Effect of carbon addition on the passivity of hypoeutectic high chromium cast irons

Lee, Jun-Seob; Lee, Junhyeong; Oh, Junseok; Kang, Soon Beom; Baek, Seung-Hoon; Ahn, Jin Ho; Han, Seung Zeon; Lee, Je-Hyun

doi:10.1039/d2ra06902d

Cited by 2 publications

(1 citation statement)

References 28 publications

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“…At the same time, cast irons of hypoeutectic composition with increased carbon concentration (to 2.78 wt. %) are, on the contrary, characterized by reduced corrosion resistance [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbon and Cooling Rate on the Structure of Hypereutectic High Chromium Cast Iron in the Cast State and after Heat Treatment

Panichkin,

Kenzhegulov,

Mamaeva

et al. 2023

J. Compos. Sci.

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The article presents experimental data on the changes in the structural parameters and properties of castings from high-chromium cast iron G-X300CrMo27-1 depending on the carbon content, which ranged from 2.8 to 4.5 wt. %. Castings were obtained under cooling conditions with two cooling rates—0.083–0.117 °C/s and 4.67–5 °C/s. Changes in the structure and properties of these castings after destabilizing annealing and subcritical heat treatment were assessed. Changes in carbon concentration and cooling rate in the crystallization interval have a significant effect on the sizes of primary carbides (Cr, Fe)7C3, and on the fraction of eutectic carbides. The microprobe analysis results indicating the effects of cooling rate on the composition of phases in cast iron castings with carbon contents of 4.2 wt. % are presented. The offset value of the crystallization onset temperature and eutectic point with an increase in the cast iron melt cooling rate from 0.083 to 0.83 °C/s is shown. The changes found in the properties of castings with increases in carbon concentration and cooling rate cannot be unambiguously explained by the transformation of the structure of primary and eutectic carbides and changes in the elemental composition of phases. The composition and condition of the matrix has a significant effect on the hardness, bending strength and abrasion resistance of castings. It is suggested that internal stresses arising in primary and eutectic carbides affect the properties of castings in the cast and heat-treated state.

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“…At the same time, cast irons of hypoeutectic composition with increased carbon concentration (to 2.78 wt. %) are, on the contrary, characterized by reduced corrosion resistance [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbon and Cooling Rate on the Structure of Hypereutectic High Chromium Cast Iron in the Cast State and after Heat Treatment

Panichkin,

Kenzhegulov,

Mamaeva

et al. 2023

J. Compos. Sci.

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Preferential dissolution behaviour of the austenite phase in Fe–27Cr–xC high chromium cast iron

Lee

Rho

et al. 2023

RSC Adv.

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Effect of carbon addition on the passivity of hypoeutectic high chromium cast irons

Abstract: The effect of adding C on the passivity of hypoeutectic high chromium cast iron (HCCI) was investigated in a pH 8.4 boric-borate buffer solution.

Cited by 2 publications

References 28 publications

Effect of Carbon and Cooling Rate on the Structure of Hypereutectic High Chromium Cast Iron in the Cast State and after Heat Treatment

Effect of Carbon and Cooling Rate on the Structure of Hypereutectic High Chromium Cast Iron in the Cast State and after Heat Treatment

Preferential dissolution behaviour of the austenite phase in Fe–27Cr–xC high chromium cast iron

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