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  • Common process measures and six operation methods to solve the processing deformation of aluminum parts

    Common process measures and six operation methods to solve the processing deformation of aluminum parts

    In other words, fixed point machining requires three points and one fixed point. There are many reasons for the deformation of common aluminum parts, which are related to the material, the shape of parts and the production conditions. There are several aspects: deformation caused by internal stress ...

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  • What is the reason of stainless steel rusting?

    What is the reason of stainless steel rusting?

    Introduction to stainless steel Generally speaking, stainless steel is not easy to rust steel, in fact, some stainless steel, both stainless steel and acid resistance (corrosion resistance). The rust resistance and corrosion resistance of stainless steel are due to the formation of chromium ...

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  • Shrinkage porosity of casting defects

    Shrinkage porosity of casting defects

    What is shrinkage porosity? Shrinkage porosity refers to that the final solidification area of the casting is not fed by liquid metal or alloy to form dispersed and small shrinkage cavity. Often scattered in casting The axis area of wall thickness, the thick part, the root of ri ...

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  • Metal 3D printing: main metal materials and application scenarios

    Metal 3D printing: main metal materials and application scenarios

    On November 5, 2020, at the invitation of Shanghai Institute of rules and regulations of China Classification Society (CCS), I had the honor to participate in the review meeting of the review draft of “additive manufacturing inspection guide”. During the meeting, we had face-to-fac ...

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  • Technical question and answer of heat exchanger

    Technical question and answer of heat exchanger

    What is a heat exchanger? Heat exchanger is a kind of energy-saving equipment which can realize heat transfer between two or more fluids at different temperatures. It can transfer heat from the fluid with higher temperature to the fluid with lower temperature, so that the fluid temperature can ...

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  • What is cemented carbide?

    What is cemented carbide?

    What is cemented carbide? Cemented carbide is a kind of alloy made by powder metallurgy with one or several kinds of refractory carbides (tungsten carbide, titanium carbide, etc.) as the main component and metal powder (cobalt, nickel, etc.) as adhesive. It is mainly used to manufacture high-s ...

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  • Stainless steel surface processing types and comparison table

    Stainless steel surface processing types and comparison table

    Stainless steel surface finish type Abbreviation Processing type Surface state NO.1 Hot rolling, heat treatment, pickling or descaling Rough and dull 2E surface Cold rolling, heat treatment and descaling wi ...

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  • Eight kinds of gaskets

    Eight kinds of gaskets

    Industrial rubber Natural rubber is suitable for water, sea water, air, inert gas, alkali, salt aqueous solution and other media, but it is not resistant to mineral oil and non-polar solvents. Its long-term service temperature is not more than 90 ℃, and its low-temperature performance is e ...

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  • Why to say: the bolt does not loosen unceasingly, a looseness breaks?

    Why to say: the bolt does not loosen unceasingly, a looseness breaks?

    The threaded fastener has the advantages of compact structure, convenient disassembly, large connection force and repeated use. It has great advantages in the use of the equipment, which ensures the reliability and stability of the mechanical system. Threaded fasteners have become one of the standa ...

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  • Study on persistent fracture behavior of GH907 alloy forgings

    Study on persistent fracture behavior of GH907 alloy forgings

    By comparing the composition and structure of the qualified and unqualified samples of the notch durability of GH907 forgings, the behavior of the persistent fracture of GH907 forgings was studied. The results show that the permanent fracture mode of GH907 forgings is mainly intergranular crackin ...

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  • Several common metal cutting methods

    Several common metal cutting methods

    The first step in metal processing is cutting. The raw materials are simply cut off or separated according to the shape to get the blank. Common metal cutting methods are: grinding wheel cutting, saw cutting, flame cutting, plasma cutting, laser cutting and water jet cutting. Grinding wheel cutti ...

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  • Fracture analysis of an aeroengine filter tube bushing

    Fracture analysis of an aeroengine filter tube bushing

    What is a tube bushing? As an important part of aero-engine, tube bushing is used for the installation of gears and bearings in the shell. The materials of pipe sleeves are carbon steel and titanium alloy. In order to reduce the weight of the engine, titanium alloy bushing is the majority. The ...

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