1270results about How to "Improve refinement" patented technology

A search system and method for searching for electronic documents, and providing a search result in response to a search query. In one embodiment, the search system includes a processor, a user interface module adapted to receive a search query from a user that includes a search query term, a search engine that electronically searches for electronic documents that satisfy the search query term, and a query processing module that identifies at least one alternative term for the search query term, and provides the alternative term to the user interface module for display to the user, and also provides the alternative term to the search engine to search for electronic documents that satisfy the alternative term.

The invention discloses a high-hardness hypereutectic high Cr-Mn-Mo-tungsten alloy abrasion-resistant steel and iron material which adopts multivariant alloying and has the advantages of good hardenability, high hardness, better abrasion-resistance and wear resistance, and the like compared with the prior high-chromium cast iron especially the addition of C, Cr, Mn, Mo and tungsten, thereby enlarging the application range of materials. The invention is suitable for preparing wearing and corrosive wearing parts, in particular to parts used for impacting corrosive wearing working conditions.

The invention relates to a cast aluminum-silicon alloy for an engine cylinder head and a heat treatment process. The alloy comprises the following chemical ingredients in percentage by weight: 5.0 to 7.0 percent of Si, 3.0 to 4.0 percent of Cu, 0.2 to 0.4 percent of Mg, 0.1 to 0.3 percent of Mn, 0.10 to 0.20 percent of Zr, 0.15 to 0.25 percent of Ti, 0.01 to 0.05 percent of B, 0.02 to 0.09 percent of Sr, 0.1 to 0.3 percent of rare earth (RE), less then 0.3 percent of Fe and the balance Al, wherein the rare earth (RE) adopts mixed rare earth. The heat treatment process comprises the following steps: carrying out primary solution at a temperature between 490 DEG C and 505 DEG C, and carrying out heat insulation for 4 to 6h; carrying out secondary solution at a temperature between 510 DEG C and 525 DEG C, carrying out heat insulation for 6 to 10h, and carrying out quenching by hot water of 60 to 80 DEG C; and carrying out aging treatment with parameters of the aging temperature being 155to 165 DEG C and the heat insulation time being 5 to 9h, and carrying out cooling in the air. All alloy elements of the cast aluminum-silicon alloy provided by the invention are reasonably matched, good mechanical performance is realized, at a normal temperature, the tensile strength reaches 325 to 355MPa, the tensile stretch is 2.5 to 5.5 percent, at a high temperature of 250 DEG C, the tensile strength reaches 240 to 270MPa, and the tensile stretch is 3.0 to 5.5 percent, after the heating processing technology, the heat resistance performance of the alloy is improved, and the casting defect is reduced.

The invention discloses high-strength high-toughness low temperature steel for ship and manufacture method thereof. The steel is composed of (by wt%) C 0.04-0.12, Si 0.20-0.55, Mn 0.8-1.4, P 0.005-0.015, S less than or equal to 0.005, Als 0.02-0.07, N less than or equal to 0.005, Cu 0.05-0.40, Ni 0.05-0.50, and Fe and unavoidable impurity in balance, with Ni / Cu of 1.2-1.5; and one or more than two of Nb 0.005-0.03, Ti 0.005-0.02, Ca 0.001-0.006, and Mg 0.0005-0.002. The steel has advantages of low compression ratio, high strength, good low temperature impact energy, good texture uniformity, and good elongation, to ensure low hardenability and cold crack resistance of repair welding heat-affected zone even if under polar climate condition.

A control method for drying tobacco shreds features use of dual-loop control and two control modes. After the upper and lower temp limitations of cylinder wall are set up by system, the temp of cylinder wall is regulated for automatically controlling the content of water in tobacco shreds. After the temp of cylinder wall is fixed, the flow of hot-air is regulated to control the content of water in tobacco shreds. Otherwise, after the upper and lower limitations of the flow of hot air ar set up, the flow of hot air is regulated to control the content of water in tobacco shreds or after the flow of hot-air is fixed, the temp of cylinder wall is regulated to control the content of water in tobacco shreds.

The invention relates to a method for modification and refinement of a hypoeutectic and eutectic Al-Si alloy. The hypoeutectic and eutectic Al-Si alloy with the Si content of 2-13.5 wt.% is subjected to modification and refinement treatment with Sr and B; after treatment, the Sr content in an alloy melt is 0.005-0.1%, the B content is 0.005-0.1%, and the mass ratio of Sr to B is 0.3-5. An Al-B intermediate alloy is used as a refiner, and has excellent grain refining effect on the Al-Si alloy; an Al-Sr intermediate alloy is used as a modifier, can effectively modify eutectic Si in the Al-Si alloy. By controlling melting, modification and refinement treatment processes, the grain refiner also has good refinement effect on alpha-Al while the added modifier has good modification effect on the eutectic Si, so that an ingot microstructure is simultaneously modified and refined, and a mutual poisoning effect between Sr and B can be effectively avoided.

The present invention relates to a method for grain refining of steel. A grain refining alloy having a composition FeXY where X is one or more elements selected from the group consisting of Cr, Mn, Si, Ni, and Mo and where Y is one or more oxide and / or sulphide and / or nitride and / or carbide forming elements selected from the group consisting of Ce, La, Nd, Pr, Ti, Al, Zr, Ca, Ba, Sr, Mg, C and N where X is between 0.001 and 99 % by weight based on the weight of the alloy and where Y is between 0.001 and 50 % by weight of the alloy, said alloy additionally containing between 0.001 and 2 % by weight of oxygen and / or between 0.001 and 2 % by weight of sulphur, said alloy containing at least 10<3> inclusion particles per mm<3> consisting of oxides and / or sulphides and / or carbides and / or nitrides of one or more of the Y elements and / or one or more of the X elements Cr, Mn and Si in addition to Fe, said inclusion particles having a mean diameter of less than 10 mu m, is added to molten steel in an amount of between 0.01 and 5 % by weight based on the weight of the steel, whereafter the steel is cast. The invention further relates to a grain refining alloy for steel and to a method for producing grain refining alloys.

The invention discloses an industrial intelligent manufacturing data acquisition apparatus and method based on the Internet of Things. The apparatus comprises a data acquisition module, a data transmission module, a data analysis module, a data processing module, a data storage module, a data interaction display module and a monitoring module, the data acquisition module is connected with a control system of an industrial Internet of Things equipment machine tool through an acquisition protocol, the data acquisition module, the data transmission module, the data analysis module, the data processing module, the data storage module and the data interaction display module are connected in sequence, and the monitoring module is connected with the control system of the industrial Internet of Things equipment machine tool through the acquisition protocol. According to the method and apparatus, data acquisition, analysis, transmission, storage and monitoring are performed for industrial Internet of Things factory equipment machine tools and robot equipment etc., the work efficiency is improved, the production cost is reduced, the information interaction between industrial equipment and production management personnel is enhanced, the efficiency of the equipment is improved, and intelligent and datamation management of factory processing equipment can be realized.