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Abstract：
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The deformation characteristics of hot-pressed elbow, hot-pressed tee and hot-pressed head for typical pipe fittings in power station were analyzed, and the deformation rate of hot-pressed tee was the largest which was up to 38%. Then, the hot press bending process of G115 steel was simulated, and the results covered the most severe deformation. Furthermore, a hot press bending process test was designed to study the influences of different forming temperatures, passes and cooling methods on the forming, and the visual inspection, the penetration inspection, the hardness inspection and the microstructure observation were conducted on the samples. Finally, through the test research of hot press bending process, it is concluded that the heating temperature of raw materials is 1060-1080 ℃ during the hot press bending process of pipe fittings for G115 steel, the pipe fittings of G115 steel do not produce cracks and other defects at the temperature range of 600 ℃ or more and could be air-cooled after forming. Thus, the performance of trial-produced large-diameter pipe fittings for G115 steel meet the requirements to verify the feasibility of hot press bending process.
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Funds：
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国家重点研发计划(2017YFB0305202)
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AuthorIntro：
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彭杏娜（1983-），女，博士，高级工程师，E-mail：pengxingna2325@163.com
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Reference：
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