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

The invention provides a production method of a low-cost X52 pipeline steel and a pipeline steel. The production method comprises the following steps: desulphurization, converter smelting and continuous casting are conducted on molten iron to prepare a pipeline steel continuous casting billet; the pipeline steel continuous casting billet is soaked to be at 1160-1200 DEG C, and roughly rolled for 3-7 times by a roughing mill to obtain an intermediate billet; the intermediate billet is finely rolled for 4-7 times by a finishing mill; the finely-rolled pipeline steel is quickly cooled to be at 550-610 DEG C at the cooling speed of 50-100 DEG C/s, and is rolled to obtain a pipeline steel finished product. No Nb is added to the low-cost X52 pipeline steel. Through the adoption of the production method of the low-cost X52 pipeline steel, the production cost of the X52 pipeline steel can be lowered, the production technique control is easy, and the adaptability is high.

The invention discloses a steel plate for a ship structure and a manufacture method thereof. The steel plate for the ship structure comprises the following chemical components in percentage by weight: 0.10%-0.16% of C, 0.20%-0.45% of Si, 1.25%-1.55% of Mn, less than or equal to 0.015% of P, less than or equal to 0.005% of S, 0.020%-0.050% of Nb, 0.010%-0.020% of Ti, 0.030%-0.070% of V, 0.20%-0.40% of Ni, 0.015%-0.050% of Als, and the balance of Fe and unavoidable impurities, wherein Als is aluminum soluble in acid. According to the invention, the steel plate can be used for ships or offshore oil platforms; the steel plate is simple in component design and good and steady in performance and also has a good welding performance; and simultaneously, a preparation process is simple and is easy to operate.

The invention relates to a continued ironmaking device based on melting reduction of iron oxide containing carbon iron oxide balling (blocks). In the invention, the device is a continued ironmaking device based on melting reduction and can carry out continual tapping by pre-reducing furnace burden (3) through continually adding the furnace burden (3), extracting air, preheating, blasting and carrying out downstream roasting, and directly conveying the pre-reduced furnace burden (3) into a smelting-separating furnace (B) for continuous smelting-separation; a preheat area (4), a roasting area (5) and the smelting-separation areas behind the preheat area and the roasting area form a connected hearth; a combustion-supporting burner (8) and a secondary tuyere (7) are arranged also; preferably, the high-temperature coat gas generated in the smelting-separation area is subjected to secondary combustion in a pre-reduced furnace (A) for preheating and roasting the furnace burden (3); then the furnace burden (3) is discharged into the smelting-separation area for the further reduction, carburization and melting to separate the slag and iron; in the preheated area (4), the fuse passes through a bed of material to directly heat the furnace burden (3), and then the fuse enters a heat exchanging device (9) and a fuse process system; and a fan blasts the cool air below the bed into a hearth bottom (2) through the heat exchange device (9). The device has the advantages of short flow, reduced energy consumption, low carbon emission, low production cost, simple equipment, less occupied space, less investment and short building period.

The invention relates to an ultra-thick high temperature-resistant steel for a pressure vessel and a preparation method thereof. After smelting and refining, the steel is subjected to continuous casting, hot rolling, normalizing and tempering. The steel comprises the following controlled chemical components in percentage by mass: 0.08-0.15% of C, 0.15-0.40% of Si, 0.40-0.70% of Mn, 0.90-1.20% of Cr, 0.15-0.30% of V, 0.25-0.35% of Mo, at most 0.025% of P, at most 0.010% of S and the balance of Fe and inevitable inclusions. The preparation method provided by the invention comprises the steps of smelting, heating, rough rolling, finish rolling, normalizing and tempering. The invention has the characteristics of appropriate design and proportion of the chemical components, simple manufacturing process, large thickness dimension (80mm), good heat resistance, stable product performance and the like.

The invention provides a high-strength cold-rolled steel sheet with the yield strength level of 700MPa and a manufacturing method thereof. The method comprises a thin stab casting and rolling flow, a cold rolling flow, an annealing flow, a finishing flow and the like. Refined molten steel comprises the following main chemical components: 0.03 to 0.07 weight percent of C, less than or equal to 0.35 weight percent of Si, 0.40 to 2.0 weight percent of Mn, less than or equal to 0.020 weight percent of P, less than or equal to 0.010 weight percent of S, 0.25 to 0.80 weight percent of Cr, 0.06 to 0.25 weight percent of Ti and the balance of Fe and inevitable residual elements. In the annealing process, the steel is annealed in a hood-type annealing furnace in the temperature range of 500 DEG C to an A1 transition point. The manufactured high-strength cold-rolled steel sheet with the yield strength level of 700MPa has the advantages of low alloy element cost, single component, the yield strength of higher than 700MPa, the elongation rate of over 5 percent, high machinability and the like.

The invention relates to a preparation method of a light mullite brick, belonging to the field of refractory material. The light mullite brick consists of main material and filler, the main material contains the following raw materials by weight percent: 20-50 wt% of kaolin, 15-35 wt% of fine powder of calcined coal gangue and 20-50 wt% of fine powder of recycled material, and the filler contains the following raw materials by weight percent: 15-61 wt% of coal dust, 3-28 wt% of polystyrene globule, 8-30 wt% of sawdust and 5-32 wt% of waste paper pulp. The raw materials are simple in category and low in costs. The preparation method adopts the optimum scheme applying the filler, so the production process is simpler and easier to control. The coal dust and the paper pulp are added, so the cost of the fuel is reduced, and the service performance of the finished light mullite brick is ensured. The light mullite brick prepared through the method reaches the minimum volume density of 0.4g/cm<3> and the average compressive strength of being equal to or above 1.2 MPa, and the heat conductivity coefficient of the light mullite brick under at 350 DEG C is less than 0.15w/m.k.

The invention discloses a preparation method of a titanium-aluminum alloy target material. The preparation method comprises a powder mixing step, a filling step, a cold isostatic pressing step, a welding sheath degassing step, a hot isostatic pressing step, a slitting step, an alloying diffusion heat treatment step and a machining finishing step. The preparation method is simple in control, low inprocessing cost and high in processing efficiency.

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.

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 provides a manufacturing method of light wall material, according to the invention, 30-50 shares of portland cement, 2-5 shares of fibre, 60-100 shares of perlite, 10-20 shares of powder coal ash, 1-4 shares of additive and 50-100 shares of water should be mixed and stirred evenly as material slurry, 4-14 shares of vesicant should be put in, the slurry should be stirred evenly and poured in moulds, then be solidified, ejected and maintained to form the light wall material. The invention is characterized in easy getting of the material from market, especially for the adopting of Portland cement, which is capable of being gotten expediently anywhere, thereby reducing the cost greatly.

The invention provides surface layer co-extrusion winding pipe production equipment. The surface layer co-extrusion winding pipe production equipment comprises a machine frame and a working platform arranged on the machine frame. The surface layer co-extrusion winding pipe production equipment is characterized by further comprising a main extruder, an auxiliary extruder, a co-extrusion mouth die connected with a discharging outlet of the main extruder and the auxiliary extruder, a cooling device, a traction device, a pipe glue forming device, a guide wheel conveying mechanism and an automatic cutting device, wherein the main extruder and the auxiliary extruder are close to the front end of the machine frame; the cooling device, the traction device, the pipe glue forming device, the guide wheel conveying mechanism and the automatic cutting device are arranged at the rear end of the co-extrusion mouth die and sequentially arranged in the production direction of a winding pipe; the cooling device and the guide wheel conveying mechanism are arranged on the working platform; the traction device, the pipe glue forming device and the automatic cutting device are fixed to the machine frame. The winding pipe production equipment can fully automatically produce plastic winding pipes with the additional properties and is high in production efficiency; the production process is easy to control; produced winding pipe products are stable in quality; after the equipment is used, labor intensity of workers can be greatly relieved, the yield is greatly improved, and the equipment has good market development value.

The invention discloses an inner container of a polyurethane high-pressure gas storage tank, which is integrally formed and is made of a polyurethane material. And preferably, a water-based polyurethane material is adopted. In the invention, the inner container of the polyurethane high-pressure gas storage tank is integrally formed through a rotational molding process. The invention further provides a forming process of the polyurethane high-pressure gas storage tank inner container, a rotational molding method is used, and the cross-linking reaction of polyurethane is completed in the rotational molding process. The inner container of the polyurethane high-pressure gas storage tank can effectively block hydrogen, and has wear resistance, tensile strength, tearing strength and damping effect which are higher than those of nylon and polyethylene materials and high adhesion with metal accessories.