Microstructure and properties of hypereutectic high chromium white cast iron prepared under pressure

Huang, Zhifu; Xing, Jiandong; Gao, Yidan; Cheng, Xiaohua

doi:10.1179/030192310x12706364542821

Cited by 11 publications

(6 citation statements)

References 7 publications

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“…Equation (18) shows the relation among equations (2), (12), (14) and (16), so the standard Gibbs free energy change of equation (2) (J mol 21 ), shown in equation (20), is obtained by equation (19) Eq : (2)~Eq : (12) Equation (21) is the same temperature equation as in the chemical reaction. By combining equations (11), (20) and (21), equation (22), the relation between the solubility of Nb in the melt and the absolute temperature when equation (2) is balanced and the addition amount of Nb was 1?0 wt-%, is obtained.…”

Section: Discussionmentioning

confidence: 99%

“…where D r G W Eq : (12) , D r G W Eq : (14) and D r G W Eq : (16) are the standard Gibbs free energy change of equations ( 12), ( 14) and ( 16) respectively (J mol 21 ). T is absolute temperature (K).…”

Section: Discussion Nbc Particles Precipitation Before Primary Carbidesmentioning

confidence: 99%

Section: Discussion Nbc Particles Precipitation Before Primary Carbidesmentioning

confidence: 99%

“…11,12 Figure 1 shows the preparation process of water quenched samples using this method. Figure 2 shows the optical micrographs at the location of 1 mm below the surface.…”

Section: Methodsmentioning

confidence: 99%

“…Water quenched specimens were obtained using the slope cooling body method. 11,12 Figure 1 shows the preparation process of water quenched samples using this method.…”

Section: Methodsmentioning

confidence: 99%

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Effect of niobium on primary carbides of hypereutectic high chromium cast iron

Xing

Wang

2013

Ironmaking & Steelmaking

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The effect of niobium on the primary M 7 C 3 carbides of a hypereutectic high chromium cast iron containing 4?0 wt-%C and 20?0 wt-%Cr was studied by means of optical microscopy, scanning electron microscope, X-ray diffraction, water quenching, and energy dispersive X-ray spectrometry. The primary carbides were refined as niobium content increased. Theoretical calculation and the experimental results indicate that NbC particles form before the precipitation of primary carbides when niobium is added to the alloy. The first precipitated NbC particles lead to a reduction of the hypereutectic degree and the solidification temperature range of the alloy and, therefore, lead to finer hypereutectic primary carbides. The first precipitated NbC particles can act as heterogeneous nuclei of the primary M 7 C 3 carbides, which also results in the refinement of the primary carbides.

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Section: Discussionmentioning

confidence: 99%

Section: Discussion Nbc Particles Precipitation Before Primary Carbidesmentioning

confidence: 99%

Section: Discussion Nbc Particles Precipitation Before Primary Carbidesmentioning

confidence: 99%

“…11,12 Figure 1 shows the preparation process of water quenched samples using this method. Figure 2 shows the optical micrographs at the location of 1 mm below the surface.…”

Section: Methodsmentioning

confidence: 99%

“…Water quenched specimens were obtained using the slope cooling body method. 11,12 Figure 1 shows the preparation process of water quenched samples using this method.…”

Section: Methodsmentioning

confidence: 99%

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Effect of niobium on primary carbides of hypereutectic high chromium cast iron

Xing

Wang

2013

Ironmaking & Steelmaking

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Effect of aluminum on the primary carbides of a hypereutectic high chromium cast iron

Xing

Han

Lui

2015

Materialwissenschaft Werkst

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The effect of aluminum on the primary M7C3 carbides of a hypereutectic high chromium cast iron containing 4.0 wt% carbon and 20.0 wt% chromium was studied by means of optical microscopy, scanning electron microscope (SEM), energy dispersive X‐ray spectrometry (EDX), water quenching, and differential thermal analysis (DTA). Compared with specimen without aluminum addition, the primary carbides were all refined when different amount of aluminum was added into the melts, but the primary carbides in specimen with 0.3 wt% aluminum were the finest. With the addition of aluminum, aluminum element enriched at the boundary of primary carbides during solidification and was beneficial for the refinement of primary carbides. However, the increase of primary carbide growth time with the increase aluminum content had adverse effect on the refinement of the primary carbides. The comprehensive influence of those two factors leaded to the result that the primary carbides in specimen 1 with 0.3 wt% aluminum were the finest.

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