Implications of Accelerated Solidification Rates Seen in Belt Casting on Precipitation in Nb Bearing Steels

Implications of Accelerated Solidification Rates Seen in Belt Casting on Precipitation in Nb Bearing Steels
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带式连铸中的加速凝固速率对含铌钢中析出的影响

DOI:
10.1002/srin.201700358
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发表时间:
2017
影响因子:
2.2
通讯作者:
Slater C
Slater C
中科院分区:
材料科学3区
文献类型:
--
作者:
Slater C

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High temperature confocal microscopy (using cooling rates of 1 and 20 °C s−1) has been used in conjunction with segregation modeling (for cooling rates of 0.1–100 °C s−1) to understand the implications that high cooling rates, representative of that seen for belt casting, has on compositional inhomogeneity and precipitation in high strength low alloy steels. Due to the increased level of segregation (and reduced back diffusion) precipitates are predicted, and shown, to form in the interdendritic solute rich regions at temperatures higher than would be expected under equilibrium conditions at the higher cooling rate. This results in a larger volume fraction of precipitates in samples held at 1000 °C after being cooled at 20 °C s−1compared to those cooled at 1 °C s−1.
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