32results about How to "Control the heating rate" patented technology

The invention discloses a heating box control system for observing the thermal deformation of a piezoelectric device, and a control cabinet. The control system comprises a main switch which is configured to control the on / off of a first-stage temperature controller control signal circuit of a whole heating box. The first-stage temperature controller control signal circuit is configured to collecting the temperature of a central thermocouple in the heating box, and controls the on / off of two independent second-stage temperature controller control signal circuits connected with the first-stage temperature controller control signal circuit according to a collection value. Each second-stage temperature controller control signal circuit comprises a branch switch, an AC contactor circuit of a second-stage temperature controller and an AC contactor circuit of a heating plate, wherein the AC contactor circuits are controlled by the branch switch. Through the control of the connection of the two AC contactors, the system achieves the operation of the heating plate in the heating box or an object. Meanwhile, the signals of the thermocouples on the two heating plates are fed back to the corresponding second-stage temperature controllers, so as to feed back and adjust the heating temperature of the heating plates.

The invention discloses a method for recovering nitric acid by pyrolyzing nitrate. The method comprises the following steps: (1) conveying the nitrate into at least two preheaters, heating the nitrateto firstly liquefy the nitrate, and then heating the nitrate to a temperature less than decomposition temperature in order to obtain a nitrate hot fluid; (2) conveying the nitrate hot fluid into a decomposer, and heating the nitrate hot fluid with a high temperature gas to maintain the internal temperature of the decomposer at 500-800 DEG C in order to decompose the nitrate into a mixed gas and asolid powder; and (3) separating mixed gas and the solid powder, conveying a part of the mixed gas into a nitric acid recovery tank, heating the remaining mixed gas to 500-800 DEG C, and then returning the heated remaining mixed gas into the decomposer to heat the nitrate hot fluid in order to thermally decompose the nitrate hot fluid. The method for recovering nitric acid has the advantages of less corrosion damages to devices, no introduction of other impurity components and no interference in the heating process, good decomposition speed and decomposition rate of the nitrate, and high recycling rate of the nitric acid.

This invention relates to disk-type strip steel rapid cooling test apparatus for stimulating annealing process requirement of continuous annealing of strip steel, and its usage method. The apparatus comprises: a disk-type case, a disk-type sample fixing frame and a compensating wire that can rotate around a core axis in the case, a sample loading / unloading chamber, a heating / homogenizing chamber, a slow cooling / over-aging chamber, a spray cooling chamber and a water quenching chamber. When used, the compensating wire is connected to the surface of the sample, and then the sample is introduced into the above chambers in sequence. This invention has such advantages of large sample size, a wide variety of cooling methods, high cooling speed, simple apparatus, and low malfunction rate.

The invention belongs to the technical field of production of duplex stainless steel products used at low temperature and particularly relates to a thermal treatment method for improving low-temperature impact toughness of austenite-ferrite stainless steel with high requirements for performance indexes. The thermal treatment method comprises the steps: feeding forged austenite-ferrite stainless steel into a furnace at the feeding temperature of not greater than 350 DEG C and performing twice preheating; performing solution treatment; performing cooling, feeding the austenite-ferrite stainless steel into clear water with the initial temperature smaller than 10 DEG C, and retaining the austenite-ferrite stainless steel for 20 minutes at the cooling speed of 4-6 seconds / mm. An austenite-ferrite stainless steel solution treatment process comprises the steps of (1) heating, namely controlling heating speed, preheating temperature, solid solution temperature and retaining time at a low-temperature section, reducing thermal stress and simultaneously obtaining good duplex structural proportion and (2) cooling, namely adopting a quick low-temperature long-time water-cooling mode to prevent precipitation due to fragility phase and remarkably reducing the plasticity and the toughness of the steel.

A construct for heating a food item in a microwave oven comprises a base (102), a wall (104) extending upwardly from the base (102), a microwave energy shielding element (108) overlying at least a portion of the wall (104), and a microwave energy diffusing element (112) circumscribed by the microwave energy shielding element (108), where the microwave energy diffusing element (112) includes a plurality of microwave energy reflective elements (116) within a microwave energy transparent area (114).

The invention discloses a blade tip cutting coating preparation system capable of alleviating residual stress and an application method thereof, belonging to the technical field of material surface modification and coating. A blade tip cutting coating preparation system with the effect of relieving residual stress includes a blade fixing module, a first induction heating head and a second induction heating head, and the first induction heating head and the second induction heating head are located at the blade fixing wood block Directly above and on the side, by controlling the distance between the first induction heating head, the second induction heating head and the blade base, different parts of the blade base can be preheated with different temperature gradients, so as to slow down the residual stress and prevent the overheating of the blade root from affecting its mechanics Behavior. In addition, the refrigeration module can protect the circuit control module and the first induction heating head and the second induction heating head from being burned out.

A strip steel continuous annealing process simulation device, which includes a heating chamber, a soaking chamber, an overaging chamber, a cooling chamber, and a loading and unloading sample chamber installed sequentially from top to bottom, and also includes a sample transmission device; the heating chamber, The soaking chamber and the overaging chamber are made of one liner, which is integrated from top to bottom. The cooling chamber is set at the lower end of the overaging chamber. The cooling chamber is equipped with a cooling medium inlet, and the distance between the cooling medium jet box and the jet box is adjusted. Device; The sample transmission device includes a sample rack, a wire rope and a transmission motor. The strip steel continuous annealing process simulation device provided by the invention can simulate the process of large-sized samples, and has many cooling methods, fast cooling speed, simple equipment and low cost, and can continuously simulate the process of strip steel samples in the continuous annealing furnace. Heating, soaking, slow cooling, quick cooling, overaging process.