利用Gleeble-3800热模拟试验机、光学显微镜、扫描电镜和能谱仪等研究了稀土元素铈对铸态00Cr25Ni7Mo4N超级双相不锈钢在应变速率为5 s-1、变形温度为1 100,1 150,1 200℃下热变形行为的影响.结果表明:稀土元素铈能够降低该钢中氧、硫含量,使钢中的夹杂物由硫化物变成稀土夹杂物,从而在一定程度上改善了该钢的热变形能力;铈的较佳添加量为0.165%～0.220%,适宜的热变形温度为1 150～1 200℃.
The effect of rare-earth element Ce on the hot deformation behavior of as-cast 00Cr25Ni7Mo4N super duplex stainless steel (SDSS), which was carried out on Gleeble-3800 hot simulator in temperature range of 1 100, 1 150, 1 200 ℃ and at a stain rate of 5 s-1 , was investigated by using optical microscope, scanning electron microscope, and X-ray energy dispersive spectrometer etc. The results show that Ce could reduce the oxygen and sulfur contents, and the inclusion transformed from sulfide inclusion to rare earth inclusion, thus to some extent improve the hot deformation capacity of the as-cast SDSS. The proper amount of Ce was between 0.165% and 0.220%. The optimizing temperature range of hot deformation was 1 150-1 200 ℃.
参考文献
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