39results about How to "Reduce reheating" patented technology

The invention discloses hot forming steel produced through an ESP production line and having tensile strength larger than or equal to 1800 MPa. The steel comprises, by weight percent, 0.28 to 0.40% ofC, 0.15 to 0.40% of Si, 1.40 to 1.60% of Mn, not larger than 0.01% of P, not larger than 0.01% of S, 0.015 to 0.050% of Als, not larger than 0.80% of Cr, not larger than 0.005% of N, 0.002 to 0.005%of B, not larger than 0.50% of Mo, and 0.025 to 0.090% of Nb+Ti. The production method comprises the steps of smelting and continuous casting to form a plate blank; rough rolling; soaking; finish rolling after conventional high-pressure descaling; laminar cooling; heating; punching molding after acid pickling. Nb and Ti are added in a composite manner, elements of Cr, B, Mo and the like in the components are controlled, the ESP short-flow technology is adopted to produce hot stamping forming steel with the tensile strength being 1800 MPa, the mechanical property is ensured, the plate roll repeated heating, uncoiling and other procedures in the production process are reduced, cold rolling and annealing heat treatment procedures are omitted, and production cost is reduced.

The invention belongs to the technical field of industrial production waste gas recovery, and particularly relates to a recovery system for N-methyl pyrrolidone in lithium battery industrial waste gas treatment and a technology of the recovery system. The recovery system comprises a precooling and exchanging unit, a condensing unit, an adsorption and regeneration unit and an NMP waste liquor recovery tank which are sequentially connected, and the precooling and exchanging unit and the condensing unit are both connected with the NMP waste liquor recovery tank. Compared with the prior art, according to the NMP gas recovery system, equipment is simple, the technological process is short, no activated carbon adsorbent is used, eluting tower waste liquor is not generated, and the primary recovery rate of NMP can reach 99% or above; the production environment is effectively improved, personnel body health is prevented from being harmed, the cost of enterprise consumables is reduced, and the resource recovery utilization rate is increased.

The invention discloses austenitic valve steel and a process for producing the same. The austenitic steel comprises the following components in mass percentage: 0.57 to 0.65 percent of C, less than or equal to 0.25 percent of S, 9.50 to 11.50 percent of Mn, less than or equal to 1.50 percent of Ni, 20.00 to 22.00 percent of Cr, less than or equal to 0.050 percent of P, less than or equal to 0.030 percent of S, 0.40 to 0.60 percent of N, 1.00 to 1.20 percent of Nb, 0.75 to 1.00 percent of V, and the balance being iron and inevitable impurities. The production process is to take the component materials and adopt an electric furnace smelting method to perform quenching and tempering, gas refining and continuous casting and tandem rolling. The austenitic valve steel has the advantages of reasonable component design, good product comprehensive performance and low nickel content; besides, the production process substantially reduces the power consumption in production, and the production cost is low.

The invention belongs to the field of the manufacturing industry, and specifically discloses a casting-forging composite plastic forming process for a brake disc. The casting-forging composite plastic forming process comprises the following steps of metal smelting: component analyzing; casting; constant-temperature keeping; de-molding; clearing; blank forging; die-forging; de-molding; trimming; stack-cooling; surface treating; mechanical processing; thermal treatment; and finished product assembly. According to the casting-forging composite plastic forming process, internal defects, especially internal shrinkage cavity defects and shrinkage porosity defects, are extremely liable to integrate, and air holes inside a casting can be eliminated by utilizing a liquid curing and heat-release phenomenon, so that comprehensive mechanical property of a forged piece are improved.

The invention discloses a preparation method of a two-sheet aluminum alloy rim. The preparation method includes the steps: preparing materials: placing a 6061 aluminum bar into an electric heating furnace, insulating the aluminum bar for at least three hours at the temperature of 500-550 DEG C, and heating a ring grinding mould to reach the temperature of 200-300 DEG C and keeping the temperature; placing the heated aluminum bar on an air hammer for upsetting to form a coarse material, and punching a center hole in the center of the coarse material; transferring the coarse material with the center hole onto a ring rolling mill for rolling a ring to form a ring rolling blank; placing the ring rolling blank into a spinning mould for spinning to form a semi-finished product; performing heat treatment and machining for the formed semi-finished product to form a finished product. The diameter of the 6061 aluminum bar ranges from 180mm to 250mm, the height of the coarse material is 1/2-2/3 of that of a hub needing to be formed, the diameter of the center hole ranges from 100mm to 150mm, and the diameter of the ring rolling blank reaches that of the hub needing to be prepared. The preparation method has the advantages of simplicity, high material use ratio and low cost.

An electroslag casting technology for manufacturing the wheel axle of high-speed train includes using the water bottom tray of crystallizer as electrode, using the axle billet as consummable electrode, choosing slag system and filling ratio, and electroslag casting. Its advantages are high mechanical performance and long endurance life.

The invention provides a refined martensitic alloy for internal combustion engine valves and a production technology thereof. The alloy is characterized by comprising the following chemical components by weight percent: 0.80-0.90 of C; 1.20-1.43 of Mn; 0.029 of P; 0.83-0.93 of Si; 0.016-0.018 of S; 16.80-18.80 of Cr; 2.20-2.53 of Mo; 0.32-0.58 of V; 0.13-0.19 of Re; and the balance Fe as well as inevitable impurities. The production technology consists of the steps of: vacuum induction furnace and bottom blowing argon refining, continuous casting and rolling, annealing, straightening and polishing. With rational component design, the refined alloy for internal combustion engine valves has good wear resistance, antioxidation and anti-high temperature corrosion performances. And after annealing, the alloy has a basically uniform tempered sorbite structure, which is dispersed in lumps with a particle size of less than 10 micrometers. Thus, the overall performance of the alloy provided in the invention is superior to congeneric martensitic alloys of other grades for valves.

The invention discloses an energy-saving environment-friendly thick plate glass float production system which is characterized in that a storage bin is connected with two first bucket elevators, one first bucket elevator is provided with a first stock bin, the other first bucket elevator is provided with a second stock bin, and discharge pipes are arranged at the lower parts of the first stock bin and the second stock bin; a first control valve is arranged on the discharge pipes; the second stock bin is connected with a second bucket elevator, and a treatment box is arranged at the second bucket elevator; a feeding hole is formed in one end of the treatment box, two vertical partition plates are arranged in the treatment box, the treatment box is divided into a dust removal cavity, a drying cavity and a crushing cavity by the partition plates, and circulating slotted holes are formed in the vertical partition plates. Silica sand, aluminum hydroxide, dolomite, limestone, sodium carbonate, mirabilite and pulverized coal are adopted as raw materials, and a proper production process is selected, so that the glass is convenient to prepare.

The invention discloses a method for preparing a vegetarian dried meat floss product from cordyceps millitaris fermented glycine max dregs. A glycine max processing byproduct, namely glycine max dregs, is adopted as a raw material, through solid fermentation, flavor blending and frying with cordyceps millitaris, contents of two soy isoflavones, namely daidzein and glycitein, can be remarkably increased, the content of insoluble cellulose can be reduced, and the vegetarian dried meat floss product which is rich in aglycone isoflavones, proteins and edible fungi, is cotton-like and fluffy and has sensitive, physical and chemical and microorganism indexes similar to those of dried meat floss is prepared. The product prepared by using the method is "natural, nutrient and low-grease", and expectation of different customers on nutrient and healthy foods can be met. Solid fermentation used in the method is a traditional and modern biological technology, is efficient and low-carbon, good in applicability and simple to operate, and is free of secondary sterilization; the cordyceps millitaris can be used as an edible fungus, the mycelia of the cordyceps millitaris is rich in nutrition, and the flavor and the drawing feeling of the product can be also improved. By adopting the method, the nutrition and functional value of the vegetarian dried meat floss leisure food can be effectively intensified, and great significances in increasing additional values of the vegetarian dried meat floss product and promoting comprehensive utilization of the glycine max dregs can be achieved.

The invention discloses a heat treatment method for improving room temperature plasticity of a composite prepared high silicon steel sheet. The method comprises the three links of heating and heat preservation, rapid cooling and low-temperature tempering. Heat preservation is carried out on a high-silicon steel composite board for 30-120 minutes in a temperature field which is not lower than 950 DEG C by utilizing the waste heat of the high-silicon steel composite board and the environment after the high-silicon steel composite board is subjected to diffusion annealing; the high-silicon steelcomposite board is cooled to the room temperature with the cooling speed of 100-200 DEG C/s by adopting a cooling medium; and the high-silicon steel composite board is heated to 150-250 DEG C again and heat preservation is carried out on the high-silicon steel composite board for 20-50 minutes, and air-cooling is carried out to cool the the high-silicon steel composite board to the room temperature. According to the heat treatment technology, transformation of the ordered phase can be inhibited, the order degree is reduced, and the residual stress is eliminated, so that the room temperature plasticity of the 6.5% high-silicon steel composite board can be remarkably improved.

The invention provides a basket lifting deoiling assembly, a vacuum frying tank containing the basket lifting deoiling assembly, and vacuum frying equipment containing the vacuum frying tank. The basket lifting deoiling assembly comprises a rotary unit, a lifting unit, and a basket rotary shaft, wherein the rotary unit comprises a speed reducer and a rotary driving component; the lifting unit hasa supporting sleeve and a lifting driving component; the lower end of the basket rotary shaft is connected with a basket component; an output shaft is arranged on the speed reducer; an axial mountinghole is formed in the output shaft; the free end of each a driving rod of the lifting driving component extends downwards into the supporting sleeve; the upper end of the basket rotary shaft penetrates through the axial mounting hole and is connected with the free end of each the driving rod along an axial fixed circumferential direction in a rotary manner; and the basket rotary shaft is mounted in the axial mounting hole along a circumferential fixed axial direction in a lifting manner. When the lifting driving component drives the basket assembly to complete the lifting action, the rotary driving component drives the basket assembly to rotate to realize deoiling.

The invention discloses a refined austenitic alloy for internal combustion engines. 0.027, S0.013, Cr20.16~21.86, N0.41~0.58, Nb1.03~1.13, Ni1.06~1.36, V0.75~0.87, the balance is Fe and impurities. The method includes the following steps: vacuum induction furnace, bottom blowing argon refining, continuous casting, continuous rolling, solid solution, water cooling, straightening and polishing. The object of the present invention is to provide an austenitic alloy for gas valve with reasonable composition design, good product comprehensive performance, low nickel content, greatly reduced energy consumption in production, and low preparation cost and its production process.

The invention discloses powder injection molding feeding manufacturing equipment which comprises a kneading device, an extruding device and a grain cutting device. A discharge outlet of the kneading device is communicated with a barrel inlet end of the extruding device, the grain cutting device is connected to a barrel outlet end of the extruding device, and powder materials are kneaded by the kneading device, then are directly fed into the extruding device, pass the extruding device and then are directly fed into the grain cutting device to be subjected to hot-cutting air-cooled granulation. The powder injection molding feeding manufacturing equipment for realizing powder injection molding feeding manufacturing effects has the advantages that large-scale continuous operation with high production efficiency can be carried out; the hot-state materials can be directly fed into follow-up machining links, accordingly, reheating temperature rise required by granulation procedures can be reduced, and energy consumption can be greatly decreased; labor can be saved, the efficacy of the equipment can be improved, the productivity can be enhanced, and the production cost can be reduced; crushing procedures which are carried out after intermediate cooling and solidifying can be reduced, dust can be prevented in material crushing procedures, and accordingly operation environments can be improved.

The invention discloses a melt-blown fabric manufacturing device and a melt-blown fabric manufacturing method. The melt-blown fabric manufacturing device comprises an extruder (1), a plurality of meltpumps (2) and a plurality of melt-blowing die heads (3), wherein the plurality of melt pumps (2) respectively communicate with the output end of the extruder (1); and the plurality of melt-blowing die heads (3) respectively communicate with the melt pumps (2), and the extruder (1) is a double-screw extruder or a multi-screw extruder. According to the melt-blown fabric manufacturing device, a PP raw material can be directly machined into melt-blown fabric, the using of a single-screw extruder for secondary heating is not needed, so that the production efficiency is improved, one line can be matched with multiple groups of die heads, so that the efficiency is improved by several times, meanwhile, starting can be realized by one person, and thus labor is saved. According to the technical scheme, the use of the single screw for secondary heating in the traditional process is saved, the performance of materials is further kept, meanwhile, a set of single-screw device is saved, moreover, one extruder is matched with two or more melt-blown fabric production lines, thus energy conservation and emission reduction are realized, the structure is simple, and the production efficiency is greatly improved.

The invention discloses a method for refining grains of austenitic stainless steel forged pieces. The method comprises the following steps of S1, forging and S2, heat treatment, wherein in the step S1, stainless steel ingots are forged, the initial forging temperature for forging is 1,000-1200 DEG C, the final forging temperature is 720-850 DEG C, the deformation rate is 0.01-0.45S<-1>, the totalforging ratio is not less than 3, and the forging ratio of the last fire is not less than 20% of the total forging ratio; and in the step S2, the forged pieces obtained in the step S1 are subjected toheat treatment at 1000-1200 DEG C for 1.0-2.0 min/mm to obtain the austenitic stainless steel forged pieces. Compared with the prior art, the austenite stainless steel forged pieces have more uniformand finer grain and good intergranular corrosion resistance, the tensile strength, the yield strength and the impact work of the austenite stainless steel forged pieces are increased at the same time, and the comprehensive performance of the austenite stainless steel forged pieces is improved.