The Effect of the Structural State of AISI 321 Stainless Steel on Surface Quality During Turning

Shamarin, N. N.; Filippov, Andrey; Tarasov, S. Yu.; Podgornykh, O. A.; Utyaganova, V. R.

doi:10.17212/1994-6309-2020-22.1-102-113

Cited by 2 publications

(2 citation statements)

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“…In the study [44], at an ECAP temperature of 400 • C and a higher number of ECAP passes (N = 8), it was found that while the strength slightly increased compared to the deformation regime in [43], the ductility significantly decreased (ε = 14%). The level of strength achieved through ECAP in [40,43,44] is comparable to the strength obtained through traditional deformation methods such as cold rolling [45], pressing combined with rolling [47], and radial-shear rolling [48]. In contrast, hot rolling produces a state with noticeably lower strength [45].…”

Section: Discussionmentioning

confidence: 64%

Effect of Rotary Swaging on Microstructure and Properties of Cr-Ni-Ti Austenitic Stainless Steel

Rybalchenko,

Torganchuk,

Rybalchenko

et al. 2023

Metals

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In this study, Cr-Ni-Ti austenitic stainless steel was subjected to rotary swaging in various modes, followed by annealing. The effect of processing conditions on the resulting microstructure and, therefore, on the mechanical properties under static and cyclic loading was studied. After RS the formation of an ultrafine-grained predominantly twinned structure, with structural elements sized between 100–250 nm in Cr-Ni-Ti stainless steel, was observed. The stepwise temperature reduction during rotary swaging allows the manipulation of the microstructure transformations, which eventually leads to the desired properties of the steel. As a result, the ultimate tensile strength increased from 610 MPa to 1304 MPa when the elongation decreased from 40% to 10.5%, and the fatigue limit increased from 425 MPa to 700 MPa. The Cr-Ni-Ti steel is strengthened through the formation of an ultrafine-grained structure, twinning in austenite, and martensitic transformation. Subsequent annealing at a temperature 475 °C triggers the active precipitation of nanosized TiC carbides in the deformed steel. On one hand, the presence of these carbides increases the tensile strength up to 1938 Mpa, while on the other hand, slows down crack propagation with a slight decrease in ductility (ε = 8%) of the deformed sample. At the same time, dispersion hardening does not affect the fatigue limit of steel.

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Section: Discussionmentioning

confidence: 64%

Effect of Rotary Swaging on Microstructure and Properties of Cr-Ni-Ti Austenitic Stainless Steel

Rybalchenko,

Torganchuk,

Rybalchenko

et al. 2023

Metals

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“…Из результатов исследования [3] следует, что при обработке сплава с УМЗ структурой качество поверхности получается выше по сравнению со сплавом с крупнозернистой (КЗ) структурой. Аналогичные исследования про-ведены для точения нержавеющей стали 12Х18Н10Т [4]. В работе также отмечается существенное снижение параметров шероховатости при обработке материала с УМЗ структурой.…”

Section: Introductionunclassified

The study of end milling temperature of low-alloy steel in coarse-grained and ultrafine-grained states

Rastorguev,

Sevastyanov,

Klevtsov

2024

FMT

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The paper presents the results of the study of the end milling temperature of low-alloy steel depending on the cutting modes and the type of crystalline structure. The experiment was carried out on a PROMA FHV-50PD universal milling machine. The blanks were processed using a 12-12D-30C-75L-4F HRC55 carbide milling cutter. No cooling was used during processing. The obtained data were statistically analyzed to identify the dependence of the end milling temperature of low-alloy steel on the processing modes and the steel crystalline structure. When creating a mathematical model of cutting temperature, the authors carried out a bootstrap analysis to identify the significance of the parameters of the processing modes. The mathematical model was chosen using the Akaike informative criterion. It was found that mathematical models of the temperature dependence on processing modes for both types of crystalline structure include the cutting depth in the second power. At the same time, for steel in an ultrafine-grained state, both the cutting depth and the feed are statistically significant. It was not possible to detect the influence of cutting speed on temperature in the studied range of processing modes. Thus, when milling this group of materials, the force component primarily determined by the cutting depth exerts the predominant influence on the temperature regime. The level of cutting temperature when processing steel in an ultrafine-grained state is generally higher than when processing steel in a coarse-grained state, which should be associated with the increased physical and mechanical properties of steel with an ultrafine-grained crystalline structure.

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The Effect of the Structural State of AISI 321 Stainless Steel on Surface Quality During Turning

Cited by 2 publications

References 0 publications

Effect of Rotary Swaging on Microstructure and Properties of Cr-Ni-Ti Austenitic Stainless Steel

Effect of Rotary Swaging on Microstructure and Properties of Cr-Ni-Ti Austenitic Stainless Steel

The study of end milling temperature of low-alloy steel in coarse-grained and ultrafine-grained states

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