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

The present invention discloses one kind of ultra-high strength steel with excellent corrosion resistance and fatigue resistance and its making process. The ultra-high strength steel consists of C 0.05-0.12 wt%, Si 0.05-0.50 wt%, Mn 1.10-1.70 wt%, P not more than 0.015 wt%, S not more than 0.010 wt%, Nb 0.025-0.070 wt%, V 0.005-0.080 wt%, Mo 0.20-0.50 wt%, Ni 0.30-0.80 wt%, Ti 0.005-0.025 wt%, Cu 0.25-0.80 wt%, B 0.0005-0.0020 wt%, and Cr 0.10-0.70 wt%, except Fe and inevitable impurities. It has carbon equivalent not lower than 0.65 % and heat sensitive coefficient not lower than 0.30 %. Its making process includes the steps of smelting, desulfurizing molten iron, combined blowing in converter, vacuum treatment, casting into plate blank, etc. It has yield strength not lower than 880 MPa, tensile strength not lower than 980 MPa and V-shaped notch Charpy absorbed-in-fracture energy at -20 deg.c not lower than 100J.

The invention discloses a process for preparing flame retarding cellulose viscose, which adopts pyrophosphate exchange reaction flame retardant particle whose mean particle diameter is <= 1.0um, non-ionic surface active agent, dispersing agent and solvent water to mix and obtain flame retardant emulsion, each percentage by weight is pyrophosphate exchange reaction flame retardant 20-45 wt%, non-ionic surface active agent 5-10 wt% and dispersing agent 0.5-1.0 wt%, and residue is solvent water. The process for preparation comprises adding pyrophosphate exchange reaction flame retardant of flame retardant emulsion which is corresponded to alpha cellulose 15-30 % into spinning original liquid which is filtered to mix, shaping spinning by adopting spinning bath which is low acid, low salt, low temperature and high zinc. The spinning original liquid of the invention has simple and convenient preparation, fiber does not contain halogen elements, which avoids environmental pollution, when in burning, the invention is not melted, while charring only happens to keep the original shape of fiber, the invention prevents dripping which is melted in high temperature from scalding human body, and flame retardant is distributed evenly in adhesive, which can not smolder after leaving fire and easy to be self-extinguished.

The invention provides a high-intensity low-stretchability polysulfonamide high-temperature-resisting membrane filter material and a preparation method thereof. The filter material disclosed by the invention is formed by compounding a PTFE (Polytetrafluoroethylene) high-compactness microporous membrane layer and a punched felt in sequence from top to bottom. The punched felt is formed by compounding a first polysulfonamide fiber surface layer, a high-intensity low-stretchability base cloth layer and a second polysulfonamide fiber surface layer in sequence from top to bottom. The preparation method comprises steps of: preparation of the punched felt, high-temperature thermoforming, singeing and pressing treatment, full-saturation immersion treatment, predrying, baking curing, and high-temperature high-pressure coating with the PTFE high-compactness microporous membrane. The high-intensity low-stretchability polysulfonamide high-temperature-resisting membrane filter material has high intensity and low stretchability, longitude and latitude strengths are both larger than 3000N / 50mm; the longitude and latitude elongations at break are both smaller than 10%; and the filter material can resist a high temperature grade of 250 DEG C and has high corrosion resistance, good oxidization resistance, smooth surface, high deashing efficiency and wide application range.

The invention provides a formula for preparing a regenerated concrete block material by using high activity regenerated powder and a regenerated aggregate. The invention further provides a productionmethod of the regenerated concrete block material based on a system of 'regenerated powder-regenerated coarse aggregate-regenerated fine aggregate'. The regenerated concrete block material prepared byusing the system of 'regenerated powder-regenerated coarse aggregate-regenerated fine aggregate' has excellent mechanical strength, the strength level range is 5-50 MPa, and the requirements of the concrete block material strength under different working conditions are met. The invention provides a novel developing route for the resource recycling of construction wastes. The performance of the regenerated powder is similar to the performance of mineral admixture such as fly ash and the like, the activity is higher, secondary hydration reaction of a cement-based material can be promoted to relieve the current situation of insufficient supplying of mineral admixture such as fly ash and the like, and the regenerated concrete block material has higher economic benefit and social benefit.

A method for manufacturing the high-strength (500 MPa) threaded reinforcing bar includes such steps as providing 20MnSi steel bullet at 880-950 deg.C, cogging, middle rolling, pre-cooling by passing through water curtain, final rolling, cooling by passing through water curtain, and air cooling to release heat from its core for self tempering.

The invention discloses a method for preparing a block superfine / nanocrystal alloy with controllable grain size and bimodal distribution. The method comprises the following steps: firstly, a biphase eutectoid or eutectic is selected and calculated according to a phase diagram combined with a lever rule, and the proportion of a primary eutectoid phase or a primary eutectic phase is quantitively controlled through reasonable selection of alloy compositions; secondly, after the alloy compositions are selected, alloy compositions undergo solution heat treatment and then are cooled, and the size of the primary eutectoid phase or the primary eutectic phase is controlled; thirdly, the alloy structure is thinned through violent plastic deformation or general plastic deformation, and then complete superfine crystal or nanocrystal alloy is obtained; and fourthly, the alloy obtained undergoes short-time annealing under the condition that the temperature is higher than the recrystallization temperature of the primary eutectoid phase or the primary eutectic phase, and then the block superfine / nanocrystal alloy with the controllable grain size and the bimodal distribution structure is obtained. The method realizes controllable grain size and bimodal distribution in the eutectoid or eutectic alloy, quantitively and precisely controls the proportion and the distribution of microcrystals, adopts the technological combinations of design of the alloy compositions, solid phase-transition treatment, plastic deformation and annealing for the first time, and is simple and easy to realize.

The present invention relates to a light heat-insulating sound-proof partition wall board and its production method. It is made up by using cement, light asbestos wool, light stone granules and polypropylene fibre through a certain production process. Besides, said invention also provides the concrete steps of said production process.

The invention relates to a manufacturing process of a stator, which comprises the following steps: (1) blanking: adopting a numerical control band sawing machine to carry out blanking with a verticality being smaller than or equal to 0.3; (2) annealing: adopting a well type vacuum annealing furnace to vacuumize and fill nitrogen for protection and annealing with an oxidation and decarbonization jersey knit being smaller than or equal to 0.1 and material hardness HB of 113-120 after the annealing; (3) blank preparing: adopting an ordinary C6130 lathe to prepare a blank by controlling a height error within 0.3; (4) lubrication process; (5) hole extruding: adopting an ordinary 4000KN oil press to extrude with extruding force P of 280T, an extruding hole diameter phi of 39+ / -0.05 and an extruding depth of 70+ / -0.5mm by reserving 5-6mm at the bottom of the hole after extruding with hole wall roughness of 1.6; and (6) gear extruding: adopting a 4000KN oil press to extrude with the extruding force P of 300T, gear accuracy of + / -0.03 and an extruding depth of 80+ / -0.5mm.

The invention provides a steel fiber reinforced ultra-high-performance concrete synergistically prepared by multiple solid waste and a preparation method of the steel fiber reinforced ultra-high performance concrete, and belongs to the technical field of solid waste resource utilization. The steel fiber reinforced ultra-high-performance concrete is prepared from the components in percentage by weight: 35%-50% of a binding material, 35%-50% of an aggregate, 0%-3% of a water reducing agent, 5%-8% of a steel fiber and 7%-9% of water, during preparation, firstly slag, heat stewing converter slag,refining slag and industrial by-product gypsum are separately ground or ground in a mixed mode, and the binding material is prepared through even mixing; and then after the binding material, the skeletal material, the water reducing agent, the steel fiber and the water are stirred evenly in percentage by mass, casting molding is conducted and maintenance is conducted, and the steel fiber reinforced ultra-high-performance concrete synergistically prepared by the multi-solid waste is obtained. According to the steel fiber reinforced ultra-high-performance concrete and the preparation method, theultra-high-performance concrete with compressive strength of 100 MPa to 160 MPa and flexural strength of 35 MPa to 45 MPa in 28 days under the standard curing condition is prepared, the utilization rate of the solid waste in the ultra-high-performance concrete is increased significantly, the cost is lowered, and obvious environmental and economic benefits are achieved.

The invention relates to a low-temperature, high-intensity, high-toughness steel and the making method thereof, applicable to the environment down to -60 deg.C, adopting low-carbon Cr-Ni-Si-Mn-Mo-V alloy, and its chemical composition includes in mass percent (mass%): C: 0.16-0.24,Si:1.0-1.4, Mn:1.10-1.50,Cr:0.80-1.20,Ni:1.00- 1.40,Mo:0.20-0.40,V:0.05-0.20,S=<0.035,P=<0.035,Cu =<0.050, and the rest Fe. And its making method comprises: (1) smelting; (2) forging: heating at 1280-1320deg.C, where initial forging temperature: 1100-1250deg.C, final forging temperature >=850deg.C; annealing after forging, where heating temperature: 700+-30deg.C, and tapping temperature =<300deg.C; (3) thermal treatment: normalizing: air cooling at 930-950deg.C; tempering: air cooling at 790-720deg.C; quenching: oil cooling at 900-930deg.C; and tempering: air cooling at 200-260deg.C; (4) supersonic crack detection and magnetic particle crack detection. And it is especially applied to the materials for flying rings, hocks, pin shafts, etc, in the lifting systems of mechanical facilities.

The invention relates to a method for preparing metallurgical coke. The method comprises the following steps: 1) taking blended coal, waste resin and dry quenching dedusting powder as raw materials; 2) intensively recovering the waste resin, and grinding the waste resin to make the particle size less than 3 mm; 3) fully mixing the waste resin with the dry quenching dedusting powder according to amass ratio of 1:1 to 1:5, and carrying out matching pelletizing to make the ball diameter be 1-3 cm; 4) respectively crushing and mixing various coal types in the blended coal, wherein the mass proportion of the average maximum reflectivity, in the interval range of 1.05-1.35%, of vitrinite in the blended coal is not lower than 45%; and 5) mixing the mixed balls of the waste resin and the dry quenching powder with the blended coal, and coking the obtained mixture in a coke oven, wherein the bending mass percentage of the mixed balls is 1-3%. The method achieves recycling of carbon-containing solid wastes of iron and steel enterprises, realizes complete recycling of the waste resin according to the characteristics of low dust, low sulfur and high iron of the waste resin, and achieves the effect of effectively improving the quality index of the coke through reasonable blending of the waste resin in a coal blending coking scheme.

The invention provides a method of regulating and controlling the air volume of a sintering machine by using a main ventilation valve and the rotating speed in a combined mode, and belongs to the field of metallurgical production. The opening degree of an inlet baffle of a draught fan is regulated to 14%-65%, and the rotating speed of the draught fan is regulated to 700-1000rpm. By means of the method, the temperature of sintering flue gas can be effectively stabilized, the frequency of abnormal vibration, caused by the excess temperature of the flue gas, of a main ventilation draught fan is reduced, and threats to operation of a flue gas desulfurization and denitrification system caused by the excess temperature of the flue gas can be reduced.

This invention relates to a self-leveling inorganic floor material. The material is composed of cement 50-100 wt. parts, sand 200-400 wt. parts, and heavy weight calcium carbonate 100-300 wt. parts. The material is also composed of tackiness agent 10-20 wt. %, polymer emulsion 10-30 wt. %, and water reducer 0.7 wt. %. The material can be used for retarding floors, and has such advantages as high adhesiveness, high water resistance, and good waterproof effect. The material can be manufactured into floors with different colors, and used in moisture environment.

The invention discloses silicate cement prepared from solid wastes and a preparation method of the silicate cement and belongs to the technical field of building materials. The silicate cement is prepared from the raw materials: clinkers, gypsum, slag, tailings and building wastes by adding a chemical excitant. The silicate cement is prepared from the following raw materials in percentage by weight: 40-60% of clinkers, 5-12% of gypsum, 8-15% of slag, 10-25% of tailings and 20-45% of building wastes, wherein the use level of the chemical excitant is 0.02-0.08% of the total weight of the raw materials; the slag is slag without metallic iron; the tailings are wastes left by exploiting a mine; the building wastes are building waste bricks or concrete plate blocks without metals or other impurities. The silicate cement disclosed by the invention is widely applied to concrete and cement products, relieves increasingly deficient clinker firing resources and reduces discharge of carbon dioxide of cement, thereby facilitating reduction of severe haze in atmosphere. primary resources are saved and replaced, so that the circular economy development is promoted and the pollution is reduced to protect the ecological environment. In the production process, further pollution on the environment is not generated.