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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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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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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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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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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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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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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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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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? 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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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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Laser additive manufacturing is a near-net-shape technology that manufactures solid parts based on material discrete-gradual accumulation. This technology usually uses metal powder as the raw material, sets the laser scanning path through the pre-layered processing of the three-dimensional model, ...

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