论文部分内容阅读
采用Gleeble-3500试验机对0Cr11Ni2MoVNb、1Cr20Co6Ni2Mo1WV和403Nb高合金马氏体耐热钢进行热压缩试验,结果表明,3种钢的热变形表观激活能分别为461.6、508.1l和571.1 kJ/mol。通过同其他研究对比,发现影响钢的表观激活能的因素主要是碳含量和合金元素含量。在普碳钢以及微合金钢中,合金元素含量少,形成的碳化物少,对钢的表观激活能影响不大;对于高合金钢,一方面是由于碳化物,尤其是细小的NbC粒子对位错的钉扎作用,另一方面是由于合金元素的固溶强化作用,使得高合金钢的热变形表观激活能随钢中碳含量和合金元素含量的增加而增加。
The hot compression tests of 0Cr11Ni2MoVNb, 1Cr20Co6Ni2Mo1WV and 403Nb high alloy martensitic heat-resistant steels were carried out by Gleeble-3500 test machine. The results show that the apparent activation energy of heat deformation of the three steels are 461.6, 508.1l and 571.1 kJ / mol, respectively. By comparing with other studies, it is found that the main factors affecting the apparent activation energy of steel are carbon content and alloying element content. In general carbon steel and microalloyed steel, the content of alloying elements is small, the formation of less carbide, the apparent activation of steel has little effect; for high alloy steel, on the one hand due to the carbide, especially the small NbC particles On the other hand, due to the solid solution strengthening effect of alloying elements, the apparent thermal activation energy of high alloy steel increases with the increase of carbon content and alloying element content in the steel.