2023-07-31 ① Tensile test: measure stress and deformation, determine the strength (YS, TS) and plasticity index (A, Z) of the materialLongitudinal and transverse specimen pipe section, arc, circular specimen (￠10,￠12.5)Small-diameter thin-walled steel pipes, large-diameter thick-walled steel pipes, and fixed g
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2023-07-27 Processing methods of pipe fittings there are many. Many also belong to the scope of machining and the like, the most widely used method of stamping, forging method, roller processing method, rolling method, bulging France, stretching, bending method, and a combination of processing method. Tube pro
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2023-07-26 Frequency welded pipe production process, affecting the quality of the elements have more than one pipe, the main raw materials, welding technology and roll count which is beginning to adjust.Key to look at raw geometric dimensions. Strip geometry affect the quality of the steel strip width when les
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2023-07-25 High-pressure alloy pipe deformation strengthening is using the method of deformation of steel reinforcement. Also known as the strain hardening or work hardening. The strength of the material at the macro (or a whole) the ability to resist deformation (or flow stress). Hardness is the ability of th
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2023-07-24 Transverse cracks will affect the finished product rate just after rolling. Increase billet cleanup time, both great harm. The slab temperature is brittle zone of 700-900 ℃. The reason the lower surface cracks is 1050-1100 ℃, transverse cracks on the surface of the reason is the billet surface by a
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2023-07-21 According to the technological requirements of different manufacturers, precision tubes length measurement systems with a variety of length measurement methods. There are the following:1, The grating length measurementThe basic principle is: the outer ends of precision tubes are provided two fixed l
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2023-07-20 In the field of oil drilling and oil well, high-frequency electric resistance welded casing (referred to as ERW casing) compared with seamless casing is high dimensional accuracy, weld toughness, anti-extrusion of high-performance, and low cost advantages, which has been widely used in foreign count
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