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根据T91的CCT曲线确定了等温退火工艺,对T91母管进行了等温退火试验。结果表明,等温退火后,T91母管符合后续冷加工所要求的力学性能,等温退火工艺适用于加热后的T91母管,等温热处理工艺可以提高生产效率。
The isothermal annealing process was determined according to the T91 CCT curve and the isothermal annealing test on the T91 mother pipe was carried out. The results show that, after isothermal annealing, the T91 mother pipe meets the mechanical properties required for subsequent cold working. The isothermal annealing process is suitable for the heated T91 mother pipe. The isothermal heat treatment process can improve the production efficiency.