采用X射线衍射、扫描电镜和透射电镜等研究了新型铁素体叶片钢在620℃长期时效过程中,M23C6碳化物和MX碳氮化物的析出行为。结果表明：620℃、2 000h时效下,M23C6主要在时效过程中析出,且时效初期析出较快,而后缓慢析出,Nb（CN）相主要在热处理回火和时效初期析出;M23C6、Nb（CN）第二相620℃×2 000h的热稳定性较好。
Precipitation behavior of M23 C6 carbides and MX carbonitrides were investigated by X-ray diffraction and scanning electron microscopy and transmission electron microscopy in new ferrite-blade-steels during long term aging at 620℃. The results show that M2 C6 are mainly precipitated during aging process with rapid rate of desorption in initial aging step and then slow at 620℃ aging for 2 000 h. Nb（CN） mainly are precipitated during tempering and initial aging process. Thermal stability of M23C6 and Nb（CN） are good at 620 ℃ aging for 2 000 h.
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