4results about How to "Achieve strict control" patented technology

This invention relates to a method for producing thin-gauge low-density steel sheets using a lap-rolling process. The chemical composition of the steel sheet, by mass percentage, is: C: 0.70–1.20%, Si: 0.10–0.50%, Mn: 16.00–24.00%, P: ≤0.015%, S: ≤0.003%, Al: 7.00–10.00%, Ni: 4.00–8.00%, Nb+Ti: 0.02–0.20%, with the balance being iron and unavoidable impurities. The method includes the following steps: billet preparation, billet compositing, billet welding, compositing billet heating, compositing billet rolling, steel sheet separation, and compositing billet straightening. A low-density steel intermediate billet of a certain thickness and identical length and width is selected as the lap-rolling billet. After welding, thin-gauge low-density steel sheets with a thickness of 3–6 mm and a width of 2000–3500 mm are produced on a medium-thick plate mill. The steel plate has an Fe-Mn-Al-C series composition and a density of 6.90-7.10 g / cm³. 3 The finished steel plate has a yield strength ≥1000MPa, tensile strength ≥1100MPa, elongation ≥20%, and Charpy V impact energy ≥20J at -40℃. The rolled steel plate has good uniformity in shape, thickness tolerance ≤±0.25mm, and flatness ≤4mm / m.

The present application relates to the technical field of artificial intelligence and industrial process modeling, in particular to a time series data generation method and device based on Gamma variational autoencoder, comprising: modeling the latent variables by using Gamma distribution in the variational autoencoder, and when training the variational autoencoder, first, according to the constraint condition, normalizing each variable value of the original time series data in the training set as the training input, and then introducing a differentiable reparameterization sampling mechanism to sample the Gamma distribution constructed by the encoder output parameter, so as to solve the training instability problem existing in the traditional sampling method under the condition of small shape parameter, so that the trained variational autoencoder can significantly improve the constraint satisfaction rate and physical consistency of the generated time series data. The present application can stably generate high-quality time series data with good engineering usability.

The application belongs to the technical field of cable fire prevention, and relates to a fireproof cable groove and a preparation method thereof. The fireproof cable groove is installed at a joint of a railway viaduct or a tunnel cable trench, is made of a full inorganic material, and has a simple and easy-to-operate preparation method. The fireproof cable groove comprises a cable groove body and connecting pieces installed at two ends of the cable groove body. The cable groove body is sequentially nested from outside to inside with an outer fireproof structure shell, an intermediate thermal insulation layer and an inner fireproof inner container. The inner side of the slot of the outer fireproof structure shell is provided with an inwardly extending inward flange along the length direction, and the outer side of the slot of the inner fireproof inner container is provided with an outwardly extending outward flange along the length direction. The inward flange and the outward flange are arranged in a top-and-bottom corresponding mode, and are mechanically connected through the connecting pieces at the two ends. The cable groove has a unique nested structure, can realize efficient heat insulation under high-temperature long-time fire burning of 800 DEG C or above, has excellent outdoor weather resistance, corrosion resistance and convenient installation and maintenance, and can control the cost within an acceptable range of engineering.

The application provides a vacuum brazing process for improving the oxidation resistance of a GH4738 and GH3536 alloy assembly, and relates to the technical field of improving the oxidation resistance of an assembly of two different component alloys. The method comprises surface treatment of alloy parts to be welded to obtain clean alloy parts; assembling and fixing the two alloys; prepositioning of the filler metal; and finally, vacuum brazing heat treatment of the assembly with the filler metal. The application controls the gap size of the two alloy brazed joints by synergistically controlling the type and amount of filler metal, so that the alloy assembly has unexpected effects in terms of oxidation resistance, and the service life of the assembly in a high-temperature oxidation environment is improved. After the process of the application, the assembly reaches the complete oxidation resistance level under the condition of high-temperature oxidation at 730 DEG C, and the oxidation resistance is at least 1 times higher. The method is stable, easy to implement, low in cost, high in efficiency, and conducive to large-scale industrial production and popularization and application.