Abrasive Wear Resistance of AISI 420 Stainless Steel After Laser Surface Treatment

Larosa, Maria Aparecida; Pinto, Maria Aparecida; Ierardi, Maria Clara Filippini

doi:10.1002/9783527628513.ch84

Cited by 1 publication

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“…Caracterização de Materiais da FEM, na UNICAMP. [Larosa, 2009] O ensaio consiste em uma esfera metálica de aço-inoxidável de 25mm de diâmetro que gira contra a amostra na presença de uma solução abrasiva. A carga normal é aplicada pela esfera contra a amostra através de contra-pesos.…”

Section: Figura 35 -Foto Do Microscópio óPtico -Olympus Gx51 -Labiomec Unicampunclassified

Avaliação comparativa de recobrimentos superficiais para tuchos de válvula através de ensaios de desgaste

Rodrigues¹

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With the intention to evaluate the efficiency of different coatings applied to valve tappets -a component used in combustion engines -was proposed some coatings that was compared to an coating already known by the industry. For the evaluations were performed micro hardness tests, micro abrasive wear tests and studies of the microstructure of the coatings. The coatings studied were: conventional gas nitriding, this one already used by the industry; ionic implantation by plasma immersion (IIPI) of nitrogen; IIPI of nitrogen over the layer already existing of conventional gas nitriding; against a sample that was tested without any layer of coating. The micro abrasive tests were performed in an equipment named ball-on-block, using abrasive solution of silicon carbide (SiC), and varying the normal load from 1, 2 and 3N. The results showed that the conventional gas nitriding performed the highest level of micro hardness on the surface, and also the highest level of micro abrasion wear; this result prevailed in this sample in all the normal load applied. Generally, the sample that obtained the best level of wear, in other words, the lowest worn volume was the sample whithout any coating.

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Section: Figura 35 -Foto Do Microscópio óPtico -Olympus Gx51 -Labiomec Unicampunclassified

Avaliação comparativa de recobrimentos superficiais para tuchos de válvula através de ensaios de desgaste

Rodrigues¹

View full text Add to dashboard Cite

show abstract

Abrasive Wear Resistance of AISI 420 Stainless Steel After Laser Surface Treatment

Cited by 1 publication

References 23 publications

Avaliação comparativa de recobrimentos superficiais para tuchos de válvula através de ensaios de desgaste

Avaliação comparativa de recobrimentos superficiais para tuchos de válvula através de ensaios de desgaste

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