Effect of cerium modification on microstructure and properties of hypereutectic high chromium cast iron

Xing, Zhi; Liu, Jinzhi; Xing, Jiandong; Ma, Shengqiang

doi:10.1016/j.msea.2014.02.080

Cited by 87 publications

(40 citation statements)

References 19 publications

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“…While position B in Fig. was close to the center of the block, so the chilling effects of sand mold at position B decreased dramatically and rod carbides may appear in the solidification structure at position B . 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 2 with 0.3 wt% aluminum was the finest, Fig.…”

Section: Resultsmentioning

confidence: 95%

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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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Section: Resultsmentioning

confidence: 95%

“…Position A in Fig. was 1 mm under the specimen surface, so the solidification structure at position A was fine equiaxed grain due to the chilling effects of sand mold . While position B in Fig.…”

Section: Resultsmentioning

confidence: 99%

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

Xing

Han

Lui

2015

Materialwissenschaft Werkst

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“…18) In hypereutectic high chromium cast iron, the carbides were refined gradually and the morphology of primary M 7 C 3 type carbides became more isotropic as cerium addition increases, but rather slowly when cerium addition exceeded 1.0%. 19) However, there is no published literature available on the effect of Ce on microstructure of ADI except it was reported that Ce decreased the graphite nodularity, delayed the completion of stage I reaction and accelerated the start of the stage II reaction without discussing on microstructural aspects. 20) The variation in optimum Ce content reported by previous investigators appears to be associated with different composition of DI used which could modify liquidus temperature.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Study for Optimization of Ce Content of Austempered Ductile Iron (ADI) Weld Metal

Sarkar

Pal

2019

ISIJ Int.

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Bead-on-plate welding was performed on 20 mm thick cast ductile iron plate in shielded metal arc welding using three different levels (0.05, 0.1, 0.2%) of Ce and one without Ce containing developed coated electrodes after establishing weld procedure as per AWS (D11). As-welded DI weldments were given isothermal heat treatment at two different austempering temperatures (300°C and 350°C) for 1.5 h, 2 h and 2.5 h holding time. Microstructures of as-deposited and austempered weld metals were characterized by OM, SEM, TEM, XRD analysis and microhardness testing. Results show that weld metal containing 0.1% Ce attributed lowest amount of ledeburitic carbide in as-deposited condition and maximum vol.% of retained austenite (46.7%) after austempering heat treatment compare to other two levels of Ce. Since maximum amount of retained austenite is the desirable microstructure after austempering heat treatment, 0.1% Ce is considered as the optimum one in DI weld metal.

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“…In recent years, it is one of the main ways that the additional elements are doped into steels to improve their mechanical properties [15][16][17]. Meanwhile the introduction of additional elements also has an impact on the austenitization process.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of the austenitization in the Fe-Mo-C ternary alloys during continuous heating

Kong

Liu

et al. 2016

Open Physics

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Abstract:The influence of molybdenum on the microstructure and kinetics of the austenization of the Fe-Mo-C ternary alloys is analyzed using differential scanning calorimetry (DSC) and the Johnson-Mehl-AvramiKolmogorov model (JMAK) in the temperature range from 293 K to 1373 K. The as-cast microstructure and microstructure after DSC test are obtained using optical microscopy (OM) and scanning electron microscopy (SEM). It was seen that with an increasing Mo concentration, the lamellar pearlite is spherized and the austenite grain size decreases. In addition, both DSC curves and the JMAK model show that the initial (Ac1) and the final (Ac3) temperature of the phase transition increases with an increasing Mo concentration. It was also seen that increasing the Mo concentration, the diffusion activation energy (DAE) increases and the pre-exponential factor of diffusion (DPEF) decreases due to a change in both the austenitic nucleation rate and the diffusion of the elements caused by the introduction of Mo.

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Effect of cerium modification on microstructure and properties of hypereutectic high chromium cast iron

Cited by 87 publications

References 19 publications

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

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

Microstructural Study for Optimization of Ce Content of Austempered Ductile Iron (ADI) Weld Metal

Kinetics of the austenitization in the Fe-Mo-C ternary alloys during continuous heating

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