36results about How to "Optimized rolling process" patented technology

The invention provides a steel bar with high weather resistance, low cost and seawater corrosion resistance and a production process. The steel bar comprises the following elementary compositions of,by weight, 0.04%-0.10% of C, 0.10%-0.50% of Si, 0.5%-1.6% of Mn, 0.03% or less of P, 0.02% or less of S, 2%-4% of Cr, 0.3%-0.5% of Cu, 0.2%-0.6% of Ni, and the balance Fe and inevitable impurities. According to the steel bar, the mechanical property meets the requirement of the steel bar for corrosion resistance, the aging strain is low, and the corrosion rate is lower than 70% that of common steel bars. The technical path of the process comprises a 70-ton ultrahigh-power electric furnace, LF ladle refining, deoxidation and alloying after steel discharging, argon blowing, continuous casting of165 square billets at four streams by four machines, a heat accumulating type stepping heating furnace, 18 non-twist tandem mills, controlled-rolling and controlled-cold cooling, finishing, packagingand storage.

The invention relates to a production technology for 1070A alloy aluminum foil with the ultrahigh strength and the high elongation for a lithium battery. The aluminum foil for the lithium battery comprises, by mass percentage, less than or equal to 0.2% of Fe; less than or equal to 0.1% of Si, less than or equal to 0.1% of Cu, less than or equal to 0.05% of Mn, less than or equal to 0.03% of Mg, less than or equal to 0.03% of Zn, less than or equal to 0.04% of Ti, and greater than or equal to 99% of Al. The preparation method comprises the steps of (1) smelting, and cast rolling; (2) cold rolling; and (3) aluminum foil rolling, specifically, cutting a aluminum foil coil to obtain the finished aluminum foil for the lithium battery. The production technology has the beneficial effects that a newly improved 1070A alloy is adopted, the proportion is reasonable, an electrolytic aluminum liquid with the high purity is adopted, a novel tubular filter box is adopted for production in the cast rolling process, the technology is scientific, the mechanical performance indexes of products can be improved, the tensile strength and the elongation of the products are higher than those of similar products in China, and the use requirements of customers can be met.

The invention discloses a method for predicting strip surface coefficients of heat transfer in hot rolling procedures. The method includes predicting strip surface coefficients of heat transfer by the aid of a finite-element model and heat transfer modifier formulas; determining the strip surface coefficients of heat transfer according to comparison values of measured temperatures and computed temperatures of strips. The method has the advantages that the method is specially used for predicting the strip surface coefficients of heat transfer in the strip hot rolling procedures, change of the strip surface coefficients of heat transfer in the integral rolling procedures can be acquired, information is detailed and accurate, the strip surface coefficients of heat transfer are high in prediction precision, and setting and optimizing parameters can be provided for the rolling procedures; the method is high in applicability and computational efficiency and is applicable to roughing mills and finishing mills in hot continuous rolling procedures.

The invention discloses a production method of a GH5188 square exhaust nozzle used for an aircraft engine. The production method comprises the steps of blanking, heating, heading, punching, rolling and the like, wherein a ring blank obtained by rolling is extruded into a square billet by adopting a squaring process, and a mandrel supporter and a square saddle are adopted to form the exhaust nozzle finally. The production method has the following beneficial effects that blank production adopts bending after rolling, the wall thickness is uniform and segregation is accurate, so that the wall thickness is uniform after a forge piece is formed, and the utilization rate of raw materials is improved; rolling is adopted during blank production, the mandrel supporter and the square saddle are adopted during forming, and rolling and forming processes are optimized, so that the forge piece has uniform tissue and stable mechanical property, and the service life is prolonged.

The invention provides a magnesium alloy plate strip different-temperature different-speed coordinated rolling device and application, and belongs to the field of magnesium alloy machining. According to the different-temperature and different-speed coordinated rolling device, a roller induction heating system and a roller speed adjusting system are arranged on a rolling mill; the roller induction heating system comprises an induction coil, and the heating temperature of the upper temperature measuring probe is controlled by a heating system console. The roller speed adjusting system comprises a motor, a speed reducer, a coupler and the like which are respectively connected with the upper roller and the lower roller; the temperatures and the speeds of the upper roller and the lower roller are independently adjusted through a master console. According to the device, the different-speed ratio and the different-temperature ratio of the upper roller and the lower roller can be set according to needs, different-temperature and different-speed rolling is conducted on a magnesium alloy plate, and the magnesium alloy plate strip of a thickness-direction gradient structure is prepared. According to the device and the process, the two problems that in the current magnesium alloy field, a gradient structure in the thickness direction of a plate strip is difficult to prepare, and asymmetrical rolling plate type bending is serious are solved at the same time. And technical support is provided for future application expansion of the wrought magnesium alloy.

The invention relates to the field of electric sliding doors, in particular to a main frame for a suspension type electric sliding door. A technical scheme provided by the invention is as follows: a motor 2, a rail 3 and roller wheels 4 which are matched with the rail are arranged at one side of a back plate, which is fixed with a wall surface, on a main frame; door leaf fixing pieces 6 are connected to the roller wheels and the roller wheels are connected with the upper part of a door leaf 7 through the door leaf fixing pieces; and the motor drives the door leaf fixing piece and drives the roller wheels to roll along the rail through a transmission mechanism. The main frame for the suspension type electric sliding door is characterized in that only one working sliding rail is arranged on the rail 3; the roller wheels are in one-to-one correspondence with the door leaf fixing pieces; each roller wheel is further provided with an anti-prying plate 8; the anti-prying plates are fixed and connected with the door leaf fixing pieces; the lower part of each anti-prying plate is provided with a curved surface 9 which is matched with the cross section of the rail and through which the rail can pass; and the roller wheels are arranged in the space which is formed by the door leaf fixing pieces and the anti-prying plates. According to the main frame provided by the invention, the installation space of the main frame is saved, the structure is simple, the manufacture technology requirement is lower and the roller wheel faults are reduced, therefore the working position of the roller wheels in the rail is ensured, and the roller wheels can bear quite large door leaf accidental impact or lateral manmade sabotage.

The invention relates to an economical steel plate with the thickness reaching 80mm for polar region low-temperature environment and a production method thereof. The economical steel plate is preparedfrom the following components in percentage by weight: 0.04-0.10% of C, 0.15-0.40% of Si, 1.20-1.40% of Mn, 0.020-0.050% of Nb, 0.020-0.050% of V, 0.010-0.030% of Ti, 0.015-0.050% of Als, 0.10-0.40%of Ni, less than 0.010% of P, less than 0.003% of S, less than or equal to 0.40% of CEV, and the balance of Fe and inevitable impurities. Through the component design, by reasonably adjusting the relative content between each element and economically controlling Ni alloy elements beneficial to low-temperature toughness, by combining subsequent strengthening rolling and refined crystalline strengthening to remedy strength loss and improve core performance of a large-thickness steel plate, the whole thickness fracture surface of the obtained steel plate has high toughness, and the demands of polar region rigor application environment on high-performance steel are met.

The invention provides 800MPa steel based on a multi-mode thin slab continuous casting and rolling production line, and belongs to the technical field of steel. The 800MPa steel based on the multi-mode thin slab continuous casting and rolling production line comprises the following chemical components in percentage by mass: 0.03 to 0.15 percent of C, less than or equal to 0.05 percent of Si, 1.3 to 2.1 percent of Mn, 0.02 to 0.35 percent of Al, less than or equal to 0.010 percent of P, less than or equal to 0.005 percent of S, 0.010 to 0.10 percent of Nb, 0.10 to 0.30 percent of Mo, 0.015 to 0.15 percent of Ti, 0.1 to 0.5 percent of Cr, less than or equal to 0.005 percent of N and the balance of Fe and inevitable impurities. By improving the chemical components, the production line and the preparation method for the steel, the obtained steel is good in pattern, high in dimensional precision and small in strength fluctuation. The invention further provides a production method for the 800MPa steel based on the multi-mode thin slab continuous casting and rolling production line.