34results about How to "Simple production process control" patented technology

The invention discloses a high-strength hot rolled steel strip with improved zonal structure by manganese reduction and a manufacturing method thereof. The high-strength hot rolled steel strip comprises the following chemical components in percentage by weight: 0.14-0.17% of C, 0.15-0.35% of Si, 0.40-0.60% of Mn, at most 0.020% of P, at most 0.010% of S, 0.040-0.060% of Ti and 0.020-0.040% of Alt. The manufacturing method comprises the following steps: 1) smelting and continuous casting: smelting molten steel according to preset components, and casting into a continuous casting blank; 2) rolling: the heating temperature is controlled at 1240-1280 DEG C, the holding time is greater than or equal to 180 minutes, the finishing temperature of the recrystallization zone is greater than or equal to 1020 DEG C, and the finishing temperature of the non-recrystallization zone is controlled at 830-870 DEG C; and 3) cooling after rolling: after carrying out hot rolling on the steel strip, cooling to 560-640 DEG C at the cooling rate of 15-30 DEG C / s, coiling, and cooling to room temperature. The invention has the advantage of simple component design; the reduction of Mn content in steel is combined with technical control to improve the zonal structure of the hot rolled steel strip and ensure the zonal structure grade to be at most Grade 2.0, thereby enhancing the cold forming property; and no noble alloy elements are added, so the production cost is lower.

The invention discloses F-shaped steel for magnetic levitation rails with high magnetic flux density and a production method thereof. The F-shaped steel contains the following components by weight percent: 0.04-0.07% of C, 0.08-0.20% of Si, 0.5-0.8% of Mn, less than or equal to 0.015% of P, less than or equal to 0.015% of S, 0.015-0.030% of Nb, 0.03-0.05% of Als and the balance of Fe and impurityelements. According to the invention, the F-shaped steel for magnetic levitation rails with high magnetic flux density and excellent mechanical properties is acquired in the manner of designing steelcomponents, controlling quantity and size of impurity grains in the steel-making process and supplementing by high-temperature quick rolling so as to solidly dissolve alloying elements in steel and accelerate quick growth of crystal grains. According to the invention, the magnetic flux density of F-shaped steel is greatly increased and is 15% higher than that of present F-shaped steel.

An optical recording carrier including, in a data recording area, a continuous-grooved main track (12) for recording primary data to be stored, and a subtrack (13) for recording control data including parameter data and address information. The control data includes a clock signal needless to be provided by the main track (12). The subtrack (13) has a narrower full width at half maximum (FWHM) and a shallower depth than the main track (12). The distance (d') between the main track (12) and the subtrack (13) is not more than half of that between two adjacent main tracks (12). The main track (12) and the subtrack (13) form a double-spiral pattern. When recording data, a recording spot tracks mostly along the centerline of the main track (12) and reads the control data in the subtrack (13) simultaneously to control the recording process. A method for manufacturing a recordable optical recording carrier compatible with a conventional CD-R is also provided.

The invention discloses a lead-core type explosive element and a basic detonator composed of the explosive element. The lead-core type explosive element comprises an inner tube, a lead core part and aloose ignition charge. The lead core part is positioned in the upper part of the inner tube, the loose ignition charge is positioned below the lead core part in the inner tube, the basic detonator comprises a metal tube shell, and a grain charge, a loose charge and a lead-core type explosive element are sequentially arranged in the metal tube shell from bottom to top, and a delay body, an electronic ignition element or a detonating tube are additionally arranged above the lead-core type explosive element. The basic detonator does not need a primary explosive, and the problems of potential safety hazard, environmental pollution and high cost of the primary explosive are solved. The special tube shell and inner tube are not required, and the assembly process is simple; the phenomenon that detonators explode incompletely during inverted initiation is eliminated; and therefore, the primary explosive-free basic detonator of the invention has the advantages of high reliability, simple quality control, safety, environmental protection, economy and practicality.

The invention discloses a manufacturing method for a low-cost long-period fiber bragg grating. The method is characterized by the following steps: setting a sealed container; dividing the sealed container into upper and lower parts by a cover plate; adding a corrosion solution into the lower part; forming an optical fiber insert hole in a side wall of the upper part; forming a micro-hole on the cover plate; exposing a cladding layer of an area, into which the grating is to be written, on the optical fiber; inserting into the sealed container; fixing one end of the optical fiber on a linear moveable platform; volatilizing the corrosion solution and releasing gas from the micro-hole; performing corrosion reaction between the cladding layer right above the micro-hole on the optical fiber and the gas, thereby forming a deep corrosion groove; periodically moving the horizontal position of the optical fiber by the linear moveable platform; lastly, forming periodically distributed deep corrosion grooves on the surface of the optical fiber, thereby forming the long-period fiber bragg grating. The manufacturing method for the low-cost long-period fiber bragg grating provided by the invention has the advantages of requiring no grating corrosion for mask plate and low manufacturing cost, is suitable for batch manufacturing and is suitable for various optical fibers.

The invention discloses a production method of vanillin-1,2-propylene glycol acetal. The production method comprises the following steps: firstly, cleaning a reaction still, dehydrating the reaction still and a condensing device thereof so as to enable the water content of the reaction still to be lower than 500 ppm; secondly, adding raw materials vanillin and 1,2-propylene glycol into the reaction still; thirdly, adding an acidic substance as a catalyst into the reaction still and uniformly stirring; fourthly, vacuumizing the reaction still and enabling the reaction still to be in a certain negative pressure state; fifthly, raising the temperature of the reaction still to required temperature and reacting at the required temperature for a certain time; sixthly, carrying out sampling detection on a reaction product, adding a certain amount of alkaline raw materials into the reaction still to neutralize the catalyst after the reaction product is qualified by detecting; seventhly, carrying out reduced pressure distillation on the unreacted 1,2-propylene glycol and finally distilling and collecting to obtain qualified vanillin-1,2-propylene glycol acetal. The reaction time of the production method disclosed by the invention is 3 to 8 hours; compared with the prior production method, the production method disclosed by the invention has the advantages that reaction time is greatly shortened; in addition, the use of an organic solvent benzene is avoided and further environment friendliness is realized.

The invention relates to the field of macromolecular materials and particularly relates to waterborne polyurethane and a preparation method and application thereof. The preparation method comprises the steps: subjecting an HDI trimer or IPDI trimer to a polymerization reaction with polyethylene glycol, then, subjecting the product to a reaction with hexamethylene diisocyanate or isophorone diisocyanate so as to form an isocyanate terminated tri-functionality polymer, and regulating the viscosity of the isocyanate terminated tri-functionality polymer with acetone; subjecting HDI or IPDI to a reaction with a binary alcoholic monomer and a hydrophilic monomer so as to obtain a linear aqueous polyurethane prepolymer, and regulating the viscosity of the linear aqueous polyurethane prepolymer with acetone; subjecting the isocyanate terminated tri-functionality polymer and the linear aqueous polyurethane prepolymer to a cross-linking reaction under the action of a chain extender, and removingthe acetone, thereby obtaining the waterborne polyurethane. After the waterborne polyurethane prepared by the preparation method forms a film, the softness is relatively good, finished, compliant andsoft surface touch feeling of leather is achieved, and meanwhile, the physical properties are relatively good.

The invention relates to a super-thick steel plate with obdurability matching and excellent high-temperature performance and a manufacturing method thereof. The method comprises the following steps: adopting a component system of low alloy steel with medium C, high Mn and medium N as a basis; properly improving the acid soluble Als content in the steel and controlling the range of the content; controlling the ratio of Mn equivalent weight to C to between 10 and 20; alloying Cu, Ni, Cr, Mo and V; performing Nb and ultromicro Ti treatment, wherein the ratio of Nb to Ti is more than or equal to 1.50; performing Ca treatment, wherein the ratio of Ca to S is between 1.00 and 3.00; and optimizing the process of controlled rolling and subsequent heat treatment, thus the super-thick steel plate obtains excellent obdurability matching, exhaustion creep resistance, temper embrittlement resistance and welding manufacturability, in particular to excellent exhaustion creep resistance for a weldingjoint, and is particularly suitable to serve as a heat resistant pressure vessel body.