Formation and morphology of grain boundary proeutectoid pearlite in 100Mn13 steel during low temperature aging treatment

Ding, Zhe; Liang, Bo; Xu, Zhenfeng; Tian, Rujin; Dong, Linnan; Zhao, Jun

doi:10.1016/j.mtcomm.2022.104887

Cited by 1 publication

(1 citation statement)

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“…The microstructure of the four kinds of anchor bolt steels is mainly composed of pearlite, which appears as a fine lamellar structure. A small amount proeutectoid phase also exists and is inhomogeneously distributed as a result of the proeutectoid phase transformation, which is common in hypoeutectoid steels [17,18]. The results indicated that microalloying and decarburization (as represented by LNiCu) had no obvious influence on the steel microstructure.…”

Section: Microstructural Characterizationmentioning

confidence: 96%

Enhancing the SCC Resistance of the Anchor Steel with Microalloying in a Simulated Mine Environment

Du,

An,

Wang

et al. 2023

Materials

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This work explored a new idea for enhancing the resistance to stress corrosion cracking (SCC) of mining anchor steel through microalloying. Microalloyed anchor steels with Nb, Cu, Ni, Sb, and C were prepared through vacuum smelting and hot rolling. Electrochemical measurements, slow strain rate tensile (SSRT) tests, and fracture morphology observations were used to study the electrochemical and SCC behavior in the simulated mine environment. The results proved that the microstructure of microalloyed steels varies slightly. Adding Ni, Cu, and Sb can improve the mechanical properties of the anchor steel, while reducing C content decreases tensile strength as a result of loss of the solution-strengthening effect. The addition of Sb, Cu, Ni, and reducing the content of C enhances the resistance to corrosion and SCC by mitigating anodic dissolution (AD), while adding Nb improves SCC resistance by inhibiting hydrogen embrittlement (HE). The combined addition of 1% Ni, 0.5% Cu, 0.05% Nb, 0.1% Sb, and 0.5% C presented the highest SCC resistance, which is a promising prospect for the development of high-performance, low-alloy anchor steels. The combined addition of 1% Ni, 0.5% Cu, 0.05% Nb, and 0.1% Sb resulted in the inhibition of electrochemical reactions and corrosion. As a result of the synergistic effect of the microalloy, both AD and HE mechanisms were simultaneously inhibited, which greatly enhanced SCC resistance.

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Section: Microstructural Characterizationmentioning

confidence: 96%