36results about How to "Increase hardening rate" patented technology

An Al-Mg-Si based aluminum alloy sheet having undergone normal-temperature aging (or being in an underage state) after a solution treatment thereof is, before press forming, subjected to a heating treatment (partial reversion heating treatment) in which the alloy sheet is partially heated to a temperature in the range of 150 to 350 DEG C for a time of not more than 5 minutes so that the difference in strength (difference in 0.2% proof stress) between the heated part and the non-heated part will be not less than 10 MPa. The alloy sheet thus treated is subjected to cold press forming in the condition where the heated part with low strength is put in contact with a wrinkle holding-down appliance of the press and the non-heated part with high strength is put in contact with the shoulder part (radius) of the punch. In the partial reversion heating treatment, the temperature rise rate and the cooling rate in cooling down to 100 DEG C or below are set to be not less than 30 DEG C/min. Further, the period for which the alloy sheet is left to stand at normal temperature after the partial reversion heating treatment until the cold press forming is set to be within 30 days.

The invention discloses a rapid molding method of a sodium silicate sand mould and belongs to the field of rapid casting. The rapid molding method comprises the following steps: (1), establishing a three-dimensional entity model of a sodium silicate sand mould to be molded, taking the Z axis as the molding direction, and setting molding layer thickness; (2), first, paving one layer of molding sand material, and then spraying an adhesive so as to form the current layer of outline pattern, wherein the adhesive is a mixed solution of sodium silicate and polyvinyl alcohol; (3), carrying out microwave heating on the current layer of outline pattern, and forming the current layer of sand mould outline; (4), stopping microwave heating, and lowering the work table for a height of one layer thickness along the Z axis; and (5), repeating steps (2-4) until the sodium silicate sand mould is molded. The method meets the high requirement of sodium silicate sand hardened through microwave heating on the mould, solves the problems that the surface of the sodium silicate sand mould becomes powdery due to overheating and easily absorbs moisture, and further overcomes the poor feasibility, difficult molding sand storage and difficult molding sand recycling defects of the existing micro-injection bonding sodium silicate sand rapid molding technology.

The invention discloses collapse-easy water glass core sand for casting train aluminum alloy castings and a preparation method thereof. The collapse-easy water glass core sand is prepared by the following raw materials in parts by weight: 140-150 of olivine sand, 30-40 of garnet sand, 20-30 of allophane, 30-35 of siltstone, 15-20 of calcined kaolin, 8-10 of asbestos leftovers, 6-8 of beryllium oxide, 12-14 of boiling slag, 8-10 of water glass, 2-4 of sodium metaaluminate, 1-2 of cooked alum stone powder and the like. The core sand, prepared by such raw materials as olivine sand, garnet sand and siltstone enables such defect rates as sand bonding, air holes, cracks and looseness in casting of the aluminum alloy castings to be below 5%, largely improves the casting yield, and reduces the casting cost; the added sodium metaaluminate and cooked alum stone powder accelerate the hardening speed of the water glass, so that the core sand is high in strength and excellent in collapsibility, and the generation of harmful gas is reduced; and the added hydroxy propyl distarch phosphate, propylene glycol alginate and the like are attached on the surface of such raw sand as olivine sand, so that the interface strength is improved, and the green compression strength and the wet-heat tensile strength of the core sand are improved.

The present invention pertains to a chewing gum composition comprising crystalline allulose particles and optionally an aqueous allulose syrup, and to the use of allulose for increasing the hardening rate of chewing gum compositions.

The invention discloses aluminate cement and a preparation method thereof, and relates to the field of building materials. The aluminate cement comprises the following components in percentage by mass: (1) 55.0%-75.0% of aluminate cement clinker, (2) 3.0%-10.0% of barium slag, (3) 5.0%-15.0% of garnierite tailings, (4) 5.0%-15.0% of red mud, (5) 3.0%-10.0% of steel slag, and (6) 2.5%-5.0% of gypsum, wherein the content of aluminium oxide in the aluminate cement clinker is 47.0%-65.0%. The preparation method of the aluminate cement comprises the following steps: (1) preparing materials, (2) grinding, and (3) pulverizing. The aluminate cement has the characteristics of being high in hardening rate and high in hardening strength, and besides, effectively overcomes the defect that the long-term strength of the conventional aluminate cement is relatively low, and effectively uses various industrial wastes, and is a very ideal cement material.

The invention belongs to the technical field of aluminum alloy manufacturing, and relates to a production process of a 5-series aluminum alloy profile. 5-series aluminum alloy raw materials comprise less than or equal to 0.08% of Si, less than or equal to 0.3% of Fe, less than or equal to 0.1% of Cu, less than or equal to 0.1% of Mn, 2.2-2.3% of Mg, 0.1-0.2% of Cr, 0.15-0.2% of Ti, less than or equal to 0.05% of single impurity, less than or equal to 0.15% of total impurities, and the balance being Al. A round aluminum alloy cast ingot after casting is subjected to secondary homogenization treatment, the homogenization system comprises homogenization for 20 h at the temperature of 560 DEG C and homogenization for 8 h at the temperature of 300 DEG C, and the problem that the surface quality, the aluminum alloy tensile property and the corrosion resistance of the aluminum alloy profile cannot meet the requirements of customers at the same time when a conventional production process is adopted for producing the 5-series aluminum alloy profile is solved.

Disclosed are intermediate-hydration-heat composite cement and a preparation method thereof, which relate to the field of a building material. The composite cement comprises the following components, by mass: (1) 40.0-55.0% of portland cement clinker, (2) 10.0-20.0% of aluminate cement clinker, (3) 2.1-8.0% of nanometer tin oxide, (4) 5.0-15.0% of glass fiber, (5) 5.0-10.0% of silica fume, (6) 5.0-10.0% of struvite, and (7) 2.5-5.0% of gypsum. The preparation method of the intermediate-hydration-heat composite cement comprises: (1) material preparation, (2) grinding, (3) pre-mixing, and (4) powder grinding. The intermediate-hydration-heat composite cement provided in the invention is prepared by utilizing both characteristics of the portland cement clinker and the aluminate cement clinker; the early strength and long-term strength of the materials are improved via a synergistic effect among each component; the hydration heat is effectively reduced; and affects of hydration heat on the molding and properties of the cement are avoided.

This document describes a process/strategy for age hardening nickel based alloys to create desirable properties with reduced energy expenditure. The inventive process introduces isolated atom nucleation sites to accelerate the nucleation rate by approximately 36 times, thereby permitting age hardening to occur in significantly less time and with significantly less energy expenditure.

The invention discloses anti-shelling and easy-to-fill casting sand. The anti-shelling and easy-to-fill casting sand is prepared from the following raw materials: talc powder, fly ash, apatite powder,zeolite, forsterite fine powder, zinc dialkyl dithiophosphate, potassium silicon fluorate, a geopolymer prepolymer, organic bentonite, sodium tripolyphosphate, polyvinyl butyral, clay and an additiveaid. Through improvement on a formula of a system, the curing rate is increased, the hardening rate of the casting sand is increased, and the shelling tendency is reduced; through optimization of thecontent of each component, the overall strength of the casting sand can be improved, the gas generating amount of the casting sand is greatly reduced and a core defect is reduced; the casting sand disclosed by the invention has very strong anti-shelling ability, a good filling property, relatively high high-temperature strength, good rigid permeability and low gas generating amount, and can significantly reduce or eliminate shelling, the core defect and other defects, effectively improve the inner and outer surface qualities of a shell core and improve the production efficiency.

The invention discloses a preparation method of health-care salted eggs for reducing blood pressure. The preparation method comprises the following steps of S1, selecting raw materials and performing cleaning; S2, performing preserving pretreatment: putting cleaned duck eggs in organic acid, and performing soaking; S3, preparing preserving liquid: putting a traditional Chinese medicine bag in an extracting tank, adding water, performing decoction, performing filtering to obtain filtrate, adding the filtrate to a precipitation tank, performing standing, then performing centrifugation on a supernatant, performing concentration on centrifugate to obtain a material a, adding water, performing uniform mixing, performing ultrasonic extraction to obtain a material b, adding water to the material b, sorbitol, xylitol, maltitol, sodium benzoate, star aniseeds, Chinese prickly ash, cinnamon, goat bone powder, monosodium glutamate, white sugar, low sodium health-care salt and a soy sauce, performing decoction, and performing cooling to room temperature so as to obtain the preserving liquid; S4, performing preserving; and S5, performing air drying, performing sterilization and performing packing. According to the preparation method disclosed by the invention, the preparation efficiency of the salted eggs can be effectively improved, the preserving cycle of the salted eggs can be shortened, and the prepared salted eggs have the efficacy of reducing blood pressure.

The invention discloses preserving liquid of preserved eggs for reducing blood pressure, regulating the spleen and regulating the stomach. The preserving liquid comprises the following raw materials in parts by weight: 2-4 parts of potassium chloride , 15-25 parts of sodium chloride , 3-9 parts of organic acid , 3-5 parts of sorbitol, 4-8 parts of xylitol, 3-6 parts of maltitol , 3-6 parts of aethylparabenum, 1-3 parts of sodium benzoate, 2-5 parts of potassium sorbate , 2-6 parts of Chinese cinnamon, 1-4 parts of star aniseeds, 3-5 parts of garlic , 3-5 parts of Chinese prickly ash, 0.5-1.5 parts of water soluble vitamins, 8-16 parts of a traditional Chinese medicine additive and 15-20 parts of water . The preserving liquid disclosed by the invention can effectively shorten the preserving period, the preserving efficiency and the quality can be improved, and the damage of high salt content can be reduced, so that the preserved eggs prepared by the preserving liquid have the health-care efficacy of reducing blood pressure, regulating the spleen and regulating the stomach.

The invention provides a one-time forming processing method for producing a transparent plastic outer package, and relates to the technical field of one-time forming processing methods for producing transparent plastic outer packages. According to the one-time forming processing method for producing the transparent plastic outer package, the transparent plastic outer package takes polyethylene and polypropylene as raw materials, and the weight ratio of the polypropylene to the polyethylene is 3: (0.5-0.8). The drying machine is used for drying polyethylene and polypropylene raw materials, meanwhile, the drying efficiency of the raw materials is improved through arrangement of water-absorbent resin, the raw materials are fully dried in a high-frequency heating mode, and the product quality of transparent outer packages is effectively improved after moisture and volatile matter are fully volatilized. The raw materials are heated to a certain degree before entering the injection molding machine, the follow-up raw material melting time is shortened, the product machining time is shortened, the product quality is improved, the product efficiency is improved, and the injection molding machine is worthy of being vigorously popularized.

The invention discloses sulphate aluminium cement and a preparation method thereof, and relates to the field of building materials. The sulphate aluminium cement comprises the following components in percentage by mass: (1) 50.0%-70.0% of sulphate aluminium cement clinker, (2) 3.0%-8.0% of alginate fiber, (3) 10.0%-25.0% of ferro-alloy slag, (4) 5.0%-15.0% of boron slag, (5) 5.0%-10.0% of pulverized fuel ash, and (6) 2.5%-5.0% of gypsum. The preparation method of the sulphate aluminium cement comprises the following steps: (1) preparing materials, (2) grinding, and (3) pulverizing. The sulphate aluminium cement has the characteristics of being high in hardening rate and high in early strength, and besides, the condition that the long-term strength of the sulphate aluminium cement is reduced greatly is avoided, and the service life of the sulphate aluminium cement is prolonged. Besides, the preparation method for the sulphate aluminium cement, provided by the invention, adopts primary grinding and mixed pulverizing processes, the granularity of the prepared sulphate aluminium cement is relatively small, the specific surface area is relatively large, and the performance is stable.

The invention discloses a preparation method of preserved eggs in the technical field of preserved egg processing. The preparation method comprises the steps that soaking liquid and wrapping mud are prepared, the soaking liquid is prepared from, by weight, 2-5 parts of lime, 3-9 parts of plant ash, 1-4 parts of salt, 1-2 parts of black tea powder, 0.01-0.02 part of food-grade copper sulfate, 0.02-0.04 part of food-grade zinc sulfate and 50-80 parts of water, and the wrapping mud is prepared from, by weight, 5-7 parts of medical stone powder, 20-30 parts of cavings, 5-10 parts of soluble starch and a proper amount of water; the grain size of 20%-45% of the bran coat is smaller than 50 meshes. The plant ash is used for replacing sodium carbonate, the content of the sodium carbonate is effectively reduced, when the wrapping mud is manufactured, the medical stone is added into the wrapping mud, and use of food-grade copper sulfate and food-grade zinc sulfate is reduced; meanwhile, some trace elements can be supplemented, sterilization can be achieved, and the shelf life can be prolonged.