Mechanical Properties of Vermicular Graphite Cast Iron Processed by Selective Laser Surface Alloying with Ultra-fine ZrO2 Ceramic Particulates

Lin, Pengyu; Zhang, Zhihui; Kong, Shuhua; Zhou, Hong; Liang, Yunhong; Tong, Xin; Liu, Ren

doi:10.1007/s40195-016-0446-6

Cited by 7 publications

(3 citation statements)

References 29 publications

(47 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a consequence, much emphasis has been early and currently placed on the improvement of wear performances of the working surface of machine parts made of the DCIs [6][7][8][9][10][11][12][13]. Considerable research has been devoted to laser surface modification methods, such as laser surface melting (LSM), alloying (LSA) and cladding (LSC) processes [14][15][16][17][18][19][20][21][22][23][24]. The LSA process is the most innovative approach to the enhancement of wear properties of the working surface of components made of different cast iron grades.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of TiC-Reinforced Surface Layers on Ductile Cast Iron Substrate by Laser Surface Alloying

Janicki

2020

SSP

View full text Add to dashboard Cite

This chapter presents a novel method for analysis and optimization of the in-situ formation of TiC-reinforced composite surface layers (TRL) on a ductile cast iron substrate during the laser surface alloying process, combining the experimental approach with the computational thermodynamics. The microstructure of the TRLs has been assessed by light optical microscopy, scanning electron microscopy with energy dispersive spectroscopy and X-ray diffraction. The results of thermodynamic calculations with the Scheil-Gulliver model showed a good agreement with the experimental results, indicating that the actual solidification path for the analyzed Fe-C-Si-Ti alloy systems under the investigated range of laser processing conditions is close to the Scheil-Gulliver assumption.

show abstract

Section: Introductionmentioning

confidence: 99%

Fabrication of TiC-Reinforced Surface Layers on Ductile Cast Iron Substrate by Laser Surface Alloying

Janicki

2020

SSP

View full text Add to dashboard Cite

show abstract

“…Recently, there has been growing interest in the application of surface modification methods to increase the wear resistance of the ductile cast iron (DCI) [1,2]. Considerable research has been devoted to laser surface modification methods, such as laser surface melting (LSM) and alloying (LSA) processes [3,4].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Sliding Wear Behaviour of In-Situ TiC-Reinforced Composite Surface Layers Fabricated on Ductile Cast Iron by Laser Alloying

Janicki

2018

Materials

View full text Add to dashboard Cite

TiC-reinforced composite surface layers (TRLs) on a ductile cast iron EN-GJS-700-2 grade (DCI) substrate were synthesized using a diode laser surface alloying with a direct injection of titanium powder into the molten pool. The experimental results were compared with thermodynamic calculations. The TRLs having a uniform distribution of the TiC particles and their fraction up to 15.4 vol % were achieved. With increasing titanium concentration in the molten pool, fractions of TiC and retained austenite increase and the shape of TiC particles changes from cubic to dendritic form. At the same time, the cementite fraction decreases, lowering the overall hardness of the TRL. A good agreement between experimental and calculated results was achieved. Comparative dry sliding wear tests between the as-received DCI, the TRLs and also laser surface melted layers (SMLs) have been performed following the ASTM G 99 standard test method under contact pressures of 2.12 and 4.25 MPa. For both the as-received DCI and the SMLs, the wear rates increased with increasing contact pressure. The TRLs exhibited a significantly higher wear resistance than the others, which was found to be load independent.

show abstract

“…This process involves rapid solidification and cooling, and it provides a unique opportunity to synthesize non-equilibrium structures [6,7]. Additionally, compared with other laser surface modification methods, such as laser surface alloying and cladding processes, LSM is a relatively simple process since it does not change the chemical composition of the processed surface layer [8][9][10]. However, the inability to change the chemical composition of the melt also significantly limits the ability to change the microstructure and mechanical properties of the processed surface layer [11].…”

Section: Introductionmentioning

confidence: 99%

Influence of Solidification Conditions on the Microstructure of Laser-Surface-Melted Ductile Cast Iron

et al. 2020

View full text Add to dashboard Cite

The thermal conditions in the molten pool during the laser surface melting of ductile cast iron EN-GJS-700-2 were estimated by using infrared thermography and thermocouple measurements. The thermal data were then correlated with the microstructure of the melted zone. Additionally, the thermodynamic calculations of a Fe-C-Si alloy system were performed to predict the solidification path of the melted zone. It was found that increasing the cooling rate during solidification of the refined ledeburite eutectic but also suppressed the martensitic transformation. A continuous network of plate-like secondary cementite precipitates and nanometric spherical precipitates of tertiary cementite were observed in regions of primary and eutectic austenite. The solidification of the melted zone terminated with the Liquid → γ-Fe + Fe3C + Fe8Si2C reaction. The hardness of the melted zone was affected by both the fraction of the retained austenite and the morphology of the ledeburite eutectic.

show abstract

Mechanical Properties of Vermicular Graphite Cast Iron Processed by Selective Laser Surface Alloying with Ultra-fine ZrO2 Ceramic Particulates

Cited by 7 publications

References 29 publications

Fabrication of TiC-Reinforced Surface Layers on Ductile Cast Iron Substrate by Laser Surface Alloying

Fabrication of TiC-Reinforced Surface Layers on Ductile Cast Iron Substrate by Laser Surface Alloying

Microstructure and Sliding Wear Behaviour of In-Situ TiC-Reinforced Composite Surface Layers Fabricated on Ductile Cast Iron by Laser Alloying

Influence of Solidification Conditions on the Microstructure of Laser-Surface-Melted Ductile Cast Iron

Contact Info

Product

Resources

About