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  • Study on Microstructure and properties of TP304H austenitic heat resistant steel boiler tube

    Study on Microstructure and properties of TP304H austenitic heat resistant steel boiler tube

    In order to study the microstructure and properties of TP304H austenitic heat-resistant steel which has been used for a long time under high temperature and high pressure and overheated tube burst, the metallographic structure analysis, electronic bell test, SEM energy spectrum analysis and mecha ...

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  • Special 316L stainless steel fasteners with molybdenum help the world's largest particle accelerator

    Special 316L stainless steel fasteners with molybdenum help the world’s largest particle accelerator

    The Large Hadron Collider (LHC) is one of the largest and most complex scientific instruments in the world. The collider smashes subatomic particles with unimaginable power. The data produced by the collider can help physicists answer some important fundamental questions in physics and explain the ...

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  • Quenching crack of failure steel caused by improper heat treatment

    Quenching crack of failure steel caused by improper heat treatment

    Defects and anomalies may occur in any heat treatment process associated with cold extrusion or forming, such as homogenization, preheating and annealing. Overheating and burning can reduce strength and toughness. Another important reason of fracture may be caused by abnormal defects during surface ...

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  • Strengthening quenching heat treatment process of thin gear

    Strengthening quenching heat treatment process of thin gear

    Thin gears are widely used, such as instrumentation, aerospace, and other fields. Because this field requires high precision of thin gears, it is necessary to ensure the processing accuracy and strictly control the deformation in the processing and production. This article uses 3Cr13 steel as the m ...

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  • Cause Analysis and Solution of Internal Leakage of Electric Forged Steel Ball Valve

    Cause Analysis and Solution of Internal Leakage of Electric Forged Steel Ball Valve

    The electric forged steel ball valve has been widely used in various industrial control systems because of its high control precision and convenient installation and debugging. However, in the process of use, there are also some problems bothering the field installation and commissioning personnel, ...

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  • Common faults and preventive measures of valves

    Common faults and preventive measures of valves

    The performance that the valve continuously maintains and completes the given function requirements in a certain period of time, so that the given parameter value can be maintained within the specified range is called fault free. When the performance of the valve is damaged, it will cause failure. ...

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  • Development of Large Diameter 800H Alloy Seamless Butt Welding Pipe Fittings

    Development of Large Diameter 800H Alloy Seamless Butt Welding Pipe Fittings

    Because 800H alloy has good high-temperature mechanical properties, high-temperature creep resistance, oxidation resistance and corrosion resistance, it has been more and more widely used in industrial pipelines, especially in petroleum, chemical, nuclear power and other fields. In this case, the d ...

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  • What metal's surface finish and surface roughness?

    What metal’s surface finish and surface roughness?

    Different molds have different processing requirements for accuracy. The mold factory will clarify the surface roughness or finish of the workpiece when purchasing materials from the mold steel material supplier. Then, what surface finish? What is surface roughness? What surface finish? Surface ...

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  • How to select the material of stem and stem nut?

    How to select the material of stem and stem nut?

    What is a stem? The valve stem is not only a moving part, a stressed part, but also a seal in the process of valve opening and closing. At the same time, the valve stem is impacted and corroded by the medium, and it also has friction with the packing. Therefore, when selecting the valve stem m ...

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  • Design of inlet and outlet pipeline of pump

    Design of inlet and outlet pipeline of pump

    Cavitation phenomenon: when the static pressure of the liquid entering the first stage impeller of the pump is lower than or equal to the saturated vapor pressure at this temperature, the liquid vaporizes and generates vapor bubbles. With the liquid flowing into the higher pressure, the vapor bub ...

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  • What is a high-entropy alloy?

    What is a high-entropy alloy?

    What is a high-entropy alloy? The development experience of traditional alloys believes that after more metal elements make up the alloy, many brittle intermetallic compounds with complex structures will be formed, which will deteriorate the properties of the alloy. However, in recent years, r ...

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  • Microstructure and properties of Ni based corrosion resistant alloy hastelloy C-276 seamless pipe

    Microstructure and properties of Ni based corrosion resistant alloy hastelloy C-276 seamless pipe

    The nickel-based corrosion-resistant alloy: Hastelloy C-276 blank tube is extruded by hot extrusion process. A 25 mmx2.5 mm seamless tube was developed through multi-pass cold rolling deformation. The results show that the average grain size of Hastelloy C-276 alloy pipe is about 7, and it has ...

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