7results about How to "Reduce deformation difference" patented technology

The invention relates to the technical field of titanium alloy machining, and particularly discloses a forging method for improving the macrostructure uniformity of a TC2 titanium alloy large-specification bar, which is realized through cogging forging, twice alpha + beta phase region remelting dynamic beta recrystallization forging, two-phase region upsetting and drawing forging and two-phase region drawing forging. The TC2 titanium alloy bar with the specification of phi 300-phi 400 mm prepared through the method is fine and uniform in macrostructure and meets the 1-5 grade of a macroscopic rating chart in the product standard, and the structure of a ring forge piece subjected to die forging through the bar is greatly improved and meets the standard requirement.

Embodiments of the present disclosure provide a redistribution layer structure. The redistribution layer structure includes a first metal layer, a first dielectric layer disposed on the first metal layer, a second metal layer disposed on the first dielectric layer, and a second dielectric layer disposed on the second metal layer. A coefficient of thermal expansion of the first dielectric layer is less than a coefficient of thermal expansion of the second dielectric layer.

The invention relates to the technical field of charged particle beam control, and discloses an electrostatic deflector for a focused ion beam and an assembly process thereof, the electrostatic deflector comprises an electrode assembly, a mounting flange, an insulation structure and a positioning structure; an upper electrode and a lower electrode of the electrode assembly are correspondingly arranged; part of the upper electrode is embedded into the mounting flange; the insulating structure is arranged on one side, far away from the upper electrode, of the mounting flange, and part of the lower electrode is embedded into the insulating structure; the positioning structure sleeves the lower electrode; the thermal expansion coefficient of the electrode assembly is A, the thermal expansion coefficient of the insulation structure is B, and 1 < = A / B < = 1.5. The proportional relation between the thermal expansion coefficients of the electrode assembly and the insulation structure is limited, the thermal expansion coefficients of the electrode assembly and the insulation structure are matched, the deformation quantity difference of the electrode assembly and the insulation structure under the extreme working condition is reduced, thermal stress cracking is avoided, and the assembly precision and structural integrity of the electrode assembly and the insulation structure are maintained; the electric field is distributed according to design, and distortion is avoided.

The invention relates to a physical vapor deposition method and a physical vapor deposition device, in particular to the technical field of physical vapor deposition, and the method comprises the steps that a deposition chamber is vacuumized, and then a workpiece to be treated is sequentially subjected to preheating operation, pre-deposition operation and deposition operation; wherein the flow of gas sprayed to the front surface of the workpiece is controlled to be greater than that of gas sprayed to the back surface of the workpiece in the deposition operation; and the ratio of the flow of the gas sprayed to the reverse side of the workpiece to the flow of the gas sprayed to the front side of the workpiece is (0.1-0.8): 1. According to the physical vapor deposition method provided by the invention, the temperature difference amplitude of the center and the edge of the workpiece in the physical vapor deposition process can be reduced by controlling the flow of the gas sprayed to the front surface and the back surface of the workpiece in the deposition operation process, so that the lattice size difference of the workpiece is improved, the lattice size uniformity is improved, and the product yield is ensured.

The present application provides a current collector, electrode plate, cell, battery, device, manufacturing method, and apparatus. The current collector includes a conductive layer and a support layer, wherein the conducive layer is provided on a surface of the support layer, and the support layer includes an insulating base and a support structure embedded in the insulating base to enhance strength of the support layer, which not only increases an overall strength of the current collector and can improve the problem of tape breakage during processing, but also allows strength of the support layer to be close to strength of the conductive layer, narrowing the gap in structural strength between the support layer and the conductive layer, and reducing the difference in deformation between the conductive layer and the support layer during processing, so that it is conducive to improving processing performance of the current collector.

The invention relates to the technical field of concrete, and particularly discloses concrete for a C50 prestressed fabricated box girder and a preparation method of the concrete. The concrete for the C50 prestressed fabricated box girder is prepared from the following raw materials in parts by weight: 400 parts of cement; 150 to 160 parts of water; 100 parts of mineral powder; 30 parts of fly ash; 600 to 700 parts of natural sand; 100 to 150 parts of stone chips; 500 to 600 parts of limestone; 400 to 500 parts of natural river stone; 3-4 parts of a composite water reducing agent; 7-8 parts of other additives; the composite water reducing agent is an esterification product of graphene oxide and PCE, and the other additives comprise a water-retaining agent and an air entraining agent; the preparation method comprises the following steps: mixing the raw materials, and uniformly stirring to obtain the concrete for the C50 prestressed fabricated box girder. The concrete provided by the invention has the advantages of excellent anti-pressure ability and good fluidity.

The invention discloses a construction method for preventing settlement of an underground drainage pipeline in a soft foundation. The construction method comprises the steps of trench excavation, replacement filling treatment on the bottom of the pipeline after excavation, pipeline route planning and measurement, settlement transition section construction, pipeline installation and trench backfilling. According to the novel construction method for preventing the underground drainage pipeline from settling in the soft foundation, the problem of uneven settlement of the underground drainage pipeline in the existing soft foundation is solved, the settlement difference of the foundations at adjacent parts is reduced, the deformation difference along the pipeline is reduced, the problem of tension fracture of the pipeline due to differential settlement is avoided, the welding seam strength of the pipeline can be enhanced, and the service life of the pipeline is prolonged. The inner plastic-coated layer at the welding seam is prevented from being damaged, the construction procedures are few, and the construction of the buried drainage pipeline in the soft foundation is facilitated.