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首页> 外文会议>Iron Steel Supplement 2005 vol.40: The Joint International Conference of HSLA Steels 2005 and ISUGS 2005 >Dilatometric Study on the Start Temperature for γ to a Phase Transformation in C-Mn Steels Micro-alloyed with Nb
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Dilatometric Study on the Start Temperature for γ to a Phase Transformation in C-Mn Steels Micro-alloyed with Nb

机译：Nb微合金化C-Mn钢中γ转变为相变的起始温度的定量研究

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摘要

Series of tests with or without hot deformation were carried out on a THERMECMASTER_Z simulator, The measured A_(r3) temperatures showed that they decreased and then increased with increasing Nb content ranging from 0 to 0.038wt.% under both deformed and non-deformed conditions. It is believed that in Nb bearing steels, the Nb solute drag effect that could delay austenite to ferrite transformation, Nb precipitates in austenite which could enhance the transformation kinetics. These factors worked together to make A_(r3) changing with Nb content in a parabolic way. Based on the experimental results, mathematical modeling for the A_(r3) calculation for Nb and C-Mn steels were developed.
机译：在THERMECMASTER_Z仿真器上进行了有或没有热变形的一系列测试，测得的A_（r3）温度表明，在变形和未变形条件下，Nb含量从0到0.038wt。％都先降低然后升高。 。据认为，在含铌钢中，Nb溶质拖曳效应会延迟奥氏体向铁素体的转变，Nb会在奥氏体中析出，从而增强相变动力学。这些因素共同作用使A_（r3）随Nb含量以抛物线方式变化。根据实验结果，建立了Nb和C-Mn钢A_（r3）计算的数学模型。

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