8results about How to "Improve stamping formability" patented technology

The invention discloses 800MPa-grade hot-based galvanized complex-phase steel with low cost and high yield ratio and a preparation method thereof, and belongs to the technical field of plate and strip production. The hot-based galvanized complex phase steel comprises the following components in percentage by mass: 0.060%-0.150% of C, 0.10%-0.35% of Si, 1.00%-2.90% of Mn, less than or equal to 0.020% of P, less than or equal to 0.01% of S, 0.01%-0.07% of Als, 0.10%-0.20% of Ti, less than or equal to 0.050% of N and the balance of Fe and impurities. The preparation method adopts an ultralow-temperature annealing galvanizing process, and comprises the following steps: heating to 530-630 DEG C after acid pickling, carrying out soaking and heat preservation, then cooling to 440-500 DEG C, carrying out heat preservation, carrying out hot galvanizing, taking out of a zinc pot, and cooling to room temperature. According to the hot-based galvanized complex-phase steel produced through the method, the yield strength is larger than or equal to 740 Mpa, the tensile strength is larger than or equal to 800 Mpa, the A80 ductility is larger than or equal to 14%, and the hole expansion rate is larger than or equal to 60%.

Provided is a high strength steel sheet that has a tensile strength of 1180 MPa or more and a uniform elongation of 6 % or more. The high strength steel sheet has a chemical composition that contains predetermined components with a MSC of 3.0 mass% to 4.2 mass%. The high strength steel sheet has a microstructure including upper bainite in an area fraction of 70 % or more as a main phase, fresh martensite and retained austenite in a total area fraction of 7 % to 30 %, with the retained austenite having an area fraction of 2 % or more. The high strength steel sheet has a mechanical property with a uniform elongation of 6 % or more and a tensile strength of 1180 MPa or more.

The application discloses a micro-nano structure coupling distribution multi-process synergistic regulation method of an aluminum alloy plate and belongs to the field of aluminum alloys. The method comprises the following steps: preparing an aluminum alloy, melting the alloy by using a medium-frequency induction furnace under non-vacuum conditions, and pouring the alloy into a water-cooled steel mold for cooling; subsequently, sequentially performing high-temperature heat treatment to optimize solute element distribution, hot rolling deformation, high-temperature heat treatment to regulate micron-scale precipitated phase distribution, room-temperature cold rolling or ultra-low-temperature deep rolling deformation + intermediate annealing + room-temperature cold rolling or ultra-low-temperature deep rolling deformation to a final thickness, short-time high-temperature solid solution + quenching treatment; and finally, performing long-time low-temperature heat treatment to regulate nano solute atom cluster distribution. The method can effectively control the size and distribution of grains and precipitated phases in the alloy, has a significant promoting effect on the forming performance of the alloy, and can greatly improve the coordinated deformation ability of grains of different sizes and different microzones in a stamping deformation process, so that the stamping forming performance of the alloy is excellent; and the method is very suitable for manufacturing of automobile aluminum alloys.

The invention discloses an ultra-low carbon hot-rolled steel plate with good formability and a manufacturing method thereof. The ultra-low carbon hot-rolled steel plate comprises the following chemical components in percentage by weight: 0.0005-0.004% of C, less than or equal to 0.05% of Si, 0.1-1.0% of Mn, less than or equal to 0.035% of P, 0.015-0.050% of S, less than or equal to 0.010% of Al, less than or equal to 0.005% of N, 0.025-0.055% of O, 0.02-0.10% of Nb, 0.01-0.10% of Cu, 0.01-0.10% of Cr, less than or equal to 0.05% of Ni, less than or equal to 0.05% of Mo and the balance of Fe and other inevitable impurities. The steel plate has good punch forming performance and aging resistance, the elongation rate of the steel plate is larger than or equal to 40%, the aging index (AI) of the steel plate is smaller than or equal to 45 MPa, the defects of fish scaling, bubbles, pinholes, black spots and the like generated during electrostatic enameling can be completely overcome, and the machining requirements for punching, flanging, cold rolling and the like during water heater inner container manufacturing, baking tray manufacturing and the like are met.

The invention discloses a preparation method of a thin-gauge hot-dip galvanized Ti-series DX54D + Z steel strip for ultra-deep drawing. The preparation method comprises the following main process steps and process parameters: a smelting-continuous casting section production process flow; in the heating process, the in-furnace time is strictly controlled, and the tapping temperature is 1220 + / -20 DEG C; laminar cooling is adopted for rolling and cooling; pickling and rolling; the temperature of a heating section is 820-840 DEG C, the temperature of a soaking section is 820-840 DEG C, the temperature of a slow cooling section is 670-690 DEG C, the temperature of a rapid cooling section is 450-475 DEG C, the temperature of a zinc pot is 450-470 DEG C, the temperature of a top roller is less than or equal to 250 DEG C, the temperature of an inlet of a water quenching tank is less than or equal to 160 DEG C, and the temperature after drying is less than or equal to 40 DEG C; the finishing elongation is 0.8 + / -0.05%; the temperature of the zinc liquid is 460 + / -10 DEG C; the hot-dip galvanized Ti-series DX54D + Z steel strip has the characteristics of good extra-deep drawability, low yield ratio, good plasticity and the like.

This invention provides a pressure-stabilizing stamping die device for processing automotive parts, belonging to the technical field of automotive parts processing molds. The device includes an upper die plate, a lower die plate, a bottom support plate, an upper die assembly, and a lower punch assembly. A first nitrogen spring, a second nitrogen spring, and a third nitrogen spring are fixed on the bottom support plate. The first nitrogen spring is located at both ends of the bottom support plate, with its upper end connected to both ends of the upper die plate. The upper end of the second nitrogen spring passes through a drawing and pressing plate and abuts against a wear-resistant block. The first and second nitrogen springs are connected by an air pipe. The upper end of the third nitrogen spring is connected to the lower end of the drawing and pressing plate. Connecting the first and second nitrogen springs through the air pipe enables coordinated adjustment of the stamping pressure. When the downward pressure of the upper die plate is too high, nitrogen can flow between the two nitrogen springs, reducing the pressure of the corner pressure plate in the reverse direction, effectively preventing the material from failing to flow into the cavity due to excessive pressure.

The invention provides a preparation method of a hot-dip galvanized coating steel plate. A smelted and cast steel plate blank is subjected to hot continuous rolling and cold continuous rolling to control the plate shape of the steel plate; initial nucleation and growth of gamma-oriented texture grains are promoted through continuous annealing, so that the strip steel obtains good deep drawability; after hot galvanizing is conducted on the strip steel, flattening treatment is conducted to guarantee the steel plate shape; the coating film is prepared on the surface of the hot-dip galvanizing layer, so that the coating film and the hot-dip galvanizing layer form a stable compound layer, the compound layer has excellent stamping and coating lubricating properties, and even under the conditions of high temperature and severe friction of high-speed large-deformation stamping, the coating film on the surface of the hot-dip galvanizing layer has good stamping lubricating property, so that the hot-dip galvanizing layer can be subjected to hot-dip galvanizing. Therefore, the phenomena of surface zinc layer falling and powder falling during processing are greatly reduced, the product surface quality is improved, the manual shutdown die wiping frequency is reduced, the die cleaning frequency is reduced, and the production efficiency is improved.

The utility model relates to the technical field of tea production and processing, and provides tea punch forming equipment which comprises a top plate, two first mounting frames are fixedly arranged on the outer surface of the top of the top plate, a motor output shaft drives a lead screw to rotate, and the lead screw rotates to drive a moving plate to move downwards in the direction of a sliding rod. The multiple stamping plates are driven to move downwards into the forming grooves to make contact with the surfaces of the tea leaves to be stamped and formed, meanwhile, the tea leaves in the forming grooves are stamped and formed, the production and processing efficiency of the device is improved, the strength of the stamping plates during stamping of the tea leaves is improved through reinforcing ribs, and the stamping and forming effect of the device on the tea leaves is better; the electro-hydraulic push rod power supply system is turned on to start the electro-hydraulic push rod, the electro-hydraulic push rod pushes the ejector plate to slide upwards along the surface of the forming groove, the formed tea is pushed out of the inner surface of the forming groove, damage to the tea shape caused by manual taking-out of the formed tea is avoided, and the quality of the formed tea produced by the device is improved.