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239results about How to "Improve plasticity" patented technology

Method for manufacturing large cake forgings of high-carbon and high-chromium cold working die steel

The invention discloses a method for manufacturing large cake forgings of high-carbon and high-chromium cold working die steel. The method is characterized by comprising the following steps of: obtaining Cr12MoV or Cr12Mo1V1 steel by adopting primary smelting with an electric furnace, ladle refining and vacuum degassing process smelting; pouring the tapped steel to form a 6 to 9t octangular ingot; conveying the octangular ingot to a press at the temperature of more than or equal to 300 DEG C, forging the octangular ingot to a blank with the diameter of 300 to 700 millimeters, removing surface defects by annealing, polishing or turning and local grinding, performing cold saw cutting on the end face and blanking to form a cake blank; and heating the cake blank to the temperature of between 1,150 and 1,190 DEG C, upsetting and forging the cake blank by using the press, annealing and turning, and thus obtaining the large cake forgings of the high-carbon and high-chromium cold working die steel. By adopting the method, the yield is improved to 40 to 60 percent; and the manufactured large cake forgings of the high-carbon and high-chromium cold working die steel can comprehensively meet the requirements of hardness, impact toughness and the like and ultrasonic flaw detection quality.
Owner:PANGANG GROUP JIANGYOU CHANGCHENG SPECIAL STEEL

Restrained induction heating electromagnetic riveting device and method

InactiveCN104815941AImprove plasticityImprove heating efficiencyInduction heaterPower flow
The invention relates to a restrained induction heating electromagnetic riveting device, comprising a restrained induction heater for quickly heating a rivet head to be formed, wherein the restrained induction heater comprises an induction heating coil connected with a high-frequency current generating power supply, and a plurality of ferrites for restraining a magnetic field are annularly arranged on the induction heating coil; the restrained induction heater also comprises a silicon steel sheet arranged on the outer sides of the induction heating coil and the ferrites for shielding the leaked magnetic field, the restrained induction heater sleeves the tail end of the amplifier of an electromagnetic riveter and is fixedly connected with the shell of the electromagnetic riveter by a support frame, the amplifier moves with respect to the restrained induction heater to form a heated rivet head to be formed; the invention also relates to restrained induction heating electromagnetic riveting method. According to the restrained induction heating electromagnetic riveting device, the rivet is quickly heated by the restrained magnetic field, and meanwhile a composite board is not damaged; the restrained induction heater is reasonably combined with the electromagnetic riveter, so that the restrained induction heating electromagnetic riveting device is high in forming efficiency, simple in technology and applicable to the structure with poor openness.
Owner:FUZHOU UNIVERSITY

High-toughness casting aluminum-silicon alloy, as well as preparation method and application thereof

ActiveCN109338180AHigh strengthImprove plasticitySilicon alloyCrystal
The invention provides a high-toughness casting aluminum-silicon alloy, as well as a preparation method and application thereof. The aluminum-silicon alloy is prepared from the following components inpercentage by mass: 7 to 8 percent of Si, 0.4 to 0.5 percent of Mg, 0.1 to 0.2 percent of Fe, 0.1 to 0.2 percent of Ti, 0.01 to 0.02 percent of Sr, 0.03 to 0.06 percent of La, 0.02 to 0.04 percent ofCe, and the balance Al and inevitable impurity elements. The preparation method comprises the steps of smelting for preparing aluminum-silicon alloy liquid, thinning for modification, refining for degassing and purifying, casting, and carrying out solid-solution aging treatment. According to the high-toughness casting aluminum-silicon alloy, as well as the preparation method and the application thereof provided by the invention, through optimizing the contents of Si and Mg elements, and thinning and modifying alpha-Al crystalline grains, a beta-Fe iron-rich phase and an eutectic Si phase, alpha-Al branch crystals are converted into fine equiaxed grains, the elongated and flaky beta-Fe iron-rich phase and the eutectic Si phase are converted into fine granulated shapes or short rod shapes,and the damage of the elongated and flaky beta-Fe iron-rich phase and the eutectic Si phase on the strength, the plasticity and the breaking tenacity of the aluminum-silicon alloy is eliminated. The casting aluminum-silicon alloy provided by the invention has high strength, good plasticity and excellent breaking tenacity, is suitable for casting various stress structural members such as automobilelight-weight structural members.
Owner:GUANGDONG INST OF NEW MATERIALS

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

Modified graphene based composite asphalt modifier and preparation method and application of modified graphene based composite asphalt modifier

ActiveCN108117714AImprove plasticityImprove elastic propertiesBuilding insulationsPotassium peroxodisulfateButadiene-styrene rubber
The invention discloses a modified graphene based composite asphalt modifier. The modified graphene based composite asphalt modifier is prepared from modified graphene and an SBS (Styrene Butadiene Styrene) modifier; the modified graphene is prepared by adding a styrene monomer and lauryl sodium sulfate into an oxidized graphene microchip solution, conducting ultrasonic concussion on the obtainedmixed solution, adding potassium peroxodisulfate, reacting in an oil bath, then adding hydrazine hydrate, raising the temperature to 100 DEG C at the same time, reacting for 4-6 hours, cooling, filtering through a microfiltration membrane, washing and drying. The invention further discloses a preparation method and application of the modified graphene based composite asphalt modifier. The high-and-low temperature performance and the plastic property of the modified asphalt prepared by using the composite asphalt modifier are obviously improved, the anti-rutting performance and the elastic property are greatly improved, the defects of not high durability and not good high temperature property of the SBS modified asphalt are effectively improved, and compared with the graphene microchip notmodified, the dispersibility and the stability of the modified graphene microchip in the asphalt are greatly improved.
Owner:GUANGXI UNIV

Cr-B system low-carbon high-strength cold forging steel wire rod and manufacturing method thereof

The invention belongs to the technical field of cold forging steel and particularly relates to a Cr-B system low-carbon high-strength cold forging steel wire rod and a manufacturing method of the Cr-Bsystem low-carbon high-strength cold forging steel wire rod. The main chemical ingredients of the Cr-B system low-carbon high-strength cold forging steel wire rod comprise 0.16-0.24% of C, 0.55-0.90%of Cr, 0.032-0.065% of Ti, 0.0020-0.0040% of B and not larger than 80ppm of N, wherein Ti/N is controlled to be larger than 4. The manufacturing method includes the procedures of converter smelting,LF refining, square billet continuous casting and wire rod rolling. According to the Cr-B system low-carbon high-strength cold forging steel wire rod and the manufacturing method of the Cr-B system low-carbon high-strength cold forging steel wire rod, by optimizing ingredient design of the elements of Cr, B, Ti, N and the like, the hardenability of the steel is effectively improved, the cold forging performance of the steel is improved, it is achieved that the low-carbon cold forging steel wire rod can be used for producing 12.9-grade high-strength fastener without annealing, and the machiningcost of producing high-strength fasteners for a downstream industry is significantly lowered.
Owner:ZENITH STEEL GROUP CORP

Good plasticity mold core molding sand and preparation method thereof

The invention relates to good plasticity mold core molding sand, which is prepared from the following raw materials by weight: 20-30 parts of chromite sand, 10-14 parts of bauxite, 15-20 parts of brown corundum powder, 6-8 parts of alpha-Al2O3 micro-powder, 2-3 parts of sodium tripolyphosphate, 1-2 parts of dimethyl silicon oil, 4-5 parts of a furan resin, 14-18 parts of poly carbosilane powder, 220-240 parts of clay, 2-3 parts of fatty acid sodium, 4-5 parts of potassium methyl silicate, a proper amount of water, and 20-30 parts of an auxiliary agent. According to the good plasticity mold core molding sand, the clay is used, such that the matching cost is low, the chilling effect is good, and the gas permeability is good; the alpha-Al2O3 micro-powder is added, such that the plasticity is good, the thermal conductivity is good, the molding sand is suitable for mold core manufacturing, and the cast hole shrinkage and dispersed shrinkage solving effect can achieve more than 90, and the cast yield can be increased; the auxiliary agent of the present invention adopts alumina and other high temperature resistance materials, such that the auxiliary agent can not melt during casting, the adhesion of the clay particles can be prevented, and the recycling is easily performed; and the clay is wrapped on the surface, and the binding force with the clay particles is strong.
Owner:繁昌县琦祥铸造厂(普通合伙)

Warm-rolling process method of titanium alloy thin plate

ActiveCN102921731AImprove plasticityAvoid edge crackingMetal rolling arrangementsSlagAcid washing
The invention provides a warm-rolling process method of a titanium alloy thin plate and comprises the following steps: firstly, heating a titanium alloy thin plate with a certain thickness up to 300-400 DEG C; secondly, preheating a roller of a rolling mill to 30-60 DEG C; warm-rolling the heated titanium alloy plate for 1-3 turns, and obtaining the rolled slab; and thirdly, orderly performing the finished product annealing, acid washing and fixed-dimensional shearing, obtaining the titanium alloy thin plate with the thickness of 1.2-3 mm. In the invention, the titanium alloy plate is delivered to the preheated rolling mill after being heated within the temperature scale of lower than the recrystallization temperature, in order to perform the warm-rolling; compared with the cold-rolling process technique, the invention can slow down the hardening rate of the titanium alloy, improve the accumulated deformation rate of the rolling turn, reduce the intermediate heat treatment frequency, shorten the production cycle and improve the working efficiency; meanwhile, the method can effectively prevent edge crack, slag at head and tail parts and micro-crack, and improve the surface quality; the invention is easy to control, simple and convenient to operate and applicable to the industrial production on a large scale.
Owner:WESTERN TITANIUM TECH

High-resistance electrophoretic aluminum profile being resistant to cracking caused by bending and preparation method of aluminum profile

The invention discloses a high-resistance electrophoretic aluminum profile being resistant to cracking caused by bending and a preparation method of the aluminum profile, and relates to the technicalfield of aluminum alloy materials. A substrate material of the aluminum profile comprises the following elements in percentage by weight: 0.46-0.55% of Si, 0.68-0.78% of Mg, 0.25-0.33% of Fe, 0.12-0.18% of Mo, 0.22-0.30% of Mn, no more than 0.05% of Cr, no more than 0 .05% of Cu, no more than 0.10% of Zn, and the balance Al and inevitable impurities, wherein the content of a single impurity is lower than or equal to 0.05%, the total content of the impurities is lower than or equal to 0.15%, and the ratio of Mg to Si in the substrate material is higher than or equal to 1.43 and lower than or equal to 1.60. The preparation method comprises the following steps: smelting, homogenization treatment, primary extrusion, secondary extrusion, aging treatment, anodic oxidation treatment and electrophoretic painting. Through the interaction among all the alloying elements, the aluminum profile disclosed by the invention is high in toughness and plasticity; during the preparation process, crystal grains become finer and more uniform through two extrusion forming operations, the strengthening effect is good, both the mechanical properties and the processing properties of such an alloy are obviously improved, and the possibility of cracking and other phenomena during the bending deformation processing process is low; and accordingly, the aluminum profile is resistant to cracking caused by bending and high in resistance.
Owner:ANHUI XIN FA ALUMINUM PROD
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