What industries use welding machines?
Published Time:
2020-10-26
Oil casing production methods include hot-rolled seamless steel pipes and welded pipes produced by welding machines. Since welded oil casings have a weld seam, addressing issues such as matching the strength and toughness of the base material and weld seam, weld seam gray spots, and groove-like corrosion in the weld seam is crucial in production.
Oil casing tubes are produced using two methods: hot-rolled seamless steel pipes and welded pipes using welding units. Since welded oil casing tubes have a weld seam, addressing issues such as matching the toughness of the base material and the weld seam, weld seam gray spots, and groove-like corrosion of the weld seam is crucial in production.
In the production of oil casing tubes using welding units, the weld seam toughness is affected by the toughness of the base material, the chemical composition of the base material, and the welding process. Reducing the content of elements such as C, S, P, and Cr in the raw strip steel can improve weld seam toughness; controlling the width of the bright line, the angle of the streamline, and the content of non-metallic inclusions during the welding process can also significantly improve weld seam toughness; in addition, controlled cooling after the welded pipe undergoes hot tension reduction can improve the toughness of the weld seam and other areas of the welded oil casing tube.
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