热处理温度对Monel 401管材组织和性能的影响

Influence of Heat Treatment Temperature on Structure and Properties of Monel 401 Tube

介绍了Monel 401管材生产及退火试验方法,分析了冷轧态Monel 401管材试验结果,重点研究了不同退火温度对管材金相组织、力学性能的影响。分析认为:Monel 401管材冷轧态组织为纤维状组织,纤维状组织随退火温度升高而逐渐减少。退火温度700℃时,发生完全再结晶,纤维状组织消失;退火温度550～600℃时,抗拉强度、屈服强度、硬度和伸长率基本保持不变;退火温度600～700℃时,抗拉强度缓慢下降,而屈服强度和硬度呈直线迅速下降,伸长率呈直线迅速上升。退火温度650℃时,管材综合性能较好,满足用户要求。

The production and testing annealing treatments of Monel 401 tubes are introduced. The structure and properties of the as-cold-rolled Monel 401 tubes are analyzed, focusing on the influence of different annealing temperatures on the microstructure and mechanical properties of Monel 401 tubes. The analysis leads to the following conclusions. An as-cold-rolled Monel 401 tube has a fibrous structure, which will become more and more less when annealing temperature increases. At the annealing temperature of 700℃, a complete recrystallization happens and the fibrous structure disappears. When the annealing temperature rises from 550 to 600℃, the tensile strength, yield strength, hardness and elongation rate are basically the same. When the annealing temperature rises from 600 to 700℃, the tensile strength decreases slowly, the yield strength and hardness decreases rapidly, and the elongation rate also increases rapidly. When the annealing temperature is 650℃, a tube shows fairly good comprehensive properities and can meet the user＇ s requirements.