33results about How to "Excellent cold forming performance" patented technology

The invention discloses a short-process production method of a large-diameter thin-walled white copper pipe, which belongs to the technical field of metal materials. Aiming at the traditional "semi-continuous casting solid ingot-piercing extrusion-pickling-drawing-annealing" process to produce large-diameter thin-walled copper-nickel pipes requires more than 5,000 tons of large-scale extrusion equipment, and the yield is low and the cost is high. The present invention proposes a method of horizontal continuous casting of large-sized white copper pipe blanks using hot and cold combined molds, and then adopts diameter expansion or / and diameter reduction drawing to process and form large-diameter thin-walled white copper pipes, which has the advantages of small equipment investment, short process flow, No pickling and other advantages. The outer diameter of the horizontal continuous casting tube blank is 110~350mm, the wall thickness is 5~30mm, the extension coefficient of the drawing pass for expanding diameter is 0.80~1.0, the extension coefficient for drawing pass for reducing diameter is 1.1~1.5, and the outer diameter of the processed product is 100~ 320mm, wall thickness 3~20mm.

The invention discloses a hot-rolled low-yield-ratio high-strength acid corrosion-resistant steel plate and a production method thereof. The main chemical composition and weight percentage content thereof are: C 0.06-0.08%; Si 0.20%-0.40%; Mn 0.80-0.00% 1.20%; P≤0.012%; S≤0.005%; Cr 0.70~1.20%; Ni 0.10~0.30%; Cu 0.20~0.40%; Alt 0.020~0.045%; 0.06~0.12%; the balance is Fe and unavoidable inclusions; the present invention adopts microalloying control technology combined with controlled rolling and controlled cooling principles, based on microstructure type control, deep desulfurization in molten iron pretreatment→converter smelting→furnace External refining→continuous casting→stacking and slow cooling→slab heating→controlled rolling→controlled cooling→coiling Hot continuous rolling strip production line develops high-strength acid-resistant steel products with low yield ratio, excellent formability and acid corrosion resistance , can be used in the manufacture of steel structures serving in acidic corrosive medium environments in transportation, tobacco, electric power, chemical energy, metallurgy and other industries.

The invention relates to a high-strength and high-toughness weather-proof hot-rolled steel plate comprising the chemical components in percentage by weight: (wt,%): 0.05%-0.10% of C, 0.10%-0.50% of Si, 1.00%-1.30% of Mn, less than or equal to 0.015% of P, less than or equal to 0.010% of S, 0.30%-0.70% of Cr, 0.10%-0.40% of Ni, 0.25%-0.50% of Cu, 0.020%-0.050% of Al, 0.010%-0.040% of Nb, 0.010%-0.030% of Ti and the balance Fe and unavoidable impurity elements. Meanwhile, the traditional hot strip rolling process is adopted, and a preparation method specifically comprises the steps: deep desulphurization of molten iron until S is less than or equal to 0.0050%, converter top and bottom combined blowing, alloy fine adjustment, LF secondary refining, slab continuous casting, heating, two-rack rough rolling and seven-rack finish rolling, laminar cooling and reeling. The steel plate disclosed by the invention has the mechanical properties that ReL is 450-500MPa, the Rm is greater than or equal to 550MPa, A is 25.0%-30.0%, the -60 DEG C longitudinal Charpy V-shaped gap impact power is greater than 300J, the high-strength and high-toughness weather-proof hot-rolled steel plate has good matching of strength and toughness, good cold bending forming and welding properties and favorable atmosphere corrosion resistance, and the corrosion resistance of the high-strength and high-toughness weather-proof hot-rolled steel plate is twice as high as that of Q345B steel.

The invention discloses a short-process production method for high-strength and high-conductivity copper alloy strips, and belongs to the technical field of metal materials. In order to solve the problem that large hot rolling equipment is needed when a traditional 'semi-continuous ingot casting-hot rolling-face milling-cold rolling-solid dissolving-cold rolling-aging' process is adopted for producing high-strength and high-conductivity copper alloy strips, meanwhile, the yield is low, energy consumption is large and the cost is high, hot-cold combined casting type horizontal continues castingis adopted for preparing copper alloy plate blanks, then the cold-rolling-solid dissolving-cold rolling-aging process is carried out, the high-strength and high-conductivity copper alloy strips are produced, blank reheating, hot rolling and face milling treatment can be omitted, and the method has the advantages that equipment investment is low, the technological process is short, the yield is high, energy consumption is low, and the production cost is low. The horizontal continuous casting plate blanks are 200-800 mm wide and 5-50 mm thick, the rolling pass deformation is 20-50%, the rollingspeed is 60-600 m / min, and the processed product is 200-800 mm wide and 0.05-2 mm thick.

The invention discloses a high-toughness weather-resistant steel plate with the yield strength of 550MPa and a preparation method of the high-toughness weather-resistant steel plate. The high-toughness weather-resistant steel plate is prepared from the following chemical components by weight percent: 0.05 to 0.10 percent of C, 0.10 to 0.40 percent of Si, 1.20 to 1.70 percent of Mn, less than or equal to 0.012 percent of P, less than or equal to 0.008 percent of S, 0.40 to 0.80 percent of Cr, 0.15 to 0.40 percent of Ni, 0.25 to 0.40 percent of Cu, 0.015 to 0.040 percent of Als, 0.030 to 0.070 percent of Nb, and 0.010 to 0.040 percent of Ti, and the balance of Fe and unavoidable impurities, wherein Pcm is equal to C+Si / 30+(Mn+Cu+Cr) / 20+Mo / 15+Ni / 60+V / 10+5B and less than or equal to 0.20 percent. The microscopic tissue of the weather-resistant steel plate obtained according to the method disclosed in the invention is composite-phase tissue of ferrite, granular bainite and little pearlite,the ReL is 560 to 650MPa, Rm is 680 to 780MPa, A is 22.0 to 26.0 percent, and the longitudinal Charpy V-type impact power KV2 is greater than 70J at the temperature of -40 DEG C, and the high-toughness weather-resistant steel plate has excellent welding performance, cold bending forming performance and atmospheric corrosion resistance.

The continuous thin plate blank casting and rolling process for producing high strength V-N micro alloy steel belt includes smelting and refining in electric furnace or converter, continuous casting, heating after solidification inside bottom heating furnace, hot rolling, laminated flow cooling and winding. The continuous thin plate blank casting and rolling process has the technological parameters of: furnace entering temperature of cast blank 900-1050 deg c, homogeneous heating temperature 1050-1250 deg c, initially rolling temperature 1000-1170 deg c, finally rolling temperature 840-950 deg c and winding temperature 530-670 deg c. The molten steel contains: C 0.03-0.08 wt%, Si 0.01-0.8 wt%, Mn 0.1-2.0 wt%, V 0.01-0.20 wt%, Al 0.01-0.06 wt% and N 0.002-0.03 wt%. The produced high strength and fine grain steel belt and plate has ferrite grain size smaller than 6.0 micron, yield strength of 420-700 MPa, and excellent toughness, welding performance and forming performance.

The invention provides a spring steel used for an automobile suspension. the spring steel comprises the following ingredients in percentage by weight: 0.46-0.56% of C, 0.90-1.20% of Si, 0.80-1.20% of Mn, less than or equal to 0.020% of P, less than or equal to 0.020% of S, 0.70-1.0% of Cr, 0.90-1.50% of Ni, 0.60-0.90% of Mo, 0.50-0.80% of Cu, 0.02-0.07% of RE and the balance of Fe and inevitable impurities. The invention also provides a preparation method for the spring steel and a method for preparing a spring steel wire by using the spring steel. According to the invention, the chemical components of the spring steel are reasonably designed, and the smelting rolling and steel wire preparation method and the auxiliary material adding method and proportion are improved. Compared with the existing 55SiCr steel, the tensile strength of the spring steel disclosed by the invention is improved by 400MPa, the working stress is improved by 200MPa, and the fatigue life is improved by 200 thousand times.

The invention discloses a kind of 600Mpa-grade high-strength hot continuous rolling structural steel and a manufacturing method thereof. The structural steel comprises the following chemical compositions in percentage by weight: 0.14-0.24% of C, less than or equal to 0.50% of Si, 0.5-1.5% of Mn, less than or equal to 0.020% of P, less than or equal to 0.010% of S, 0.04-0.15% of Ti, 0.0005-0.003% of B, less than or equal to 0.05% of Al, and the balance of Fe and unavoidable impurities. According to the composition design, through molten-iron deep desulphurization, external refining, slab preparation by continuous casting, slab reheating, controlled rolling, controlled cooling, and rolling, the structural steel disclosed by the invention is obtained, the yield strength is greater than or equal to 600 MPa, the tensile strength is greater than or equal to 650 MPa, the percentage of elongation is greater than or equal to 16%, and the impact energy at the temperature of 20 DEG C is greater than or equal to 100J, and the structural steel has a good cold-bent forming performance.

The invention discloses a hot-rolled steel material for an automobile friction plate. The chemical composition and mass percentage in the steel are: C: 0.45-0.75%, Si: 0.10-0.30%, Mn: 0.60-1.20%, P≤0.015%, S ≤0.005%, N≤0.006%, Cr: 0.05-0.50%, Als: 0.015-0.050%, Ti≤0.005%, V: 0.01-0.03%, and the rest are Fe and unavoidable impurities. The invention also discloses a preparation method of the hot-rolled steel material of the automobile friction sheet. The hardness of the hot-rolled steel in the invention is controlled at 18-25HRC, and after annealing at 600-850°C, the hardness of the steel is still maintained at 14-18HRC, has good cold forming performance, and the steel does not crack during the punching process.

The invention relates to a cold-rolled hot-dip galvanized steel sheet for an easy-open lid pull ring and a production method thereof, which mainly solves the low tensile strength and high production cost of the existing cold-roll hot-dip galvanized steel sheet for an easy-open lid pull ring question. A cold-rolled hot-dip galvanized steel sheet for an easy-open lid pull ring provided by the invention, the mass percentage of its chemical composition is: C: 0.025%-0.04%, Si: 0.005%-0.03%, Mn: 0.26%-0.35% , P≤0.015%, S≤0.013%, Alt: 0.03%~0.07%, B: 0.004%~0.005%, the balance is iron and unavoidable inclusions. The invention is mainly used for making the pull ring of the easy-open end.