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The Effect of Applied Compression Stress on Isothermal Phase Transformation Kinetics and Transformation Plasticity of Bainite for HQ785 Steel

机译：施加压缩应力对HQ785钢贝氏体等温相变动力学和相变塑性的影响

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The study of isothermal bainite transformation under the applied compression stress for the HQ785 steel was carried out on the Gleeblel500 thermal simulation test machine, according to the expansion curve of bainite transformation with different stress and isothermal temperature, the simulated calculation of the phase transformation kinetics and transformation plasticity is carried out. The results show that, the applied compression stress promotes bainite transformation, with the stress increased, the incubation period of phase transformation becomes shorter. With the stress increased, the parameter b of bainite transformation kinetics equation shows the tendency of increasing, however, the increasing rate of b-valued is different under the different isothermal temperature and applied stress. When the applied stress is in elastic range, phase transformation plastic coefficient K increased with the stress increased. The bainite transformation kinetics model was adopted to numerical simulation of the bainite transformation process, the results of which are in good agreement with the measured, which shows that the calculation model is correct.
机译：在Gleeblel500热模拟试验机上对HQ785钢在施加压缩应力下的贝氏体等温转变进行了研究，根据不同应力和等温温度下贝氏体的膨胀曲线，对相变动力学和相变动力学进行了模拟计算。进行转变可塑性。结果表明，施加的压缩应力促进贝氏体转变，随着应力的增加，相变的潜伏期缩短。随着应力的增加，贝氏体转变动力学方程的参数b呈现增加的趋势，但是，在不同的等温温度和外加应力下，b值的增加率不同。当施加的应力在弹性范围内时，相变塑性系数K随应力的增加而增加。贝氏体转变动力学模型用于贝氏体转变过程的数值模拟，其结果与实测值吻合良好，表明计算模型是正确的。

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