Effect of TiBAl inoculation and heat treatment on microstructure and mechanical properties of hypereutectic high chromium white cast iron

Yilmaz, Serdar; Teker, Tanju

doi:10.1016/j.jallcom.2016.02.125

Cited by 22 publications

(5 citation statements)

References 15 publications

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“…The addition of 1 kg/T of FeTi, affected the graphite morphology, developing elongated graphite shapes without modifying the amount of graphite. Studies involving 1-3wt% TiBAl inoculant additions to hypereutectic high chromium white cast irons improved microstructures and notch toughness [95]. Results show inoculation of 1 wt.% reduced the sizes of the primary carbides while the sizes of the secondary carbides increased and formed in hexagonal form similar to the primary carbide (but in smaller size).…”

Section: White Cast Ironsmentioning

confidence: 96%

Report on use of Inoculants in Missile Application Alloys

Tiley,

Nag

2024

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Section: White Cast Ironsmentioning

confidence: 96%

Report on use of Inoculants in Missile Application Alloys

Tiley,

Nag

2024

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“…It is speculated that the large shrinkage and porosity of the suspension agent in the simulation software is because the simulation software cannot take into account the exchange of metal materials in different regions. Without considering the shrinkage porosity at the suspension agent, the shrinkage porosity of the casting with a vacuum degree of 0.06 MPa (0.0008 cm 3 ) is significantly smaller than that of the casting with a vacuum degree of 0.04 MPa (0.0085 cm 3 ). Appropriately increasing the negative pressure (from 0.02 MPa to 0.05 MPa) can effectively eliminate dimensional deformation, box collapse, slag inclusion, sand fusion and other defects of castings, shorten casting time and improve casting quality [40].…”

Section: Shrinkage Porosity Simulationmentioning

confidence: 96%

“…Defects such as cracks and shrinkage holes also easily occur during casting production, which restricts its application and promotion to a certain extent [1]. In order to improve the toughness of hypereutectic high-chromium cast iron and improve its comprehensive mechanical properties, domestic and foreign researchers have done a lot of research on refining primary carbides; the main methods include metamorphism and inoculation [2][3][4][5], heat treatment [6][7][8][9][10], pulsed current [11,12] treatment, etc. Previous studies on refining primary carbides of hypereutectic high-chromium cast iron have also been carried out by our research group.…”

Section: Introductionmentioning

confidence: 99%

Study on Simulation of Mold Filling and Solidification Characteristics of Hypereutectic High-Chromium Cast Iron by Lost Foam Suspension Casting

Ma,

2023

Metals

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In this paper, the finite element software ProCAST version 14.5 was used to simulate the temperature field, flow field and defect prediction in the filling and solidification process of hypereutectic high-chromium cast iron. The effects of pouring temperature, negative pressure and the amount of suspension agent added during the technological process were explored. The optimum process parameters were presented. It was found that the suspension agent has a certain hindrance to the filling process, but the filling process remains stable. In the solidification stage, 89.4% of the suspension agent melted, resulting in a relative supercooling degree of 50 °C, which had a certain chilling effect and improved the solidification rate.

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“…In this regard, extensive research is carried out aimed at finding various methods intended to affect the crystallizing metal in order to reduce the size of primary carbide crystals in castings. These methods include the introduction of additives that create additional crystallization centers [26], solid-liquid treatment [27], and high-energy current exposure to the crystallizing metal [28,29]. It is known that the thermal treatment of the melt (TTM) method can affect the structure of castings.…”

Section:  Introductionmentioning

confidence: 99%

Effect of thermal treatment of chromium iron melts on the structure and properties of castings

Panichkin¹,

Wieleba²,

Kenzhegulov³

et al. 2023

Mater. Res. Express

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The article describes the results of experimental studies for the effect of thermal treatment (TTM) of G-X300CrMo27-1 high-chromium cast iron samples in the solid-liquid and liquid state on the structure, phase composition and properties of ingots. For ingots with a carbon content of 2.8 to 4.5 wt.%, cooled at a rate of 3.3 * 10-2 deg/s, the dependencies of the structure, phase composition, composition of primary, eutectic carbides and matrix, hardness HV and microhardness of its individual phases and resistance to abrasive wear from the temperature of isothermal holding at TTM. A significant effect of the TTM temperature of melts on the structure and properties of high-chromium cast iron ingots were detected. The temperatures of inflection on the plotted curves for the characteristics of the structure and properties of the ingots were associated with a phase transition in iron at 1400 0С and with a point on the phase diagram liquidus of the Fe-Cr system. This as well as an increase in the concentration of chromium in the composition of primary carbides with an increase in the TTM temperature up to 1480 0С, made it possible to assume that (Cr, Fe)7C3 clusters stable in composition were formed in the melt of such cast irons below 1500 0С. The reasons for the decrease in the size of primary carbides during G-X300CrMo27-1 molten chromium iron overheating above 1500 0С were substantiated based on these data. During the TTM of fine-crystalline ingots made of hypereutectic cast iron in the temperature range between the liquidus and solidus lines, it was detected that the primary carbides (Cr, Fe)7C3 recrystallized resulting in a significant decrease in the chromium content and an increase in the iron content in them. At the same time, their sizes did not change significantly. Their share increased, and the share of eutectic carbides decreased. Such process also had a significant impact on the properties of the resulting ingots. The most preferable temperatures of hot metal cast irons in the liquid and solid-liquid states were identified based on the results of the studies.

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Effect of TiBAl inoculation and heat treatment on microstructure and mechanical properties of hypereutectic high chromium white cast iron

Cited by 22 publications

References 15 publications

Report on use of Inoculants in Missile Application Alloys

Report on use of Inoculants in Missile Application Alloys

Study on Simulation of Mold Filling and Solidification Characteristics of Hypereutectic High-Chromium Cast Iron by Lost Foam Suspension Casting

Effect of thermal treatment of chromium iron melts on the structure and properties of castings

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