33results about How to "Consolidate the technical effect" patented technology

The invention discloses a more than 630MPa level high strength steel bar comprising the following components: by weight, 0.28%-0.38% of carbon, 0-0.35% of silicon, 0-0.90% of manganese, 0.80%-1.50% of Cr, 3.00%-4.00% of nickel, 0.40%-0.60% of molybdenum, 0-0.015% of P, 0-0.015% of sulfur, 0-2.0ppm of hydrogen, 0.10%-0.20% of vanadium, 0-0.025% of titanium, 0-0.20% of copper, 0-0.05% of aluminum, 0-0.50% of residual elements and the balance of Fe; the invention also designs an application method of the more than 630MPa level high strength steel bar in reinforced concrete; and the more than 630MPa level high strength steel bar has the advantages of high strength, steel saving, no pollution, good hardenability, low tendency to crack and low relaxation degree.

The invention discloses a production method for a thermal treatment prestressed steel strand. According to the production method for the thermal treatment prestressed steel strand, AISI4340MOD steel is selected as raw materials and theAISI4340MOD steel comprises the following componentsby mass percent, 0.3 to 0.32 % of carbon, 0.18 to 0.36 % of silicon, 0.50 to 0.70 % of manganese, 0.90 to 1.10 % of chromium, 0.20 to 0.30 % of molybdenum, 0 to 0.02 % of phosphorus, 0 to 0.025 % of sulfur, 0 to 1.8 ppm of hydrogen, 0 to 0.40 % of nickel, 0 to 0.03 % of vanadium, 0 to 0.30 % of copper, 0 to 0.9 % of residual elements and the remaining is ferrum. The production method for the thermal treatment prestressed steel strand has the advantages of improving the strength and hardenability of the steel strand, enabling the steel strand to be not easy to craze, low in looseness, uniform and smooth in surficial galvanization.

The invention relates to a reinforced bar and a production process thereof, and specifically relates to a 630 MPa-grade high-strength hot-rolled reinforced bar and a production process thereof. The 630 MPa-grade high-strength hot-rolled reinforced bar comprises the following chemical components in percentage by weight: 0.38%-0.43% of C, 0.8%-1.1% of Cr, 0.75%-1.0% of Mn, 0.15%-0.25% of Mo, 0.15%-0.3% of Si, less than 0.035% of S, less than 0.035% of P, less than 0.035% of Na and the balance of Fe. The yield strength of the reinforced bar disclosed by the invention can reach 630 Mpa, has the advantages of high strength, good ductility, strong anti-lagging breakage, steel saving, low relaxation, welding easiness, good upsetting performance and the like; carbides can be sufficiently dissolve and uniformly diffuse, thereby avoiding intercrystalline corrosion and overhigh point corrosion due to intercrystalline precipitation of carbides.

The invention discloses a processing method of an above-600MPa-grade high-strength steel bar connection sleeve. The sleeve selects No.45 round steel as a raw material, and the No.45 round steel comprises 0.38-0.43wt% of C, 0.8-1.1wt% of Cr, 0.75-1.0wt% of Mn, 0.15-0.25wt% of Mo, 0.15-0.3wt% of Si, below 0.035% of S, below 0.035wt% of P, below 0.035wt% of N, and the balance Fe. The designed processing method of the above-600MPa-grade high-strength steel bar connection sleeve substantially improves the tensile strength and the elongation rate, guarantees the external diameter dimension and fineness of a steel tube, and reduces the friction stress between a tap and the inner wall of the sleeve.

The invention relates to a reinforcement bar and a production technology thereof, in particular to a high-strength hot-rolled reinforcement bar of the 830 MPa level, and a production technology of the reinforcement bar. The reinforcement bar comprises the following chemical components by weight: 0.38 to 0.43% of C, 0.7 to 0.9% of Cr, 0.6 to 0.8% of Mn, 0.15 to 0.25% of Mo, 0.2 to 0.3% of Si, 1.6 to 2% of Ni, 0.035% of S, 0.035% of P, 0.035% of N and the balance of Fe. The shear strength of the reinforcement bar can reach 830 MPa; the reinforcement bar has the advantages of high strength, good ductility, high lagging and fracture resistance, economy of steel material, underrelaxation, easiness in welding, high upset performance and the like, can enable carbide to dissolve fully and diffuse uniformly, and avoids that intercrystalline corrosion and pitting exceeding are caused due to intercrystalline separation of carbide.

The present invention discloses a chromium-molybdenum low-alloy zinc-plating steel strand manufacturing method, wherein the chromium-nickel-molybdenum alloy structure steel comprises, by mass, 0.28-0.38% of carbon, 0-0.35% of silicon, 0-0.90% of manganese, 0.80-1.50% of chromium, 3.00-4.00% of nickel, 0.40-0.60% of molybdenum, 0-0.015%of phosphorus, 0-0.015% of sulfur, 0-2.0 ppm of hydrogen, 0.10-0.20% of vanadium, 0-0.025% of titanium, 0-0.20% of copper, 0-0.05% of aluminum, 0-0.50% of residual elements, and the balance of Fe. According to the chromium-molybdenum low-alloy zinc-plating steel strand manufacturing method designed by the present invention, the prepared chromium-molybdenum low-alloy zinc-plating steel strand has characteristics of high strength, good hardenability good, cracking resistance, low relaxation degree, and smooth and uniform surface zinc plating.

The present invention discloses a chromium-molybdenum low-alloy prestress aluminum-cladding steel wire manufacturing method, wherein the chromium-nickel-molybdenum alloy structure steel is adopted as a billet material and comprises, by mass, 0.28-0.38% of carbon, 0-0.35% of silicon, 0-0.90% of manganese, 0.80-1.50% of chromium, 3.00-4.00% of nickel, 0.40-0.60% of molybdenum, 0-0.015%of phosphorus, 0-0.015% of sulfur, 0-2.0 ppm of hydrogen, 0.10-0.20% of vanadium, 0-0.025% of titanium, 0-0.20% of copper, 0-0.05% of aluminum, 0-0.50% of residual elements, and the balance of Fe. According to the chromium-molybdenum low-alloy prestress aluminum-cladding steel wire manufacturing method designed by the present invention, strength and toughness of the steel wire can be substantially increased, a corrosion resistance degree of the steel wire can be enhanced, and a service life can be prolonged.

The invention discloses a manufacture method for a valve core of a stop valve used in fermentation. According to the invention, Cr-Mo low alloy steel is adopted as a blank, and the Cr-Mo low alloy steel comprises the following components in percentage by mass: 0.3%-0.31% of carbon, 0.18%-0.36% of silicon, 0.50%-0.70% of manganese, 0.90%-1.10% of chromium, 0.20%-0.30% of molybdenum, 0-0.02% of phosphorus, 0-0.025% of sulfur, 0-1.8 ppm of hydrogen, 0-0.40% of nickel, 0-0.03% of vanadium, 0-0.30% of copper, 0-0.9% of residual elements and the balance of Fe, and the valve core is obtained by coating polytetrafluoroethylene upon the blank through a wet method. According to the invention, the valve core of the stop valve used in fermentation, obtained through adopting the designed manufacture method provided by the invention is good in toughness and has an excellent corrosion resistance and antibacterial property.

The invention discloses a treatment process of an aluminum-clad metal wire for high-strength shelf back mesh. A selected steel blank comprises the following chemical components in percent by weight: 0.03-0.08% of C, 0.20-0.30% of Si, 0.20-0.46% of Mn, 0.85-1.0% of Cr, 0.16-0.22% of Mo, 0.015-0.030% of N, 0.05-2% of Cu, 0.02-0.10% of Ce, 0.02-0.10% of La, 0.04-0.05% of P, 0.03-0.04% of S, 0.01-0.25% of Nb, 0.18-0.36% of V, 4.8-5.9% of Al and the balance of Fe and impurities. During sectional material processing, the working procedures including feeding, drawing, electroplating, annealing, heat preserving, coating, acid pickling, drying and warehousing are sequentially performed. The treatment process of the aluminum-clad metal wire for the high-strength shelf back mesh, which is designed by the invention, has the advantages that the overall performance, such as mechanical strength and corrosion resistance, of alloy metal wires and back mesh finished-products can be improved, and the service life of the back mesh is greatly prolonged.

The invention discloses an alloy material for a high-strength steel pull rod and a treatment technology thereof. A nickel element is added; the strength and the toughness of the steel pull rod are improved; the hardenability and the corrosion resistance are improved; the atomic activities of a C element and an N element are improved so that an air mass formed by each atom can form a strong interaction with dislocation. Meanwhile, in the treatment process, a vacuum degasification furnace is used for performing degasification; die casting is protected by argon gas so that an air hole is avoided in a product and the quality of the product is further improved. The alloy material for the high-strength steel pull rod and the treatment technology thereof designed by the invention overcome the defect of the prior art and have the advantages of high strength, no pollution, good hardenability, difficulty to crack and low looseness.

The invention discloses a processing method for a chrome molybdenum low alloy prestressed steel reinforcement connection joint. Chrome-nickel-molybdenum low alloy structural steel serves as a blank, the percentage by weight of nickel is controlled to range from 3.00% to 4.00%, and the percentage by weight of chrome is controlled to range from 0.80% to 1.50%; through hydrogen diffusion heat treatment, under the premise that the hydrogen content of the blank is lower than 2.0 ppm, the hydrogen content is further reduced, the situation that white point cracks of the blank and heat treatment stress induce hydrogen induced cracks and hydrogen induced delay cracks is avoided, the toughness, elasticity, abrasive resistance and impact resistance of the steel are improved, and the steel is compact. Through the processing method for the chrome molybdenum low alloy prestressed steel reinforcement connection joint, the strength, toughness and tension stress of the steel reinforcement connection joint can be greatly improved, the corrosion resistance of the steel reinforcement connection joint can be enhanced, and the service life of the steel reinforcement connection joint can be prolonged.

The invention relates to a reinforcement bar and a production technology thereof, in particular to a high-strength hot-rolled reinforcement bar of the 730 MPa level, and a production technology of the reinforcement bar. The reinforcement bar comprises the following chemical components by weight: 0.48 to 0.53% of C, 0.8 to 1.1% of Cr, 0.75 to 1.0% of Mn, 0.15 to 0.25% of Mo, 0.15 to 0.3% of Si, 0.035% of S, 0.035% of P, 0.035% of N and the balance of Fe. The shear strength of the reinforcement bar can reach 730 Mpa; the reinforcement bar has the advantages of high strength, good ductility, high lagging and fracture resistance, economy of steel material, underrelaxation, easiness in welding, high upset performance and the like, can enable carbide to dissolve fully and diffuse uniformly, and avoids that intercrystalline corrosion and pitting exceeding are caused due to intercrystalline separation of carbide.

The invention relates to a steel bar and its production process, which is a 830MPa grade high-strength hot-rolled steel bar and its production process. The chemical composition in weight percentage is: C: 0.38-0.43%, Cr: 0.7-0.9%, Mn: 0.6- 0.8%, Mo: 0.15-0.25%, Si: 0.2-0.3%, Ni: 1.6-2%, S: <0.035%, P: <0.035%, N: <0.035%, and the balance is Fe. The steel bar yield strength of the present invention can reach 830MPa, has the advantages of high strength, good ductility, strong hysteresis fracture resistance, steel saving, low relaxation, easy welding, good upsetting performance, etc., and can fully dissolve carbides and evenly diffuse, It avoids the precipitation of carbides between grains and causes excessive intergranular corrosion and pitting corrosion.

The present invention discloses a AISI4340 prestress steel bar manufacturing method, wherein a AISI4340MOD steel is adopted as a billet material, the billet material is subjected to smelting and finish rolling to obtain a prestress steel bar forging stock with the required size, the prestress steel bar forging stock is sequentially subjected to a hydrogen diffusion heat treatment, rough processing, water cooling quenching and air cooling quenching, a polyethylene corrosion resistance coating is coated on the outer surface of the steel bar forging stock, and a polyethylene heat shrink sleeve is arranged outside the polyethylene corrosion resistance coating. According to the AISI4340 prestress steel bar manufacturing method designed by the present invention, the obtained AISI4340 prestress steel bar has characteristics of high strength, good ductility, strong delayed fracture resistance, steel saving, low relaxation, easy welding, good upsetting property and the like, and further has effects of substantially enhanced corrosion resistance sealing property, and effectively improved mechanical strength.

The present invention discloses 600 MPa-grade-and-above high strength steel bars and a reinforced concrete application method thereof. According to the present invention, 0.4-0.65% by weight of Mn, 0.6-0.7% by weight of Cr, 0.15-0.3% by weight of Mo, 0.5-0.65% by weight of Ni, and 0.25-0.4% by weight of V are added to the steel bar component so as to improve strength, toughness, corrosion resistance, wear resistance and impact resistance of the steel bar, make the steel bar be compact, improve hardenability of the steel, and improve atom activities of the elements such as C and N, such that deformation and cracking can be reduced; and the application method of the diameter 6 mm and diameter 22 mm 600 MPa-grade-and-above high strength steel bars in the reinforced concrete has advantages of steel bar consumption reduction, carrying capacity increase, and crack extension resistance.

The present invention discloses a chromium-molybdenum low-alloy prestress aluminum-cladding steel wire manufacturing method, wherein the chromium-nickel-molybdenum alloy structure steel is adopted as a billet material and comprises, by mass, 0.28-0.38% of carbon, 0-0.35% of silicon, 0-0.90% of manganese, 0.80-1.50% of chromium, 3.00-4.00% of nickel, 0.40-0.60% of molybdenum, 0-0.015%of phosphorus, 0-0.015% of sulfur, 0-2.0 ppm of hydrogen, 0.10-0.20% of vanadium, 0-0.025% of titanium, 0-0.20% of copper, 0-0.05% of aluminum, 0-0.50% of residual elements, and the balance of Fe. According to the chromium-molybdenum low-alloy prestress aluminum-cladding steel wire manufacturing method designed by the present invention, strength and toughness of the steel wire can be substantially increased, a corrosion resistance degree of the steel wire can be enhanced, and a service life can be prolonged.

The invention discloses a machining tool for a spherical plate. The tool comprises an upper mold and a lower mold, wherein the lower mold comprises a lower columnar structure defined through welding connection of sides of at least three lower rib plates and a seat plate arranged at the bottom of the lower columnar structure; a machining concave end surface is arranged at the top of the lower columnar structure, and the curve of the machining concave end surface is consistent with the radian of a curved surface of the to-be-machined spherical plate; the upper mold comprises an upper columnar structure defined through welding connection of sides of at least three upper rib plates and a top plate arranged at the top of the upper columnar structure; and a machining convex end surface is arranged at the lower end of the upper columnar structure and is matched with the machining concave end surface in radian. The smooth degree of the appearance of the plate can be guaranteed with the tool, assembly, electric welding and polishing in following processes can be reduced, the manufacturing period of the spherical plate can be shortened, and the manufacturing cost of the spherical plate can be saved.

The invention discloses a preparation process of an aluminum iron alloy wire. The aluminum iron alloy wire is prepared by wrapping the outer surface of an alloy wire with aluminum, and the preparation process is prepared from the following chemical components in percentage by weight: 40-60% of aluminum, 35-55% of ferrum, 0.15-0.2% of carbon, 0.15-0.2% of silicon, 0.02-0.03% of phosphorus, 0.03-0.04% of sulfur, 0.04-0.05% of copper, 3.0-5.0% of cerium, less than or equal to 1.8PPm of hydrogen, less than or equal to 75PPm of nitrogen, less than or equal to 18PPm of oxygen and the balance being impurities. By using the preparation process of the aluminum iron alloy wire, designed by the invention, the quality can be greatly improved, the whole process is simple and easy to implement, and the yield of the aluminum is increased.

The invention discloses a manufacture method for a valve core of a stop valve used in fermentation. According to the invention, Cr-Mo low alloy steel is adopted as a blank, and the Cr-Mo low alloy steel comprises the following components in percentage by mass: 0.3%-0.31% of carbon, 0.18%-0.36% of silicon, 0.50%-0.70% of manganese, 0.90%-1.10% of chromium, 0.20%-0.30% of molybdenum, 0-0.02% of phosphorus, 0-0.025% of sulfur, 0-1.8 ppm of hydrogen, 0-0.40% of nickel, 0-0.03% of vanadium, 0-0.30% of copper, 0-0.9% of residual elements and the balance of Fe, and the valve core is obtained by coating polytetrafluoroethylene upon the blank through a wet method. According to the invention, the valve core of the stop valve used in fermentation, obtained through adopting the designed manufacture method provided by the invention is good in toughness and has an excellent corrosion resistance and antibacterial property.

The invention discloses a 600MPa grade-and-more high-strength building steel bar and a duct piece application method thereof. The high-strength steel bar comprises 0.32-0.7wt% of C, 0.5-1.2wt% of Ni, 0.3-2.1wt% of Cr, 0.6-1.3wt% of Si, 0.4-0.8wt% of Mn, 0.6-0.7wt% of Cr, 0.12-0.28wt% of Mo, 0.3-0.55wt% of Ni, 0.2-0.3wt% of V, below 0.05wt% of S, below 0.02wt% of P, and the balance Fe. A production method of the high-strength steel bar comprises the following steps: 1, sending a steel bar into a heating furnace, and heating; 2, carrying out preliminary hot rolling of the steel bar; 3, putting the above obtained cooled steel bar in a tempering heating furnace, and heating to 500-550DEG C; 4, carrying out high pressure injection of the obtained heat-insulated steel bar with water or a quenching liquid; and 5, carrying out examination warehousing. The high-strength steel bar has the advantages of strong bearing capacity, security improvement, reduction of the consumption of the steel bar, and cost reduction.

The invention relates to a steel bar and its production process, which is a 730MPa grade high-strength hot-rolled steel bar and its production process. The chemical composition in weight percentage is: C: 0.48-0.53%, Cr: 0.8-1.1%, Mn: 0.75- 1.0%, Mo: 0.15-0.25%, Si: 0.15-0.3%, S: <0.035%, P: <0.035%, N: <0.035%, and the balance is Fe. The steel bar yield strength of the present invention can reach 730Mpa, has the advantages of high strength, good ductility, strong hysteresis fracture resistance, steel saving, low relaxation, easy welding, good upsetting performance, etc., and can fully dissolve carbides and evenly diffuse, It avoids the precipitation of carbides between grains and causes excessive intergranular corrosion and pitting corrosion.

The present invention discloses a AISI4340 prestress steel bar manufacturing method, wherein a AISI4340MOD steel is adopted as a billet material, the billet material is subjected to smelting and finish rolling to obtain a prestress steel bar forging stock with the required size, the prestress steel bar forging stock is sequentially subjected to a hydrogen diffusion heat treatment, rough processing, water cooling quenching and air cooling quenching, a polyethylene corrosion resistance coating is coated on the outer surface of the steel bar forging stock, and a polyethylene heat shrink sleeve is arranged outside the polyethylene corrosion resistance coating. According to the AISI4340 prestress steel bar manufacturing method designed by the present invention, the obtained AISI4340 prestress steel bar has characteristics of high strength, good ductility, strong delayed fracture resistance, steel saving, low relaxation, easy welding, good upsetting property and the like, and further has effects of substantially enhanced corrosion resistance sealing property, and effectively improved mechanical strength.

The invention discloses a midair multipoint vertical steel bar connecting joint which is made of number 45 round steel. The round steel comprises the chemical components, by weight, 0.38-0.43% of C, 0.8-1.1% of Cr, 0.75-1.0% of Mn, 0.15-0.25% of Mo, 0.15-0.3% of Si, 0.035% of S, 0.035% of P, 0.035% of N, and the balance Fe. The invention further discloses a construction method of the midair multipoint vertical steel bar connecting joint. The midair multipoint vertical steel bar connecting joint and the construction method thereof are simple and practical, simple in construction and capable of greatly improving the strength, the toughness and the tension stress of the steel bar connecting joint.

The invention discloses a production method for a thermal treatment prestressed steel strand. According to the production method for the thermal treatment prestressed steel strand, AISI4340MOD steel is selected as raw materials and theAISI4340MOD steel comprises the following componentsby mass percent, 0.3 to 0.32 % of carbon, 0.18 to 0.36 % of silicon, 0.50 to 0.70 % of manganese, 0.90 to 1.10 % of chromium, 0.20 to 0.30 % of molybdenum, 0 to 0.02 % of phosphorus, 0 to 0.025 % of sulfur, 0 to 1.8 ppm of hydrogen, 0 to 0.40 % of nickel, 0 to 0.03 % of vanadium, 0 to 0.30 % of copper, 0 to 0.9 % of residual elements and the remaining is ferrum. The production method for the thermal treatment prestressed steel strand has the advantages of improving the strength and hardenability of the steel strand, enabling the steel strand to be not easy to craze, low in looseness, uniform and smooth in surficial galvanization.

The invention discloses a processing method of an above-600MPa-grade high-strength steel bar connection sleeve. The sleeve selects No.45 round steel as a raw material, and the No.45 round steel comprises 0.38-0.43wt% of C, 0.8-1.1wt% of Cr, 0.75-1.0wt% of Mn, 0.15-0.25wt% of Mo, 0.15-0.3wt% of Si, below 0.035% of S, below 0.035wt% of P, below 0.035wt% of N, and the balance Fe. The designed processing method of the above-600MPa-grade high-strength steel bar connection sleeve substantially improves the tensile strength and the elongation rate, guarantees the external diameter dimension and fineness of a steel tube, and reduces the friction stress between a tap and the inner wall of the sleeve.

The present invention discloses a chromium-molybdenum low-alloy zinc-plating steel strand manufacturing method, wherein the chromium-nickel-molybdenum alloy structure steel comprises, by mass, 0.28-0.38% of carbon, 0-0.35% of silicon, 0-0.90% of manganese, 0.80-1.50% of chromium, 3.00-4.00% of nickel, 0.40-0.60% of molybdenum, 0-0.015%of phosphorus, 0-0.015% of sulfur, 0-2.0 ppm of hydrogen, 0.10-0.20% of vanadium, 0-0.025% of titanium, 0-0.20% of copper, 0-0.05% of aluminum, 0-0.50% of residual elements, and the balance of Fe. According to the chromium-molybdenum low-alloy zinc-plating steel strand manufacturing method designed by the present invention, the prepared chromium-molybdenum low-alloy zinc-plating steel strand has characteristics of high strength, good hardenability good, cracking resistance, low relaxation degree, and smooth and uniform surface zinc plating.