31results about How to "Slow down the temperature drop" patented technology

The present invention relates to a vertical rolling method of wide flange steel and its equipment, belonging to the field of metal rolling technology. Said method includes the following steps: billet heating, des caling, blooming, cropping and rolling so as to obtain the rolled material with web plate and flange. Said invention also provides the concrete operation steps of said rolling process.

The invention discloses a method for manufacturing a GH4169 alloy fine-grained disk billet. The original billet of GH4169 is made by heating the billet, heating upsetting for the first time, upsetting for the second time, punching and rolling. Set, use three-stage heating to process the billet, preheat the metal pad and place it on both ends of the billet, then heat upsetting, select 1020 ° C for upsetting, punching, and hole expansion, and 1010 ° C for rolling. The invention can slow down the temperature drop rate of the workpiece and obtain more operable time, which is beneficial to keep the deformation of the upper and lower end surfaces of the blank consistent with the deformation of the middle section of the blank to ensure the uniformity of the structure of each part of the workpiece and avoid the critical deformation. Coarse grains are formed, so that the final grain size is better than grade 8, which ensures the fine grain structure, realizes the fine grain of the GH4169 alloy plate, and greatly improves the fatigue resistance of the GH4169 alloy.

The invention discloses a processing method for intermediate frequency heating cold-bending pipes. Firstly, intermediate frequency heating is used to heat the parts of the pipes to be bent to a certain temperature, and then the pipes are bent. The invention has the advantages of reasonable design, good heating effect, high work efficiency and good pipe bending quality, which reduces the labor intensity of workers and can create good production benefits for enterprises.

The invention relates to a novel direct continuous casting slag washing mixed material and a preparation process thereof, and belongs to the field of special-performance alloy and powder metallurgy novel material in metal materials of the novel materials. The novel heating slag washing mixed material comprises the following components in parts by weight: 30-65 parts of aluminum oxide powder, 30-50 parts of quick lime, 1-6 parts of magnesium oxide powder, 0-6 parts of fluorite and 5-6 parts of silicon dioxide powder. The preparation process of the novel heating slag washing mixed material comprises the following steps of: ball-milling the materials in a ball mill to obtain particle powder; press-moulding the ball-milled particle powder by a ball press, smelting in an electric-arc furnace; and adding 5-40 parts of aluminum powder to the molten liquid during a turning down process, and crushing the cooled material into particles. The novel direct continuous casting slag washing mixed material disclosed by the invention can be used for filtering deoxidized desulfurized molten steel very well, so that produced deoxidation products can be caught effectively and modification of impurities in the steel is promoted, so that the purpose of evolving the molten steel is reached.

The invention relates to a thin gauge pipeline steel rolling method. In the steel, the content of C is within 0.05 percent; the content of Ni is 0.05 to 0.06 percent; the content of Ti is 0.01 to 0.02 percent; the content of B is 0.015 to 0.002 percent; the soaking temperature during rolling is 1,180 to 1,220 DEG C; the soaking time is 45 to 100 minutes; the torque of a roughing mill is 3,500 to 3,600 kN.m; the compression ratio is controlled to be 5 to 20; the width spread ratio is controlled to be 1.25 to 2.0; rough rolling is performed within 50 seconds after steel is discharged from a furnace; in rough rolling, the pressing down ratio of at least one pass is ensured not to be less than 21 percent when transverse rolling is performed, and the single pass pressing down ratio of at least two passes is ensured not to be less than 25 percent when longitudinal rolling is performed; and the temperature reducing speed is within 60 DEG C. According to the method, a controlled cooling link after the steel is rolled is cancelled by regulating chemical components of pipeline steel and heating; the type of a steel plate is improved; the production efficiency is greatly improved; and the production cost is reduced.

The invention discloses an anti-carbon fuel injection device, which comprises: a fuel injection mechanism and an oxidant injection mechanism; the fuel injection mechanism includes a fuel pipe and a fuel nozzle assembly; The injection section installed on the side; the fuel injection nozzle assembly is installed at the end of the injection section away from the fuel inlet section; the fuel that flows through the oil inlet section and the high temperature end in turn and is injected by the fuel injection nozzle assembly is injected by the oxidizer injection mechanism The oxidant and high-temperature flue gas are mixed in the mixing channel of the mixing tube and then flow to the combustion chamber; the injection section extends into the mixing channel; the side wall of the injection section is provided with a channel for circulating cooling fluid. The present invention performs heat exchange between the cooling fluid and the oil pipe, and further realizes the cooling of the fuel oil in the fuel passage of the oil pipe to reduce the generation of carbon deposits, thereby reducing the carbon deposits in the fuel passages, improving the quality of fuel injection, and preventing the fuel nozzle assembly from being deposited by carbon The blockage will affect the working performance of the engine.

The invention relates to an automobile heating system. The automobile heating system comprises a heat exchange tube used for transferring heat by utilizing change of three states of matter as well as a heat exchange chamber and a three-way pipe, wherein the heat exchange tube is arranged in the heat exchanger chamber, the heat exchange chamber is provided with a blast blower, an air inlet and an air outlet, the three-way pipe comprises an air inlet pipe, a first air outlet pipe and a second air outlet pipe, the air inlet pipe is connected with an automobile exhaust pipe, the second air outletpipe is provided with a second valve, the air inlet end of the first air outlet pipe is provided with a first valve, the air outlet end of the first air outlet pipe is provided with a suction blower,the evaporation end of the heat exchange tube penetrates the heat exchange chamber and then is connected with the first air outlet pipe, the evaporation end of the heat exchange tube is arranged between the suction blower and the first valve. The invention provides the automobile heating system with good heating effect and protective action to an engine and solves the problems that the traditional automobile heating system has poor heating effect and large volume and is inconvenient to mount.

The invention provides a low-temperature sample holder, which is located in a vacuum chamber and at least includes: an electric movement mechanism, a refrigeration device and a three-dimensional movement device; wherein, the electric movement mechanism is used to drive the sample relative to the The refrigeration device moves, the refrigeration device is used to realize the cryogenic temperature of the sample, and the three-dimensional moving device is used to realize the three-dimensional movement of the refrigeration device and the electric moving mechanism relative to the vacuum chamber. The low-temperature sample holder of the present invention moves the sample relative to the vacuum chamber through electric drive, and realizes the low-temperature temperature of the sample, and the heat conduction between the electric movement mechanism and the external room temperature environment only includes the heat conduction channel composed of alloy wires, which effectively reduces the The thermal conductivity of the heat transfer channel between the cryogenic part and the ambient room temperature environment, thus enabling lower sample temperatures, lower risk of vacuum leaks and more compact and smaller structures.

The invention discloses an ultrahigh-strength corrosion-resistant rebar and a producing method thereof. The ultrahigh-strength corrosion-resistant rebar is prepared from, by mass percent, 0.21% to 0.27% of C, 0.50% to 0.80% of Si, 1.10% to 1.30% of Mn, 0.06% to 0.20% of V, 0.01% to 0.02% of Nb, 0.010% to 0.017% of N, 0.02% to 0.10% of Als, 0.01% to 0.07% of Ce, 0.20% to 0.43% of Cr, 0.20% to 0.45%of Cu, and / or 0.10% to 0.70% of Mo and the balance Fe and inevitable impurities. The producing method comprises the procedures of casting blank heating, casting blank rolling and after-rolling heat preservation. According to the ingredient design of the ultrahigh-strength corrosion-resistant rebar, low-content valuable alloy elements are adopted, the rolled rebar is covered with a heat preservation cover during cooling, and the obtained product has the beneficial effects of being good in mechanical property and corrosion resisting property and low in valuable alloy element content.

The invention discloses an ultrahigh-strength reinforcing bar and a production method thereof. The ultrahigh-strength reinforcing bar is prepared from the chemical compositions in percentage content by mass: 0.21-0.31% of C, 0.50-0.80% of Si, 1.40-1.60% of Mn, 0.06-0.27% of V, 0.01-0.20% of Nb, 0.010-0.017% of N, 0.02-0.10% of Als and the balance of Fe and unavoidable impurities. The production method comprises the procedures of steel slab heating, steel slab rolling and heat preservation after rolling. According to the ultrahigh-strength reinforcing bar and the production method thereof, thecomponent design of the ultrahigh-strength reinforcing bar adopts low content of precious alloy elements, the reinforcing bar after rolling is additionally covered with a heat preservation cover during cooling, the temperature dropping speed is decelerated, sufficient precipitation of V(C / N) is facilitated, and the obtained ultrahigh-strength reinforcing bar has the advantages that the mechanicalproperties are good, the content of the precious alloy elements is low.

The invention relates to a ferrous metal liquid die forging mould and a manufacturing method of the metal liquid die forging mould. A zirconium oxide or aluminum oxide coating is arranged on the inner surface of a mould cavity, diatomite thermal insulation coatings are arranged on the surface of the coating, the mould is sleeved with a copper sleeve, the copper sleeve is provided with a spiral cooling water channel which is arranged on the two sides and the bottom of the mould, and the copper sleeve is further sleeved with a supporting sleeve. The method comprises the following steps that (1), the mould is designed and manufactured according to a liquid die forge piece to be formed; (2), the zirconium oxide or aluminum oxide coating is sprayed on the inner surface of the mould cavity; (3), the mould is sleeved with the copper sleeve, the spiral cooling water channel is arranged on the copper sleeve, and the spiral cooling water channel is arranged on the two sides and the bottom of the mould; (4), the copper sleeve is sleeved with the supporting sleeve; (5), before each liquid die forge piece is forged, the diatomite thermal insulation coatings need to be sprayed on the surface of the coating of the mould. According to the ferrous metal liquid die forging mould and the manufacturing method of the metal liquid die forging mould, the temperature of the mould is decreased, and the service life of the ferrous metal liquid die forging mould is prolonged.