Experimental and Numerical Study on the Effect of ZDDP Films on Sticking During Hot Rolling of Ferritic Stainless Steel Strip

Líu, Hao; Jiang, Zhengyi; Wei, Dongbin; Gong, Dunwei; Cheng, Xiawei; Zhao, Jingwei; Luo, Shi-Zhong; Jiang, Laizhu

doi:10.1007/s11661-016-3652-y

Cited by 9 publications

(6 citation statements)

References 21 publications

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“…Moreover, the change in relative velocity between copper strips and roll caused inversion in the friction force direction, which then facilitated the generation of surface defects [1]. The excellent rolling oil could completely protect the strips from adhesion, narrow the crack sizes and suppress the crack propagation, which in turn alleviated the adhesion problems on the rolling interface [21,22].…”

Section: Microstructure Of Rolled Stripsmentioning

confidence: 99%

Exploration on tribological behaviour of coumarin as copper rolling oil additive through surface characterization

Tang

Sun

Zhao

et al. 2020

Surf. Topogr.: Metrol. Prop.

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Tribological performance of coumarin in copper rolling oil was studied by four-ball tests and cold rolling tests. Then a systemic investigation on surface topography and surface chemistry of rolled strips was performed by field emission scanning electron microscope (FE-SEM), laser scanning confocal microscopy (LSCM), x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS) and Raman spectroscopy (Raman). Results showed that coumarin was a kind of potential lubrication additive. The average friction coefficient (AFC) and wear scar diameter (WSD) were reduced by 30.2% and 30.1%, respectively, when the optimum concentration of coumarin (2.0 wt%) was added in copper rolling oil. Meanwhile, as the formation of tribofilm during rolling process, the nonuniform deformation and adhesive wear were effectively inhibited. Thinner copper strips with fine surface quality were obtained. The surface average roughness (Sa) of rolled copper strips was reduced by up to 68.8%. Surface characterization showed that the carbonyl group in coumarin molecule connected to Cu atoms with its molecular plane vertical or tilted to the metal surface. Besides, thermal analysis disclosed that this tribofilm had negligible surface residuals, especially when coumarin concentration was lower than 3.0 wt%.

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Section: Microstructure Of Rolled Stripsmentioning

confidence: 99%

Exploration on tribological behaviour of coumarin as copper rolling oil additive through surface characterization

Tang

Sun

Zhao

et al. 2020

Surf. Topogr.: Metrol. Prop.

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Section: Introductionmentioning

confidence: 99%

“…The sticking behavior is heavily influenced by Cr content and the C/N ratio in ferritic stainless steel. [5] In addition, the nucleation and growth of Cr oxides are promoted by Si element in the steel. [6] Therefore, the microstructure of oxide scale is affected by the alloying elements, resulting in the sticking is also affected.In hot rolling at high temperatures (500-1200 °C), [7] water is used as a coolant in several stages of hot rolling such as finishing rolling and laminar flow cooling, leaving the ferritic stainless steel in a high-temperature water vapor atmosphere.…”

mentioning

confidence: 99%

Study of the High‐Temperature Oxidation Behavior of SUS430 Ferritic Stainless Steel Under Different Content of Water Vapor Atmosphere

Qian,

Sun,

Tang

et al. 2023

steel research int.

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The oxidation behavior of SUS430 ferritic stainless steel is studied during isothermal oxidation at 1100 °C for 2 h under a mixture of 10, 30, and 50% water vapor and air, and oxidation kinetics curves are drawn. The surface morphology and phase composition of oxide scale are analyzed using X‐Ray diffractometer, scanning electron microscope, and energy dispersive spectrometer. The oxidation kinetic curves under three different humidities are S‐shaped and include three stages: induction period, acceleration period, and deceleration period. The controlling steps under 10% water vapor and air are nucleation and growth, while under 30% and 50% water vapor and air are both phase boundary control reactions. The induction period becomes shorter and the breakaway oxidation occurs earlier with increasing water vapor content. The structure of oxide scale produced is layered, with the outer layer being iron oxide and the inner layer being mainly the Fe–Cr spinel phase. The volatilization of Cr and the growth stress of the Cr2O3 layer cause the formation of nodules, and a large number of cracks are generated in oxide scale. The cracks provide diffusion paths, accelerating the diffusion of Fe ions and electrons, as well as the erosion of the substrate.

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“…However, during the hot rolling of ferritic STSs with a high Cr content, oxide flakes form and stick to the rollers, deteriorating the surface of the STSs. , Because the surface quality is critical, STSs with indented surfaces have significantly diminished value. , Therefore, many engineers have tried to explain the fundamental mechanisms , and address the sticking failure problem with empirical control of alloying elements, structural analysis, processing parameter controls, and replication of hot-rolling processes . Kim et al suggested failure mechanisms with different types of commercial STSs on the basis of an ex situ elemental image analysis of the microstructure of the scale and the exposed fractured surface.…”

Section: Introductionmentioning

confidence: 99%

In SituScanning Electron Microscopy Analysis of the Interfacial Failure of Oxide Scales on Stainless Steels and Its Effect on Sticking during Hot Rolling

et al. 2022

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Despite various strategies to address sticking failure in stainless steels (STSs), difficulties in understanding its fundamental mechanisms hinder precise solutions during STS fabrication. This study investigated the effect of chromium (Cr) content on the microstructures and failure modes of oxide scales under a tensile load, simulating the hot-rolling process. The dynamic, real-time behavior of crack initiation, propagation, and interfacial delamination in the oxide scales under tension was analyzed using an in situ scanning electron microscopy (SEM) tensile test. With a high Cr content, iron (Fe) oxide and chromium(III) oxide (Cr 2 O 3 ) form a layered structure, which is delaminated along the interfaces between the thin Cr 2 O 3 layer and the bulk after perpendicular cracking. The saturated crack densities obtained from in situ SEM provide interfacial strength, while the elastic modulus and hardness obtained from nanoindentation provide vertical fracture strength. In combination with an ex situ elemental image analysis, the in situ SEM results reveal three different failure modes of the four different STSs. The results confirm that sticking failure is more likely to occur as the Cr content increases.

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Experimental and Numerical Study on the Effect of ZDDP Films on Sticking During Hot Rolling of Ferritic Stainless Steel Strip

Cited by 9 publications

References 21 publications

Exploration on tribological behaviour of coumarin as copper rolling oil additive through surface characterization

Exploration on tribological behaviour of coumarin as copper rolling oil additive through surface characterization

Study of the High‐Temperature Oxidation Behavior of SUS430 Ferritic Stainless Steel Under Different Content of Water Vapor Atmosphere

In SituScanning Electron Microscopy Analysis of the Interfacial Failure of Oxide Scales on Stainless Steels and Its Effect on Sticking during Hot Rolling

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