99results about How to "Good stamping performance" patented technology

A hot-dip galvanized steel sheet which is produced from a cold-rolled steel sheet, as a base steel sheet, consisting essentially of C: 0.010-0.06 wt %, Si: no more than 0.5 wt %, Mn: no less than 0.5 wt % and less than 2.0 wt %, P: no more than 0.20 wt %, S: no more than 0.01 wt %, Al: 0.005-0.10 wt %, N: no more than 0.005 wt %, Cr: no more than 1.0 wt %, Mn+1.3Cr: 1.9-2.3 wt %, Fe: remainder, and having a structure composed of ferrite and a second phase containing martensite, said second phase in the structure accounting for no more than 20% in terms of area and martensite in the second phase accounting for no less than 50%, and which has a zinc-plated layer formed on the surface thereof by hot-dip galvanizing or hot-dip galvannealing. A process for production of said hot-dip galvanized steel sheet. This steel sheet has a composite structure containing martensite and yet it has a low strength (no higher than 500 MPa) and also has good strength-ductility balance.

The invention relates to an aluminum alloy for an automobile body of an automobile and a plate manufacturing method thereof and belongs to the technical field of aluminum alloy. The alloy comprises the following components in percentage by weight: 0.6 to 1.33 percent of Mg, 0.6 to 1.33 percent of Si, 0.3 to 0.7 percent of Cu, less than or equal to 0.3 percent of Zn, less than or equal to 0.15 percent of Fe, 0.2 to 0.8 percent of Mn, 0.01 to 0.3 percent of Cr, 0.01 to 0.3 percent of Ti and the balance of Al, wherein the mass fraction ratio of Mg to Si is 1; the total content of the mass fractions of Mn, Cr and Ti alloy elements is more than or equal to 0.3 percent; and Cu content is more than or equal to 0.3 percent. The method for manufacturing the aluminum alloy for the automobile body of the automobile comprises the following steps of: (1) smelting the alloy; (2) shaping the alloy by casting; (3) performing pre-nucleation treatment; (4) performing homogenization treatment; (5) performing hot rolling; (6) performing intermediate annealing; (7) performing cold rolling; (8) performing solid solution water quenching treatment; (9) standing a product at room temperature; and (10) performing pre-ageing and standing the product at the room temperature for more than two weeks. The aluminum alloy and the method are characterized in that: an alloy casting process and a plate production process of the invention are simple and convenient to control; an alloy plate of the invention has high intensity and excellent stamping forming property; and the stamping yield of a covering part for the aluminum alloy automobile body can be effectively enhanced and stamping cost is lowered.

The invention relates to a hard tinned plate which is suitable for stamping processing and is produced from low carbon Al-killed steel. The original plate comprises the chemical components by weight percentage: 0.08 to 0.13 percent of C, less than or equal to 0.025 percent of Si, less than or equal to 0.65 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, 0.02 to 0.06 percent of solAl, less than or equal to 0.03 percent of Ti, less than or equal to 0.005 percent of N, and Fe and unavoidable impurities accounting for the margin. The production process adopts the steps of steelmaking with molten iron->continuous casting-hot rolling->push-pull mode pickling->HC rolling mill cold rolling->electrolytic degreasing->hydrogen bell furnace annealing(BA)->double-machine leveling->electrolytic tinning, and finally the hard tinned plate can be obtained. The hard tinned plate of the invention has the advantages of low cost, high hardness, favorable stamping processability, and the like, and can be widely used as packing materials for food, drinks, etc.

The invention discloses a low-cost high-strength prepainted steel sheet and a manufacture method thereof. The low-cost high-strength prepainted steel sheet comprises the following base materials containing chemical components in percent by weight: 0.06-0.10 percent of C, not more than 0.05 percent of Si, 0.30-0.70 percent of Mn, 0.01-0.03 percent of P, not more than 0.02 percent of S, 0.01-0.07 percent of solAl, not more than 0.005 percent of N, not more than 0.08 percent of Cr, not more than 0.11 percent of Cu, not more than 0.06 percent of Ni and the balance of Fe and unavoidable impurities. The preparation method comprises the steps of: steel-making through molten iron, continuously casting, hot-rolling, acid-washing, hot dipping, alloying, finishing and prepainting. The prepainted steel sheet has the advantages of good stamping property, excellent corrosion prevention property, low production cost and better economic and social benefits, and can be widely applied to the outdoor large building industry.

The water-soluble lubricating oil composition of this invention contains animal fats and oils and/or plant fats and oils, and the nonionic surfactant of polyoxyethylene sorbitol fatty acid ester. The water-soluble lubricating oil composition of this invention is excellent in emulsion stability, and it can reduce environmental pollution. It is suitably as metal processing oils such as cutting oil and plastic working oils, and release agent such as asphalt mixture adhesion prevention agent and concrete release agent.

The present invention provides a heat-dissipating black resin composition having excellent physical properties such as heat-dissipating property, workability, corrosion resistance, solvent resistance, coating adherence and gloss and being free from chromium and used for surface treatment of a zinc coated steel sheet, a method for treating a zinc coated steel sheet, and a zinc coated steel sheet treated thereby. The heat-dissipating black resin composition includes, based on 100 parts by weight of the heat-dissipating black resin composition: 10 to 60 parts by weight of a resin composition which at least one main resin and a melamine-based curing agent are mixed in a weight ratio of 10:2-7, the main resin being selected from the group consisting of polyester resin, epoxy resin, polyolefin resin, polyurethane resin, fluorine resin, phenol resin, acryl resin and polycarbonate resin; 1 to 10 parts by weight of at least one pigment selected from the group consisting of carbon black and carbon nano tube; 1 to 10 parts by weight of a matting agent; and the balance of a solvent. Also, the method for treating a steel sheet with a heat-dissipating black resin composition includes: coating a steel sheet with the heat-dissipating black resin composition so that a thickness of a dry coating film is in a range of 3 to 30 micrometers; and drying the heat-dissipating black resin composition, and the steel sheet is treated according to the method. The resin-coated steel sheet includes a thin resin layer, shows excellent heat- absorbing/dissipating properties, has excellent physical properties such as corrosion resistance, press workability, surface electrical conductivity and solvent resistance, and is environmental- friendly since it is free from a chromium component.

The invention discloses a low-cost aging resistant household appliance color coated sheet. The color coated sheet is made of, by weight, 0.010-0.030% of C, no more than 0.030% of Si, 0.015-0.35% of Mn, no more than 0.020% of P, no more than 0.020% of S, 0.020-0.060% of A1s, 0.005-0.020% of Ti, no more than 0.0040% of N, and the balance Fe and other unavoidable impurities. The invention further discloses a production method of the household appliance color coated sheet. The method comprises the steps of molten iron steelmaking, continuous casting, hot rolling, acid pickling, cold rolling, hot galvanizing, finishing, pulling correcting and color coating. In the hot galvanizing step, the continuous annealing temperature is 785-795 DEG C. The sum of the ductility of the finishing step and the ductility of the pulling connecting step is 1.0-1.2%. The low-cost aging resistant household appliance color coated sheet and the production method thereof are simple in technology, high in strength and rigidity, good in stamping property, aging resistant, low in cost, and capable of being widely used in the technical field of the iron and steel smelting technology.

The invention discloses a cold-rolled high-strength dual-phase sheet steel with 400MPa-level tensile strength for a car and a preparation method thereof, and belongs to the field of steel materials. The double-phase sheet steel adopts a ferrite-martensite dual-phase structure serving as the main structure and contains 4 to 9% of martensite and comprises the following chemical components by mass percent: 0.01 to 0.05% of C, 0.1 to 0.4% of Si, 1.2 to 1.6% of Mn, 0.1 to 0.4% of Cr, 0.02 to 0.05% of Als, not greater than 0.005% of N, not greater than 0.02% of P, not greater than 0.01% of S, and the balance of Fe and inevitable residual impurity elements. The preparation method comprises the steps of hot rolling, acid pickling, cold rolling and heat treating. The produced cold-rolled double-phase sheet steel has the yield strength of 200 to 250MPa, tensile strength of 400 to 450MPa and percentage of elongation of 30 to 35%.

The invention relates to a low-cost cold-rolled steel plate production method, which comprises the following steps: controlling the compositions of molten steel; casting the molten steel into a steel billet; heating to 1200-1230DEG C; rough-rolling; refined rolling; reeling into a steel strip reel; cold rolling; continuously annealing, wherein a heating zone is at 780-810DEG C, a soaking zone is at 820-840DEG C, a retarded cooling zone is at 670-700DEG C, a rapid cooling zone is at 320-350DEG C, and an overaging zone is at 340-380DEG C; and cooling to room temperature. The production method is not required for adopting a deep decarbonization technology and adding alloy elements of Ti and the like, so that the production cost is lowered, the mechanical performance of the product achieves the yield strength of 140-170MPa, tensile strength of 280-320MPa, elongation rate of more than or equal to 45.0%, plastic strain ratio of more than or equal to 2.4 and strain hardening index of more than or equal to 0.22, to meet the market requirement, and has good impact molding processability and better material strength.

The invention relates to steel for 13-dwt vehicle axle housing and a production method thereof. The steel comprises the following chemical components by weight: 0.04%-0.08% of C, 0.10%-0.60% of Si, 1.3%-1.45% of Mn, not more than 0.025% of P, not more than 0.08% of S, 0.01%-0.06% of Al, 0.04%-0.06% of Nb, 0.03%-0.05% of Ti, and the balance of Fe and inevitable impurities; The preparation method comprises the following steps: converter smelting; vacuum treatment; continuous casting; casting blank heating; rough rolling; finish rolling by a 7 frame; cooling with laminar flow; coiling. Because of the low carbon content of the steel of the invention, the steel has excellent stamping performance and welding performance, has a stable dimension after cold forming, and completely meets the requirements for manufacturing and application of 13-dwt vehicle axle housing. Through bench tests of the manufactured 13-dwt vehicle axle housing assembly, the product has excellent vertical bending fatigue life, vertical bending rigidity, and vertical bending static strength, and completely meets the requirements of users.

The invention provides a soft tin plate produced by using a continuous annealing mode. A raw material namely low-carbon aluminum killed steel of the tin plate comprises the following chemical components in percentage by weight: 0.01 to 0.03 percent of C, less than or equal to 0.025 percent of Si, 0.10 to 0.25 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.012 percent of S, 0.04 to 0.08 percent of Als, less than or equal to 0.004 percent of N, and the balance of Fe and inevitable impurities. The soft tin plate is produced by using the continuous annealing mode, and has the advantages of uniform performance, good plate shape and good surface quality. Simultaneously, the soft tin plate also has high stamping processability. Besides, the produced soft tin plate also has high corrosion resistance, has a very short production time and a shorter production cycle, saves production cost, has small production difficulties, and is easy to be implemented in large-scale production.

The present invention provides an optical pressure-sensitive adhesive sheet having excellent punching processability. The optical pressure-sensitive adhesive sheet includes: a pressure-sensitive adhesive body; and a separator on at least one side of the pressure-sensitive adhesive body, where the separator has a Young's modulus of 2 GPa or more in a machine direction and a transverse direction, a breaking strength of 400 MPa or less in a machine direction and a transverse direction, and a thickness of 70 μm or more and 250 μm or less, and a release force of the separator to the pressure-sensitive adhesive body in a 180° peel test at a tensile speed of 30 m/min is 0.8 N/50 mm or more.

The invention discloses a strong-shear rolling forming method and a strong-shear rolling forming device for a metal plate. Power is provided by friction force between the plate and rollers during rolling deformation, and the plate is subjected to the strong-shear deformation of dies, and then enters a part between the rollers for plate rolling deformation. The device comprises a double-roller rolling mill, a movable die upper template, a movable die lower template, a stand, a fixed die lower template and a fixed die upper template, wherein the fixed die lower template is fixedly arranged on the stand; the movable die lower template is hinged to the fixed die lower template, and is arranged on the stand through an oil cylinder; the fixed die upper template and the movable die upper template are arranged on the fixed die lower template and the movable die lower template through bolts respectively; the double-roller rolling mill is arranged at an outlet of a metal plate passage. The method and the device are flexible in die equal channel angular adjustment and low in cost; the rolling deformation and the shear deformation of the metal plate such as a magnesium plate and an aluminum plate can be effectively combined, crystal grains of the plate can be refined, the texture evolution of the plate can be controlled, and the mechanical performance and the forming performance of the plate can be improved.

The invention relates to an economical aging-resistance household appliance colorful-coated substrate. The substrate comprises the following chemical components in percentage by mass: 0.001-0.0160 ofC, Si not more than 0.025, 0.10-0.16 of Mn, P not more than 0.015, S not more than 0.012, 0.020-0.050 of Als, N not more than 0.004, and the balance of Fe and inevitable impurities. A production method of the substrate comprises the procedures of desulfurization of molten iron, converter smelting, RH vacuum treatment, continuous casting, inspection and cleaning of plate blanks, heating of the plate blanks, hot continuous rolling, laminar cooling, winding, acid washing, cold rolling, hot galvanization, polishing, finishing, oil coating and packing. The substrate can meet the strength and the hardness needed by household appliance plates, solves the aging, achieves excellent punching performances, facilitates production of deep-punched and deformation-complicated household appliance parts byusers, reduces such defects as cracking during punching, line slippage or edge formation on bent surfaces, and improves the yield of colored plates.

The invention provides silk printing insulation ink for substituting a PTFE insulation membrane by utilizing an electronic product cupronickel shielding cover. The single-component silk printing insulation ink is prepared from the following components by weight percent: 60 to 70 percent of epoxy modified polyester resin, 5 to 15 percent of amino resin, 5 to 10 percent of color concentrate, 1 to 3 percent of anti-settling agent, 5 to 15 percent of DBE environment-friendly solvent, 1 to 3 percent of adhesive agent, 1 to 2 percent of flatting agent, and 1 to 2 percent of defoaming agent. The silk printing insulation ink for substituting the PTFE insulation membrane by utilizing the electronic product cupronickel shielding cover is simple and convenient in use and high in insulation value which is equivalent to PTFE; and meanwhile, a coating film is resistant to scratch, good in flexibility, resistant to impact, capable of reaching 0T curvature, suitable for stamping processing after the silk printing, and suitable for a mobile phone, suitable for the mobile phone, and the insulation function of the electronic product cupronickel shielding cover is capable of substituting the original process of the laminated PTFE membrane, so that the purpose of achieving the high efficiency of mass production is realized.

The invention relates to the field of welding, and particularly provides a composite brazing filler metal, a preparation method and application thereof, and a weldment. The composite brazing filler metal comprises a plurality of brazing filler metal ribs and a plurality of stress buffering ribs, and the multiple brazing filler metal ribs and the multiple stress buffering ribs are connected in a woven mode. The composite brazing filler metal is novel in structure, has a good effect of slowly releasing thermal stress, and is high in welding strength, and the problems of tearing, desoldering andthe like are not prone to occurring at a welding joint.

The quenchable steel sheet has an alloy composition including carbon (C) in an amount of 0.15˜0.30 wt %, silicon (Si) in an amount of 0.05˜0.5 wt %, manganese (Mn) in an amount of 1.0˜2.0 wt %, boron (B) in an amount of 0.0005˜0.0040 wt %, sulfur (S) in an amount of 0.003 wt % or less, phosphorus (P) in an amount of 0.012 wt % or less, one or more selected from among calcium (Ca) in an amount of 0.0010˜0.0040 wt % and copper (Cu) in an amount of 0.05˜1.0 wt %, two or more selected from among cobalt (Co), zirconium (Zr) and antimony (Sb), and iron (Fe). Alloy elements are controlled to increasing hot ductility and enabling pressing at 600˜900° C. so that a tensile strength of 1400 MPa or more and an elongation of 8% or more are obtained after pressing.

The present invention addresses the problem of securing high thickness accuracy even for ultra-thin stainless steel foil having a thickness of 60 mum or less while also securing plastic deformability and breaking elongation, that is, securing excellent press workability (deep drawability). The present invention solves the above problem by providing an ultra-thin stainless steel foil, which has 3 or more crystal grains in the thickness direction, and in which the recrystallization rate is between 90% and 100% inclusive, and the nitrogen concentration at the surface is 1.0 mass% or less. Thus, with this method for manufacturing an ultra-thin stainless steel foil having a thickness of 5 to 60 mum by rolling a stainless steel sheet and subsequently performing final annealing, it is possible to manufacture an ultra-thin stainless steel foil in which the rolling reduction from rolling immediately prior to the final annealing is 30% or more, the post-rolling final annealing temperature is 950 DEG C to 1050 DEG C in the case of austenitic stainless steel and 850 DEG C to 950 DEG C in the case of ferritic stainless steel, and the nitrogen content of the atmosphere gas during final annealing is 0.1 vol% or less.