（1. Technology Center, Ma′anshan Iron and Steel Co., Ltd., Ma′anshan 243000, Anhui, China 2. School of Metallurgy Engineering, Anhui University of Technology, Ma′anshan 243000, Anhui, China）
Abstract：The relation between heat treatment process and properties of P91 was studied using orthogonal experiment. And the result was verified by heat treatment and production experiment. The heat treatment process was optimized at last.The results showed that the factors which influenced properties of P91 were in sequence as follows: tempering temperature, tempering time, normalizing temperature and normalizing time. By introducing customers′ requirement for the mechanical properties of P91 as the measurement index and verified by experiment, it′s been proved that the P91 steel will get better mechanical properties as well as thin and homogenous tempered lath martensite through （1 050±10） ℃ normalizing process and tempering process at （770±10） ℃ for （210±10） min. The verification of heat treatment and production experiment achieved desired objectives, and can be implemented in production.
汪开忠，郝震宇，胡芳忠，陈世杰，黄贞益. 高压锅炉管用P91钢热处理工艺优化[J]. 中国冶金, 2018, 28(5): 58-63.
WANG Kai- zhong,HAO Zhen- yu,HU Fang- zhong,CHEN Shi- jie,HUANG Zhen- yi. Optimization on heat- treatment process of P91 steel for high pressure boiler tubes[J]. China Metallurgy, 2018, 28(5): 58-63.
2018, Vol. 28 
