39results about How to "Meet the forming requirements" patented technology

The invention discloses a method and device for laser pulse and electromagnetic pulse composite forming of a metal sheet and relates to the technical field of processing and manufacturing fastening holes. The head part of an energy absorption rod (10) is a conical surface; a high-power pulse laser outputs an annular laser pulse (8) by means of a light spot regulator (15); the annular laser pulse (8) accommodates the tip part of the conical surface on the head part of the energy absorption rod (10) in a hollow part of a laser beam, and meanwhile, the annular laser pulse (8) is acted on the conical surface on the head part of the energy absorption rod (10) to induce plasma (17) to explode and generate impact waves acted on the internal walls of the fastening holes, so that the fastening holes are strengthened. The method and the device are suitable for strengthening the fastening holes with small diameter; the hollow part of the annular laser pulse (8) keeps away from the tip part of the conical surface of the energy absorption rod (10), so that the energy absorption rod (10) is difficult to damage, which is beneficial to continuously working and achieving a good strengthening effect.

The invention discloses an autoclave-based creep age forming flexible frock, which comprises a vacuum bag, a bottom plate, a high frame, a low frame, nail battens, four gaskets, an adjusting stud, a fixed plate and an air exhaust hose, wherein the bottom plate is provided with a pin hole and a threaded hole; the high frame has a frame body consisting of two short high frames and two long high frames, and the vacuum bag is covered on the high frame and a piece to be formed; the low frame has a frame body consisting of two short low frames and two long low frames, the high frame is fixed at theperiphery of the low frame, and both the high frame and the low frame are fixed on the bottom plate; the nail battens are arranged on the bottom plate in parallel and fixed in the frame body of the low frame through side bolts; the four gaskets are arranged between the inner wall of the low frame and the nail battens; the lower part of the adjusting stud taps the screw thread which is used for forming the fixed plate with a screw thread pair; the central position of the fixed plate taps the screw thread hole which is used for forming the screw thread pair with the adjusting stud, the adjusting stud is fixed on the fixed plate, and then the fixed plate and the adjusting stud are fixed on the nail battens; and the air exhaust hose is connected to an air exhaust tube nozzle which penetrates and is fixed on the corresponding hole of the bottom plate and is hermetically connected through a silicon rubber gasket.

The invention discloses a superplastic forming method of a 1Cr21Ni5Ti duplex stainless steel complex section ring piece. The superplastic forming method comprises the following steps: heating 1Cr21Ni5Ti duplex stainless steel to 1,000-1,200 DEG C, repetitively conducting upsetting and drawing until total forging deformation reaches 55-70 percent, heating to 1,250 DEG C at the heating speed of 2 DEG C per second, and preserving heat for 30 minutes to obtain a fine-grained 1Cr21Ni5Ti duplex stainless steel blank; heating the blank to forging temperature, and conducting upsetting, punching and height flattening to obtain an alloy ring blank; at temperature of 940-980 DEG C, rolling the alloy ring blank at the maximum feeding speed of 2.8mm/s to obtain the 1Cr21Ni5Ti duplex stainless steel complex section ring piece. The method can enable 1Cr21Ni5Ti duplex stainless steel to be in a superplastic state during formation, and thus the 1Cr21Ni5Ti duplex stainless steel complex section ring piece with performance and dimension which satisfy the requirements is obtained. The ring piece is mainly used as a connecting ring, a bearing ring or the like and is widely used on mechanical equipment in the industrial fields such as aviation and space flight.

The invention discloses a grid strain analysis method for thin plate forming and an application of the method, and relates to forming production techniques of metal materials such as automobiles and small metal components. The method comprises the following steps: firstly, directly drawing grid lines with the same length in a centralized limited strain area for forming metal plate workpieces and on the surface of metal plates, after stamping deforming, measuring direct deformation values of the grid lines with wrinkles or cracks in the centralized limited strain area, and respectively adjusting the process according to the calculated deformation situations. The method can be applied to stamping sites at any time, and is generally not limited by conditions. The method can be widely popularized and used in production lines, and is low in cost and easy to master.

The invention discloses a 2,000 MPa-grade acid pickling steel plate for a hot stamping wheel rim and a manufacturing method of the acid pickling steel plate. The 2,000 MPa-grade pickled steel plate comprises 0.36%-0.39% of C, 0.01%-0.10% of Si, 1.36%-1.60% of Mn, less than or equal to 0.010% of P, less than or equal to 0.004% of S, 0.015%-0.055% of Al, 0.041%-0.055% of Nb, 0.035%-0.055% of V, 0.26%-0.35% of Mo, 0.0041%-0.006% of B, 0.035%-0.050% of rare earth elements La and Ce, equal to or less than 0.003% of N and the balance of Fe and unavoidable impurities.

The invention relates to 800MPa-grade high-cold-bending cold-rolling dual-phase steel. A steel plate comprises the following chemical components in percentage by weight: 0.05-0.09 of C, 0.01-0.05 of Si, 1.7-2.2 of Mn, 0.01-0.04 of Nb, 0.01-0.04 of Ti, 0.1-0.5 of Cr, 0.15-0.3 of Mo, 0.015 of P or less, 0.01 of S or less, 0.3-0.8 of Als, 0.005 of N or less, and the balance of Fe and inevitable impurities. The invention further relates to a preparation method of the 800MPa-grade high-cold-bending cold-rolling dual-phase steel, wherein an annealing process is a continuous annealing process, the strip steel is heated to 800-850 DEG C at a heating rate of 1-3 DEG C/s, and slow cooling is conducted to 700-750 DEG C at the speed of 2-4 DEG C/s after heat preservation is conducted for 120-150 s; air cooling is adopted for rapid cooling, and then rapid cooling is conducted to 250-300 DEG C at the cooling speed of 10-20 DEG C/s; and overaging treatment is conducted for 250-400 s, wherein the smooth elongation is 0.2%-0.5%.

The invention discloses high-elongation hot-rolled structure regulated and controlled steel with the tensile strength greater than or equal to 1200 MPa. The steel comprises the following components of, by weight, 0.19%-0.21% of C, 1.60%-1.80% of Mn, 0.60%-0.70% of Si, less than or equal to 0.008% of P, less than or equal to 0.002% of S and 0.02%-0.04% of Als. The production method comprises the following steps that smelting is performed by a converter, and then RH vacuum furnace treatment is performed; a casting blank is heated; staged rolling is performed; staged variable-speed cooling is performed; coiling is performed; heat preservation is performed; and leveling treatment is performed. According to the steel and the production method, under the condition that Nb, V, Mo and other alloysare not added, it can be guaranteed that the tensile strength is 1200 MPa or above, the elongation is greater than or equal to 15%, the thickness of a steel plate is 7-12 mm, then the forming requirement of thick-specification high-strength steel can be met, and the alloy cost is reduced by at least 10%.

The invention discloses a super-plasticity forming method for a GH4169 alloy ring part with a complex section. The method comprises the steps that GH4169 alloy is heated to the temperature of 1000+/-10 DEG C, after forge deformation with deflection of 40%-50%, the temperature is kept at 890 DEG C for 10 hours, then raised to 950 DEG C and kept for 3 hours, and a crystal GH4169 alloy blank is obtained; the GH4169 alloy blank is heated to forge temperature, and an alloy ring blank is obtained through upsetting, punching and levelling; the alloy ring blank is rapidly rolled and formed at the maximum feed speed of 1.7 mm/s at the temperature of 1060-1080 DEG C, and the GH4169 alloy ring part with the complex section is obtained. According to the method, the GH4169 alloy can be in a super-plasticity state in the forming process, so that the GH4169 alloy ring part with the complex section and both the performance and the size meeting requirements is obtained. The ring part is mainly taken as a connection ring, a bearing ring and the like to be widely applied to mechanized equipment in the industry areas such as aviation and aerospace.

The invention discloses a 2000MPa-grade hot-rolled steel plate for a hot-stamped wheel rim and a manufacturing method of the 2000MPa-grade hot-rolled steel plate. The 2000MPa-grade hot-rolled steel plate comprises 0.36%-0.39% of C, 0.01%-0.10% of Si, 1.46%-1.70% of Mn, less than or equal to 0.010% of P, less than or equal to 0.004% of S, 0.015%-0.055% of Al, 0.041%-0.055% of Nb, 0.030%-0.050% of V, 0.26%-0.35% of Mo, 0.0041-0.006% of B, 0.035%-0.050% of of rare earth elements La+Ce, less than or equal to 0.003% of N, and the balance Fe and inevitable impurities.

The invention belongs to the technical field of amorphous alloy preparation, and relates to a method for preparing a high-entropy reinforced amorphous alloy composite material. The method comprises the following steps that amorphous alloy powder and high-melting-point high-entropy alloy powder with high toughness are evenly mixed according to a designed volume fraction, the mixed powder is conveyed out through airflow with supersonic speed, and the mixed powder and a laser focus are converged at a position 2-30mm above a deposition substrate; the amorphous alloy powder is heated to be in a molten state through laser suspension, meanwhile, the amorphous alloy powder is blown and cooled to be in a supercooled liquid state through supersonic airflow in the process of flying to the deposition substrate, an amorphous alloy matrix is deposited on the substrate, the high-entropy alloy powder is kept not molten all the time in the process, and finally, the high-entropy alloy powder is uniformly distributed in amorphous alloy formed by deposition in a reinforced phase form; the melting point of the high-entropy alloy powder is higher than that of the amorphous alloy powder; and an amorphous alloy composite material part without size constraint can be prepared, and the material has the performance advantages of high strength and high toughness.

The invention belongs to the technical field of amorphous alloy preparation, and relates to a method for preparing an amorphous alloy. The metal powder is sent out through airflow with supersonic speed, laser is utilized to suspend and melt the powder at the position away from a substrate by a certain distance, and the powder is deposited in a supercooled liquid form after being blown and cooled by the airflow to form amorphous alloy; according to the method, the amorphous alloy block material without size limitation is obtained by controlling the powder feeding, melting and deposition positions in a mode of combining laser suspension melting of alloy powder and supersonic airflow high-speed deposition, meanwhile, the movement track of the substrate can be programmed in the preparation process according to the shape requirement of a workpiece, and the production efficiency is improved. Three-dimensional forming of amorphous alloy workpieces in different shapes is achieved; according to the method, the amorphous alloy size limitation can be solved, the amorphous alloy workpiece without size constraint can be prepared, and the method is particularly suitable for preparing the amorphous alloy workpiece of a large-area thin-wall structure.

The invention discloses high-elongation hot-rolled microstructure regulating steel with tensile strength greater than or less than 800MPa. The steel comprises the following components in percentage byweight: 0.07-0.09% of C, 1.95-2.10% of Mn, 0.70%-0.80% of Si, less than or equal to 0.008% of P, less than or equal to 0.002% of S and 0.02-0.04% of Als; the production method comprises the followingsteps of: carrying out RH vacuum furnace treatment after converter smelting; heating a casting blank; rolling in sections; variable speed cooling in sections: coiling; heat insulation; smoothing treatment. Under the premise of ensuring the tensile strength above 800MPa, the steel can make the yield strength be greater than or equal to 500MPa, elongation greater than or equal to 25%, product of strength and elongation greater than or equal to 20GPa% and yield ratio less than 0.65, the steel can meet the forming requirement of thick specifications and high strength steel, and alloy elements aresimple without adding precious alloys such as Nb, V, Mo, etc.; and the alloy cost can be reduced by at least 10%.