45results about How to "Lower the holding temperature" patented technology

The invention relates to an in-situ warm-mixing regenerant for a bituminous pavement, and a preparation method and a construction method of the in-situ warm-mixing regenerant. The strength of a cold-regenerating mixture is longer in formation time; a finish coat in a certain thickness is required to be paved additionally; the property of the regenerated mixture is poorer; a lower level cold mixing technology is used generally; and cement is required to be added generally, so that the durability of the level is reduced. The in-situ warm-mixing regenerant for the bituminous pavement comprises the following raw materials in parts by mass: 10-30 parts of naphthenic hydrocarbon, 20-40 parts of furfural extract oil, 30-50 parts of deionized water, 10-20 parts of microwave absorption agent, 5-10 parts of surfactant, 5-10 parts of dispersing agent and 1-5 parts of antiaging agent. According to the in-situ warm-mixing regenerant, the preparation method and the construction method, the mixing cost can be lowered; the construction efficiency is improved; a use ratio of old materials is increased; compared with in-situ heat regeneration, the ageing of a bituminous mixture is reduced; the service life of the pavement is prolonged; a cooling rate is reduced; the discharge amount of harmful gas and dust is decreased; new aggregates and new bitumen are not required to be added; and the material cost is lowered.

The invention discloses a heat preservation control method for an electric rice cooker, belongs to the technical field of kitchen cooking, and solves the problem of food hardening and yellowing caused by long-time heat preservation of an existing electric rice cooker. The electric rice cooker comprises a control unit, a heating apparatus and an inner pot, wherein the heating apparatus comprises a bottom heater for heating the bottom of the inner pot and a side heater for heating the side part of the inner pot. According to the heat preservation control method, the control unit controls the bottom heater and the side heater to alternately perform heat-preservation heating according to a set heat preservation temperature after the electric rice cooker enters a heat preservation stage. The heat preservation control method is used for the electric rice cooker to perform food cooking such as rice cooking, congee cooking and the like.

The invention discloses a construction method of a warm mix asphalt concrete pavement of a municipal road. The construction method comprises the following steps: 1, reforming and adjusting the traditional mixing equipment; 2, determining the construction temperature of a warm mix mixture; 3, mixing the mixture; 4, transporting the warm mix mixture to the construction position; 5, paving the warm mix mixture; 6, compacting the paved warm mix asphalt mixture. Compared with the prior art, the construction method has the beneficial effects that the mixing cost and production consumption of the asphalt mixture are lowered, the ageing is alleviated, the pavement performance is improved, the emissions of harmful gas and dust are reduced, the environmental pollution is lowered, and the working environment quality of a worker is improved.

The invention provides a control panel and a control method of a cooking utensil and the cooking utensil. The control panel is arranged on a pot body of the cooking utensil; the control panel comprises a first area and a second area, wherein the first area is provided with a setting button, and the setting button is used for triggering the cooking utensil to enter a working state setting mode of arefrigerating device of the cooking utensil; the second area is used for displaying the working state of the refrigerating device. According to the technical scheme provided by the invention, a usercan set the working state of the refrigerating device through the control panel according to the actual requirements, so that food in the cooking utensil can be cooled through the refrigerating device, and thus the use experience of a user is promoted.

A resin-rich epoxy glass powder mica tape consists of two layers of electrical alkali-free glass cloth, a mica layer and adhesive, wherein the mica layer is arranged between the two layers of electrical alkali-free glass cloth, and the adhesive is used for bonding the two layers of electrical alkali-free glass cloth and the mica layer together. The mica tape has the characteristics of decreasing the preserved molding temperature, shortening the molding temperature preservation time, greatly increasing the processing efficiency by 30 to 50 percent, shortening the motor production period, reducing energy consumption, and the like, and can better meet the requirement of the resin-rich molding production technique for large high-voltage motors and generators.

The invention provides a forging method of nickel base alloy containing copper and the nickel base alloy containing copper and belongs to the technical field of forging technologies. The forging method overcomes the defects that because copper is added to the nickel base alloy, the hot working character is poor, and forge cracking is caused, and the yield can be effectively improved. The forging method comprises the steps of conducting billet forging, wherein preprocessed nickel base alloy ingots containing copper are placed in a heating furnace, the nickel base alloy ingots containing copper are heated to the temperature T1, the temperature T1 is kept, forging is conducted according to the forging ratio y1, so that forging stocks are obtained, the temperature T1 is 1120+/-10 DEG C, and y1 is smaller than or equal to 1.4; conducting initial forming, wherein the forging stocks are arranged in the heating furnace to be heated, the temperature is kept, and forged pieces which are initially formed are obtained through forging; conducting final forging, wherein the initially formed forged pieces are arranged in the heating furnace to be heated to the temperature T3, the temperature T3 is kept, forging is conducted according to the forging ratio y3, so that finished forged pieces are obtained, the temperature T3 is higher than 1000 DEG C and lower than 1080+/-10 DEG C, and y3 is larger than 1.5 and smaller than 2. The forging method can be used for forging of the nickel base alloy containing copper.

The invention discloses a preparation method of a Cu-Cr-Zr wear-resistant alloy wire. The method comprises the following steps: S1, powder metallurgy: firstly, preparing a Cu-Cr alloy or Cr-Zr alloy or Cu-Cr-Zr alloy or a combined alloy thereof into powder with the diameter of 50-300 [mu]m, then, carrying out dry pressing or sintering on the powder to prepare a block material, and finally, crushing the block material into particles with the size of 1-10 mm for later use; and S2, smelting: firstly, smelting 50-90% of cast ingot raw materials into an alloy solution under a vacuum condition at the smelting temperature of 1,200to 1,370 DEG C, keeping the vacuum degree at 10<-2> to 10<-5>MPa, keeping the temperature at 1,200 to 1,300 DEG C after complete smelting, and refining to remove impurities and gas. According to the process, the wear-resistant alloy wire with higher tensile strength, better wear resistance, better corrosion resistance and higher conductivity can be prepared, it can be seen from the microscopic structure of the product that the second phase is distributed in a dispersed mode, and the wear resistance and the mechanical property of the material are well improved.

The invention discloses an advanced double-modification method for austenitic manganese steel. The method comprises the following steps that: after ferromanganese is added to molten steel for the fine adjustment of manganese content, Re-containing rare earth alloy accounting for 0.067-0.081 percent of the weight of the molten steel and vanadium slag accounting for 2.0-2.5 percent of the weight of the molten steel are orderly added to a molten pool; aluminum accounting for 0.15-0.20 percent of the weight of the molten steel is added in before the tapping of the molten steel; calcium silicon accounting for 0.04-0.06 percent of the weight of the molten steel, Re-containing rare earth alloy accounting for 0.133-0.169 percent of the weight of the molten steel, ferrotitanium accounting for 0.02-0.03 percent of the weight of the molten steel, as well as zinc accounting for 0.006-0.008 percent of the weight of the molten steel are added to a steel ladle outside a furnace. The comprehensive mechanical property and wear resistance of austenitic manganese steel are improved through double modification.

The invention provides a volatile insulation box for cooling and insulation of a cold fresh product. The volatile insulation box comprises a box body and a box cover, wherein the box body and the box cover can be formed only by water-absorbing and water-volatilizing foam for one-time use, or by combining a vacuum box body and a vacuum box cover for repeat use; the vacuum box body comprises a box body vacuum inner container and a layer of water-absorbing and water-volatilizing foam coating the box body vacuum inner container; and the vacuum box cover comprises a box cover vacuum inner container and a layer of water-absorbing and water-volatilizing foam coating the cover vacuum inner container. Before use, the volatile insulation box is immersed in cold water, and thus a proper amount of water is absorbed by the foam; after the volatile insulation box is filled with the cold fresh product, the box cover is closed; the water absorbed in the foam can be volatilized in a natural environment; in the water volatilizing process, heat of the foam is absorbed, the temperature of the foam is lowered, and then the volatile insulation box is cooled; if the water is volatilized thoroughly, the cooling function of the foam is converted into the insulation function; and as the effects of cooling, insulation and prolonging of an insulation period are achieved, the volatile insulation box can be widely used.

A boiling fluidization drying apparatus comprises an upper bed body, a middle bed body and a frame. An air outlet is arranged on the top face of the upper bed body. A feed port and a discharge chamber are respectively arranged at the front face and the back face at the lower portion of the upper bed body. A fine powder reflux pipe inserted from the top face is arranged in the upper bed body. The middle bed body is divided into a plurality of drying chambers along the front-and-back direction by a baffle plate. An opening is arranged at the lower portion of the baffle plate. An air duct is formed. A hole plate is arranged at the connection of the middle bed body and the lower bed body. The lower bed body is a wind division apparatus. The wind holes on the hole plate are fishscale holes and arranged in a row orderly. The direction of the air outlets of the wind hole in the same row is consistent. The hole rows are arranged at intervals at the back left portion and the back right portion of the air outlet. An included angle exists between the projection of the air outlet of the wind hole on the hole plate and the central line of the hole plates at the front-and-back direction. The invention has good drying effect and is especially suitable for drying the thermal sensitivity materials.

The invention relates to a method for ultralow dust emission of a heating furnace in a low-temperature heat preservation state. The method comprises the following specific steps of additionally arranging a variable-frequency fan on the heating furnace, and starting the variable-frequency fan in the low-temperature heat preservation state; adjusting the frequency of the fan to be below 33 Hz, and reducing the rotating speed of the fan to 950 rpm; reducing the jet velocity of a burner by over 20 percent, and enabling the burner to be in an oxygen-deficient combustion state; and after the parameters are adjusted, reducing the dust concentration by 0.5-1 mg/Nm<3>, reducing the oxygen content in flue gas to be below 19 percent, and performing flue gas emission of the heating furnace in the low-temperature heat preservation state. The method for the ultralow dust emission of the heating furnace in the low-temperature heat preservation state has the advantages that the method is convenient tooperate and control, the ultralow dust emission of the heating furnace in the low-temperature heat preservation state is realized, the heat preservation temperature of the heating furnace is reduced,and the method is environmental-friendly and energy-saving.

The invention discloses a preparation method of 1300MPa-grade rare earth reverse transformation Q & P steel. The steel comprises the following chemical components in percentage by mass: 0.12%-0.18% ofC, 2.0%-3.0% of Mn, 0.8%-1.2% of Si, 0.6%-1.0% of Al, 0.05%-0.08% of V, 0.001%-0.003% of B, 0.02% or below of P, 0.01% or below of S and the balance of Fe and inevitable impurities. According to thecomponent design, a certain amount of mixed rare earth iron alloy is added, smelting is conducted to obtain a casting blank. A reverse transformation process is combined with a Q & P process, so thatthe austenite stability is improved. The Si content is low, so that the surface quality and the hot rolling performance are guaranteed. The hardenability is improved through the Al and the B, a certain amount of the V is added, a dispersedly-distributed second phase is introduced, and the work hardening capacity of ferrite is enhanced through matching of the V and the Si. By adding the proper amount of the rare earth, the modification effect is achieved, grains are refined, and the comprehensive mechanical property of the steel plate is improved. According to the steel plate produced by the method, the microstructure is martensite, ferrite, retained austenite and the dispersedly-distributed second phase, the tensile strength is larger than 1300 MPa, the percentage elongation after fractureis larger than 15%, and the steel plate has good strength and plasticity matching.

The invention provides a heat treatment method for preventing 2A12 aluminum alloy parts from solid solution overburning. The heat treatment method comprises the following steps of heating the 2A12 aluminum alloy parts to 440-480 DEG C, and keeping the temperature for 10-40 minutes; then heating to 485-495 DEG C at a heating rate of 0.4-1.2 DEG C per minute, and keeping the temperature for 60-120 minutes; and finally, using water to cool the aluminum alloy parts to room temperature, wherein transfer time of entering water is not more than 10 seconds and the water temperature is 20-60 DEG C. Theheat treatment method for preventing the 2A12 aluminum alloy parts from solid solution overburning has simple operation, not only can prevent the 2A12 aluminum alloy parts from solid solution overburning, but also can reduce energy consumption and improve the performance of 2A12 aluminum alloy products.

The invention discloses a low-temperature normalizing heat treatment method for No.45 steel, and relates to the technical field of heat treatment. The low-temperature normalizing heat treatment methodincludes the steps of salt bath liquid preheating, workpiece salt bath heat preservation, ultrasonic treatment, air cooling and the like. According to the method, an ultrasonic field with a certain vibrational frequency and power is introduced in the normalizing heat preservation process of the No.45 steel, the normalizing heat preservation temperature can be lowered, heat preservation time required in the austenitizing process is greatly shortened, normalizing efficiency is improved, normalizing heat treatment tissue is improved, and the overall performance of the No.45 steel is also improved.