Effect of laser melting processing on the microstructure and wear resistance of gray cast iron

Lian, Shengjiang; Chenglao, LI

doi:10.1016/0043-1648(91)90129-i

Cited by 22 publications

(8 citation statements)

References 4 publications

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“…Microstructures were classified as, Zone I, Zone II, Zone II, Zone IV, Zone V and Zone VI. Zone I was austenitic microstructure with undissolved flake graphite [10,32]. The microstructure was pearlite with graphite flake [12] for Zone II.…”

Section: Resultsmentioning

confidence: 99%

“…Homogeneous and austenitic microstructures had higher corrosion resistance than heterogeneous surfaces [8,9]. Austenitic and martensitic microstructures present high hardness while pearlite and ferrite microstructure are weaker [4,6,7,10]. Wear resistance is high in mixed structure consisted of austenitic matrix with martensitic particles [10].…”

Section: Introductionmentioning

confidence: 96%

“…Austenitic and martensitic microstructures present high hardness while pearlite and ferrite microstructure are weaker [4,6,7,10]. Wear resistance is high in mixed structure consisted of austenitic matrix with martensitic particles [10]. Thus, the modification or design of the microstructure can improve the hardness, corrosion, wear and friction resistance of the grey cast iron.…”

Section: Introductionmentioning

confidence: 99%

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Microstructural Design of the Cast Iron via Laser Hardening with Defocused Beam of the Continuous Wave CO2 Laser

Ahuir-Torres

Sharp

Bakradze

et al. 2022

J. Phys.: Conf. Ser.

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The cast iron is widely used in mechanical parts due to its good properties, as damping, good fluidity, resistance to deformation, excellent machinability and low cost. However, the number of its applications are reduced because its low corrosion, wear and friction resistance. The microstructure of the metallic materials has high influence on these properties. Laser hardening can improve these properties via designing of the microstructure. The evaluation of the laser parameter influence on the microstructural features is vital for a correct design of the microstructure and therefore, good improvement of the metallic material properties. Although the various laser parameter influence has been analysed on sundry papers, the influence of the distance from focal point and scan speed in the laser hardening microstructures has been rarely evaluated in the literature. Thus, the influence of this parameter on the microstructures generated through laser hardening is the subject matter of this work. The experiments were carried out with continuous wave carbon dioxide laser on samples of ground cast iron. The atmosphere was air flow at 0.7MPa, the laser operated at 100W and the scan rates were 1mm/s and 5mm/s. The distances to focal point of the laser beams ranged from 0.0mm to 5.6mm. The microstructures of the samples were revealed via nital and evaluated with optical microscopy. This work shown that the microstructure of gray iron cast can be designed by mean of laser hardening. In addition, laser hardened zones had various microstructures (e.g. austenitic, martensitic, pearlite and dendritic). The type of the microstructures in laser treated zones was determined by distance from focal point and scan speed. Moreover, the width and the depth of the laser hardened zones were generally enlarged with the increasing of the distance from focal point. Furthermore, the laser irradiation at slow rates, i.e. 1mm/s, produced laser hardened zones larger than laser scan at 5mm/s. In future works, the hardness, wear and friction resistance of the laser hardened samples will be evaluated because the literature review indicates that austenitic and martensitic microstructures show high values of these properties.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microstructural Design of the Cast Iron via Laser Hardening with Defocused Beam of the Continuous Wave CO2 Laser

Ahuir-Torres

Sharp

Bakradze

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…is the peak position of diffraction line, and the X-ray diffraction peaks broadening means grain size or sub grain size refinement. Owing to the refinement of grains, the better comprehensive properties of material are obtained [21,22].…”

Section: Microstructurementioning

confidence: 99%

Effect of one-step laser processed biomimetic coupling units' degrees on rolling contact fatigue wear resistance of train track alloy steel

Yang

Zhou

Zhang

et al. 2015

Surface and Coatings Technology

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“…Due to the wide application of silicon molybdenum ductile iron in automotive exhaust manifolds, qtrsi4mo, and qtrsi4mo1 have been incorporated into the national standard GB/t 26653-2011. [1][2][3][4][5][6][7][8] is study takes high-silicon-molybdenum ductile iron as the research object, and optimizes the production process of high-silicon molybdenum ductile iron by changing the types of nodularizers, the amount of inoculant added, and the unpacking time and other process factors.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Mechanical Properties of High Silicon Molybdenum Cast Iron Materials: Based on Deep Learning Model

Dong

Zhang

Fan

et al. 2022

Computational Intelligence and Neuroscience

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In the production and life of machines, wear is the main form of material failure. Many workpieces and equipment will produce friction and wear during use, causing energy and material consumption, resulting in huge economic losses. In the process of using engineering equipment, in order to improve the service life of the workpiece and improve the wear-resistant material, the research of the material itself must be closely linked with the wear mechanism. Among the antiwear materials, the application of high-chromium cast iron is the most common. The reason is that high-chromium cast iron has a series of advantages in performance, manufacturing technology, and price. However, high-chromium cast iron itself has high C content and high brittleness, resulting in defects in toughness and poor corrosion resistance. When working in harsh environments such as mechanical extrusion, high-strength wear, and chemical corrosion, cracking and deformation are prone to occur, corrosion and peeling, and another damage failure. High chromium cast iron must have a relatively stable structure, good strength and toughness, excellent wear resistance, and corrosion resistance. In this study, the static corrosion performance of high-chromium cast iron was tested to study the effects of Mo and V elements addition and content changes on corrosion resistance and vanadium, molybdenum, and subcritical treatment processes on the microstructure and properties of high-chromium cast iron, in order to obtain better performance. Lower cost high chromium cast iron castings. As a wear-resistant part, high-chromium cast iron castings are widely used in wear and can cope with harsh working environments, but their excellent hardness conditions bring certain defects in toughness and at the same time lack good corrosion resistance, in mechanical extrusion., high-strength wear, chemical corrosion, and other harsh environments are prone to damage and failure. Therefore, high-chromium cast iron should have dual properties, not only high hardness but also suitable for mud, sand, chemicals, and other media corrosion and wear resistance.

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Effect of laser melting processing on the microstructure and wear resistance of gray cast iron

Cited by 22 publications

References 4 publications

Microstructural Design of the Cast Iron via Laser Hardening with Defocused Beam of the Continuous Wave CO2 Laser

Microstructural Design of the Cast Iron via Laser Hardening with Defocused Beam of the Continuous Wave CO2 Laser

Effect of one-step laser processed biomimetic coupling units' degrees on rolling contact fatigue wear resistance of train track alloy steel

Preparation and Mechanical Properties of High Silicon Molybdenum Cast Iron Materials: Based on Deep Learning Model

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