Influence of stress relieving annealing on surface residual stress,microstructure and properties of B10 colomony equal diameter tee

doi:10.13251/j.issn.0254-6051.2023.07.019

Abstract

Abstract: Vacuum stress relieving annealing of the B10 colomony equal diameter tee formed by internal high pressure was implemented at different temperatures and holding time. The evolution of mechanical properties and residual stress of the B10 colomony equal diameter tee during stress removal annealing was researched. The results show that the surface residual stress of the main pipe and branch pipe of equal diameter tee is compressive stress, and the surface residual stress of the transition position between the main pipe and branch pipe of equal diameter tee is tensile stress. On the premise of not damaging mechanical properties, stress removal annealing can obviously eliminate the surface residual stress of the B10 colomony equal diameter tee. In the range of orthogonal, axial and shear residual stresses of pipe fitting are basically eliminated after annealing at 300 ℃ for 1 h and cooling with the furnace.

Key words: B10 colomony equal diameter tee, stress relieving annealing, surface residual stress, mechanical properties

CLC Number:

TG146.2

Wang Junliang, Zhou Tiezhu, Fu Liguo, Yu Yan, Li Chunhui. Influence of stress relieving annealing on surface residual stress,microstructure and properties of B10 colomony equal diameter tee[J]. Heat Treatment of Metals, 2023, 48(7): 111-116.

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