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

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.