28results about How to "Organizational stability" patented technology

The utility model provides a two-way chain type cooling bed. The cooling bed comprises a plurality of forward chains and a plurality of reverse chains, the running direction of the forward chains is the same as the advancing direction of the steel, and the running direction of the reverse chains is opposite to the advancing direction of the steel; a forward chain motor, wherein all the forward chains are connected with the forward chain motor; a reverse chain motor, wherein all the reverse chains are connected with the reverse chain motor; the steel splitting disc is positioned at an inlet of the cooling bed; the fans are arranged on the two sides of the cooling bed correspondingly. According to the cooling bed, steel is cooled on the cooling bed in a temperature monitoring control cooling mode, the overall-length temperature difference deviation of the steel is small, overall-length uniform cooling of the steel is achieved, material performance fluctuation is small, the structure is stable, and meanwhile the performance requirements for strength and toughness are met; and the cooling uniformity of the two ends of the steel is adjusted in real time through the temperature, and the structure uniformity and performance stability of the cooled steel are ensured.

This invention provides a fermented milk with stable quality, a method for manufacturing the same, and a dephosphorylated milk. One fermented milk contains more than 0.8 g / 100 g of dephosphorylated casein.

The invention discloses a zinc impregnation agent, a zinc impregnation method of an electric power connection fitting and an anti-corrosion electric power connection fitting. A steel fitting is austenitized and then cooled; the surface of the cooled steel fitting is pretreated; and the pretreated steel fitting and a zinc impregnation agent are added into a closed impregnation tank, heat preservation is conducted at the set temperature, and then staged cooling is conducted. The zinc impregnation agent is prepared from the following components in percentage by mass: 54.0 percent to 57.0 percent of zinc powder, 20.0 percent to 23.0 percent of SiO2 powder, 3.0 percent to 3.5 percent of CeO2 powder, 5.0 percent to 6.0 percent of aluminum powder, 2.5 percent to 3.0 percent of nickel powder, 2.5 percent to 3.0 percent of chromium powder, 3.0 percent to 3.5 percent of magnesium powder, 2.5 percent to 2.8 percent of NH4Cl powder and 2.5 percent to 3.0 percent of B4C powder. The thickness of a zinc impregnation layer is larger than 160 m, and the hardness of the zinc impregnation layer is larger than 480 HV; and the sherardizing layer is compact in structure, and the sherardizing layer is well combined with the surface of the 35CrMo steel fitting.

The invention provides a sulfur-resistant corrosion-resistant low-carbon alloy coiled tubing and a preparation method thereof, and relates to the technical field of coiled tubing. By means of the plasma welding mode, steel strip weld joint grains are refined, the structure is uniform, the strength is stable, and the strength and corrosion resistance of a plate connector are prevented from being reduced. According to the heat treatment process, weld grains are refined, the structure is more uniform, stress is removed, the strength of the whole pipe is stable, the structure is uniform, and the final purposes of high strength and high corrosion resistance are achieved. The metallographic structure of the sulfur-resistant and corrosion-resistant low-carbon alloy coiled tubing is ferrite and pearlite, the average grain size of metal in a weld joint, a heat affected zone and a base material reaches 10.0 grade or above, and the comprehensive performance can reach 90 steel grade.

The invention discloses a hot-embedded tooth-fixing drill bit body and a heat treatment method thereof, and belongs to the technical field of heat treatment of rock drilling tools. Comprising the following steps that a bar is sawed into a blank with the required length according to needs, and annealing is conducted at the temperature of 750-770 DEG C; the drill bit body subjected to finish machining is placed in a molten salt bath furnace in a suspended mode, the temperature is increased to 890-910 DEG C, and constant-temperature heat preservation is conducted for 15-35 min; the drill bit body is put into a constant-temperature quenching device with the oil temperature ranging from 40 DEG C to 60 DEG C to be subjected to oil quenching, the drill bit body shakes back and forth in oil for 110 s to 130 s, too high oil temperature and non-uniform oil temperature are avoided, then the drill bit body stands for 290 s to 310 s, and the drill bit body is taken out and suspended for air cooling; the drill bit body is put into a box-type furnace to be heated to 850-870 DEG C, and the drill bit body is discharged out of the furnace to be air-cooled; and the drill bit body treated in the third step is quenched and tempered. According to the method, the heat treatment hardness is uniform, the treated drill bit body is good in abrasion resistance and high in tooth fixing strength, the fixed teeth are not prone to cracking or falling, the effect that all indexes of the drill bit body reach the drill bit body hardness and the stable structure is achieved, the actual problem is solved, and the product quality is greatly improved.

The invention belongs to the technical field of medium-entropy alloys, and particularly relates to a medium-entropy copper alloy and a preparation method and application thereof. The medium-entropy copper alloy provided by the invention comprises the following element components in atomic percent: 43%-47% of Cu, 7%-9% of Mn, 6%-8% of Sn, 30%-40% of Ni and 0.1%-10% of Co. According to the medium-entropy copper alloy, an alloy cast ingot is prepared through a smelting technology, and then a finished product is obtained after solid solution and aging. The Co element is introduced into the medium-entropy copper alloy and can inhibit formation and growth of discontinuous precipitated phases in the alloy, so that precipitation of the discontinuous precipitated phases is reduced, an H-L12 phase is uniformly and continuously distributed in an alloy matrix, and the mechanical property of the medium-entropy copper alloy is improved. The medium-entropy copper alloy provided by the invention has extremely high mechanical strength, fracture toughness and wear resistance.

This invention discloses a composite deformation heat treatment process for improving the strength and corrosion resistance of aluminum-lithium alloys, belonging to the field of aluminum-lithium alloy preparation technology. The composite deformation heat treatment process for improving the strength and corrosion resistance of aluminum-lithium alloys of this invention includes the following steps: (1) performing solution treatment, water quenching, and natural aging treatment on the aluminum-lithium alloy in sequence; (2) performing pre-deformation treatment on the aluminum-lithium alloy treated in step (1); (3) performing non-isothermal aging treatment on the aluminum-lithium alloy treated in step (3); wherein, the pre-deformation amount of the pre-deformation treatment is 4~10%; the non-isothermal aging treatment is to first raise the temperature from 40℃ to 140~200℃ and then lower the temperature to 100~160℃; the aluminum-lithium alloy treated by the composite deformation heat treatment process of this invention has both good mechanical properties and corrosion resistance.

The invention relates to the technical field of fasteners, and provides a high-strength bolt and a production process thereof.The production process of the high-strength bolt comprises the following steps that after a bolt blank is subjected to cold heading, thread machining, acid pickling and phosphating treatment, the high-strength bolt is obtained; the bolt blank body is composed of the following components in percentage by weight: 0.10% to 0.18% of C, 0.22% to 0.32% of Si, 0.65% to 0.85% of Mn, 0.50% to 0.65% of Cr, 0.012% to 0.03% of Ti, 0.010% to 0.025% of N, 0.01% to 0.015% of Al, 0.008% to 0.012% of Ce, 0.0015% to 0.0030% of B, and Slt; 0.015%, Plt; 0.020%, and the balance being Fe and inevitable impurities. Through the technical scheme, the problem of low bolt strength in related technologies is solved.

The invention discloses a casting preparation method for a new energy automobile battery shell aluminum alloy, and relates to the technical field of battery shell aluminum alloys. The casting preparation method comprises the following steps that S1, after 3003 aluminum alloy is cast, yttrium tetraboride is added, and liquid metal is obtained after heating; s2, after aluminum-titanium-boron seed crystal alloy is added into the liquid metal, heat preservation and slagging-off are conducted, and aluminum alloy liquid is obtained; and S3, the molten aluminum alloy is subjected to die casting, annealing, surface treatment and subzero treatment. The aluminum alloy obtained through the method is excellent in mechanical performance and welding performance.

The application discloses a power distribution box electricity monitoring method based on big data analysis and relates to the technical field of big data analysis, which comprises the following steps: collecting loop-level electricity and operation data, and obtaining time series data sets through preprocessing; calculating an incremental energy density curve and a distribution entropy curve, and generating a joint sequence sample set; constructing an improved DLinear model to obtain a prediction sequence; performing singular spectrum decomposition and phase space re-embedding to form an abnormal recognition feature vector set; obtaining clustering attribution information based on a mean shift clustering algorithm; performing target risk integration to output a graded alarm result; and generating loop-level electricity monitoring to form an electricity monitoring result. The application realizes reliable electricity trend prediction and abnormal grading positioning monitoring of the power distribution box by combining the improved DLinear model prediction and the risk grading alarm of the mean shift clustering algorithm.

The application relates to the technical field of air conditioner cabinet control, and discloses an air conditioner cabinet control method, which comprises the following steps: acquiring state parameters of an air conditioner cabinet in real time, wherein the state parameters comprise operation parameters of multiple components of the air conditioner cabinet; performing environment prediction based on the state parameters, and determining an operation mode of the air conditioner cabinet based on the result of the environment prediction; determining fan basic parameters corresponding to the operation mode; performing linkage control on the operation parameters of the multiple components of the air conditioner cabinet based on the result of the environment prediction, the fan basic parameters and the state parameters; and continuously monitoring the state parameters acquired in real time, and taking corresponding processing measures when an abnormality is monitored. The application realizes the whole-process closed loop from prediction to decision-making, from linkage control to abnormality protection, effectively improves the comfort, reduces the energy consumption and enhances the operation safety.

The present application relates to the field of complex alloy materials, and discloses a corrosion-resistant complex alloy material with stable high-temperature structure and a preparation method thereof. The preparation method comprises: using pure nickel solder to perform surfacing on the surface of Inconel 617 alloy parent material, and during the surfacing, controlling the welding heat input to be 1440-1920 J / mm, the number of surfacing layers ≥ 3 layers, and the total surfacing layer thickness ≥ 3 mm. The implementation method of the present application can significantly improve the molten salt corrosion resistance of the alloy itself while maintaining good high-temperature structure stability.

The invention discloses a material for a high-performance injection mold and a preparation method of the material. The material comprises the following components in percentage by mass: 0.30-0.40% of C; 0.20% to 0.40% of Si; mn: 1.2 to 1.5%; 1.5 to 2.0 percent of Cr; 1.5 to 2.0 percent of Mo; 0.8% to 1.2% of Ni; 0.2 to 0.4 percent of V and the balance of Fe. According to the material for the injection mold, alloy elements such as Ni, Mo and V are added on the basis of medium carbon steel during burdening, crystal grains are refined, the hardenability is improved, and meanwhile the strength, wear resistance and plasticity and toughness of the material are improved. Ni and Cr alloy elements are also beneficial to improving the corrosion resistance of the injection mold.

The invention relates to a method for reducing the occurrence frequency of abnormal breakage of a ball head during a tensile test of an insulator steel foot in the technical field of steel smelting rolling and forging processing, and aims to solve the problem of high abnormal breakage frequency caused by insufficient whole-process organization genetic control in the prior art. According to the technical scheme, the method is characterized in that 45Mn2 steel with specific components is adopted, and the streamline and the structure of a high-stress area of the ball head are stabilized through cooperative control of key processes such as large-section blank casting and electromagnetic stirring of a continuous casting procedure, cold charging and high-temperature heating, initial forging temperature control, two-time forming forging of the ball head and dispersed cooling after forging. The method is mainly used for manufacturing insulator steel pins for high-voltage and ultra-high-voltage transmission lines, and the abnormal fracture frequency of the ball head is reduced to be smaller than or equal to 2 times per million pieces.

The present application relates to a kind of 90ksi grade duplex stainless steel and its preparation method, belong to metal material processing and toughening technical field, solve the technical problems that the existing 25Cr type duplex stainless steel solid solution state strength is insufficient, cold deformation can promote intensity but lead to plasticity and toughness significantly drop and large cross-section component forming difficulty.The 90ksi grade duplex stainless steel, chemical composition includes by mass percent:Cr 24%-26%, Ni 6.0%-7.5%, Mo 2.5%-3.0%, N≤0.32%, C≤0.03%, Si≤1.0%, Mn≤2.0%, the balance is Fe and impurities.The duplex stainless steel prepared by the present application, yield strength is not less than 621MPa, while elongation after break is not less than 17%, reduction of area is not less than 60%, realizes the matching of high strength and good plasticity, is suitable for the forming manufacturing of large cross-section complex shape component.

The invention discloses a directionally solidified Fe-B-Si alloy surface protective film and a preparation method thereof. The Fe-B-Si alloy prepared by a directional solidification process is placed in liquid zinc for interfacial reaction. After the reaction is completed, the Fe-B-Si alloy is cooled to obtain a three-layer mortise and tenon structure protective film. The formed surface film and a metal substrate form a mutually interlocking mortise and tenon structure, which is firm and has high stability and density, and can effectively prevent surface peeling caused by zinc liquid cavitation.

A high-toughness magnesium alloy powder making device and a preparation method thereof, which relates to a powder making device and a preparation method thereof. The present invention is to solve the problems of easy plastic deformation, low powder yield and decreased hydrogen storage performance of magnesium alloy powder in the existing preparation of magnesium alloy powder. The present invention drives the gear set to rotate through a motor, driving the grinding disc and the driven gear to rotate coaxially, so as to achieve the effect of adjustable grinding disc speed during grinding. The grinding disc feed is controlled by a hydraulic lifting device, and the feed amount and feed speed are set according to the required amount of powder or the height of the sample exposed in the slot. The device sets the grinding disc to the lowest position and still reserves a safe distance from the slot. Put the magnesium alloy sample into the concave position of the base and determine the height of the sample exposed in the slot, evacuate; introduce protective gas; start the circulating water pump of the cooling system; adjust the grinding disc height to grind and collect the powder. The present invention is used for high-toughness magnesium alloy powder making.

The invention discloses a production method of a cold-rolled steel strip for a welding wire. The production method comprises the working procedures of converter smelting, continuous casting, hot rolling, cold rolling, continuous annealing and flattening. Refining treatment is not carried out; continuous annealing is adopted in the annealing process, and a heating device is arranged behind the rapid cooling section. According to the cold-rolled steel strip produced through the method, the yield strength Rp0.2 is smaller than or equal to 190 MPa, the tensile strength Rm is 280-350 MPa, the percentage elongation after fracture A80 mm is larger than or equal to 44%, the cold-rolled steel strip has good formability, welding performance and drawing machining performance, the surface quality is good after drawing, surface defects such as orange peel and wrinkling do not exist, and meanwhile the production cost is low.

This invention belongs to the field of metallic materials technology, specifically a single-phase TiZrMo spherical refractory high-entropy alloy powder and its preparation method. The refractory high-entropy alloy powder is composed of any two of Al, Cr, and Nb, and Ti, Zr, and Mo. The atomic radius difference of the refractory high-entropy alloy powder is ≤6.5%, the alloy entropy enthalpy ratio Ω is ≥1.4, and the mixing enthalpy ΔH is... mix The energy density is -20.27 to -3.27 kJ / mol, and the vacancy electron concentration (VEC) is <4.96. Furthermore, the preparation method of this invention has the advantages of simple steps, easy composition control, high production efficiency, and near-net-shape forming. The prepared spherical single-phase BCC refractory high-entropy alloy powder has a high sphericity, smooth surface, and low cost. The high-entropy alloy bulk prepared from this powder has stable microstructure and properties, and its density (2.70–10.22 g / cm³) can be adjusted within a wide range. 3 It possesses both good plasticity (compressive fracture strain ≥10.0%) and strength (compressive strength ≥965MPa), making it suitable for large-scale industrial applications.

The invention discloses a high-purity TA8 titanium ingot material prepared from TA9-1 and Gr.17 and a preparation method of the high-purity TA8 titanium ingot material, and belongs to the technical field of rare metal material processing. On the premise that palladium powder is not used, the proportioning ratio of TA9-1 to Gr.17 to titanium sponge to TiO2 is calculated through a TA8 target component, the titanium sponge and the TiO2 are evenly mixed and pressed into an electrode block, the electrode block is evenly distributed with TA9-1 and Gr.17 block materials, and smelting is conducted; by pressing the two low-oxygen titanium-palladium alloy block materials into electrodes, the O content in the two low-oxygen titanium-palladium alloy block materials can be effectively increased to 0.12-0.20 wt.% from 0.05 wt.%, the Pd content is diluted to 0.04-0.08 wt.%, and finally the large-specification TA8 ingot material which can be industrialized and is high in purity and stable in quality is prepared. Two low-oxygen titanium-palladium alloy blocky materials which are difficult to directly recycle are turned into wealth, the problem of oxygenation of the blocky materials is solved, full utilization of precious metal resources is achieved, materials and energy are saved, the production cost is reduced, and environmental pollution is reduced; eB smelting is utilized to remove high-density and low-density inclusions, and the TA8 titanium ingot material with stable quality and high purity is produced.

The invention belongs to the technical field of laminated composite materials, and particularly relates to a Ti3Al-TiAl laminated composite material and a preparation method and application thereof. According to the method, the forged Ti3Al alloy and the forged TiAl alloy serve as raw materials, the Ti3Al-TiAl laminated composite material is prepared through the vacuum hot pressing and sheath hot rolling method, the room-temperature ductility and toughness of the composite material are improved, the high high-temperature performance (yield strength and tensile strength) of the composite material is kept, the size of the obtained Ti3Al-TiAl laminated composite material is (200-1000) mm * (80-500) mm * (1-5) mm, the room-temperature tensile strength reaches 900-1100 MPa, and the tensile strength of the obtained Ti3Al-TiAl laminated composite material reaches 90-100 MPa. The room temperature plasticity is 3%-6%, the fracture toughness is 35 MPa.m < 1 / 2 >-50 MPa.m < 1 / 2 >, the tensile strength at 800 DEG C can reach 650-800 MPa, the yield strength at 800 DEG C can reach 600-700 MPa, and the plasticity at 800 DEG C is 20%-30%. And the large-size and large-batch production requirements are met, and good application prospects are achieved.

The invention discloses a heat treatment method for oil-liquid secondary quenching of a high-chromium grinding ball, which comprises the following steps: austenitizing a high-chromium grinding ball blank, carrying out primary oil quenching to cool the grinding ball to 100-140 DEG C, carrying out secondary quenching to cool the grinding ball to 0-40 DEG C, and tempering to obtain the high-chromium grinding ball. By selecting a proper heat treatment process and combining mutual cooperation of all elements, the martensite content and the contents of C and Cr in martensite can be increased, grains are refined, growth of eutectic carbides is inhibited, the eutectic carbides are uniformly distributed, and the grinding ball still keeps good toughness while having high wear resistance.

The invention belongs to the technical field of aluminum-based materials, and particularly relates to a high-strength and high-elongation 1100D aluminum foil and a preparation method thereof. Through composite addition of multiple elements such as RE and Zr and fine process control, the material strength is remarkably improved while good plasticity and machinability of the aluminum foil are guaranteed, the prepared aluminum foil overcomes the problem that the strength of a traditional 1100 series alloy is low or the ductility is sharply reduced after the strength is improved, and the comprehensive mechanical property of the aluminum foil is superior to that of a conventional product.

The invention relates to a low-energy-consumption treatment method for synchronously improving the obdurability of titanium alloy. The treatment method comprises the following steps: S1, blanking; s2, heating the material before forging; s3, forging is carried out; s4, upsetting and punching are carried out; s5, trestle chambering is conducted; step S6, ring rolling; and S7, annealing, heating the forge piece to 600-800 DEG C, preserving heat, and then cooling. The method has the advantages that deformation is performed firstly, then phase change is performed, a beta phase in the titanium alloy is subjected to martensite phase change through deformation, then annealing is performed, recovery and recrystallization are performed, a fine martensite phase is obtained, work hardening can be eliminated, the structure can be stabilized, and the strength and toughness of the titanium alloy can be greatly and synchronously improved; stress accumulated by previous deformation is eliminated through annealing, and the long-term stability and reliability of the material are improved.

The invention discloses a preparation method of a centrifugal composite roller with an ultra-thick working layer, which belongs to the technical field of roller preparation and comprises the following steps: step A, taking waste steel, ferronickel, ferrovanadium, ferrochromium, ferromolybdenum, ferrotungsten and electrode powder as raw materials, and smelting outer-layer molten iron and core molten iron by adopting a power frequency or intermediate frequency furnace; b, after the smelting components reach the standard, the outer-layer molten iron and the core molten iron are heated, discharged out of the furnace and poured, and step inoculation is adopted during outer-layer pouring; c, after pouring is completed, a box is opened in a cold mode, and rough machining is conducted after the box is opened in the cold Step D, performing heat treatment on the product after the rough machining is finished; and E, after heat treatment is finished, finish machining is conducted till a finished product is obtained. According to the method, the problem of difference of the structure consistency in the working layer is solved, the stable working layer structure is obtained on the basis of the super-thick working layer, the structure uniformity of the whole working layer is achieved, and the stability of the working layer is guaranteed.

This invention discloses a high-strength earthquake-resistant steel bar, relating to the field of building steel technology. It is composed of the following components by weight percentage: C: 0.16-0.19%, Si: 0.35-0.50%, Mn: 1.25-1.40%, V: 0.025-0.035%, N: 0.0060-0.0085%, Cu: 0.18-0.25%, Cr: 0.25-0.35%, Mo: 0.04-0.08%, composite rare earth: 0.010-0.018%, B: 0.0010-0.0020%, Ti: 0.008-0.015%, with the remainder being Fe. Impurity content is controlled as follows: P≤0.020%, S≤0.008%, O≤0.0020%. The sum of the weight percentages of all components is 100%. The steel bars prepared by this invention have good mechanical properties and corrosion resistance, and can meet the stringent seismic requirements of high-intensity earthquake zones.

This invention belongs to the field of metallic materials technology, specifically a TiZrMo-based refractory high-entropy alloy and its preparation method. The refractory high-entropy alloy is composed of any two of Al, Cr, and Nb, and Ti, Zr, and Mo. The atomic radius difference δ of the refractory high-entropy alloy is ≤6.6%, the alloy entropy enthalpy ratio Ω is ≥1.1, and the mixing enthalpy ΔH is... mix The energy density ranges from -18.0 to 4.0 kJ / mol, and the vacancy electron concentration (VEC) is <6.87. Furthermore, the preparation method of this invention has the advantages of simple steps, easily controllable composition, high production efficiency, and near-net-shape forming. The prepared refractory high-entropy alloy has a stable microstructure and a density of less than 7.00 g / cm³. 3 It has a Vickers hardness greater than 1400 HV, a room temperature compressive strength consistently above 980 MPa, an elongation at break greater than 10.8%, and an oxidation weight gain of less than 15.00 mg / cm³ at 800℃ for 12 hours. 2 It is low in cost and easy to apply on a large scale in industrial applications.