Effect Of Cooling Mode On Microstructure And Mechanical Properties Of TA10 Titanium Alloy

Select the TA10 titanium alloy bar, heat it to the temperature of 820 ℃ in the two-phase zone and keep it for 2 hours, then use water cooling, air cooling and furnace cooling for cooling treatment, and then use optical microscope, Vickers hardness and tensile property test to study the relationship between its structure and mechanical properties. The results show that after water cooling treatment α Phase reduction and large amount of hexagonal martensite precipitation α‘ Phase, the structure changes from equiaxed structure to bimodal structure, and after air cooling treatment, there is primary growth in the structure α In addition, secondary α Phase, after furnace cooling treatment, primary growth α The phase volume is obviously increased and thickened, and the secondary formation of fine bar is formed α Phase; The hardness of the alloy treated by different cooling methods is water cooling, air cooling and furnace cooling from the largest to the smallest. The hardness of water cooling is the largest, while the difference between air cooling and furnace cooling is small; After the alloy is treated by different cooling methods, the tensile strength and yield strength of the alloy are the maximum after water cooling treatment, and the minimum after furnace cooling treatment. In terms of plasticity, the trend of elongation after fracture of the alloy is opposite to the strength.