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由于超(超)临界(USC)发电机组节能环保,标准煤耗达280g/kW·h左右,超超临界机组在我国发展极为迅速。新型耐热钢(SA213-T92)在USC机组上大量使用,到目前为止在实际工程中运行的时间不长。与T/P91钢相比,T/P92钢的高温蠕变断裂强度提高了25%~30%,具有更好的高温热稳定性和热强性,极限长期使用温度达到620~630℃[1,3]。T/P92钢是在T/P91钢的基础上,增加了约1.7%的W,将Mo含量从1%降到约0.5%,另增加少量B、Nh、V、N,其化学成分(质
Due to the energy saving and environmental protection of ultra-supercritical (USC) gensets, the standard coal consumption is about 280g / kW · h, and the ultra-supercritical units are developing very rapidly in our country. The new heat-resistant steels (SA213-T92) are heavily used on USC units and so far have not been long run in actual engineering. Compared with T / P91 steel, T / P92 steel creep rupture strength increased by 25% to 30%, with better high temperature thermal stability and thermal strength, the ultimate long-term use temperature reached 620 ~ 630 ℃ [1 , 3]. T / P92 steel is based on T / P91 steel, an increase of about 1.7% of W, the Mo content decreased from 1% to about 0.5%, and the other a small amount of B, Nh, V, N, its chemical composition