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Heavy-duty high-precision rotary center and its application on gear hobbing machine
Heavy high-precision rotary top and its application on thread rolling machine
Thread rolling machines are used to make high-precision threads by manipulating, or rolling, steel bars into various threads or grooves. To do this, the bar must be held in a steady and reliable way. Heavy high-precisio......
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Control Transformer Technical Parameters
Control Transformer Technology Parameters
Control transformers are used to convert low voltages of up to 480 volts to the standard 120 / 240 volts required for control equipment when used in a circuits powered by a higher voltage. Control transformers usually operate at a power rating of around 1......
Metric lathe turning metric thread exchange gear table in thread processing
Metric Thread Turning on a Lathe
The process of creating a metric thread on a lathe has been around for a long time, and it is a relatively straightforward procedure for properly trained machinists. The process consists of the lathe spinning and holding a work piece with a cutting tool, or tool b......
GB 8981-88 Determination of Trace Hydrogen in Gas Gas Chromatography
Abstract
This paper introduces the determination of trace hydrogen in gases by gas chromatography method. The determination involves several steps including sample collection, sample treatment, column selection, instrumentation and data analysis. As this procedure is a sensitive quantitative anal......
The latest method for inspecting the cleanliness of metal surfaces
Introduction
Metal surface cleanliness has traditionally been assessed by visual methods and tactile methods. Visual methods are limited by the resolution capabilities of the human eye, and tactile methods are time consuming and prone to human errors. In recent years, a wide variety of new method......
Phosphating
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Structural Characterization of Films Formed by Chemical Phosphating
Chemical phosphating is a chemical surface treatment used to improve corrosion resistance and paint adhesion on metals such as steel and aluminum. The process involves the application of a phosphoric acid solution to the su......
Upsetting table
Air pollution is a very pressing issue facing the world today. There are many countries that are experiencing extremely poor air quality as a result of rapid industrialization and energy production growth. This is having a severe impact on human health, with numerous studies linking particulate ma......
Oriented crystal AlNi alloy magnet
Introduction
Magnetic alloys composed of aluminum, nickel and zinc have been widely used in many industries due to their excellent magnetic properties and good electrical conductivity. AlNiZn alloys are attractive due to their high coercive forces, low coercivity, good resistance to oxidation and......
X-ray diffractometer
X-ray diffraction (XRD) is an advanced analytical technique used to identify both the chemical and crystalline structures of substances. This type of analysis begins in the laboratory where a sample of the material is placed in a device called an X-ray diffractometer. When synchrotron radiation or......
Effect of Annealing Temperature on Microstructure and Hardness of Chilled Low Chromium Molybdenum Ductile Iron Roll
Effect of Annealing Temperature on Microstructure and Hardness of Cold-Worked Low Cr-Mo-Ball Iron Rolls
Abstract
In this paper, the effects of annealing temperature on hardness and microstructure of cold-worked low Cr-Mo-ball iron rolls were studied. Metallographic analysis and nanoindentation t......
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