Laser Processing of Cast Iron for Enhanced Erosion Resistance

Chen, C. H.; Altstetter, C. J.; Rigsbee, J. M.

doi:10.1007/bf02644203

Cited by 71 publications

(21 citation statements)

References 10 publications

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“…The formation of a large account of carbides or eutectic cementite during subsequent rapid solidification is the major cause of the hardening. For the improvement of wear resistance, Rigsbee and coworkers 5) have shown that a laser surface remelted layer can improve the erosion resistance of SG cast iron. However, this experimental result was based only on certain oblique impact conditions.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Features and Erosion Wear Resistance of Friction Stir Surface Hardened Spheroidal Graphite Cast Iron

2012

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A ferritic spheroidal graphite cast iron (also named as SG cast iron, ductile cast iron, ductile iron) was treated with friction stir process (FSP) to harden the surface layer owing to a unique microstructure into which the ferritic structure transforms after high temperature deformation and subsequent direct cooling. When the friction stirred surface experiences thermomechanical cycle during FSP (here named friction stir surface hardening, FSSH), a non-traditional bainite structure can be obtained through subsequent cooling process. The bainite structure primarily consists of iron carbide (Fe 3 C), acicular ferrite and martensite with retained austenite aggregates. It is evident that the FSSH structure caused by deformation at austenite temperature has resulted in a significant increase in the microhardness of about 1000 HV yielding a primarily martensitic accompanying bainitic phase transformation. The experimental results also show that the process has resulted in significant improvement in erosion resistance at low angle impingement than that of ferritic specimens. In addition, the maximum erosion rate of ferritic specimens occurs at 2025°of impact while the peak of the FSSH specimen shifts to higher angle resulting from the formation of continuously cooled martensitic and bainitic structure.

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Section: Introductionmentioning

confidence: 99%

Microstructural Features and Erosion Wear Resistance of Friction Stir Surface Hardened Spheroidal Graphite Cast Iron

2012

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“…As to the laser surface modification of ductile iron, laser transformation hardening and laser remelting are the main laser processing methods in practical applications. In transformation hardening in the solid state by laser processing, ductile iron is hardened to obtain a martensitic structure [4], and laser remelting of ductile iron often produces an ultrafine ledeburitic hard surface layer [5][6][7]. It is noting that the significant improvement in wear resistance by laser surface remelting is at the expense of the excellent self-lubricant, damping properties of graphite, which are equally as important as the abrasive wear properties in some service conditions [8].…”

Section: Introductionmentioning

confidence: 99%

Laser surface modified ductile iron by pulsed Nd:YAG laser beam with two-dimensional array distribution

Chen

Gan

Wang

et al. 2005

Applied Surface Science

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A novel modification layer on the surface of pearlite-ferrite matrix ductile iron was fabricated under irradiation of Nd:YAG laser beam equipped with self-designed diffractive optical element (DOE) which produces a 5 Â 5 two-dimensional array distribution at the focal plane. The microstructure of the layer along the surface and the direction of the layer depth had obvious gradient distribution, and therefore the two-dimensional microhardness map of the layer alternated higher hardness with lower hardness. The results showed that the novel modification layer is expected to have excellent combination of strength and toughness. #

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“…Ductile iron (DI) and austempered ductile iron (ADI) are ferrous alloys, being widely used in the manufacturing of machine tool beds, cams, pistons, cylinders, etc., because of their low cost and properties like low melting point, good fluidity and cast-ability, excellent machinability, good wear resistance and good mechanical strength [1]. However, under severe service conditions their uses are very limited due to erosion.…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution during surface alloying of ductile iron and austempered ductile iron by electron beam melting

Gulzar

Akhter

Ahmad

et al. 2009

Applied Surface Science

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Laser Processing of Cast Iron for Enhanced Erosion Resistance

Cited by 71 publications

References 10 publications

Microstructural Features and Erosion Wear Resistance of Friction Stir Surface Hardened Spheroidal Graphite Cast Iron

Microstructural Features and Erosion Wear Resistance of Friction Stir Surface Hardened Spheroidal Graphite Cast Iron

Laser surface modified ductile iron by pulsed Nd:YAG laser beam with two-dimensional array distribution

Microstructure evolution during surface alloying of ductile iron and austempered ductile iron by electron beam melting

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