230results about "Bell type furnaces" patented technology

A continuous firing furnace of the present invention comprises: a muffle formed into a cylindrical shape so as to ensure a predetermined space; a plurality of heat generators placed at the peripheral direction from the muffle; and a heat insulating layer formed in a manner so as to enclose said muffle and said heat generators therein, said continuous firing furnace being configured such that a formed body to be fired, which is transported from an inlet side, passes through the inside of said muffle at a predetermined speed in an inert gas atmosphere and, then, is discharged from an outlet so that said formed body is fired, wherein said inert gas flows through: a space between said muffle and said heat insulating layer; and a space inside the muffle, in sequence.

A microelectromechanical heating apparatus and fluid preconcentrator device utilizing same wherein heating elements of the apparatus are sized and spaced to substantially uniformly heat a heating chamber within a heater of the apparatus. Tall, thermally-isolated heating elements are fabricated in Si using high aspect ratio etching technology. These tall heating elements have large surface area to provide large adsorbent capacity needed for high efficiency preconcentrators in a micro gas chromatography system (μGC). The tall heating elements are surrounded by air gaps to provide good thermal isolation, which is important for a low power preconcentrator in the μGC system.

The invention relates to a production process of a precise stainless steel band for a vehicle sealing pad. The production process comprises the following working procedures of: first cold rolling, solid solution, second cold rolling, spraying and degreasing, hot water spraying, hot wind drying, pre-bending straightening, stress relieving annealing, final bending straightening, finished product cutting, and the like. The production process adopts a 20-roller sendzimir mill and a unique rolling process to carry out cold rolling. Through the processes of degreasing, solid solution treatment, bending straightening, stress relieving annealing, and the like, the thickness tolerance undulation of a product is small, mechanical properties are stable, the plate flatness is good, the product is not easy to generate cracks and secondary deformation during stamping, and the quality of the product is obviously improved, thus the production process is suitable for industrial production and can meet the requirement for high quality of the vehicle part industry.

The invention comprises a furnace body and a furnace lid. There is a refractory furnace liner and a thermal-protective insulating layer inside of the furnace body. A molten mass portal is disposed on the side of the hearth bottom. An air outlet is disposed on the furnace wall. A hollow graphite electrode disposed in the center of the furnace lid extends into the furnace. In the hollow graphite electrode there is a passageway. A second electrode against the hollow graphite electrode and a graphite lead-out electrode connected with the second electrode are disposed at the bottom of the furnace body. An arc zone is formed between the hollow graphite electrode and the second electrode to generate hot plasma.

The invention relates to a process and a device for recovering and recycling protective gas of a bell-type bright annealing furnace. The process comprises the following steps of: performing cooling and condensation of oil and gas in refluxing protective gas of a bell-type bright annealing furnace group; allowing the cooled and condensed protective gas to enter a water separator to remove most of water and oil; allowing the cooled protective gas from which the oil and the gas are removed to enter a preceding stage buffer tank; after the protective gas is buffered by the preceding stage buffer tank, pressurizing by using a roots blower; allowing the pressurized protective gas to enter an oil absorption device to remove oil and enter a deaerator to remove oxygen; reacting in the deaerator to generate water and discharge heat; cooling the protective gas by using a cooler and removing water from the protective gas by using a condenser; allowing the cooled and dehydrated protective gas to enter the water separator to separate water; allowing the protective gas to enter an absorption regeneration drying device for removing water and impurities deeply; and performing decompression and voltage stabilization on the purified gas by using a post-stage buffering tank and then supplying the purified gas to the bell-type bright annealing furnace group. Through the process and the device, the refluxing protective gas of the bell-type bright annealing furnace group is recovered and purified and enters the annealing furnace to be recycled as the protective gas again.

The invention discloses 1800MPa-level plating-free thermoforming steel with a low high-temperature friction coefficient and a preparation method of the 1800MPa-level plating-free thermoforming steel.Main chemical components of the 1800MPa-level plating-free thermoforming steel comprise, by mass percent, 0.25%-0.35% of C, not larger than 0.5% of Si, 0.5%-1.5% of Mn, not larger than 0.020% of P, not larger than 0.010% of S, not larger than 0.50% of Cr, 0.01%-0.06% of Al, not larger than 0.04% of Ti, not larger than 0.5% of Nb+V+Mo, not larger than 0.003% of B and the balance Fe and inevitable impurities. Through optimization to components and processes, the surface state of the plating-free thermoforming steel raw material is improved, and a good thermoforming steel raw material is providedfor subsequent preparation of thermoforming parts.

The invention discloses a 390MPa grade cold-rolled phosphorus-containing IF high-strength steel strip and an LF-RH duplex production process thereof, and belongs to the technical field of production of interstitial-free steel. The steel strip comprises, by weight, less than or equal to 0.0050% of C, 0.030-0.055% of Si, 0.55-0.60% of Mn, 0.055-0.070% of P, less than or equal to 0.008% of S, 0.020-0.040% of Als, 0.035-0.050% of Nb, 0.015-0.035% of Ti, 0.0005-0.0010% of B and the balance Fe, Ca, Cr and inevitable trace elements. The production process flow comprises the steps of blast furnace hotmetal smelting, converter molten steel smelting, LF molten steel refining, RH molten steel refining, CSP sheet billet continuous casting and rolling, pickling cold continuous rolling, cover furnace annealing, leveling and inspection, packaging and storage. The composition design thoughts of micro-carbon smelting, [Nb, Ti] microalloying and solid solution strengthening of P and Mn are adopted, the390MPa grade cold-rolled phosphorus-containing IF high-strength steel strip with stable chemical compositions and stable mechanical properties is obtained through an LF-RH duplex refining process, hot rolling, cold rolling and an annealing process, the production cycle is short, the production cost is low, the steel strip is stable in quality, and the requirements of the automobile industry on the high-strength steel strip can be met.

The invention discloses TRIP (Transformation-Induced Plasticity) steel with low carbon content and high manganese content and a production method thereof, belonging to the technical field of steel products. The TRIP steel is the steel with the low carbon content and the high manganese content. The production method of the TRIP steel comprises the steps of smelting, thermal and continuous rolling, acid-washing in a push-pull manner, cold rolling, annealing in a cover manner and flattening. The yield strength of the TRIP steel is 400-900 MPa. The tensile strength of the TRIP steel is 1000-1500 MPa. The bake hardening value of the TRIP steel is 30-70 MPa. The TRIP steel can be applied to automobile components, and therefore, the TRIP steel has good application prospect in the respects of reducing the weight of an automobile and increasing the safety.

The invention provides an off-line predicting method for annealing process of a hood type steel coil, which comprises predication at heating phase, soaking phase and cooling phase. The predication at heating phase comprises calculation of smoke temperature, calculation of heating hood temperature, calculation of the updating for protective gas property and flow field, calculation of inner hood temperature, calculation of protective gas temperature, and calculation of steel coil temperature field; the predication at soaking phase comprises calculation of smoke temperature, reverse calculation of fuel volume, calculation of heating hood temperature field, calculation of the updating for protective gas property and flow field, calculation of inner hood temperature, and calculation of steel coil temperature field; the predication at cooling phase comprises calculation of cooling media temperature, calculation of cooling hood temperature, calculation of protective gas physical property and flow field, calculation of inner hood temperature, calculation of protective gas temperature and calculation of steel coil temperature field. The off-line predicting method can give max. role of the producing capability of a coil base.

The invention discloses 700MPa-grade cold rolled steel plate with high weather resistance and a preparation method thereof. In the invention, a thin plate black continuous casting and continuous rolling flow is adopted. The refined molten steel mainly comprises the following chemical components: 0.03 to 0.07 weight percent of C, less than or equal to 0.35 weight percent of Si, 0.4 to 1.8 weight percent of Mn, less than or equal to 0.020 weight percent of P, less than or equal to 0.010 weight percent of S, 0.25 to 0.50 weight percent of Cu, 0.25 to 0.80 weight percent of Cr, 0.05 to 0.30 weight percent of Ni, 0.06 to 0.20 weight percent of Ti, and the balance of Fe and inevitable impurities. In an annealing process, steel is annealed in a cover annealing furnace at the temperature of 500 DEG C to an A1 transition point. The yield strength of the cold rolled steel plate with high weather resistance exceeds 700MPa, and the elongation rate is over 5 percent, and the cold rolled steel plate has high machinability and high weather resistance.

A novel batch-type kiln and a method of use thereof are provided. The kiln comprises a kiln body and a heating chamber disposed within the kiln body, which has a heater disposed therein. A table is disposed at the bottom of the heating chamber, the table having a peripheral portion and an upper surface for supporting an object to be treated. The peripheral portion of the table and a portion of the kiln body define a gap therebetween. This gap forms a gas-introducing path for introducing a gas into the heating chamber. The batch-type kiln is capable of preventing accumulation of a binder component in the gap between the table and the kiln wall.

The invention relates to a convective stacking method of a hood-type annealing furnace, in particular to a suspended-type convective stacking method used on the hood-type annealing furnace. The method is characterized in that: first, the inner rings of steel strip rolls are attached with sleeves; second, one steel strip roll is stacked on a charging floor of the annealing furnace, a convective plate is arranged above the steel strip roll in an overlapping manner, the bottom of the convective plate is matched with the sleeve in the steel strip roll, the sleeve supports the convective plate, and the upper surface of the steel strip roll is not contacted with the convective plate; third, the steel strip roll is put on the convective plate in an overlapping manner, the lower surface of the steel strip roll is contacted with the convective plate, and the sleeve in the steel strip roll is positioned on the upper part of the convective plate, so that all the steel strip rolls are installed layer upon layer in an overlapping manner. The convective stacking method can lead only the lower surfaces of the relative steel strip rolls to be contacted with the convective plate, and lead the upper surfaces thereof to be not contacted with the convective plate, thereby solving the problem that the lower layer steel strip rolls are pressed lengthways in traditional equipment; therefore, the bonding incidence rate of the lower layer steel strip rolls is greatly reduced, in addition, the lengthways folding occurrence probability of the steel strip rolls is also reduced correspondingly.

A boron containing steel plate for heat treatment and a manufacturing method thereof. The steel plate comprises 0.15-0.4wt% of C, 0.20-0.60 wt% of Si, 1.00-2.00wt% of Mn, P no more than 0.030wt%, S no more than 0.015wt%, N no more than 0.008wt%, 0.0005-0.005wt% of B, 0.02-0.06wt% of Al, 0.1-0.5wt% of Cr, and 0.01-0.08wt% of Ti, wherein an atomic ratio of Ti to N is 1-50, and others are Fe and inevitable impurities. According to the invention, a contradiction between that steel plate is not easy to be shaped complexly and that a final component intensity is required to be higher than 1000Mpa can be solved. A routine manufacturing process is employed in the invention to produce the steel plate, so that a set does not need to be reconstructed or upgraded, and production costs are low. The steel plate of the invention can be used for manufacturing automobile safety components such as reinforcement rod in vehicle door, back and forth bumpers, and A/B column reinforcements.

The invention discloses low-silicon cold rolled precision strip steel for copper-lead bearing steel back and a production method thereof. The strip steel comprises the following chemical components in percentage by weight: 0.09 to 0.15 percent of C, less than or equal to 0.01 percent of Si, 0.25 to 0.55 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.015 of S, 0.02 to 0.06 percent of Al, and the balance of Fe and inevitable impurities. The production method comprises the steps of molten iron desulfuration, refining in a converter, argon blowing, continuous casting, slab heating, hot continuous rolling, laminar cooling, coiling, acid cleaning, cold rolling, whole hydrogen cover annealing, levelling, finishing and the like. By detecting the comprehensive mechanical property of the strip steel, the strip steel has the advantages of high strength, high hardness, excellent cohesiveness and high surface accuracy; and the method has the advantages of simple production process and low production cost.

A process for avoiding the bonding of cold rolling strip steel and a hood-type annealing furnace without bonding belong to the heat treatment field. The invention provides a process for avoiding the bonding of cold rolling strip steel aiming at the problem of strip steel bonding existing in the process that the hood-type annealing furnace is annealed for strip coils, controls the cooling speed of the strip coils from the inner ring of strip coils and the middle portion of strip coils to the outer ring of strip coils in turn. Simultaneously the invention provides a hood-type annealing furnace without bonding, which comprises a hood body which is fixed on the furnace platform, wherein a cooling system is axially arranged in the hood body, and the cooling system is fixed on the furnace platform. The phenomenon of bonding can be avoided through cooling down steel rings through the process of the invention, and the situation of waste product caused by the bonding of experimental steel ring is completely overcome. Simultaneously the purpose of non bonding can be well realized through placing steel ring into the hood-type annealing furnace of the invention, and the improvement on the original hood-type furnace can be carried out, therefore the process has the advantages of excellent benefits, favorable effect, less investment and expansive market prospect, and is beneficial for application and popularization.

The invention relates to stainless steel for a high-performance B4003M truck. The stainless steel comprises the following components in percentage by mass: 0.010 to 0.015 percent of C, 0.20 to 0.60 percent of Si, 0.80 to 2.5 percent of Mn, 11.0 to 13.0 percent of Cr, less than or equal to 0.040 percent of P, less than or equal to 0.010 percent of S, 0.60 to 1.5 percent of Ni, less than or equal to 0.020 percent of N, less than or equal to 0.20 percent of Cu, less than or equal to 0.0050 percent of O, 0.10 to 0.30 percent of Ti, less than or equal to 0.030 percent of C and N, and the balance of Fe and inevitable impurities. The yield strength of the stainless steel reaches over 350MPa, and the elongation reaches over 25 percent. In the length of the whole strip steel, the performance of the strip steel is very uniform; and the yield of the finished strip steel is improved.

The invention relates to a cover-type furnace generating steam by using waste heat. The bell-type furnace generating steam by using waste heat comprises a furnace platform, a stock supporting plate, a heating cover and a cooling cover, wherein the stock supporting plate is located above the furnace platform; a circulating fan device is arranged at the lower part of the furnace platform; the heating cover is provided with a heating nozzle; the heating nozzle is connected with gas and air pipelines; the cooling cover is provided with a steam generator; the steam generator consists of a heating jacket and a steam coil pipe; the steam generator is provided with a water inlet and a steam outlet; the water inlet is located at the lower part of the steam generator; the steam outlet is located at the upper part of the steam generator; the water inlet is connected with a water pipeline; and the steam outlet is connected with a steam pipe net. By additionally mounting the steam generator on the inner wall and the top of the cooling cover, the steam is generated by using the heat radiated in the cooling process after thermally treating steel billets, incorporated into the steam pipe network and used for generating via a generator or other purposes, so that the cover-type furnace generating steam by using waste heat has the advantages of making full use of the waste heat in the thermal treatment on the steels, saving energy, reducing thermal treatment production cost and being good for environment protection.

The invention discloses a cold-rolling production process of high-carbon steel. The cold-rolling production process comprises the following steps of pickling, first annealing, first calendering, second annealing, second calendering, third annealing, finishing and warehousing of finished products. According to the cold-rolling production process, the first annealing temperature after pickling is reduced, so that production is carried out in a conventional annealing furnace, the production cost is lower, the service life of the production equipment is prolonged, and the produced products have excellent performance.