143results about How to "Avoid phase change" patented technology

The invention provides tensile strength more than or equal to 780MPa grade hot-rolled dual phase steel. The dual-phase steel comprises the following components in percentage by weight: 0.05-0.08 percent of C, not more than 0.5 percent of S, 0.6-1.2 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, less than or equal to 0.006 percent of N, 0.01-0.1 percent of Als, 0.05-0.25 percent of Ti, less than or equal to 0.6 percent of Cr or less than or equal to 0.003 percent of B or mixture of Cr and B. The production method by using CSP comprises the following steps: melting and continuously casting to form a slab; heating the continuous cast slab; rolling; carrying out laminar cooling; reeling; and naturally cooling to room temperature. The hot-rolled dual phase steel has the tensile strength of more than or equal to 780MPa, elongation of more than or equal to 15 percent and yield ratio of less than or equal to 0.70. An insulation cover additionally covers the intermediate insulation section, and the band steel cooling speed is reduced, so that generation of pearlite phase change can be effectively prevented. Production of hot-rolled dual phase steel with thickness of 1.2-4.0mm can be realized, the product has the advantages of uniform structure, small molding resilience and no cracking, existing equipment is utilized without adopting ultra fast cooling and other equipment, the production efficiency is high, and the investment is small.

An apparatus for concentrating solutions in a vaporising receptacle (1) is provided wherein the receptacle (1) has a mouth (3), and the axis of the receptacle is perpendicular to the mouth. The apparatus comprises: support means (7) for supporting the vaporising receptacle with the mouth of the receptacle uppermost and the axis substantially vertical; rotation means (89) being operable to rotate the vaporising receptacle at high speed substantially about the axis; means (13) for sealing the vaporising receptacle to the apparatus; a vacuum pump (46) to reduce the pressure within the vaporising receptacle; means (22) for dispensing into the vaporising receptacle a solution to be concentrated; sensing means (21) to measure the temperature of the solution within the vaporising receptacle; heating means (19, 99) to apply heat to the solution within the vaporising receptacle; a control and regulating unit (75) for controlling or regulating at least one of said rotation means, said vacuum pump, said dispensing means, said sensing means and said heating means. The invention allows low pressure evaporation in regularly sized and shaped receptacles without bumping, and is also easy to use. A corresponding method is provided.

A coated active biologic piezoelectric layer on Ti substrate is prepared from fluorohydroxy apatite (FHA) and barium titanate (BT) through cleaning the surface of Ti substrate, microarc oxidizing to form a porous oxide film layer, and electrophoretic deposition to form a FHABT layer on the surface of Ti substrate. Its advantages are easy control to content of F, high implantation stability, binding power to interface, biocompatibility and bioactivity, and high effect to promote generation of biologic bone and taking part energy conversion in human body.

The present invention relates to bioactive coating on the surface of titanium or titanium alloy and its preparation process. The process includes the following steps: the first anode oxidation, alkali treatment and heat treatment of titanium or titanium alloy to form surface gradient coating in the thickness of 3 micron and comprising one inner thin and compact titania film and one outer porous titania film; introducing Ca element by means of the electrolyte solution into the coating to raise the biocompatibility; boiling in NaOH solution for 1-5 hr to form thin surface sodium titanate and calcium titanate layer; and final depositing a bone-like hydroxyapatite layer. The present invention raises the bioactivity of titanium or titanium alloy surface, and has high binding force of hydroxyapatite layer and high cell adhering capacity.

An improved method of controlled energy delivery utilizing solid, liquid, and gaseous carbon dioxide (CO₂) into a water well and the surrounding aquifer to remove deposited material which may cause loss of capacity in wells and a variety of water quality problems. After proper study and evaluation of problems associated with a well to be treated, adequate injection of the required amount of CO₂ and energy is achieved by real-time monitoring during the injection and manipulating the phase changes in the CO₂ that take place in the well and the aquifer.

The invention relates to a preparation method of an SiC/C-AlPO4-mullite antioxidation coating for a C/C composite material, which comprises the following steps: mixing silicon powder and graphite powder to obtain powder A; mixing Al2O3 powder, WO3 powder and B2O3 powder to obtain powder B; mixing the powder A and the powder B to obtain embedded powder C; putting a sample in a graphite crucible, adding the embedded powder C, putting the graphite crucible in a vertical vacuum furnace, heating to react while introducing argon as a protective atmosphere, cooling to room temperature, and cleaning with anhydrous alcohol in ultrasonic waves to obtain a silicon carbide transition layer for the C/C composite material; adding the C-AlPO4 and the mullite powder into methanol, adding iodine to obtain a suspension, and putting the suspension in a hydrothermal kettle, wherein the cathode adopts the C/C composite material with the silicon carbide transition layer; and sealing the hydrothermal kettle, putting the hydrothermal kettle in an ultrasonic-microwave generator, depositing, taking out the sample, and drying to obtain the SiC/C-AlPO4-mullite antioxidation coating for the C/C composite material. The composite coating can protect the C/C composite material at 1500 DEG C in static air for 322 hours, and the oxidative weight loss is less than 2%.

The invention relates to a phase locked loop or “PLL” (12) and a method of operating a PLL (12), wherein a controllable oscillator (DCO) generates an output signal (CKout) and it is possible to switch between a first clock (CKin1 or CKin2) and a second clock (CKin2 or CKin1) for use as a PLL (12) input clock. In accordance with the invention, for the clock (CKin1 or CKin2) currently being used to generate the output signal (CKout) a phase difference is determined between this clock and a preset phase-shifted version (CK<1:8>) of the output signal (CKout) and is used to control the oscillator (DCO), whereas for the clock (CKin2 or CKin1) not currently being used to generate the output signal (CKout), the phase shift is adjusted. In this way, a phase difference between several clocks (CKin1, CKin2, CKin3) used as the input clock is effectively adjusted or else compensated before the switchover, so that any unwanted phase change in the PLL output signal resulting from the switchover can be avoided with a high degree of accuracy and hitless switching achieved.

A method for sealing aluminum alloy anodic oxide film pores through using a silica sol comprises the following steps: properly pre-treating aluminum or an aluminum alloy, and carrying out anodic oxidation treatment through a routine technology; and treating the aluminum or the aluminum alloy subjected to the anodic oxidation treatment through electrophoresis under different process conditions, carrying out electrophoretic deposition, drying, and sintering to seal the aluminum and aluminum alloy anodic oxide film pores and simultaneously generate a silicon oxide ceramic coating. The method using the electrophoretic deposition provided in the invention has the advantages of simple process, easy enforcement, and no need of high condition requirements, and the prepared ceramic coating has the advantages of compactness, good performances, and component uniformity. The method can be used for sealing the aluminum or aluminum alloy anodic oxide film pores, and the electrophoretic silica sol method applied to the anodic oxide film pores has the characteristics of cleanness, no pollution, and easy industrialization realization.

The invention discloses a data center liquid cooling system and relates to the technical field of data center heat dissipation devices. The system comprises a box body, a server, a cold plate, a cooling device, a liquid storage tank and a refrigerant pump. The box body is filled with a single-phase refrigerant, the server is immersed in the single-phase refrigerant, the server is connected to thebox body, the cold plate is arranged in the box body and is connected to the box body, and the cold plate is sequentially connected to the cooling device, the liquid storage tank and the refrigerant pump to form a circulation loop. The invention realizes the combination of indirect contact liquid cooling, single-phase direct immersion liquid cooling and natural cooling, so that the single-phase refrigerant does not need to be circulated under the driving of a pump but is circulated by the change of temperature and density, although the refrigerant is circulated under the driving of the refrigerant pump, the refrigerant has a smaller viscosity than that of the single-phase refrigerant and is easy to flow, the loss of the refrigerant pump is not increased, so the pump loss caused by the single-phase refrigerant is reduced, the PUE of a data center is lowered, and the greenness of the data center is improved.

A method which adopts direct hot feeding and hot charging technique for manufacturing alloy plastic mold steel belongs to the technical field of medium steel plate. The technique comprises the steps of furnace revolving, LF desulfurizing, RH vacuum degassing, continuous casting, cutting, hot feeing, hot charging and heating. The continuous casting sheet billet with thickness of 200-380mm is hot fed and hot charged into a heating furnace after wire cutting without slowly cooling or annealing. The superheat degree of continuous casing pouring is controlled to 10-30 DEG C. The pulling rate is matched with superheat degree and is controlled to 0.7-1.0m/min. The plate bank is directly fed to a heating furnace through the hot feeding roller conveyor after linear fixed-length cutting. The plate blank can be executed with the hot charging technique after linear fixed-length cutting if surface checking or other production organization problem occurs. The plate blank is hotly charged into the heating furnace at a temperature which is larger than or equal to 550 DEG C after checking out of production line. When the plate blank is charged into the heating furnace, the temperature of heating furnace is between 500 and 700 DEG C, and the temperature of preheating section is between 450 and 600 DEG C. The method of the invention has the advantages of excellent heating quality of plate blank according to the technique, shorted production period, and reduced energy consumption of heating furnace.

An underlying insulting film of silicon oxide, a gate insulating film of hafnium oxide, a gate electrode of polysilicon, and side walls of silicon oxide are formed above an element formation region of a semiconductor substrate. In the upper portion of the element formation region of the semiconductor substrate, source and drain areas and extension areas are formed by implantations of respective types. Thereafter, the scan speed of the semiconductor substrate and the pulse interval and the peak power of laser beam are adjusted to irradiate only the vicinity of the surface of the semiconductor substrate with laser beam for 0.1 second so that the vicinity of the surface of the semiconductor substrate has a temperature of 1150 to 1250° C. Thus, heat treatments for the gate insulating film and the source and drain areas are performed.

An average bidirectional flow tube, including a body having two side plates and upper and lower plates, a partition plate installed to be perpendicular to the side plates of the body so that front and rear ends of the tube are separated from each other, and two pairs of pressure impulse lines installed at front and rear positions of the partition plate. The upper and lower plates of the body each have a curvature to be in contact with an inner surface of a pipe in which the average bidirectional flow tube is installed, and each of the pressure impulse lines is installed to communicate with an interior of the pipe. Although a two-phase flow occurs in the pipe or the flow of the fluid flowing in the pipe is changed, an average flow rate of a fluid can be measured. Particularly, it is easy to measure an average flow rate of the fluid when the fluid flows at a low speed. Further, even when sudden pressure reduction occurs in the pipe, an additional cooling device is not required. When a two-phase flow occurs in the pipe, the fluid suffers a phase change due to the sudden pressure reduction of the pipe, or a stratified flow occurs due to the two-phase flow in a horizontal pipe, it is unnecessary to displace the average bidirectional flow tube.

The invention discloses a stroke processing method of an ultrathin cylinder stainless steel tube film for a printer and a duplicator, comprising the following steps of: a. preparing a mould with continuous multistage stroke processing; b. primarily stretching a plate to prepare a cylinder with marginal ridge; c. coating lubricating agents on the inner wall and the outer wall of the cylinder, mounting the cylinder on a punching head of the mould, driving the punching head to press into the mould once, simultaneously cooling the punching head and heating a punching die of each stage through stroke processing; and d. drawing out the punching head for demoulding, cutting off two ends of a pipe fitting subjected to the differential temperature stroke processing and reserving the pipe body at the middle to obtain the required ultrathin cylinder stainless steel tube film. With the technical scheme, by cooling the punching head, heating the punching die of each stage through stroke processing and carrying out multistage stroke processing by one-time differential temperature, the invention avoids the martensite phase transformation and improves the plasticity of stainless steel materials. In addition, by using the process method, the production can be finished by only three working procedures of primary stretching, annealing and multistage stroke processing and re-stretching, so that the production efficiency is improved.

The invention relates to a preparation method of a C-AlPO4-mullite/glass layer gradient composite antioxidation coating, which comprises the following steps: mixing SiO2, B2O3, Al2O3 and MgO to obtain powder A; calcining the powder A, and grinding to obtain glass powder B; adding the mullite powder and the C-AlPO4 powder into isopropanol to obtain a suspension C; adding a simple substance iodine into the suspension C to obtain a solution D; pouring the solution D into a device which uses a graphite electrode as the anode and a conductive base as the cathode, clamping a C/C composite material sample with an SiC internal coating onto the cathode in the device, and carrying out electrophoretic arc discharge deposition to obtain a sample E; adding the glass powder B into ethanol to obtain a slurry, repeatedly brushing the slurry on the surface of the sample E, and drying to obtain a sample F; and putting the sample F in a crucible, putting the crucible in a vertical vacuum furnace, heating to react while introducing argon as a protective atmosphere, and opening the furnace and the crucible to obtain the C-AlPO4-mullite/glass layer gradient composite antioxidation coating. The composite coating prepared by the method provided by the invention can protect a C/C composite material at 1500 DEG C in static air for 700 hours, and the oxidative weight loss is less than 0.8%.

The invention discloses an ethylene supply device and a flow measuring method thereof. An ethylene gas cylinder is connected with a piston cylinder through a pipeline, the piston cylinder is connected with a test model through a pipeline, a compensation gas source is connected with the piston cylinder through a pipeline, wherein the ethylene gas cylinder is used for filling an ethylene gas into the piston cylinder, and connected to the test model through the pipeline; the compensation gas source is used for compensating compensation gas with stable pressure into the piston cylinder, wherein the compensation gas pushes a piston with stable pressure, so that the piston extrudes the ethylene gas with stable pressure to realize stable and quick supply of the ethylene. Meanwhile, the ethylene supply device precisely controls pressure of the ethylene gas which enters the piston cylinder through a solenoid valve, so that the working pressure is lower than a liquidation pressure point at a local temperature all the time, an ethylene phase change problem in a working process is avoided, the mass of the ethylene gas fed into a fuel cylinder is obtained by measuring the pressure and the volume of the ethylene gas in the piston cylinder, and the flow of the ethylene is accurately calculated and obtained by measuring ethylene outflow time.

The invention belongs to the technical field of crop anti-freezing, and discloses an anti-freezing agent for crops.The anti-freezing agent is prepared from, by mass, 15-20 parts of polyethylene glycol, 10-15 parts of N,O-carboxymethyl chitosan, 1-2 parts of soybean hydrolyzed amino acid, 1-3 parts of calcium lactate, 1-3 parts of monopotassium phosphate, 0.01-0.03 part of 6-benzylamino adenine, 0.2-0.4 part of brassin, 0.02-0.04 part of diethyl aminoethyl hexanoate, 0.01-0.03 part of abscisic acid and 1000 parts of distilled water.The anti-freezing agent is good in anti-freezing effect and cannot cause excessive growth of plants.