The effect of 960-1040 °C solution temperature on the microstructure and properties of cold-rolled Inconel 601 alloy pipe is studied by metallographic microscope

scanning electron microscope

mechanical test and corrosion test. When the solution temperature rises from 960 °C to 1040 °C

the size of recrystallized grains of alloy pipe gradually increases

and the growth rate is slow at first and then fast

which is mainly related to the dissolution of the precipitates phase and the activity of the elements. In this temperature range

the activation energy of grain growth after holding for 15 minutes is 393.08 kJ/mol

and the relationship between the tensile properties and grain size of alloy meets the Hall-Petch relationship. When the solution temperature is about 1020 °C，the hardness curve and the elongation curve appear at the intersection

and the corrosion rate at this time is also low and stable. The optimal solution treatment process for Inconel 601 alloy is at 1020 °C insulation for 15 min.