137results about How to "Raise Strength Index" patented technology

The invention provides a production process of the automobile ABS valve body material, which includes the following steps: preparing raw materials, melting, refining and standing, filtering and casting, homogenizing, ingot processing, ingot heating, indirect extruding, on-line water quenching, stretch rolling, artificial aging and finished product inspecting. By adopting the optimized alloy component in combination with indirect extrusion technology and on-line heat treatment technology, particularly the indirect extrusion technology, the inventive production process achieves the high uniformity of material structure, head-and-tail measures and mechanical property, thereby solving the problems of 6061 alloy coarse grain zone and mechanical property, increasing the production yield index, reducing the energy consumption of unit product, obtaining the material of which the mechanical property, metallographic structure, dimensional precision and the surface quality reach the advanced level of foreign similar products, achieving the import substitution of the material and laying the foundation of automobile localization.

A weldable high-strength steel hardened by ageing contains proportionally C, Si, Mn, P, S, Nb, Mo, Ni, Ti, Cu, Cr and Fe. Its preparing process includes smelting, desulfurizing, top blowing, converting, vacuum treating, casting and rolling. Its advantages are excellent mechanical performance and low-temp toughness, and high resistance to atmosphere and seawater corrosion and fatigue.

The invention belongs to the metal material technical field and the metallurgy technical field, and concretely relates to a wrought magnesium alloy with high intensity and a method for preparing an extruded material. The wrought magnesium alloy with high intensity is a Mg-Zn-(Cu or Ni)-RE-based magnesium alloy, which comprises the following ingredients by mass percentage: 2.0%-6.0% of Zn, 1.5%-6.0% of Cu or Ni, 0.1%-0.5% of Y, Nd, Gd, Ce or MM, 0-0.8% of Zr and the balance of Mg, wherein the content of impurity Fe is less than 0.005% and the density is (1.84-1.86) *10<3>kg/m<3>. The method ischaracterized in that a magnesium alloy ingot blank is semi-continuous casted by using low frequency electromagnetic oil lubrication, then performed reverse temperature extrusion and T5 heat treatment to obtain the extruded material of the wrought magnesium alloy with high intensity. The density of the extruded material of the Mg-Zn-(Cu or Ni)-RE-based magnesium alloy is (1.84-1.86) *10<3>kg/m<3>, the room temperature tensile mechanical properties after T5 heat treatment is carried out are that: the tensile strength is 390-420MPa, the yield strength ratio is greater than 0.96, the elongation percentage is greater than 7%.

The invention provides steel used for a voltage stabilizer of a pressurized water reactor power station and a manufacture method of the steel. The steel comprises the following components: 0.10 to 0.25% of C, 0.15 to 0.35% of Si, 0.80 to 0.95% of Mn, not greater than 0.010% of P, not greater than 0.010% of S, 0.50 to 0.80% of Ni, 0.20 to 0.60% of Cr, 0.005 to 0.040% of Al, 0.40 to 0.70% of Mo, 0.005 to 0.01% of V, 0.005 to 0.01% of Ti, not greater than 0.10% of Cu, and the balance of Fe. The method comprises the following steps of: 1) smelting, namely, performing continuous casting on a 70mm steel plate through a converter, and performing die casing on the steel plate of not being less than 70mm; 2) rolling, namely, heating a continuously-casted steel billet to reach the temperature of 1,150 to 1,250 DEG C; controlling the temperature of final rolling in a recrystallization area to not less than 1,000 DEG C; controlling the temperature of rolling in a non-recrystallization area to 830 to 880 DEG C; controlling the total rolling reduction to more than 70%; heating a die-casted steel ingot in a chamber furnace, wherein the temperature in heating is not less than 1,200 DEG C, and the temperature in rolling starting is not less than 1,050 DEG C; and 3) hardening and tempering, namely, quenching at temperature of 850 to 930 DEG C, and maintaining the temperature for 2 to 4min/mm; tempering at 630 to 680 DEG C, and maintaining the temperature for 4 to 10min/mm. The steel product can meet various index requirements.

The invention discloses a process for producing a battery aluminium foil. The process comprises the following steps of: (1), carrying out casting and rolling production by selecting 1070 alloyed scrap of which the scrap ratio is not more than 35%, and the rest of pure aluminium ingot to obtain a casting-rolling blank; (2), coldly rolling the casting-rolling blank to obtain an aluminium alloy belt material; (3), carrying out heat preservation on the aluminium alloy belt material at 500-560 DEG C for 8.5-9.5 hours, and intermediately annealing at 400-440 DEG C for 1.5-2.5 hours, wherein the thickness of the aluminium alloy belt material during intermediate annealing is 1.8 millimeters; and (4), rolling the intermediately annealed aluminium alloy belt material into a product with the thickness of a finished product. According to the process, the total processing rate after the intermediate annealing is increased; the work-hardening capacity of the material is enhanced; and therefore, the intensity index of the product is increased; in addition, because the annealing and temperature-increasing time is prolonged, the uniformity of the internal organization of the material is beneficial to being increased; and the process is relatively beneficial to processing of subsequent processes and the stability of the product quality.

The invention discloses steel for a pressure bearing boundary part of a steam generator in a nuclear power plant and a manufacturing method of the steel. The steel comprises 0.15% to 0.22% of C, 0.10%to 0.30% of Si, 0.55% to 0.75% of Mn, less than or equal to 0.015% of P, less than or equal to 0.010% of S, 0.30% to 0.60% of Ni, 0.70% to 1.10% of Cr, 0.80% to 1.50% of Mo, 0.020% to 0.040% of Al, 0.010% to 0.030% of Nb, 0.0005% to 0.002% of B, less than or equal to 0.05% of Cu and the balance of Fe and unavoidable impurities. A converter-continuous casting process is adopted when the thicknessof a steel plate is less than 80mm, wherein the heating temperature is 1180-1250 DEG C, the rolling starting temperature is greater than or equal to 1100 DEG C, and the rolling finishing temperature is greater than or equal to 900 DEG C; an electric furnace-die casting process is adopted when the thickness of the steel plate is greater than or equal to 80mm, wherein the heating temperature is greater than or equal to 1200 DEG C, the rolling starting temperature is greater than or equal to 1050 DEG C, and the rolling finishing temperature is greater than or equal to 850 DEG C; quenching and tempering treatment are performed on the steel plate after rolling; and the produced steel plate of 30-150mm has good high temperature performance and strong strength-toughness matching.

A pulp manufacturing method includes the steps of: filtering pulp with a screen of 80-200 meshes, and collecting short fiber size filtrate and filtered long fiber size, wherein the length of the short fiber in the short fiber size filtrate is smaller than or equal to 180 microns, and the length of the long fiber in the filtered long fiber size is larger than 180 microns; concentrating the short fiber size to enable the concentration of the short fiber size be 1%-10%; filling filler and retention aid in the concentrated short fiber size filtrate to form short fiber size; and mixing the short fiber size with the filtrated long fiber size to obtain the pulp, wherein 60% quality content of filler is absorbed on the surface of the short fiber. By means of the manufacturing method, retention rate of paper filler is improved, and simultaneously various strength indexes of paper are improved. The invention further provides the pulp, a papermaking method and body paper.

The invention discloses an ultra high strength low temperature ductile iron casting for a wind turbine generator and a manufacturing method thereof. The ductile iron casting comprises, by weight, 3.6-3.8% of C, 2.1-2.5% of Si, no more than 0.15% of Mn, no more than 0.027% of P, 0.008-0.014% of S, 0.01-0.10% of V, 0.05-0.40% of Ni, no more than 0.020% of Ti, no more than 0.025% of Cr, 0.035-0.045%of Mg residual, and the balance Fe and unavoidable impurities. The tensile strength of the ductile iron casting Rm is larger than or equal to 400MPa, the yield strength Rp0.2 is larger than or equal to 260MPa and the impact energy alpha k is larger than or equal to 10J at minus 20 DEG C. The proportional relationship of the chemical composition of the ductile iron casting is determined according to CE, Rm and/or alpha k. The ultra high strength low temperature ductile iron casting for the wind turbine generator greatly improves the strength index under the situation of ensuring the low temperature impact energy at minus 20 DEG C.

The invention discloses a manufacturing process for a bearing plate of a planetary carrier of an automobile CVT automatic transmission. The manufacturing process comprises the following steps: (1) blanking; (2) blank making before warm forging; (3) shot blasting; (4), warm forging and extrusion forming: heating a blank to 210+/-20 DEG C, coating graphite, then continuing to heat to 820-860 DEG C, firstly upsetting and extruding and then performing backward extrusion forming to form a round plate and forming a metal ring vertically extending to one side on the edge of the circumference of the round plate, and then punching a central hole of the round plate; (5) residual heat annealing; (6) blank making and shot blasting after the warm forging; (7) lubricating treatment; (8) outer tooth forming by cold forging extrusion: placing the lubricated blank into a female die, and performing cold extrusion to form an outer gear ring; and (9) nitriding, wherein an effective oxide layer on the surface has a depth of 0.007-0.3mm. The manufacturing process is reasonable in technical route, metal flows are not cut off, a tooth surface strength of the product is high, raw materials are saved, and the production efficiency is high.

The present invention discloses a microalloyed high-intensity steel used for pallet porks with a weight percentage of chemical compositions as follows: C 0.28-0.37 percent, Si 0.15-0.45 percent, Mn 1.20-1.60 percent, Cr0.25-0.65 percent, S less than or equal to 0.030 percent, P less than or equal to 0.030 percent, Ti 0.015-0.100 percent, B 0.005-0.0040 percent and the remainder is Fe. The chemical compositions still contains Ni less than or equal to 3.0 percent, V less than or equal to 0.5 percent, Nb less than or equal to 0.5 percent, Cu less than or equal to 0.5 percent and Mo less than or equal to 0.5 percent. The invention adopts the microalloyed B and Ti to improve the hardenability of the material notably, to meet the hardenability requirement of the monolithic quenching of big workpieces and promote the comprehensive mechanical property of the material greatly, so compared with the alloyed Mo steel material of the same hardenability, the precious metal Mo can be saved by 20 percent or more per ton, and the cost of the steel can be reduced by approximately 1000 yuan per ton.

The invention discloses a preparation method of tobacco sheet paper base by cabo. The tobacco sheet paper base is prepapred by taking the cabo as raw material and adopting a paper making method. The preparation method comprises the steps of dipping the cabo, grinding, beating, making sheet and drying the cabo. The beating concentration is 10%, the gap between a beating roller and a beating room is 0.2mm, and the beating pressure is 3.33N/mm; and the beating revolution is 1500-2500, and the bearing degree is 20-30 degrees SR. According to the preparation method, the optimal process condition of the beating steps is determined, the technical scheme for the comprehensive performances that the tobacco sheet paper base is prepared by utilizing the cabo again is optimized, the proper design and technical conditions of the beating degree of the cabo is determined, the excellent fiber shape and the excellent physical performance of pulp are obtained, the tensile indexes, tearing indexes, bulk, air permeability and burst indexes of the paper base product are proper, and the good quality of the tobacco which is prepared again can be ensured.

The invention provides a piece of cigarette paper with lattice fringes and a production method thereof. The cigarette paper with lattice fringes comprises a paper body, wherein a plurality of first direction pressing marks and second direction pressing marks which are intersected are pressed on the paper body through a lattice fringe stainless steel roller and a back pressure roller. According to the cigarette paper with lattice fringes and the production method thereof provided by the invention, the plurality of first direction pressing marks and the second direction pressing marks are pressed through the lattice fringe stainless steel roller and the back pressure roller to form the cigarette paper with the pressing marks of the lattice fringes, so that the novelty of the appearance of the cigarette paper is increased, the internal stress structure of the cigarette paper is optimized, and the strength index of the cigarette paper is improved.

The invention provides an automobile decorating plate having the advantages of simple structure, good usage effect, high water absorption, non-toxicity and no pollution. The automobile decorating plate comprises a leather layer, a mixed material layer I, a metal mesh and a mixed material layer II; a plurality of penetrating holes are formed on the leather layer; a plurality of containing slots are formed on the end surface of the mixed material layer I toward the leather layer; the penetrating holes are concentric to the containing slots and the inner diameters of the penetrating holes are less than that of the containing slots; and coumarin is filled in the containing slots. Various strength indicators of the automobile decorating plate can be improved effectively by the metal mesh arranged additionally. In addition, the penetrating holes match with the containing slots of the mixed material layer I so as to give out the flavor of the coumarin and effectively clamp the coumarin.

The invention relates to a production process of fine denier viscose staple fiber, and belongs to the technical field of production of the viscose staple fiber. In the spinning step, a formed silk is guided and drafted by a silk guiding device and a drafting device; and in the silk guiding and drafting process, the total drafting rate is controlled at 130-160%, wherein the spinneret drafting rate is controlled at 60-80%, the air drafting rate is controlled at 25-40% and the plastic drafting rate is controlled at 5-12%. Through selection of the total drafting rate and various drafting rate allocations, in the spinning forming process and in the plastic state, neat arrangement of cellulose macromolecules of the fine denier staple viscose fiber is facilitated, rapid and high-quality formation of a crystalline area in the fiber is facilitated, and thus the fine denier viscose staple fiber is ensured to reach a higher strength index.

The invention discloses a refining processing method for an apocynum venetum fiber. The method comprises the steps of infiltrating and activating apocynum venetum bast; performing steam explosion activating treatment; caking and putting into a cage; performing directional catalytic oxidizing; chemically degumming and post-processing. Organic amine is adopted for infiltrating and activating and steam explosion activating treatment is performed, and then a ferrite solution and an activating agent are adopted for performing directional catalytic oxidization on lignin and hemicellulose; through the organic combination of a series of technical methods, such as, infiltration and activation, steam explosion, degumming and directional catalytic oxidization, the production method provided by the invention has the characteristics of good degumming effect, excellent indexes including finish fineness, length, strength and the like of the acquired apocynum venetum fiber, high quality, excellent spinning property, and the like; the chemical consumption is low; the environment-friendly pressure is low; the technical control is simple; the consumption of the public works, such as water, electricity and gas, is low, the efficiency is high and the method is suitable for industrial production.

The invention discloses a preparation method for improving the ring pressure strength of a low-gram-weight T paper board, and the preparation method comprises the following four steps: (1) selecting raw materials, namely taking corrugated paper and offset printing periodical paper as raw materials; (2) preparing slurry, to be more specific, mixing the two raw materials obtained in the step (1) according to a ratio, carrying out crushing, impurity removal, fiber grading, heat dispersion and concentration treatment, and respectively storing long fiber slurry and short fiber slurry in respectiveslurry pools for later use; (3) preparing pulp, to be more specific, preparing surface layer pulp and bottom-layer pulp according to the proportions from the long fiber slurry and the short fiber slurry obtained in the step (2); and (4) making the T paper board, to be more specific, respectively allowing the surface layer pulp and the bottom-layer pulp obtained in the step (3) to pass through a fan pump and a pressure screen, then be conveyed to a surface layer and bottom layer pulp box pulp feeding total pipe for being loaded onto a net for forming, then enter a pressing part, a front and a rear drying part, surface sizing, a calender and the like for treatment after vacuum dewatering by a net part, and enter a winding machine, a rewinding machine and a packaging machine to obtain the low-gram-weight T paper board.