8results about How to "Improve shape quality" patented technology

The invention belongs to the technical field of metal material processing, and discloses a cold rolling method for overcoming brittle fracture of non-oriented silicon steel for a new energy automobile, which comprises the following steps: S1, normalizing treatment: heating at 920-1000 DEG C for 2.5-4 minutes; s2, pickling treatment: pickling in an acidic aqueous solution, then soaking in a clean water tank, neutralizing with an alkaline aqueous solution, blow-drying and coating oil to prevent rusting; s3, heating treatment is conducted, specifically, the workpiece is placed in a box-type resistance furnace, and heat preservation is conducted for 20-120 min under the condition of 200-500 DEG C; s4, cold rolling is conducted, specifically, hot rolling is rapidly conducted on a cold-rolling mill; and S5, continuous annealing is conducted, specifically, continuous annealing is conducted at the strip steel speed of 85 m / min to 95 m / min, and the annealing soaking temperature is 920 DEG C to 1000 DEG C. The technical problem that when silicon steel cold rolling is carried out in a laboratory environment, the edge of a cold-rolled plate is cracked or brittle fracture occurs is solved.

The invention discloses a preparation method of a high-precision ultra-wide 50 steel cold-rolled steel strip, and belongs to the technical field of ferrous metallurgy. In the production process of the steel strip, the surface quality of the pickled steel strip is improved by optimizing the pickling process; the total reduction rate of cold rolling is adjusted, the problem of steel strip rolling edge cracking is eliminated, and a product is rolled to the target thickness; a process lubricating system of the rolling mill is optimized, so that the surface quality and the plate shape quality of a product are improved; and the annealing process parameters are optimized, so that the physical properties of the product are ensured. The high-precision ultra-wide 50 steel cold-rolled steel strip is successfully developed by adopting the measures of optimizing chemical components and physical properties of a cold-rolled base material, optimizing an acid pickling process, adjusting the total reduction rate of cold rolling, optimizing a rolling mill process lubricating system and annealing process parameters and the like; the problems that in the using process of a traditional steel belt, the thickness fluctuation is large, the plate shape quality is poor, and the surface quality is poor are solved.

The method for analyzing the influence of roll bending of a SmartCrown rolling mill on strip shape based on digital twinning analysis of the application comprises the following steps: Step 1: collecting strip parameters, rolling process parameters and SmartCrown rolling mill parameters; Step 2: establishing a three-dimensional elastic-plastic finite element model of the SmartCrown rolling mill and the strip according to the parameters collected in Step 1; Step 3: performing simulation experiments on the strip rolling process by using the three-dimensional elastic-plastic finite element model; Step 4: extracting the transverse thickness distribution data of the rolled strip in the stable rolling stage of each simulation experiment in Step 3, calculating the strip crown, edge thinning and strip crown weight according to the transverse thickness distribution data, and then establishing a digital twin; and Step 5: analyzing the influence of the work roll bending force and the intermediate roll bending force on the plate shape of the rolled strip according to the digital twin obtained in Step 4.

The application discloses a kind of multi-modal adaptive furnace temperature control method, system and continuous annealing furnace based on space-time thermal field decoupling, multiple independent heating zones are provided in the continuous annealing furnace, multiple groups of staggered arrangement burners are arranged in each heating zone, four-stage adaptive control strategy based on temperature ratio segmentation and thermal field space-time distribution collaborative control, including: fast response heating zone, proportional regulation transition zone, pulse cross uniform zone, dynamic thermal field maintenance zone. By decoupling furnace temperature control and thermal field spatial distribution, using the way of spatial grouping pulse activation + time staggered control, the rapid response, accurate regulation and uniform maintenance of furnace temperature are realized.The application effectively solves the technical problems of temperature overshoot, response lag, thermal field unevenness, high energy consumption and other technical problems in the traditional control mode, significantly improves the quality of strip steel heat treatment and energy utilization efficiency.

The application relates to the field of semiconductor devices and provides a preparation method of a long-wavelength VCSEL, which comprises the following steps: sequentially laminating and growing an N-InP buffer layer, a bottom DBR structure and an N-InP space layer on an N-InP substrate to form a first epitaxial wafer; taking out the first epitaxial wafer, taking photoresist as a mask, injecting H ions into the N-InP space layer by using an ion implantation technology, further passivating part of the N-InP space layer to form a passivation area, and forming a light-emitting area by the unpassivated N-InP space layer; removing the mask to obtain a second epitaxial wafer; annealing the second epitaxial wafer and cleaning the surface; sequentially laminating and growing a P-InAlAs space layer, a quantum well area, an N-InAlAs space layer and a top DBR structure on the N-InP space layer of the second epitaxial wafer to form a third epitaxial wafer; and preparing the third epitaxial wafer by using a conventional optoelectronic device preparation method to obtain a long-wavelength VCSEL device. The process is simple.

The utility model provides an extruding machine for aluminum profile processing, which relates to the technical field of aluminum profile processing and comprises a frame, an extruding plate is movably arranged on the top wall of the frame, a die is arranged on the bottom wall of the frame, a groove is arranged in the die, and a positioning piece is arranged on the outer edge of the groove. The positioning piece comprises a vertical rod and a circular piece which is elastically and movably arranged, the upper end of the vertical rod penetrates through the aluminum profile plate, and the circular piece is arranged on the periphery of the vertical rod in a sleeving mode and used for supporting the aluminum profile plate. The vertical rod in the positioning piece penetrates through the aluminum profile plate, the aluminum profile plate can be positioned, when the electric telescopic rod is started to enable the extrusion plate to move downwards to extrude the aluminum profile plate above the mold, the aluminum profile plate can be tightly attached to a groove in the mold and cannot deviate, the shaping accuracy of the aluminum profile plate can be greatly improved, and the production efficiency of the aluminum profile plate is improved. Meanwhile, after the aluminum profile plate is shaped and the extrusion plate is separated from the mold, the aluminum profile plate moves upwards and is separated from the mold, and rapid and automatic demolding of the aluminum profile plate can be achieved.

This application relates to an 1180MPa grade ultra-high strength steel and its preparation method, belonging to the field of steel manufacturing technology. The chemical composition of the ultra-high strength steel, by mass fraction, is: C: 0.04%~0.25%, Si: 0.60%~1.80%, Mn: 1.20%~3.00%, Al: 0.02%~0.10%, P≤0.005%, S≤0.002%, Ti: 0.010%~0.040%, Cr: 0.10%~0.80%, N≤0.004%, B: 0.0010%~0.0030%, with the remainder being Fe and unavoidable impurities. The microstructure of the ultra-high strength steel includes ferrite and martensite. A breakthrough in the performance of ultra-high strength steel is achieved by employing a C-Si-Mn-Cr-B composition system and a segmented cooling process. After finishing rolling, the slab is air-cooled under a temperature-controlled insulation hood, allowing it to enter the water-cooling stage within the phase transformation temperature range and complete the martensitic phase transformation at an ultra-high cooling rate. The resulting ultra-high-strength steel possesses both ultra-high strength and good ductility, while its elongation, cold bending performance, and sheet shape quality are all comprehensively improved. This method effectively overcomes the sheet shape defects, performance fluctuations, and weld softening problems of traditional methods, and is suitable for the industrial production of ultra-thin ultra-high-strength steel.

A filter forming method, comprising: after forming a first mask layer covering initial electrode fingers in an edge region, removing a partial thickness of the initial interdigital electrode on the side of the first mask layer, forming a bus bar of a bus region, and electrode fingers of a center region and the edge region, and forming a piston structure on the top of the electrode fingers at the intersection of the first mask layer and the electrode fingers in the edge region; since the first mask layer covers the initial electrode fingers in the edge region, and the projection of the first mask layer on the substrate intersects with the projection of the initial electrode fingers on the substrate, that is, the edge of the first mask layer is self-aligned with the sidewall of the initial electrode fingers in the edge region, therefore, the sidewall of the piston structure is aligned with the sidewall of the electrode fingers, which is beneficial to improve the morphology quality of the interdigital electrode, and the alignment accuracy of the electrode fingers and the piston structure, thereby improving the function of the filter in suppressing spurs.