摘要
利用热力学软件Thermal-Calc计算了Sanicro25耐热钢中的平衡态析出相,分析讨论了关键元素含量变化对析出相的影响规律。研究结果表明:增加钢中W、C含量可以升高M23C6的回溶温度以及增加M23C6的析出量,Cr、Co含量对M23C6的析出量没有明显影响;Cr含量越低,W含量越高,Laves相的回溶温度越高,析出量越大;Cr、N含量越低,Nb含量越高,MX相的析出量越高;Nb含量越高,N含量越少,Z相的析出量越大;W、Cr含量越高,σ相析出量越大,回溶温度越高。
With the Thermal-Calc software, the precipitated phases in Sanicro25 heat resistant steel were calcu- lated. The effects of key elements contents on the precipitation behavior were discussed. The research results indicated that with the increasing of W and C content, the amount and dissolving temperature of M23 C6 increased obviously while Cr and Co content did not affect the amount of M23 C6 obviously. With Cr content decreasing and W content in- creasing, the amount and precipitation temperature of Laves phase increased obviously. With Cr, N content decreasing and Nb content increasing, the amount of MX phase increased obviously. The amount of Z phase increased, when the amount of Nb content increased while N content decreased. The amount and precipitation temperature of σ phase in-- creased with the increasing of Cr and W content.
基金
国际科技合作项目(2012DFG51670)
国家能源应用技术研究及示范工程(NY20110102-1)
