7results about How to "Prevent excessive volatilization" patented technology

The invention relates to a GH5605 cobalt-based high-temperature alloy and a manufacturing method thereof, and belongs to the technical field of metal smelting. The GH5605 alloy comprises the following chemical components: 0.05%-0.15% of C, less than or equal to 1.0% of Si, 1.0%-2.0% of Mn, less than or equal to 0.03% of S, less than or equal to 0.03% of P, 19.0%-21.0% of Cr, 9.0%-11.0% of Ni, 14.0%-16.0% of W, less than or equal to 3.0% of Fe and the balance of Co and other inevitable impurities. According to the manufacturing method, the GH5605 electrode bar is smelted through a vacuum induction furnace, refining and argon protection processes are adopted, and it is ensured that the Mn element content of the electrode bar is qualified. And in the vacuum consumable remelting process, argon with the pressure of 2000-3000 Pa is filled, so that the vacuum degree is reduced, Mn element volatilization is effectively inhibited, and section component uniformity is achieved. Detection shows that the Mn content at the edge, the 1 / 2 radius and the central part of the steel ingot meets the technical standard. The process is simple and efficient, the quality of molten steel is not affected, the performance consistency and production stability of the GH5605 steel ingot are remarkably improved, and the process is suitable for the high-end application field.

The invention provides a saline-alkali soil wheat planting method, and relates to the technical field of wheat planting. The method comprises the following steps: firstly, adopting pretreated desulfurized gypsum and potassium fulvate as a soil conditioner to improve the saline-alkali soil structure, then adopting a row-shrinking ridging planting mode, applying a base fertilizer in a drip irrigation manner, and cooperating with a compound microbial agent containing bacillus subtilis, chlorella and the like to enhance the soil activity, and through precise water and fertilizer integrated management in the wheat growth period, the soil quality is improved. And fertilizers such as urea and potassium phosphate and microbial agents are dripped in different growth periods, so that sufficient and balanced nutrition supply is ensured. The saline-alkali soil wheat planting method can remarkably improve the soil fertility of the saline-alkali soil, promote wheat root development and stress resistance, improve the wheat yield, optimize the water and fertilizer utilization efficiency and save resources, is suitable for practical application in drought saline-alkali soil and has wide popularization value.

The invention relates to the field of glass, in particular to ultrathin flexible cover plate glass as well as a preparation method and application thereof. The glass is composed of 10-30% of UTG cullet and 70-90% of a specific batch and contains SiO2, Al2O3, Na2O and the like, and the decolorizing agent is prepared by compounding NaNO3 and K2O according to the ratio of 1: 0.2-1: 1. The preparation method comprises the following steps: adding cullet at 1000 DEG C and 1200 DEG C in two stages, carrying out heat preservation and homogenization at 1200-1300 DEG C for 30-60 minutes, and carrying out melting clarification at 1500-1600 DEG C and temperature-controlled annealing. The thickness of the obtained glass is 30-70 microns, the surface pressure stress after chemical strengthening is larger than or equal to 680 MPa, and the bending radius is smaller than or equal to 1.8 mm. According to the method, by means of collaborative design of components and the process, high performance is guaranteed, waste recycling is achieved at the same time, and the method is suitable for folding mobile phones, flexible OLEDs and other devices.

The invention relates to a preparation method of a 2: 17 type samarium-cobalt permanent magnet, belongs to the technical field of metallurgical impurity removal, and solves the problems that rare earth samarium is greatly oxidized in the smelting and heat treatment process when the samarium-cobalt permanent magnet is prepared in the prior art, the oxidation loss of the rare earth samarium is large, and the performance of the magnet is not high due to oxide obstruction. A preparation method of a 2: 17 type samarium-cobalt permanent magnet comprises the steps that a vacuum induction furnace is adopted for smelting a metal raw material composed of multiple elementary substances, after the metal raw material is molten by 70%-100%, a strong reducing agent is added, and liquid alloy is obtained along with smelting of the metal raw material; the liquid alloy is subjected to pouring, powdering and profiling, and a permanent magnet blank is obtained; and performing micro-high-pressure sintering on the permanent magnet blank, and performing heat treatment to obtain the samarium-cobalt permanent magnet. And the preparation of the high-magnetic-performance samarium-cobalt permanent magnet is realized.

The utility model discloses a tower crane slewing bearing which comprises a positioning base, a containing cavity is formed in the positioning base, an outer bearing piece and an inner bearing piece are arranged in the containing cavity, the outer wall of the outer bearing piece is fixedly installed on the inner wall of the containing cavity, a first annular groove is formed in the inner wall of the outer bearing piece, and a second annular groove is formed in the inner wall of the inner bearing piece. A countersunk head groove is formed in the top of the outer supporting piece, an oil storage cavity is formed below the countersunk head groove, a worker can add lubricating oil into the oil storage cavity, the lubricating oil can enter the first annular groove through an oil feeding groove, and therefore the lubricating oil can enter the first annular groove; and the oil absorption sponge is arranged in the oil storage cavity, so that lubricating oil in the oil storage cavity can be absorbed, excessive volatilization is avoided, in actual use, the interior of the slewing bearing can be conveniently lubricated, maintenance is convenient, and abrasion is effectively reduced.

The invention belongs to the field of rubber materials, and provides a rubber composition for a tire steel wire belt layer and a preparation method thereof, and the rubber composition comprises 70-90 parts of natural rubber, 20-40 parts of epoxidized natural rubber, 5-7 parts of a tackifying system, 50-65 parts of carbon black, 2-5 parts of an anti-aging agent, and 4-6 parts of a sulfur system. The tackifying system is prepared through a reaction of benzimidazole, a thiuram compound and omega-brominated fatty acid benzyl ester, and the omega-brominated fatty acid benzyl ester is prepared through a nucleophilic substitution reaction of omega-brominated fatty acid and benzyl bromide. Benzimidazole and a thiuram compound are bridged through a flexible aliphatic chain to form a tackifying system molecule, and the molecule can be chelated with copper / zinc / iron and other metal ions on the surface of a steel wire through a benzimidazole part, so that the initial bonding strength between rubber and the steel wire is improved; the thiuram part improves the interface stress distribution of the steel wire belt layer rubber and the steel wire, and the bonding performance of the steel wire cord fabric layer is improved.

This invention belongs to the field of tea processing technology. It provides a novel comprehensive processing technique for improving the quality of summer and autumn black tea, comprising the steps of gentle shaking combined with UV-B-LED combined spectral withering, low-temperature controlled pressure gradient kneading, three-parameter linked dynamic fermentation, microwave-hot air coupled drying, and far-infrared variable-temperature aroma enhancement. Gentle shaking combined with UV-B-LED combined spectroscopy promotes the polymerization and transformation of flavor components; low-temperature controlled pressure gradient kneading allows for controllable cell breakage of tea leaves, promoting the outflow of tea juice; three-parameter linked dynamic fermentation increases the content of theaflavins and aromatic substances, improving the uniformity of fermentation; microwave-hot air coupled drying reduces aroma loss and improves drying efficiency; far-infrared variable-temperature aroma enhancement enriches the aroma of the tea, improves tea quality, and enhances the harmony and lasting sweetness of the tea soup. The resulting black tea has a complex aroma of flowers and honey, a bright red liquor, a mellow and refreshing taste, and a comprehensive sensory score as high as 95.6.