506 results about "Chemical Ingredients" patented technology

The invention relates to a transparent lead-free fritted glaze with low expansion coefficient and a preparation method thereof. The fritted glaze comprises the following chemical ingredients of: 59 to 66 percent of SiO2, 10 to 15 percent of Al2O3, 5 to 10 percent of B2O3, 3 to 6 percent of CaO, 4 to 8 percent of MgO, 0 to 3 percent of K2O, 0 to 2 percent of Na2O, 0 to 1 percent of Li2O, 1 to 5 percent of ZnO and 0 to 2 percent of SrO; and the fritted glaze comprises the raw materials of: 10 to 25 percent of kaolin, 15 to 30 percent of quartz, 10 to 25 percent of potassium feldspar, 0 to 8 percent of dolomite, 2 to 6 percent of grammite, 10 to 20 percent of roasted talc, 1 to 6 percent of zinc oxide, 2 to 8 percent of boric acid, 5 to 15 percent of calcium borate, 1 to 5 percent of alumina, 0 to 2 percent of lithium carbonate and 0 to 3 percent of strontium carbonate. The expansion coefficient of the fritted glaze is 3.7-4.5*10-6/DEG C (RT to 500 DEG C), the melted temperature is 1400 DEG C to 1500 DEG C, the glaze firing temperature is 1130 DEG C to 1230 DEG C; and the transparent lead-free fritted glaze has fine and bright glaze surface, high transparency, low expansion coefficient as well as no lead precipitation and is particularly suitable for double-fired hard porcelain body with lower expansion coefficient.

The invention relates to the field of metal materials, in particular to a high-plasticity magnesium alloy and a preparation method thereof. The alloy comprises the following chemical components in percentage by mass: 0.1 to 6.0 percent of aluminum, 0.1 to 3.0 percent of tin, 0.01 to 2.0 percent of manganese, 0.01 to 2.0 percent of strontium and the balance of magnesium and other inevitable impurities; simultaneously, the magnesium alloy can also contain one or more of additional elements such as zinc and stibium and rare earth elements. The preparation method comprises the following steps of: melting the magnesium and the aluminum, adding the tin, the additional elements, the rare earth elements and the strontium in turn, stirring and refining, and preparing a melt into a plate by a cast-rolling and rolling process; or directly pouring the melt into a cast ingot; or pouring the melt into the cast ingot, extruding the cast ingot into a section or a thick plate and rolling the thick plate into a thin plate. The preparation method enhances the intensity and toughness of the alloy and overcomes the defects that a cast magnesium alloy is difficult to adapt to a deformation condition and a deformed magnesium alloy is difficult to adapt to a casting condition.

The invention relates to a hardening and tempering high-strength steel plate for wood based panel equipment and a production method of the steel plate, and belongs to the field of manufacturing low-alloy high-strength structural steel. The steel plate consists of the following chemical components in percentage by weight: 0.18 to 0.24 percent of C, 0.20 to 0.50 percent of Si, 0.80 to 1.20 percent of Mn, more than or equal to 0.02 percent of P, more than or equal to 0.01 percent of S, 0.20 to 0.50 percent of Mo, 0.20 to 0.50 percent of Ni, 0.70 to 1.00 percent of Cr, more than or equal to 0.003percent of B, 0.017 to 0.030 percent of Nb, 0.040 to 0.050 percent of V, 0.017 to 0.026 percent of Ti, and the balance of Fe and inevitable impurities. The production method of the steel plate comprises the following steps of: electric furnace smelting, vacuum decarburization /vacuum arc decarburization (VD/VOD) furnace vacuum decarburization, ladle furnace (LF) furnace refining, continuous casting (die casting), billet steel (ingot) clearing, heating, plate rolling, hardening and tempering, steel plate checking and polishing, tempering, sampling inspection, and warehousing. The hardening andtempering high-strength steel plate for the wood based panel equipment adopts Cr-Ni-Mo-B system micro-alloy elements for composite strengthening, and acquires good obdurability matching through a reasonable heat treatment process, and simultaneously the welding performance of a thick plate is not reduced.

The invention discloses a new mean production control type threshing and redrying method, which comprises a raw material preparation process, a threshing process, a redrying process and a packaging process. A process for the near infrared online detection of chemical ingredient contents of tobacco leaves is added before the threshing and redrying and after the threshing and redrying respectively, and the online detection of a near infrared spectrometer cooperates with a computer control system before redrying and links with threshing and redrying equipment to form closed-loop control. In the invention, the addition of the near infrared online detection process before leaf redrying realizes the mean management of threshing and redrying line, eliminates the defect of the past threshing and redrying technique that the control indexes of inner quality are short, thus laying a good foundation for threshing and redrying enterprises to improve processing level and satisfying the requirements of cigarette processing enterprises. The addition of the near infrared online detection after redrying ensures that each box of products have labels of chemical ingredient content data, thus providing powerful data reference for tobacco alcoholization and cigarette prescription, and leading all jobs to have relatively accurate chemical index data as basis.

The invention discloses a welding method of Q420qE grade ultra-low-carbon bainite steel for bridges, comprising the following steps: 1. the special chemical ingredients and technical conditions of Q420qE grade ultra-low-carbon bainite steel for bridges related to the welding method; 2. the pre-heating temperature before welding related to the steel and thickness specification of the steel; 3. welding line energy related to the steel; 4, the groove form and welding method related to the joint form and the plate thickness of the steel; 5. welding materials related to the steel, the joint form, groove form and welding method of the steel; and 6. welding process parameters related to the steel, the joint form, groove form, welding method and welding materials of the steel. The welding method covers the typical joint forms and thickness specifications of the bridge structure, and is simple and practical, the implementation effect of which complies with the related standards of the present bridge steel and the bridge structure, thus being practically applied to welding of the bridge steel structure.

The invention provides a high-strength steel plate for an 800MPa hydropower station pressure pipeline and a production method thereof, and belongs to the technical field of steel for hydropower stations. The steel is composed of the following chemical ingredients in percentage by weight: 0.08-0.10% of C, not larger than 0.25% of Si, 1.2-1.6% Mn, not larger than 0.013% of P, not larger than 0.02% of S, 0.01-0.03% of Nb, not larger than 0.03% of V, 0.01-0.02% of Ti, 0.15-0.50% of Ni, 0.20-0.60% of Cr, 0.05-0.30% of Mo, 0.0010-0.0015% of B and the balance of Fe and inevitable impurities. Since element ingredients are reasonably combined and designed and corresponding rolling and heat treatment techniques are matched, the steel plate has excellent welding adaptability while having excellent strength, plasticity and low-temperature impact toughness, and the welding cold cracking sensitivity index Pcm is not larger than 0.22%.

The invention discloses low-alloy high-strength steel with yttrium-based rare earth. The low-alloy high-strength steel with the yttrium-based rare earth comprises the following chemical ingredients in percentage by mass: 0.08-0.19% of C, 0.15-0.55% of Si, 1.20-1.70% of Mn, not greater than 0.040% of P, not greater than 0.040% of S, not greater than 0.040% of Nb, not greater than 0.18% of V, not greater than 0.020% of Ti, not greater than 0.40% of Ni, not greater than 0.30% of Cr, not greater than 0.30% of Cu, not greater than 0.08% of Mo, not greater than 0.050% of Alt, not greater than 0.012% of N, 0.002-0.003% of O, and balance iron Fe, rare earth and inevitable impurities, wherein the rare earth is the yttrium-based rare earth; the steel comprises the following dissolved solid matters: 0.004-0.010% of Y, and 0.014-0.025% of Ce, and the residues exist in the form of combining Y and Ce with O, Mg, Al and S in the steel to form small dispersed compound inclusions; the compound inclusion component contains, in percentage by mass, 25.40-70.10% of Y, and 3.25-19.15% of Ce; and a matrix structure of the steel is a fine ferrite and perlite structure. The low-alloy high-strength steel disclosed by the invention is improved by utilizing the yttrium-based rare earth for exerting the effects of purification, modification, microalloying and oxide metallurgy in the steel.

The invention relates to a ferrite stainless steel cold-rolled steel band and a manufacturing method thereof. The ferrite stainless steel cold-rolled steel band comprises the following chemical ingredients in percentage by weight: 0.02%-0.04% of C, 0.10%-0.50% of Si, 0.10%-1.00% of Mn, 14.0%-19.0% of Cr, less than or equal to 0.030% of P, less than or equal to 0.010% of S, more than 0% while lessthan or equal to 0.030% of N, more than 0% while less than or equal to 0.60% of Ni, and the balance of Fe and unavoidable impurities. The manufacturing method comprises the following steps: (1) smelting, i.e. smelting liquid steel according to the requirement of the steel band; (2) continuous casting, i.e. casting into a continuous casting billet; (3) casting billet hot rolling, i.e. rolling the casting billet into a hot rolled coil; (4) hot coiling annealing, i.e. preserving the temperature at 800 DEG C-880 DEG C for the temperature preserving time of 10-13 hours, freely reducing the temperature to 600 DEG C after the temperature preservation is completed; (5) cold rolling, i.e. adopting once cold rolling or twice cold rolling among cold rolled finished products; and (6) cold coiling annealing, i.e. controlling annealing temperature at 860+/-20 DEG C, and controlling annealing time according to 2-5 minutes/mm. The ferrite stainless steel cold-rolled steel band has good cold processingforming property and excellent crinkling and breaking resistance.

The invention discloses high-strength and high-toughness hot-rolled wear-resistant steel and a preparation method thereof. The high-strength and high-toughness hot-rolled wear-resistant steel comprises the following chemical ingredients in percentage by weight: 0.20-0.50% of C, 0.8-2.0% of Si, 1.5-3.0% of Mn, not greater than 0.015% of P, not greater than 0.005% of S, 0.02-0.08% of Al, not greater than 0.006% of N, not greater than 30 ppm of O, 0.005-0.015% of Ti, 0.5-2.0% of Ni, and the balance of Fe and inevitable impurities, wherein the sum of Mn and Ni is 3.2-3.6%; the microscopic structure is composed of lath martensites and retained austenites, and the volume percentage content of the retained austenites is 5.0-15.0%; and the high-strength and high-toughness wear-resistant steel obtained by the processes of hot continuous rolling and rapid quenching has a tensile strength of greater than 1500 MPa, a yield strength of 1150-1400 MPa, a thickness of 3-12 mm, a good ductility (of greater than 10%), and a good low-temperature impact toughness (impact energy of 38-48 J at minus 20 DEG C), and shows excellent strong-plastic matching.

The invention provides a sulfide solid electrolyte based on oxygen doping. The sulfide solid electrolyte is prepared from the chemical ingredients, in percentage by mass: 36-60% of lithium sulfide orlithium selenide, 18-48% of phosphorus pentasulfide or phosphorus selenide, 1-23% of metal oxide or specific nonmetallic oxide and 8-37% of lithium chloride, lithium bromide or lithium iodide. The preparation method of the sulfide solid electrolyte mainly comprises the steps that the raw materials are sufficiently blended and subjected to tabletting, then placed in a quartz tube to be burned and sealed, the product is placed in a muffle furnace and heated to be 400-600 DEG C at a slow heating rate, the optimal heating rate is 0.3 DEG C/minute, heat preservation is conducted for 12-48 hours, and then the product is cooled to reach the room temperature; and the product is ground to be powder, and the sulfide solid electrolyte based on oxygen doping is prepared. The sulfide solid electrolyteis easy to prepare and high in repeatability, the prepared solid electrolyte has the high ionic conductivity and good stability to the air and positive and negative electrodes.

The invention provides an ultra-high strength strapping raw sheet and a manufacturing method thereof. The raw sheet comprises the following chemical components by weight percent: 0.15-0.60% of C, 0.25-1.80% of Si, 1.0-3.5% of Mn, the balance of Fe and inevitable impurities, wherein one or more of 0.05-1.00% of Cr, 0.05-0.50% of Ni, 0.01-0.50% of Mo, 0.002-0.010% of B, 0.01-0.10% of Ti, 0.01-0.10% of V, and 0.01-0.10% of Nb also can be added to the steel. The manufacturing method of the raw sheet mainly adopts the processes of smelting, casting, hot rolling, pickling and cold rolling; the hot rolling finishing temperature is 850-950 DEG C; the hot-rolling coiling temperature is 550-750 DEG C; and the cold rolling reduction ratio is 50-70%. The tensile strength of the raw sheet disclosed by the invention after the process of isothermal quenching, or quenching and tempering can achieve over 1250 MPa; the extensibility can be up to over 12%; the requirements of wool and cotton packaging on the high strength and high tenacity are met; the section size of the strapping steel is reduced; consumption of steel products is reduced; and the ultra-high strength strapping raw sheet has a broad popularization and application prospect.

The invention relates to the technical field of a coffee maker material, and particularly relates to a high-wear-resisting stainless steel coffee maker material and a preparation method thereof. The high-wear-resisting stainless steel coffee maker material comprises the following elements in percentage by weight: 0.08-0.12% of C, 0.06-0.1% of N, 0.15-0.55% of Si, 0.6-1% of Mn, 11.5-13.5% of Cr, 0.1-0.3% of Ni, 0.6-1% of Mo, 0.2-0.6% of Al, 0.05-0.25% of Zr, 0.01-0.05% of Y, 0.6-1% of Nb, 0.05-0.15% of Ti and the balance of Fe and impurities. The high-wear-resisting stainless steel coffee maker material has relatively high hardness and wear resistance by strictly controlling the content of each element, is low in production cost and also has relatively high strength, toughness, heat resistance, corrosion resistance and excellent combination property.

The invention relates to welding wires, in particular to high-strength welding wires needing hardening and tempering after welding, comprising the following chemical components by weight percent: 0.03-0.12 wt% of C, 0.30-0.80 wt% of Si, 1.2-2.2 wt% of Mn, 1.0-2.0 wt% of Ni, 0.05-0.30 wt% of Cu, 0.10-0.50 wt% of Cr, 0.20-0.80 wt% of Mo, 0.03-0.20 wt% of Ti, equal to or less than 0.015 wt% of S, less than or equal to 0.020 wt% of P, and the balance Fe and inevitable impurity elements. As for the welding wires after rich Ar gas shielded welding, under the thermal refining state, the mechanical property of the obtained welded metal is follows: yield strength ReL is equal to or greater than 630MPa, tensile strength Rm is equal to or greater than 780MPa, elongation A is equal to or greater than 20%, and absorbed energy Akv is equal to or greater than 60J under the temperature of -40 DEG C. The welded metal of the welding wires has high strength, good low-temperature toughness and favorable welding technological property after hardening and tempering.

The invention relates to high-nitrogen non-magnetic austenitic stainless steel. The high-nitrogen non-magnetic austenitic stainless steel comprises following chemical components including, by weight percent, 0.01% to 0.10% of C, not larger than 1.0% of Si, 17.0% to 24.0% of Mn, not larger than 0.035% of P, not larger than 0.015% of S, 1.0% to 4.0% of Ni, 17.0% to 24.0% of Cr, not larger than 1.0%of Mo, 0.50% to 0.80% of N and the balance Fe and inevitable impurities. The manufacturing method comprises the steps that the electric furnace+AOD+LF manner is adopted for smelting, continuous casting or die casting is adopted for making a slab ingot, and during continuous casting, the superheat degree is controlled to be smaller than 50 DEG C; a continuous casting blank or die casting slab ingotis put into a stepping type heating furnace to be heated, hot rolling on a rolling machine is carried out to form a board of the needed specification, the final rolling temperature ranges from 800 DEG to 950 DEG C, the hot-rolled board is subject to acid pickling, and the high-nitrogen non-magnetic austenitic stainless steel hot-rolled board finished product is obtained. The product has high yield strength, good ductility and toughness, corrosion resistance and wide application field and has no magnetism.

The invention relates to a method for using hot isostatic pressing to produce a double-alloy blisk and belongs to the technical field of high-temperature alloy connection. The blisk body is made of powder high-temperature alloy, a blade ring of the blisk is made of casting high-temperature alloy. The chemical component, granularity composition and purity of the high-temperate alloy powder used in the intermediate layer are identical with those of the blisk body. Good flowability of the high-temperate alloy powder and the fact that the high-temperate alloy powder is identical with the blisk body in terms of organization and performance after hot isostatic pressing are utilized to realize reliable diffusion bonding of the blade ring and the blisk body. Compared with the prior art, the method has the advantages that difficulty of different high-temperature alloy blisk hot isostatic pressing diffusion bonding is lowered, and quality of diffusion bonding joints is increased.

The invention discloses a titanium carbide ceramic-enhanced visible arc self-shielded flux-cored wire for high-chromium cast iron, and the flux-cored wire provided by the invention comprises the following chemical components in percentage by weight (wt%): 60 to 70% of high-carbon ferrochrome, 1 to 2% of high-carbon ferromanganese, 1 to 3% of ferrosilicon, 1 to 3% of ferrovanadium, 1 to 3% of ferromolybdenum, 2 to 8% of TiC, 15 to 25% of graphite, and 1 to 2% of aluminum/magnesium powders; and the flux-cored wire has a low-carbon steel strip serving as an outer wrapper. The flux-cored wire is made by use of flux-cored wire production equipment which has a flux powder filling rate of 37%to 45%, and drawn by a wire drawing machine 2 to 5 times until the outside diameter of the flux-cored wire reaches the level F4. The flux-cored wire disclosed by the invention can be applied to overlay-welding under the conditions of no preheating before welding and no heat treatment after welding, and is very convenient in on-site use. By virtue of overlay-welding using the flux-cored wire disclosed by the invention, deposited metals have a high hardness up to HRC63-67 and better wear resistance andare not liable to stripping, and the service lives of large-sized high-chromium cast iron wear-resistant parts are 2 to 4 times those of integrally-machined parts.

The invention discloses super-thick X70 pipeline steel and a manufacturing method thereof, wherein the pipeline steel is 30-32mm thick, and the pipeline steel comprises the following chemical ingredients in percentage by mass: 0.03-0.06% of C, 0.1-0.30% of Si, 1.30-1.60% of Mn, less than or equal to 0.010% of P, less than or equal to 0.0050% of S, 0.030-0.050% of Nb, 0.008-0.020% of Ti, 0.10-0.30% of Ni, 0.l0-0.30% of Cr, 0.10-0.30% of Cu and the balance being Fe and inevitable impurity elements. smelting raw materials are sequentially subjected to KR molten iron pretreatment, converter smelting, LF refining and RH vacuum degassing to obtain molten steel which is relatively high in purity, and then the pipeline steel, which is high in thickness, high in strength, narrow in strength interval, excellent in low-temperature toughness, and excellent in both low-temperature resistant aging performance and HIC resistance, is obtained through a controlled rolling and controlled cooling process.

The invention discloses a method capable of improving the quality of a large-section peritectic steel continuous casting billet. The method comprises control over the following processing steps that (1) the chemical ingredients of low-alloy peritectic steel are optimized; (2), after VD treatment, a fed calcium line is controlled to perform final deoxidation and inclusion modification treatment, and soft blowing is performed before casting; (3), full package operation is adopted for a tundish, the tonnage is controlled, and low-liquid-level casting is avoided; (4), the superheat degree of the tundish is controlled in the continuous-casting throwing process, and meanwhile the temperature difference of molten steel between two furnaces is controlled; (5), the fed-water temperature of a crystallizer and the temperature difference between fed water and discharged water are controlled, meanwhile, the narrow edge taper of the crystallizer is increased, and the shrinkage quantity of the peritectic steel is compensated; (6), casting powder special for the peritectic steel is selected, wherein the casting powder is high in alkalinity, low in viscosity and high in melting rate; (7), after thecontinuous casting billet is controlled to enter a secondary cooling zone by 12 meters, electromagnetic stirring is applied, and meanwhile the secondary cooling water amount is lowered. The surface quality and the internal quality of the large-section peritectic steel continuous casting billet cast through the method are both improved to a great extent.

The invention discloses a method for primarily transforming a saline and alkaline land by adopting an engineering-chemical-desalination water saving technology. The method comprises the following steps: S1, reducing salt content of soil in the saline and alkaline land to be processed step by step by engineering measures and isolating and discharging soluble salt in the soil; S2, reasonably utilizing water sources of the saline and alkaline land to be processed by utilizing a brackish water desalination technology; S3, reasonably irrigating the saline and alkaline land to be processed by utilizing a water-saving irrigation technology; S4, improving chemical ingredients of the saline and alkaline land to be processed by utilizing chemical measures. The method can carry out primary improving work on the saline and alkaline land in coastal areas and has short time and good effects.

The invention provides a method for electric-arc additive manufacturing of an aluminum alloy multi-layer single-pass closed structural member. The method includes the following steps that an aluminum alloy metal wire is used as a forming material, and a welding electric arc is used as a heat source to melt the aluminum alloy metal wire; and a welding device is driven by a driver to move in a predetermined forming path to form a layer of single-pass closed piece on a base plate in an accumulating mode, then the welding device is lifted by a predetermined height for accumulation of the next layer, and the aluminum alloy multi-layer single-pass closed structural member is formed by repeating the action. The predetermined forming path is a closed loop which is provided with at least two arcing points, and every two adjacent accumulated layers are different in arcing point and opposite in direction. According to the method, equipment is simple, the material utilization rate can reach 100%, the production cost is lowered, and the production cycle is shortened; and a formed part is composed of all-weld metal, and is high in density, good in metallurgical bonding performance and uniform in chemical ingredient, and the mechanical property of the formed part can reach or exceed that of a same-ingredient casting.

The invention provides an inclusion control method of an Si-Mn-killed non-oriented silicon steel, and belongs to the technical field of steel smelting. The non-oriented silicon steel comprises the following chemical components: not greater than 0.005% of C, 0.4-1.0% of Si, 0.20-0.80% of Mn, not greater than 0.04% of P, not greater than 0.005% of S, not greater than 0.005% of Als, and the balance Fe and inevitable impurities. The method comprises the processes of smelting through a converter, refining under RH and vacuum, and continuously casting; the slag amount of the steel from the converteris strictly controlled; lime, synthetic slag and calcium carbide are added to adjust the slag; the refining under HR and vacuum is that a deep decarbonization mode is carried out; after decarbonization, metallic aluminum is added to realize preliminary dexidation, and SiC is added to the ladle slag surface at the same time in order to deoxidize and modify the slag; the operation is circulated for1-3min; then low-carbon low-titanium ferrosilicon is added to realize Low carbon, low titanium ferrosilicon; the operation is circulated for 3-6min, then manganese metal, ferrophosphorus and the likeare added to alloy, and the net circulating time is beyond 8min after alloying. With the adoption of the method, the composition of nonmetal inclusions in the steel can be improved, so that the performances of the non-oriented silicon steel can be improved, and the foundation is supplied to develop high-performance non-oriented silicon steels.

The invention relates to a method for extracting cinnamon oil from dry branches and leaves of cinnamon. By the method, the extraction time can be shortened, oil yield can be improved, energy consumption can be reduced, and the production cost can be reduced. according to the method, a surfactant is used as a leaching adjuvant in a water vapor distillation method, the water-wetting of surfaces of the branches and leaves of the cinnamon is accelerated under the action of wetting, permeation and solubilization of the surfactant, and the water permeates through plant cells, so that essential oil inside the plant cells is carried away from the cells; and the essential oil is subjected to exchange by heat energy in a system, so that the essential oil is azeotropic with water vapor to be distilled with the water vapor, and the distilled essential oil is condensed, cooled and subjected to centrifugal sedimentation to obtain the cinnamon oil. According to the method, the distillation time is short, so the change of heat sensitive chemical ingredients in the essential oil due to long-term heating is avoided, and the influence on aroma of the essential oil due to the coking of plant raw materials caused by overheating is also avoided. The cinnamon oil is light in color and pure in aroma, and does not have the smell of scorching.

The invention provides high-damp-heat-resistant marine atmosphere high-strength weathering-resistant steel and belongs to the technical field of weathering-resistant steel. The weathering resistant steel comprises chemical ingredients of, in percentage by weight, 0.01-0.03 wt% of C, 0.30-0.50 wt% of Si, less than or equal to 0.01 wt% of P, less than or equal to 0.007 wt% of S, 0.30-0.50 wt% of Mn, 0.80-1.00 wt% of Cu, 2.90-3.10 wt% of Ni, 0.10-0.30 wt% of Mo, 0.20-0.30 wt% of Sn, 0.05-0.10 wt% of Sb, 0.40-0.60 wt% of Cr, less than or equal to 0.02 wt% of Nb, 0.01-0.03% of RE and the balance Fe and other inevitable impurity elements. Ultra-low carbon is adopted for ingredient design, the Sn, Sb and RE corrosion-inhibition alloy elements are added on the basis of a Cu-Ni-Cr-Mo alloy system in a compounded manner, and a great number of thin and small needle-shaped ferrite tissues are obtained supplemented by the microalloyed element Nb. The high-damp-heat-resistant marine atmosphere high-strength weathering resistant steel has the advantages that the steel has excellent weathering resistance and is particularly resistant to the high-damp-heat-resistant marine atmosphere environment, and corrosion resistance of the steel is increased by about three times that of plain carbon steel Q345 and is increased by about two times that of traditional weathering resistant steel Q450NQR1; and meanwhile, the steel has strength of 700 MPa level, the yield strength ratio is less than or equal to 0.80, and the extension rate is larger than or equal to 15%.

The invention relates to a brazed aluminum alloy foil with high strength and high corrosion resistance and a manufacturing method thereof. The brazed aluminum alloy foil comprises the following chemical ingredients in percentage by weight: 1.00-1.80 percent of Mn, 0.40-1.20 percent of Si, 0.50-1.30 percent of Fe, 0.10-0.50 percent of V, 0.05-0.25 percent of Cr, 0.06-0.25 percent of Zr, 0.08-0.30 percent of Ti, less than 0.03 percent of Cu, other added metals, and the balance of Al and unavoidable impurities. The ingredient alloys have high strength, high corrosion resistance and favorable shaping property; according to an ASTMG85-A3 standard, the brazed aluminum alloy foil with the thickness of 0.08mm, rolled by the alloys, has the penetration resistance time of over 15 days under the test , the corrosion resistance of three times of that of a 3003 alloy, and the tensile strength improved more than 15 percent under the same state.

The invention discloses an easily-weldable tempered high-strength ductile steel plate used in hydroelectric projects, and further relates to a production method of the steel plate. The easily-weldable tempered high-strength ductile steel plate used in hydroelectric projects comprises the following chemical ingredients in percentage by weight: 0.11-0.14% of carbon, 0.15-0.25% of silicon, 1.05-1.45% of manganese, not more than 0.010% of phosphorus, not more than 0.005% of sulfur, 0.40-0.50% of nickel, 0.40-0.50% of chromium, 0.35-0.40% of molybdenum, 0.02-0.04% of niobium, 0.030-0.050% of vanadium, 0.015-0.025% of titanium, 0.020-0.040% of aluminum, and the balance of iron and trace inevitable impurities. The production method of the steel plate comprises the steps of electrosmelting, F/VD refining, continuous casting, steel billet heating, rolling, thermal stacking, and heat treatment to obtain a finished product. The easily-weldable tempered high-strength ductile steel plate used in hydroelectric projects, disclosed by the invention, has a maximum thickness of 120mm, and has the characteristics of low cost, high strength, good low-temperature impact ductility, and good ductility, cold bending property and weldability.

The invention discloses a method for synthesizing polymer Janus particles with chemical and topological anisotropic properties. The synthesis method means subjecting hydrophobic monomers and hydrophilic monomers to a copolymerization reaction at an oil-water interface by an interfacial polymerization method, thereby obtaining the polymer Janus particles with chemical and topological anisotropic properties. The polymer Janus particles synthesized by the method simultaneously have chemical and topological anisotropic properties, chemical ingredients can be randomly regulated, and surfaces of the polymer Janus particles can be modified again; and meanwhile, a topological structure is adjustable, and thus, the synthesis of anisotropic polymer Janus particles of a variety of morphological structures can be achieved. The method disclosed by the invention is simple in synthesis process, easy in control of experimental conditions and easy and feasible in aftertreatment method and has a certain industrialized application value.

The invention discloses a hot-forming component with the tensile strength being above 1800MPa grade and an excellent cold bending performance, and a preparation method thereof. The hot-forming component is prepared from the following chemical components in percentage by weight: 0.29 to 0.35 percent of C, less than or equal to 0.5 percent of Si, 0.5 to 1.5 percent of Mn, less than or equal to 0.020percent of P, less than or equal to 0.010 percent of S, less than or equal to 0.50 percent of Cr, 0.01 to 0.06 percent of Al, 0.01 to 0.06 percent of Nb, 0.01 to 0.06 percent of V, less than or equalto 0.5 percent of Mo, and the balance Fe and inevitable impurities. A surface layer of the hot-forming component is a soft-phase ferritic structure, an inner layer of the hot-forming component is a martensitic structure, and the grain size is less than or equal to 10 mum. By adopting the component designs with low Si, low Mn, low Cr, zero Ti, zero B, and Mo, and combining thermal mechanical control processing (TMCP), continuous annealing and hot forming processes, the high-toughness hot-forming steel with the tensile strength being larger than or equal to1800MPa grade and well-closed formation is obtained; and in the preparation process, through the control of a preparation technology, a decarburized layer with the thickness ranging from 15 to 25 mum is obtained after hot rolling, so thatthe cold bending performance of the hot-forming component is improved.

The invention relates to water-tolerant and mould-proof putty powder for an internal wall and a use method of the water-tolerant and mould-proof putty powder. The water-tolerant and mould-proof putty powder for the internal wall is prepared from, by weight, 100-200 parts of Albo white cement, 200-300 parts of ash calcium, 3-8 parts of mildew preventive, 3-8 parts of cellulose, 15-30 parts of Wacker rubber powder, 600-800 parts of coarse whiting, 1-5 parts of antifoaming agent, 1-5 parts of starch ether, 1-5 parts of retarder and 5-10 parts of lubricant. The water-tolerant and mould-proof putty powder for the internal wall has good filling and leveling performance and impermeability, the water tolerating and alkali resisting performance is good and exceeds the national standard, environment friendliness is achieved, no pollutional chemical ingredient exists, the performance is stable, no harm is caused to the human body after the water-tolerant and mould-proof powder is solid and dry, meanwhile, the growth and development of mould can be restrained, the high sterilization and mould preventing function is achieved, and the putty powder is especially used for coating damp faces of bathrooms, basements and the like.

The invention relates to a steel forging with an ultra-high strength and an ultra-high low-temperature impact on the box body of a fracturing pump valve and a manufacturing method of the steel forging. The steel forging is used for solving the technical problems of low mechanical performance, bad corrosion resistance, short service life, and high cost of the existing steel materials. The steel forging comprises the following chemical ingredients in percentage by weight: 0.25-0.3% of C, 0.15-0.35% of Si, 0.6-0.9% of Mn, 1.8-2.2% of Cr, 4.05-4.25% of Ni, 0.46-0.6% of Mo, 0.12-0.18% of V, not greater than 0.01% of P, not greater than 0.01% of S, not greater than 0.12% of Nb, not greater than 0.12% of Re, not greater than 0.2% of Cu, not greater than 0.00016% of H, not greater than 0.0035% of O, not greater than 0.0065% of N, and the balance of Fe and inevitable impurities. The steel forging disclosed by the invention can be used in the fields of petroleum exploitation and shale gas exploitation.

The invention discloses a gas protection solid welding wire for 1000 MPa high-strength steel welding and preparing and welding methods of the gas protection solid welding wire. Chemical ingredients of the welding wire include, by weight, 0.07-0.13 part of C, 0.3-0.5 part of Si, 1.8-2.3 parts of Mn, 2.7-3.2 parts of Ni, 0.3-1.2 parts of Cr, 0.4-0.85 part of Mo, 0.01-0.1 part of Ti, 0.01-0.03 part of Al, 0.008 part or below of P, 0.005-0.010 part of S, 0.3 part or below of Cu, 0.01-0.035 part of Nb and the balance Fe. The welding wire can replace an imported welding wire, the construction cost of high-strength steel for large hydropower stations, water pumping and energy storage power stations and the like can be remarkably reduced, and remarkable economic benefits and social benefits are achieved.