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采用Gleeble-3500型热模拟试验机、金相显微镜研究了正火温度对高频电阻焊管X52钢组织和性能的影响规律。结果表明:在850～1000℃的正火加热温度范围内,其强度随加热温度的升高而降低,在900℃时,强度达到最低值;随加热温度进一步升高,强度增加。而焊缝区在900～1000℃的正火加热温度范围内,随加热温度升高,组织细化,强度增加。在相同的工艺条件下,焊缝和钢板的组织和性能相差不大。
The influence of normalizing temperature on the microstructure and properties of high-frequency resistance welded pipe X52 steel was studied by using Gleeble-3500 thermal simulation tester and optical microscope. The results show that the strength decreases with the increase of heating temperature in the range of normal temperature of 850 ~ 1000 ℃, and reaches the lowest value at 900 ℃. With the heating temperature increasing, the strength increases. The weld zone in the normal temperature 900 ~ 1000 ℃ heating temperature range, with the heating temperature increases, the organization refined, increased strength. Under the same process conditions, the microstructure and properties of the weld and steel plate are similar.