Question

帮忙翻译一下，谢谢（英译汉）

T91钢是在9Cr1Mo钢的基础上添加V、Nb、N等元素而形成的一种新型马氏体型耐热钢，具有很高的高温综合性能，可用来制造火力发电厂锅炉的蒸汽管道、再热器等设施。由于T91钢长期在高温和压力作用下运行，组织发生老化，使其高温性能下降，进而导致管材提前失效甚至发生爆管事故，为保证安全生产，延长其使用时间，对其高温持久强度进行预测显得十分重要。

Answer 1

In nine Cr1Mo T91 steel is the basis of steel add V, Nb, N elements and a new form of heat resistant steel markov shape, has the very high temperature comprehensive performance, can be used to manufacture thermal power plant boiler steam pipe, heaters and other facilities. Due to long-term T91 steel in high temperature and pressure under the effect of operation, the organization happen aging, make its high temperature performance drop, and lead to the failure of tubing even happen ahead of pipe explosion accident, to ensure the safety in production, to prolong the using time, the intensity of high temperature lasting forecast is very important.