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83results about How to "Good comprehensive mechanical properties" patented technology

LPG boat storage tank steel plate and production method thereof

The invention discloses an LPG boat storage tank steel plate and a production method thereof. The steel plate comprises 0.05-0.12wt% of C, 0.30wt% or less of Si, 0.50-1.30wt% of Mn, 0.015wt% or less of P, 0.008wt% or less of S, 0.020-0.060wt% of Al, 0.15-1.20wt% of Cu, 0.20-1.50wt% of Ni, 0.35-1.00wt% of Cr, 0.20-0.60wt% of Mo, 0.008-0.020wt% of Ti, one or more of 0.0020-0.10wt% of Nb, 0.030-0.060wt% of V and 0.0005-0.0020wt% of B, and the balance Fe and inevitable impurities. The method comprises the steps of molten iron advanced desulphurization, converter top and bottom blowing, vacuum treatment, continuous casting, casting blank heating, rolling and heat treatment, the heating temperature of a casting blank is 1170-1250DEG C, and the heating rate of the casting blank is not less than 8min/cm; the blooming temperature is 1050-1150DEG C, the finishing temperature is 850-940DEG C, and the accumulated reduction rate of last three passes is not less than 16%; and heat treatment adopts online quenching and tempering treatment, or adopts offline quenching and tempering treatment. The steel plate obtained in the invention has the advantages of excellent mechanical properties, good hot and cold processing performance, excellent weldability and low sensitivity of weld cracks.
Owner:武汉钢铁有限公司

Preparation of seamless special-shaped steel pipe for low temperature resistance oil derrick electric transmission pole tower

The invention relates to a manufacturing method of a seamless special steel pipe used in a low temperature tolerant petroleum derrick power transmission tower and is made of integral seamless steel pipe round pipe billet by adopting annealing heat treatment, process of setting and cold drawing and process of heat treatment of products; wherein, weight ratios of each chemical element of materials are as follows: C accounts for 0.15 to 0.18 percent, Mn accounts for 1.4 to 1.6 percent, Si accounts for 0.2 to 0.5 percent and trace elements of V accounts for 0.02 to 0.06 percent, Nb accounts for 0.015 to 0.06 percent, Ti accounts for 0.02 to 0.06 percent and Al accounts for 0.02 to 0.05 percent and the left is Fe and unavoidable impurities. The specific processing steps are as follows: annealing heat treatment and air cooling with the temperature of 850 to 880 DEG C for 30 minutes; setting and cold drawing; the heat treatment of the products adopts quenching, injection water cooling and tempering and hardening heat treatment process with the quenching temperature of 900 to 930 DEG C for 20 to 30 minutes, and air cooling is adopted after the fast injection water cooling is done under 300 DEG C with the tempering temperature of 550 DEG C for 100 minutes. The seamless special shaped steel pipe prepared by the method is characterized by good low temperature performance, high strength and comprehensive mechanical properties and lower cost, etc.
Owner:江苏界达特异新材料股份有限公司

Preparations of bicomponent PSU type liquid rubber-based sealant and PSU liquid rubber thereof

The invention discloses a dual-component PSU-typed liquid rubber-based sealant and a preparation method of the PSU-typed liquid rubber, wherein, the sealant comprises a component A and a component B; the component A comprises PSU-typed liquid rubber, plasticizer, filling material, tackifier, antioxidant and vulcanization retarder; the component B comprises vulcanizing agent, vulcanization accelerator, plasticizer and filling material; and the component A and the component B are mixed together by normal method so as to prepare the finished product. The PSU-typed liquid rubber uses the mixture of polyether glycol and polyether-tribasic alcohol and polyisocyanate as raw materials to generate isocyanate-terminated polyurethane prepolymer under the action of acidic catalyst; furthermore, the isocyanate-terminated polyurethane prepolymer is terminated by sulfhydryl compounds to synthesize the sulfhydryl-terminated liquid rubber which takes the polyurethanes as main chain and has local crosslinking structure characteristic; the liquid rubber is taken as the basic rubber to prepare the sealant which has excellent mechanic performances and can be widely applied to the fields such as the construction of housing, plazas, roads, airports, bridges, hydraulic engineering, water conveyance project, sewage disposal engineering, and the like, the manufacture of automobiles, trains, containers, and the like, and the electric apparatuses, power, aeronautics and astronautics, and the like.
Owner:HENAN YONGLI CHEM

Method for manufacturing high-strength steel through hot rolling and on-line thermal treatment

ActiveCN104032109AGood comprehensive mechanical propertiesAlloy composition is simpleCarbon steelDuctility
The invention relates to a method for manufacturing high-strength steel through hot rolling and on-line thermal treatment and belongs to the field of thermal treatment of metal materials. The method is characterized by comprising the following steps: immediately carrying out online waste heat quenching treatment on a hot rolled plate after hot rolling finishing by using low- and medium-carbon steel containing 0.5-3.5wt% of Mn to obtain a complete martensite or a part of ferrite+martensite organization structure; then carrying out online heating to a two-phase region and preserving heat to obtain a great deal of austenite among battens; then, quickly cooling to a partition region and partitioning so as to stabilize the austenite; and finally, quickly cooling to room temperature. The room-temperature tissues of the hot rolled plate produced by the process comprise an alpha phase with a quenching martensite form, retained austenite among battens, lath martensite/retained austenite island tissues and a ferritic structure formed before quenching. The tensile strength of the complex structure containing the retained austenite among battens can reach 800-1350MPa, the ductility reaches 20-35% and the product of strength and elongation can reach over 30GPa.%.
Owner:UNIV OF SCI & TECH BEIJING

Casting magnesium alloy with high strength and toughness and preparation method thereof

ActiveCN102978497AGood comprehensive mechanical propertiesExcellent aging strengthening abilitySolution treatmentCrucible
The invention relates to the field of magnesium alloy of metal materials, and concretely relates to a casting magnesium alloy containing Zn, Al, Cu and Mn with high strength and toughness. The casting magnesium alloy comprises the following components in percentage by weight: 6.0-8.0% of Zn, 0.5-1.5% of Al, 0.5-1.0% of Cu, 0.3-0.7% of Mn and the balance of Mg and inevitable impurity elements, wherein the content of the impurity elements is less than 0.01%. A preparation method of the casting magnesium alloy comprises the steps of: smelting Mg at the temperature of 740-760 DEG C by using an iron crucible; after pure magnesium is completely smelted, sequentially adding preheated pure metal Zn, Al, Cu and Mg-10wt.% and Mg intermediate alloy for alloying, wherein mixed CO2 and SF6 are used as protective gases in the pure magnesium smelting and alloying processes; stirring, slagging off, standing for 15-20 minutes, adjusting the temperature of an alloy fusant to 700-720 DEG C, and casting into an ingot; and carrying out solution treatment on the alloy for 24-64 hours at 350-400 DEG C, quenching by warm water at 40-60 DEG C, then preageing for 8-24 hours at 50-70 DEG C, and finally preageing for 2-6 hours at 150-200 DEG C to obtain the casting magnesium alloy with high strength and toughness. In room temperature extension tests of the casting magnesium alloy, the yield strength is not less than 205MPa, the tensile strength is not less than 305MPa, the elongation rate is not less than 10%, and the casting magnesium alloy has excellent comprehensive mechanical property.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

2xxx series aluminum alloy with high strength and high plasticity and manufacturing method thereof

The invention provides a 2xxx series aluminum alloy with high strength and high plasticity and a manufacturing method thereof. The aluminum alloy of the invention comprises the following components: 3.8-4.6wt% of Cu, 1.32-1.56wt% of Mg, 0.5-0.7wt% of Mn, less than or equal to 0.15wt% of Ti, less than or equal to 0.25wt% of Zn, less than or equal to 0.10wt% of Cr, less than or equal to 0.2wt% of Si and less than or equal to 0.2wt% of Fe. The manufacturing method of the aluminum alloy of the invention comprises the following steps: firstly, adding an aluminum ingot into a resistance furnace; when the melt temperature is 740-760 DEG C, adding AlCu50, AlMn10 and AlCr5 intermediate alloys, and stirring; after the temperature falls to 720-730 DEG C, adding Mg and Zn, removing slag and refining; when the temperature is 730-740 DEG C, adding Al-5Ti-B, stirring and standing for 10-25 minutes and then casting and forming; homogenizing and annealing the cast ingot at 500 DEG C for 24h, and then, extruding the cast ingot at 400-490 DEG C; carrying out solid solution on the extruded material at 490-500 DEG C for 1-2 hours; and carrying out water quenching, and putting the material at room temperature to T4 state to obtain a board. By reasonably adjusting the contents of Cu and Mg in the aluminum alloy, the material has better comprehensive mechanical properties and is an ideal material for manufacturing aviation components.
Owner:苏州有色金属研究院有限公司

Method of preparing degradable Fe-Zn alloy pipe for intravascular stent by electroforming

ActiveCN102605390AGood comprehensive mechanical propertiesAvoid conventional pressure forming processStentsSurgeryIonMicrostructure
The invention discloses a method of preparing a degradable Fe-Zn alloy pipe for an intravascular stent by electroforming, belonging to the field of biological materials and electrochemical processing. The method is characterized in that a Fe-Zn alloy material is prepared by mutual-competition and codeposition processes of Fe ions and Zn ions, and the obtained alloy is fine in crystal grain and good in comprehensive mechanical performance; the thickness of an electroforming layer can be up to 7-150 microns, and the electroforming layer is served as an individual to be used independently after separating from a substrate, so that a seamless microcapillary pipe for a stent is directly obtained, and a regular pressure shaping procedure of a metal superfine pipe for laser-cutting of the stent is avoided; and a component ratio of a Fe-Zn alloy is changed by regulation of electroforming parameters, thermal treatment changes a microstructure of the Fe-Zn alloy, and the synergistic effect of both sides can regulate the degrading speed of the Fe-Zn alloy material in human body fluid or blood and improve the mechanical performance of the Fe-Zn alloy material. Therefore, according to the method provided by the invention, the Fe-Zn alloy pipe for the intravascular stent, with good biocompatibility, biological corrosion degradation performance and comprehensive mechanical performance is prepared.
Owner:DALIAN UNIV OF TECH

Lifting belt-type suspender for horizontal hoisting

ActiveCN104261242AHigh-strength comprehensive mechanical propertiesGood comprehensive mechanical propertiesLoad-engaging elementsMechanical engineeringCentroid
The invention discloses a lifting belt-type suspender for horizontal hoisting and belongs to mechanical hoisting equipment. The lifting belt-type suspender solves the problem that the existing horizontal hoisting suspender has a limited adjustment or use range, low efficiency and poor universality. The lifting belt-type suspender comprises a hanging beam, lifting belts, front and rear rotating shaft assemblies and an overturn support. The two lifting belts are hung under left and right ends of the hanging beam. One end of each one of the two lifting belts is connected to the front rotating shaft assembly and the other end of each one of the two lifting belts is connected to the rear rotating shaft assembly. The front rotating shaft assemblies and the two rear rotating shaft assemblies are connected to the overturn support. The overturn support comprises four tripods. The lifting belt-type suspender has a simple structure, good versatility, high strength and good integrated mechanical properties. All the parts of the lifting belt-type suspender can be detachably connected so that manufacture and maintenance are simple and manufacturability is good. The lifting belt-type suspender can be used for horizontal hoisting of cabins having different quality, centroids and sizes and realize change of a static displacement state of the cabins under support action of the overturn support.
Owner:航天科工火箭技术有限公司

Cast rolling H-shaped steel cooling device

The invention provides a cast rolling H-shaped steel section cooling device. The cast rolling H-shaped steel section cooling device comprises a shell, three sets of upper spraying nozzles, an upper spraying pipe, three sets of lower spraying nozzles, a lower spraying pipe, three sets of left spraying nozzles, a left spraying pipe, three sets of right spraying nozzles and a right spraying pipe. The shell is of a box-shaped structure, the three sets of upper spraying nozzles are arranged in the shell and are used for being respectively aligned with two R portions of the upper side of the H-shaped steel section and the center of a web perpendicularly, the upper spraying pipe is arranged in the shell and is connected with the three sets of the upper spraying nozzle, the lower spraying pipe is arranged in the shell and is connected with the three sets of the lower spraying nozzles, the three sets of the left spraying nozzles are arranged in the shell and are sequentially arranged from top to bottom and are used for being aligned to the left side face of the H steel section to enable cooling water to be evenly sprayed to the left side face of the H steel section, the left spraying pipe is arranged in the shell and is connected with the three sets of left spraying nozzles, and the right spraying pipe is arranged in the shell and is connected with the three sets of right spraying nozzles. Cooling water sprayed by each set of spraying nozzles does not interfere with each other. The cast rolling H steel section cooling device enables the H steel section to be good in organization state, and therefore better comprehensive mechanical property is obtained.
Owner:LAIWU IRON & STEEL GRP

Twin induced plastic steel with high elongation percentage and high hole expansion rate and manufacture method thereof

The invention provided twin induced plastic steel with a high elongation percentage and a high hole expansion rate and a manufacture method thereof, the steel consists of 0.30 to 0.70 % of carbon, less than or equal to 1.0 % of silicon, 10 to 20% of manganese, less than or equal to 1.0 % of aluminum, 0.005 to 0.20% of polonium, 0.005 to 0.30% of Ra, 0.004 to 0.05% of nitrogen, less than or equal to 0.2% of niobium, less than or equal to 0.3 % of vanadium, less than or equal to 1 of copper and the balance of Fe. The method comprises the following steps of: (1) smelting: smelting by a vacuum furnace, allowing the molten steel to stand for 3-5 min, casting at a casting temperature of 1450-1550 DEG C; (2) hot rolling: heating the casting blank at a temperature of 1150 to 1200 DEG C, with a heating rate of 10-15 DEG C/min, performing heat preservation for 20 to 40 minutes, rolling at an initial rolling temperature of 1150-850 DEG C, stopping rolling at a finishing rolling temperature of 900-600 DEG C, rapidly cooling to room temperature at a rate of more than or equal to 20 DEG C /second after rolling; (3) cold rolling: performing cold rolling with a reduction ratio of the hot rolled plate being 40%-80% ; (4) heat treatment: performing heat treatment at a temperature of 600 to 1000 DEG C, rapidly cooling to room temperature at a rate of more than or equal to 20 DEG C /second after heat preservation for 3 to 10 minutes. The steel of the invention has low cost, a simple method, good quality of the product surface, an excellent processing property and an integrated mechanical property.
Owner:ANGANG STEEL CO LTD

Normalized extra-thick plate with high strength and toughness and thickness of 150mm and method for manufacturing normalized extra-thick plate

ActiveCN104962814AGood comprehensive mechanical propertiesLittle difference in mechanical propertiesSteel platesImpact toughness
The invention discloses a normalized extra-thick plate with high strength and toughness and the thickness of 150mm and a method for manufacturing the normalized extra-thick plate, and belongs to the field of technologies for manufacturing extra-thick plates. The method mainly includes controlling technological parameters in steps of molten steel smelting, plate slab casting, steel plate rolling, steel plate normalizing treatment, cooling and the like. The normalized extra-thick plate and the method have the advantages that reasonable composition systems and optimized 'control-rolling, normalizing and weak water cooling' technologies are designed, accordingly, the steel plate is excellent in comprehensive mechanical property and good in impact toughness at the temperatures of minus 40 DEG C and minus 60 DEG C, different positions of the steel plate in the thickness direction are low and stable in mechanical property difference, requirements of Q460-level extra-thick steel plates with the thicknesses of 150mm on the strength and the impact toughness can be completely met, and the normalized extra-thick plate and the method have excellent application prospects in the field of steel for engineering structures.
Owner:SHOUGANG JINGTANG IRON & STEEL CO LTD

Aluminum-based in-situ composite material formed based on laser 3D printing and preparation method of aluminum-based in-situ composite material

The invention belongs to the technical field of particle-reinforced aluminum-based in-situ composite materials and discloses an aluminum-based in-situ composite material formed based on laser 3D printing and a preparation method of the aluminum-based in-situ composite material. The preparation method includes the steps that a mixture of Al-Si-Mg alloy powder and Al2O3 powder is prepared; the mixture is ball-milled through an intermittent ball-milling process; a three-dimensional CAD model established through a workpiece is subjected to layered slicing treatment; laser beams are adopted for scanning the laid powder line by line to form a two-dimensional section of the workpiece; and the steps are repeated till the workpiece is machined, and the aluminum-based in-situ composite material with an Al2Si4O10 reinforced element scattered on an Al matrix is formed. The operation method is easy and convenient to carry out, Al-Si-Mg alloy and Al2O3 generate the Al2Si4O10 reinforced phase in situ under the effect of high-energy lasers in the laser forming process, the interface wettability is improved, and then the interface strength of the composite material is enhanced.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Thermostable polycrystalline diamond composite piece and preparation method thereof

InactiveCN105156037AGood comprehensive mechanical propertiesHigh wear resistance and thermal stabilityDrill bitsCoal miningCemented carbide
The invention discloses a thermostable polycrystalline diamond composite piece and a preparation method thereof. The thermostable polycrystalline diamond composite piece is prepared through the following steps of: coating a plastic layer on the surface of a hard alloy matrix of a polycrystalline diamond composite body compounded through high temperature and high pressure; and then immersing the coated polycrystalline diamond composite body into acid liquor so as to perform acid cooking. According to the thermostable polycrystalline diamond composite piece disclosed by the invention, the plastic layer is coated on the surface of the hard alloy matrix of the polycrystalline diamond composite body during preparing the thermostable polycrystalline diamond composite piece, and only the surface of a polycrystalline diamond layer is exposed into the acid liquor when the acid cooking is performed so as to prevent the hard alloy matrix and joints between the polycrystalline diamond layer and the hard alloy matrix from being damaged by the acid liquor. Compared with a conventional polycrystalline diamond composite piece, the thermostable polycrystalline diamond composite piece disclosed by the invention has excellent synthesized mechanical properties, particularly has high heat stability and a good abrasion resistant property, is suitable for the application fields of oil drilling, geological drilling, coal mining and the like, and has a high social value and high economic benefits.
Owner:FUNIK ULTRAHARD MATERIAL
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