热轧变形对Fe-14Cr-3W-0.4Ti合金显微组织和力学性能的影响

doi:10.19976/j.cnki.43-1448/TF.2021055

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Abstract The atomized Fe-14Cr-3W-0.4Ti (mass fraction, %) alloy powder was subjected to mechanical ball milling for 60 h, hot extrusion forming at 950 ℃, hot rolling at 950 ℃ and annealing at 1 050 ℃/1 h to obtain Fe-14Cr-3W-0.4Ti alloy. The effects of hot rolling deformation on the microstructure and mechanical properties of Fe-14Cr-3W-0.4Ti alloy were studied by Scanning Electron Microscopy (SEM) and Electron Backscattering Diffraction (EBSD) analysis. The results show that hot rolling deformation can effectively control the grain size of Fe-14Cr-3W-0.4Ti alloy and improve the mechanical properties of the alloy. After hot rolling, the grain size of the extruded alloy is obviously refined, the grain size decreases first and then increases, and the tensile strength of the alloy also increases first and then decreases with the increase of hot rolling deformation, and the optimum hot rolling parameters of the alloy are 950 ℃/40%. After hot rolling at 950 ℃/40% deformation, the average grain size of the alloy is the smallest and for 1.39 μm, and the tensile strength and elongation of the alloy reach 1 161 MPa and 9.5%, respectively. The tensile strength is increased by 31.2% compared with that of the extruded alloy.

Key words： Fe-14Cr-3W-0.4Ti alloy hot rolled deformation microstructure mechanical properties fine grain strengthening

Received: 09 May 2021 Published: 22 December 2021

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	LU Sizhe
	LIU Zuming
	LI Quan
	REN Yake
	WEI Bing
	PENG Weicai

Cite this article:

LU Sizhe,LIU Zuming,LI Quan, et al. Effect of hot rolled deformation on microstructure and mechanical properties of Fe-14Cr-3W-0.4Ti alloy[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(6): 567-574.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2021055 OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I6/567

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