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8results about How to "Reduce edge cracking" patented technology
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Preparation method of beryllium-copper alloy material with high beryllium content
The invention provides a preparation method of a beryllium-copper alloy material with high beryllium content, which comprises the following steps of: preparing metal raw materials containing pure copper and beryllium-copper master alloy, smelting to obtain alloy liquid, casting the alloy liquid to obtain a cast ingot, homogenizing the cast ingot to obtain a homogenized casting blank, and hot-rolling the homogenized casting blank to obtain a hot-rolled blank, the preparation method comprises the following steps: carrying out hot rolling on an alloy strip, carrying out hot rolling on the alloy strip to obtain a hot-rolled blank, carrying out annealing treatment on the hot-rolled blank to obtain an annealed blank, carrying out a circulating cold rolling-intermediate annealing process on the annealed blank, and finally carrying out finish rolling and finished product annealing treatment on the alloy strip to prepare the high-beryllium-content beryllium-copper alloy material. And machining passes are many.
Owner:CENT SOUTH UNIV
Method for reducing rolling edge crack and strip breakage incidence rate of high-grade non-oriented silicon steel
PendingCN119571181AImprove plasticityImprove mechanical propertiesMetal rolling arrangementsStrip steelSteelmaking continuous casting
The invention relates to a method for reducing the occurrence rate of rolling edge cracks and strip breakage of high-grade non-oriented silicon steel. The high-grade non-oriented silicon steel comprises the following chemical components in percentage by weight: 0.010%-0.030% of C, 2.0%-3.4% of Si, 0.5%-1.1% of Al, 0.1%-0.6% of Mn, 0.008%-0.012% of P, 0.0005%-0.0010% of S, 0.0005%-0.0030% of N, 0.04%-0.06% of Sn, 0.0050%-0.0075% of Sb (selectively added), less than or equal to 0.004% of Ti and the balance of Fe and impurities. The production process comprises the procedures of ironmaking, steelmaking, continuous casting, hot rolling, normalizing, cold rolling and annealing, wherein the natural aging time after normalizing can be controlled to be less than or equal to 72 hours. According to the method, the Sb element is added into the high-grade non-oriented silicon steel and / or the natural aging time after normalizing is controlled, so that the probability of edge cracking and strip breakage of the strip steel during cold rolling is effectively reduced, and the cold rolling yield is increased.
Owner:ANSTEEL BEIJING RES INST CO LTD
Preparation method of high-beryllium-content beryllium-copper alloy material
The application provides a preparation method of a high-beryllium-content beryllium copper alloy material, which comprises the following steps: melting metal raw materials containing pure copper and a beryllium copper master alloy to obtain an alloy liquid, casting the alloy liquid to obtain an ingot, uniformly treating the ingot to obtain a homogenized casting blank, hot-rolling the homogenized casting blank to obtain a hot-rolled blank, annealing the hot-rolled blank to obtain an annealed blank, performing a cyclic "cold rolling-intermediate annealing" process on the annealed blank, and finally performing finish rolling and product annealing on the alloy strip to prepare the high-beryllium-content beryllium copper alloy material. The method can solve the problems of the second phase component of the high-beryllium-content strip being inconsistent, the strip being cracked, side-bent and wrinkled, and a large number of processing passes in the prior art.
Owner:CENT SOUTH UNIV
Curtain upper beam
ActiveCN224187464UEasy to installEasy to disassembleLight protection screensMechanical engineeringPhysics
Owner:ZHEJIANG YIANO SHADING TECH CO LTD
Combined die for producing large-specification silver-copper alloy strip blank
ActiveCN224128253UUniform fluidityevenly distributedExtrusion diesUltimate tensile strengthMechanical engineering
The utility model relates to the technical field of silver-copper alloy strip billet production, in particular to a combined die for large-specification silver-copper alloy strip billet production, which comprises a divergent die and a forming die which are arranged in an extruder cavity, the divergent die is arranged at the outlet end of an extrusion cavity of an extruder, and the forming die is positioned on one side, far away from the outlet end of the extrusion cavity of the extruder, of the divergent die. An expansion cavity is formed in the divergent die, and a sizing belt is arranged on the forming die. The internal structure of a strip blank produced by an existing mold is not compact enough, and product strength and stability are affected. According to the utility model, the trapezoidal shunting block of the shunting die is matched with the shunting groove and the sizing belt of the forming die, so that alloy raw materials flow in the die more smoothly and are uniformly distributed. In the uniform flowing and distribution process, the alloy raw materials can be more tightly combined together, so that the compactness of the internal structure of the strip blank is improved, the strength and stability of the product are enhanced, the product quality can meet the standard requirement more easily, the production cost is reduced, smooth production is guaranteed, and the production efficiency is improved.
Owner:JINCHANG NICKEL CITY MINING IND CO LTD +1
A local forming manufacturing method of a high-temperature alloy GH738 turbine disc
ActiveCN115921734Bsmall loadReduce forming loadMetal-working apparatusWheelsSolution treatmentHot working
The present application relates to the field of hot working forging technology of high-temperature alloy in manufacturing industry, and particularly relates to a local forming manufacturing method of high-temperature alloy GH738 turbine disc. First, the high-temperature alloy GH738 cylindrical blank is heated and kept warm, then soft sleeve and hard sleeve are sequentially performed, and the blank with the sleeve is placed in an electric furnace for heating and keeping warm; after the blank is completely heated, upsetting process, arc anvil local rotary forging forming and rectangular anvil local rotary forging forming are sequentially performed to obtain a forged piece; finally, the forged piece is subjected to solid solution treatment, stabilization treatment and aging treatment in sequence to complete the local forming of the high-temperature alloy GH738 turbine disc, and a forged piece with uniform structure and good performance is obtained.
Owner:SHANGHAI JIAOTONG UNIV +1
Device and method for suppressing edge cracking during rolling of magnesium alloy sheet and strip using symmetrically arranged rolls
ActiveCN118023289BSuppress rolling edge cracksLow energy consumption of rolling technologyMg alloysRoll forming
This invention relates to an apparatus and method for suppressing edge cracking during the rolling of magnesium alloy sheet and strip using symmetrically arranged rolls, belonging to the technical field of magnesium alloy sheet and strip rolling forming. The apparatus of this invention includes two pairs of rolls, an external frame, and a control console. It has the advantages of optimized structure, simple parts, simple manufacturing process, and low manufacturing cost. Simultaneously, it can reduce energy consumption in magnesium alloy sheet and strip rolling technology, improve production efficiency, suppress edge cracking, improve room temperature forming performance of rolled magnesium alloy sheet and strip, and expand the application range of magnesium alloys. Furthermore, this invention also discloses a method for suppressing edge cracking during the rolling of magnesium alloy sheet and strip using symmetrically arranged rolls. The required temperature during the rolling process is lower than that of traditional rolling processes, significantly reducing production energy consumption, saving production costs, improving production efficiency, suppressing edge cracking, and resulting in magnesium alloy sheet and strip with superior room temperature forming properties.
Owner:CHONGQING UNIV
High-nitrogen austenitic stainless steel and preparation method thereof
PendingCN119506535Areduce precipitationReduce surface cracksRoll mill control devicesMetal rolling arrangementsTemperature curveDie casting
The invention discloses high-nitrogen austenitic stainless steel and a preparation method thereof, and the preparation method comprises the following steps: (1) smelting and die casting raw materials to obtain a stainless steel cast ingot; (2) performing heat treatment on the stainless steel cast ingot, wherein the heat treatment is performed according to a preset temperature curve; (3) pre-deforming the stainless steel cast ingot subjected to heat treatment to obtain a pre-deformed blank; (4) carrying out hot working on the pre-deformed blank to obtain a stainless steel plate; and (5) the stainless steel plate is subjected to aftertreatment, and the high-nitrogen austenitic stainless steel is obtained. By implementing the method, hot working cracks can be avoided, and the prepared high-nitrogen austenitic stainless steel has good size uniformity and mechanical property.
Owner:WELL TECHNOLOGY COMPANY LIMITED