45results about How to "Reduced weldability" patented technology

The invention mainly discloses a production process of a nuclear bolt. A 42CrMoE steel material is adopted as a raw material, and the nuclear bolt is produced by blank preparation, heat treatment, surface treatment and flaw detection, wherein the raw material of 42CrMoE comprises the following chemical components by mass percent: 0.38 to 0.48 of C, 0.10 to 0.40 of Si, 0.75 to 1.00 of Mn, no more than 0.025 of P, no more than 0.015 of S, 0.80 to 1.15 of Cr, 0.15 to 0.30 of Mo and the balance of Fe. The product obtained by production in the invention meets the requirements of nuclear 1-stage equipment, nuclear 2-stage equipment and nuclear 3-stage equipment, and the strength, the hardness and the impact resistance all reach standards.

The invention discloses an argon-rich gas-shielded welding wire of high-strength weathering steel used in railway cars, which is prepared by the following chemical components according to mass percentage: 0.2-0.35 percent of Cu, 0.3-0.7 percent of Cr, 0.2-to 0.6 percent of Ni, 0.05-0.1 percent of C, 0.3-0.5 percent of Si, 1.2-1.45 percent of Mn, P which is less than or equal to 0.015 percent, S which is less than or equal to 0.015 percent, the rest of Fe and unavoidable impurities. The welding wire is characterized by high weatherability, high strength, good flexibility, good resistance to welding cold crack, and the like, and the tensile strength thereof is more than 600MPa and the low-temperature impact property Axv is equal to or more than 146J at minus 40 DEG C. The welding wire adopts argon-rich gas as shield gas and has stabilized arcs, little splash, no air hole and good welding appearance when in welding. Furthermore, weld joints have an excellent matching effect with the high-strength weathering wheel used in the railway cars.

The invention relates to the field of third-generation advanced high-strength steel used for automobiles and discloses 1180 MPa-grade ultrahigh-strength low-cost cold-rolled quenched partition steel and a manufacturing method thereof. A steel plate comprises the chemical components including, by mass percent, 0.18-0.22% of C, 1.0-3.0% of Mn, 1.0-2.0% of Si, not greater than 0.05% of P, not greaterthan 0.02% of S, 0-0.05% of Nb, 0-0.2% of Ti and the balance iron and inevitable impurities. The steel plate manufacturing method relates to the process of steel smelting, hot rolling, cold rolling,pre-quenching and heat treatment, and finally, a ferrite-bainite-martensite-retained austenite mixed structure is obtained. According to the 1180 MPa-grade ultrahigh-strength low-cost cold-rolled quenched partition steel and the manufacturing method thereof, on the basis of traditional C-Mn-Si series quenched partition steel, Nb and Ti elements are added for refining the structure, pre-quenching treatment and a one-step partition process are adopted, finally the ultrahigh-strength quenched partition steel with the yield strength being 500-800 MPa, the tensile strength not smaller than 1180 MPa, the elongation after fracture not smaller than 20% and the product of strength and elongation not smaller than 24GPa.% is obtained, and the mechanical property is quite excellent.

The invention discloses a high-Ni-Cu alloy glass mold and a method for manufacturing the same. The high-nickel-copper alloy glass mold is prepared from the following components by mass ratio: 8.5-10.5% of Al, 14.0-16.0% of Ni, 7.5-9.5% of Zn, 0.8-1.2% of Si, 0.8-1.2% of Fe, 0.08-0.15% of Mn and the balance of Cu. The method for preparing the high-Ni-Cu alloy glass mold comprises the following steps: preparing a Zn-Cu alloy, wherein the mass ratio of Zn and Cu is 45:55, determining the use amount of the raw materials for preparing the high-Ni-Cu alloy glass mold, the Zn-Cu alloy and the electrolytic copper according to the mass ratio of the components for preparing the high-Ni-Cu alloy glass mold, smelting the raw materials and the electrolytic copper in an intermediate-frequency furnace until the temperature reaches 1,200-1,240 DEG C, adding the Zn-Cu alloy, heating until the smelting temperature reaches 1,280-1,300 DEG C, preserving temperature and casting at 1,260-1,280 DEG C, and carrying out stress-relief annealing. The high-Ni-Cu alloy glass mold disclosed by the invention has the advantages of high heat conductivity and heat resistance and good corrosion resistance and can adapt to the high-speed production requirements of the high-speed bottle making machine.

The invention discloses a corrosion-resisting rebar with the yield strength in 500 MPa grade and a production method, and belongs to the technical field of corrosion-resisting steel for construction.The rebar comprises, by weight, the chemical components including 0.05-0.10% of C, 0.30-0.60% of Si, 1.20-1.50% of Mn, 1.00-1.50% of Cr, 0.10-0.20% of Ni, 0.20-0.40% of Cu, 0.10-0.20% of Mo, 0.06-0.10% of V, 0.010-0.025% of Ti, 0.035% or less of P, 0.010% or less of S and the balance Fe and inevitable residual impurity elements. According to the rebar, by adding small amounts of the alloying elements and fully using each individual element and the synergistic action among the elements, the corrosion resistance performance of the rebar is improved; the production method of the rebar comprises the steps of conventional smelting and casting and adoption of a controlled rolling and controlled cooling technology on a bar mill; noble metal elements in the rebar are low in contents, the toughness, the weldability and the corrosion resistance performance of the rebar are excellent, resources are saved, and the production cost is low.

A seawater corrosion resistant submerged arc welding wire is characterized in that the welding wire is made by the following chemical components according to mass percentage: 0.20-0.35 percent of Cu, 0.65-1.15 percent of Cr, 0.35-0.55 percent of Ni, 0.15-0.25 percent of Mo, 0.07-0.11 percent of C, 0.07-0.22 percent of Si, 1.0-1.38 percent of Mn, 0.05-0.1 percent of Nd, not more than 0.012 percentof P, not more than 0.012 percent of S, and the balance of iron and inevitable impurities. By reasonable design to the chemical components, the seawater corrosion resistant submerged arc welding wireis characterized by corrosion resistance, high strength, good toughness, strong anti-welding cold cracking ability and the like, with the tensile strength of greater than 600MPa and the minus 40 DEG C low temperature impact property of Axv of not less then 65J. After welding, the forming is beautiful, harmful defects such as crack, welding beading and undercut and the like do not exist, and the welding seam has good matching effect with the ocean engineering steel, thereby meeting the high requirements of seawater corrosion resistance, high strength, and high toughness of the welding seam.

The invention discloses a welded steel tube for a carrier roller and a manufacturing method thereof. The welded steel tube comprises the compositions of, by mass, 0.050%-0.150% of C, 0.05%-0.26% of Si, 0.5%-1.50% of Mn, less than or equal to 0.010% of P, less than or equal to 0.005% of S, 0.02%-0.05% of Al, 0.1%-0.5% of Cr, 0.01%-0.05% of Nb, 0.01%-0.05% of V, 0.01%-0.05% of Ti and the balance Feand unavoidable impurities, a carbon equivalent Ceq is less than or equal to 0.4%, and a cold crack sensitivity index Pcm is less than or equal to 0.2%. The technical problems that machinability and the usage requirements of the welded steel tube for the carrier roller are inconsistent in the prior art, forming precision control is insufficient and the production requirements of the carrier rollercannot be met are solved. The technical effects that chemical elements of reasonable proportions are used, excellent cold-forming property and welding properties are achieved, the cracking of base metal or weld joints in pipe making is avoided effectively, and through reasonable hot rolling process design, the finished steel coil of hot rolling strip used for produced carrier rollers has a good shape and surface quality, good formability and abrasion resistance to adapt to the processing requirements of welded steel tubes used for the carrier rollers and meet the requirements for the use of welded steel tubes for the carrier rollers.

The invention mainly discloses a production technology of an improved bolt. The production technology comprises the steps that 42CrMoE rolled steel is adopted as a raw material, a blank is prepared, heat treatment is conducted, surface treatment is conducted, and defectoscopy is conducted, wherein the raw material 42CrMoE comprises the chemical components in percentage by mass: 0.38%-0.48% of C, 0.10%-0.40% of Si, 0.75%-1.00% of Mn, smaller than or equal to 0.025% of P, smaller than or equal to 0.015% of S, 0.80%-1.15% of Cr, 0.15%-0.30% of Mo, and the balance of Fe. According to the production technology of the improved bolt, products obtained through the technology meet the requirements of nuclear power first-level equipment, nuclear power second-level equipment and nuclear power third-level equipment, and the strength, the hardness and impact resistance are all up to the standard.

The invention mainly discloses a bolt production process. 42CrMoE steel is used as a raw material, and blank preparation, heat treatment, surface treatment and flaw detection are carried out, whereinthe raw material 42CrMoE comprises chemical compositions including, by mass, 0.38%-0.48% of the C content, 0.10%-0.40% of the Si content, 0.75%-1.00% of the Mn content, not larger than 0.025% of the Pcontent, not larger than 0.015% of the S content, 0.80%-1.15% of the Cr content, 0.15%-0.30% of the Mo content and the balance Fe. A product produced by the process meets the requirements of nuclearpower first, second and third stage equipment, and the strength, hardness and impact resistance are up to the standard.

The invention mainly discloses a production process of bolts. 42CrMoE steel is adopted as a raw material, and the steps of blank preparation, thermal treatment, surface treatment and flaw detection are carried out, wherein the raw material 42CrMoE is prepared from, by mass, 0.38%-0.48% of C, 0.10%-0.40% of Si, 0.75%-1.00% of Mn, smaller than or equal to 0.025% of P, smaller than or equal to 0.015%of S, 0.80%-1.15% of Cr, 0.15%-0.30% of Mo and the balance Fe. The produced products meet the requirements of nuclear power first-level, second-level and third-level equipment, and the strength, hardness and impact force resistance all meet standards.

The invention provides a preparation method of a novel stainless steel material. The preparation method comprises the following steps: 1, smelting cast iron in a vacuum induction furnace, adding chromium, silicon and molybdenum when the cast iron begins to melt, adding tungsten, manganese, nickel, boron and vanadium for smelting when the cast iron is completely molten, and casting a consumable electrode; 2, carrying out vacuum arc remelting refining or electroslag remelting refining on the consumable electrode to prepare an electroslag ingot; 3, compressing the electroslag ingot into a stainless steel sheet, and then sequentially carrying out hot forging, first annealing and second annealing on the stainless steel sheet to prepare a stainless steel substrate; 4, carrying out hot rolling on the stainless steel substrate, and then carrying out deep cold rolling till a nanocrystalline stainless steel material layer is formed on the surface layer of the stainless steel substrate; and 5, dipping the stainless steel substrate obtained in step 4 into a sulfuric acid aqueous solution till a passivation film is formed on the stainless steel substrate, and then carrying out cold treatment on the stainless steel substrate obtained in step 4 by adopting a liquid nitrogen gasification method. By adoption of the preparation method provided by the invention, the corrosion resistance of a stainless steel material can be greatly improved, and the high strength and toughness can be guaranteed.

The invention discloses a 1,200 MPa-stage silicon-manganese-chromium-series hot-rolled low-carbon steel plate and a preparation method thereof. The hot-rolled low-carbon steel plate comprises, by weight, 0.06%-0.14% of C, 2.5%-3.5% of Mn, 1.0%-1.6% of Si, 0.5%-1.2% of Cr, 0.1%-0.3% of Mo, 0.1%-0.5% of Ni, 0.002%-0.010% of S, 0.003%-0.010% of P, 0.01%-0.05% of Al, 0.003%-0.005% of N and the balanceFe, the tensile strength is 1,250-1,360 MPa, and the elongation is 12.8%-16.9%. The preparation method comprises the steps that (1), heat preservation is conducted on a steel billet at the temperature of 1,120-1,200 DEG C; (2), a hot-rolled plate is prepared through rough rolling and fine rolling; and (3), water cooling is conducted till the temperature is lower than or equal to 320 DEG C, and the hot-rolled plate is put into an isothermal heating furnace to be cooled along with the furnace. According to the method, the operation process is simple, cold rolling is not needed, quenching and tempering treatment is not needed, the production cost is reduced, and industrialized production is easy to achieve.

The invention mainly discloses a bolt production technology. A 42CrMoE steel material is used as a raw material, and blank preparation, heat treatment, surface treatment and flaw detection are carriedout. The raw material 42CrMoE is prepared from chemical ingredients comprising, by mass, 0.38%-0.48% of C, 0.10%-0.40% of Si, 0.75%-1.00% of Mn, 0.025% or less of P, 0.015% or less of S, 0.80%-1.15%of Cr, 0.15%-0.30% of Mo and the balance Fe. The product obtained in the production meets the requirements of nuclear power level 1, 2 and 3 equipment, and the strength, hardness and impact resistanceall meet standards.

The invention discloses E420-W300 ultrahigh-strength ship plate steel, comprising the following chemical components in percentage by mass: 0.04-0.12% of C, 0.15-0.35% of Si, 1.20-1.40% of Mn, less than or equal to 0.020% of P, less than or equal to 0.0030% of S, 0.030-0.060% of V, 0.010-0.030% of Nb, 0.030-0.080% of Ant, 0.005-0.030% of Ti, 0.0005-0.0040% of Ca, less than or equal to 0.0060% of N.(Alt N)/Ti is controlled within 0.010-0.030; the yield strength is larger than or equal to 420 MPa; the tensile strength is larger than or equal to 530 MPa; the steel plate is suitable for high-strength ship plate steel with the welding linear energy within the range of 300 kJ/cm; and the average impact energy of HAZ of the steel plate at the temperature of -40 DEG C is 42 J or above.

The invention mainly discloses a production process of a high-performance bolt. 42CrMoE steel is adopted as a raw material, and blank preparation, heat treatment, surface treatment and flaw detectionare carried out, wherein the raw material 42CrMoE comprises the following chemical components in percentage by mass: 0.38-0.48% of C, 0.10-0.40% of Si, 0.75-1.00% of Mn, less than or equal to 0.025% of P, less than or equal to 0.015% of S, 0.80-1.15% of Cr, 0.15-0.30% of Mo and the balance Fe. The product produced by the production process meets the requirements of nuclear power first-level, second-level and third-level equipment, and the strength, hardness and impact resistance all reach the standard.

The invention discloses a supporting base wearing plate. With shape memory alloy as a matrix, the outer surface of the matrix is provided with a Titanium-plated coat, and the outer surface of the Titanium-plated coat is provided with a coated film. Rigidity, yield strength, strength of extension and impact resistance of the shape memory alloy is improved by adding high purity neodymium rare earth elements; compared with iron nickel titanium molybdenum shape memory alloy with a same percentage of iron atom and molybdenum atom, the adopted shape memory alloy has higher strength and corrosion-resistant performance at a temperature of -150DEG to +150 DEG C; the adopted shape memory alloy can bear big load action, has high security coefficient and prolongs service life; the coated film arranged on the outermost layer can improve corrosion-resistant performance, solvent resistance and oil resistance of the material itself, and is suitable for being applied to a position in which service environment is complex such as a bearing, supporting base and the like. Among them, properties of the coated film are affected when titanium atom content is too low, while too high content causes inferior compactness, thus proper content needs to be controlled.

The invention discloses E550-W100 ultrahigh-strength ship plate steel. The E550-W100 ultrahigh-strength ship plate steel comprises the following chemical components in percentage by mass: 0.04%-0.12%of C, 0.15%-0.35% of Si, 1.50%-1.70% of Mn, less than or equal to 0.020% of P, less than or equal to 0.0030% of S, 0.030%-0.060% of V, 0.010%-0.030% of Nb, 0.030%-0.080% of Alt, 0.005%-0.030% of Ti, 0.0005%-0.0040% of Ca and less than or equal to 0.0060% of N, wherein (Alt.N)/Ti is controlled to be 0.010 to 0.030. The yield strength of an obtained steel plate is larger than or equal to 550 MPa, the tensile strength of the steel plate is larger than or equal to 670 MPa, the steel plate is suitable for high-strength ship plate steel with the welding line energy within the range of 100 kJ/cm, andthe average impact energy of the HAZ of the steel plate at the temperature of -40 DEG C is 55 J or above.