Microstructure and properties of TC4 alloy sheet by EB melting slab straight rolling

doi:10.13251/j.issn.0254-6051.2020.09.036

Abstract

Abstract: TC4 alloy slab prepared by one -time EB melting was directly rolled,and the microstructure and mechanical properties of the hot rolled and annealed alloy sheet with different rlling times were studied.The results show that after 1 -3 rounds of direct rlling,the coarse as-cast micorstructure of the alloy is broken continuously,the quantity and the size of equiaxed a phase is gradually increased and reduced,respectively,and the mechanical properties of each rlling round sheet meet the standard requirements.With the increase of annealing temperature,the tensile strength and yield strength of the finished products of each rolling round show a downward trend,and the elongation increases first and then decreases.After annealing at 850 C,the TC4 alloy sheet can obtain the best combination of strength and toughness.The anneal temperature in the industrial batch production of EB primary melting slab direct-rolling TC4 alloy sheet is recommended to use 700-850 C,and the microstructure and mechanical properties can reach the technical requirements of the sheet prepared by forging billet.

Key words: EB melting, TC4 alloy slab, rlling, annealing, microstructure, mechanical properties

CLC Number:

TG146.2⁺3

Zhang Qiang, Hao Xiaobo, Li Bobo, Pei Teng, li Yang, Liu Yinqi. Microstructure and properties of TC4 alloy sheet by EB melting slab straight rolling[J]. Heat Treatment of Metals, 2020, 45(9): 195-202.

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