0.079% of Mo, 0.041-0.045% of W, 0.012-0.014% of V, 0.504-0.508% of Ti, 1.32-1.34% of Al, 0.41-0.43% of Cu, 0.423-0.425% of composite rare earth, and the balance of Fe and unavoidable impurities. The product of the present invention has characteristics of high temperature resistance, low temperature resistance, corrosion resistance under acid and alkali environments, rust resistance, aging resistance, and long service life.