Rotary bending fatigue behavior of a rare earth addition bearing steel: The effects of a gradient nanostructured surface layer formed by surface mechanical rolling treatment

Dong, G.S.; Gao, Bo; Wang, Z.B

doi:10.1016/j.ijfatigue.2022.107425

Cited by 15 publications

(1 citation statement)

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“…[11][12][13] Additionally, numerous studies have shown that adding rare earth (RE) element in steel can also play an important role in steel microstructure and mechanical property optimization. [14][15][16][17][18] Generally, RE has three effects in steel: deoxidation and purification, modification of inclusions, and microalloying. Recently, with the help of dual-low-oxygen technology (the total oxygen content in the steel melts and, in particular, the initial oxygen content in the raw RE materials) proposed by Li et al, it is found that adding ppmlevel low-oxygen RE into low-oxygen steel can change the traditional Al 2 O 3 and MnS inclusions into uniformly dispersed, small and spherical RE oxides and/or RE sulfides.…”

Section: Introductionmentioning

confidence: 99%

Effects of Rare Earth on the Microstructure and Mechanical Properties of a Pearlitic Steel Wire Rod

Yang

Zhang

Sang

et al. 2023

steel research int.

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The effects of rare earth (RE) on the microstructure and mechanical properties of a pearlitic steel wire rod have been investigated under the dual low‐oxygen condition. The results show that the wire rods with different RE contents all have pearlite microstructure. As RE content increases from 0 to 310 ppm, the pearlite substructures such as interlamellar spacing, pearlite colony size and ferrite grain size decreasing remarkably, indicating that the nucleation and growth behavior of pearlite have changed. This is attributed to the combined effects of stimulating nucleation by large number of micrometer scale RE‐containing inclusions and decreased carbon diffusion due to RE in solution. As a results, the changes in microstructure lead to simultaneous enhancement of strength, plasticity, impact toughness and microhardness of pearlite wire rod, demonstrating that adding appropriate content of RE under the dual low‐oxygen condition is an effective alloying method to optimize the microstructure and mechanical properties of pearlitic steel wire rod.This article is protected by copyright. All rights reserved.

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