Taiyuan Huaxin Cheng Electrical Equipment Co., Ltd. is a high-tech enterprise specialized in the design, development and manufacture of equipment Longitudinal spiral welded pipe equipment, cold-formed steel equipment, sheet and pipe finishing equipment and high-precision slitting line equipment. Taiyuan Huaxin Cheng Electrical and Mechanical Services to introduce you to the traditional hot roll material selection and heat treatment process hot roll often work in high-temperature environment of 700 ℃ ~ 800 ℃, flat head machine manufacturer, and in contact with the hot billet, flat head machine sales, need to withstand strong rolling force, while the surface is subjected to strong wear rolled, flat-head machine, hot-rolled repeatedly heated and cooled by water, is subjected to temperature fluctuation range of thermal fatigue. This requires hot roll material must have high hardenability, low coefficient of thermal expansion, high thermal conductivity and high yield strength and high temperature oxidation resistance. China had used forged steel rolls and unlimited chilled cast iron rolls, in addition to ordinary chilled cast iron, there are chilled cast iron material having a low nickel-chromium-molybdenum, nickel-chromium-molybdenum, nickel-chromium-molybdenum cast iron, high-grade to high-nickel chromium molybdenum chilled cast iron. The disadvantage of such material is low roll hardness, good wear resistance. Later, using a ductile composite cast iron roll, relatively speaking, the service life several times, still in use. Abroad are generally semi-steel and high hardness special semi-steel, flat head machine franchise, to overcome the surface roughness and wear very effective. Taiyuan Huaxin Cheng Electrical Equipment Co., Ltd. is a high-tech enterprise specialized in the design, development and manufacture of equipment Longitudinal spiral welded pipe equipment, cold-formed steel equipment, sheet and pipe finishing equipment and high-precision slitting line equipment. Taiyuan Huaxin Cheng electromechanical equipment to introduce you to the high-frequency straight seam welded steel pipe straight seam welded steel pipe production process is by high-frequency welding unit to the elongated strip certain specifications and rolled into a round tube straight seam welded Steel Pipe. Shape steel pipe can be circular, square or may be profiled, it depends on the sizing after welding. Welded steel pipe materials are mainly: low carbon steel and low-alloy steel σs≤300N / mm2, σs≤500N / mm2 or other steel. Flat head machine distributor | Taiyuan Huaxin Cheng Electrical and Mechanical (certified) | flathead machine offered by Taiyuan Huaxin Cheng Electrical Equipment Co., Taiyuan Huaxin Cheng Electrical Equipment Co., Ltd. (www.tyhxc.com) (www.tyhxc.net) is Jinzhong, other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum to meet customer needs. In Huaxin Cheng electromechanical leadership with the staff warmly welcome all inquiries negotiations to create a better future Huaxin Cheng electromechanical.