Effect of heat treatment on the binding area properties of Zr-%1Nb sheets by TIG pulse welding process

Zirconium and its alloys are mastered for the manufacture of pressure vessels, nuclear,aerospace and biomedical industries due to their thermal expansion and high corrosionresistance. Heat causes grain growth and changes the properties of welding areas. According to the Nb-Zr fuzzy equilibrium diagram and the thickness of the samples,normalizining heat treatment with a temperature of 900°C for 7 minutes and different cooling in water, air and oil was performed on Zr-%1Nb sheets welded with a thicknessof 0.7 mm without filler metal. Microscopic optical analysis was used for grain size,structure and hardness test in Terms of Wickers. Investigation of heat treatment on grainsize and structure of Wadman Stataten in welding and haz metal had no significant effect, but it reduced their hardness.

Keywords:

Zr-%1Nb , Heat treatment , Grain growth , Cooling rate. Hardness test.