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采用Gleeble-3500型热模拟试验机、金相显微镜研究了加热速度、冷却速度对低碳微合金钢相变点及CCT曲线的影响。结果表明:加热速度对奥氏体相变点有显著影响,随加热速度的增加,相变点呈线性增加;随冷却速度的降低,钢的强度显著下降,组织发生粗化,且出现带状组织。
The influence of heating rate and cooling rate on the transformation temperature and CCT curve of low carbon microalloyed steel was studied by Gleeble-3500 thermal simulation tester and optical microscope. The results show that the heating rate has a significant influence on the austenite transformation temperature, and the transformation point increases linearly with the increase of heating rate. With the cooling rate decreasing, the strength of steel decreases significantly, the microstructure becomes roughened, organization.