Análisis de la resistencia al desgaste abrasivo del acero al carbono ASTM A-36 y del AISI 1045, con tratamiento superficial, para utilizar en la reparación de cucharones de retroexcavadoras

Abstract

This experimental work aims to evaluate abrasive wear resistance according to ASTM G 65, to carry out this analysis were manufactured specimens of ASTM A-36 and AISI 1045 steels of 25.4x72x12.5 mm with cementation and nitriding. The cementing process consisted of placing the steels in a cast iron box in the oven at a temperature of 950 degrees Celsius for 8 hours, the tempering was performed at the temperature of 880 degrees Celsius quickly cooled in water and finally realized or the tempering at temperatures of 200 degrees Celsius. Nitriding consisted of incorporating nitrogen into the surface of steel composed mainly by ferritic phase, by heating in an ammonia atmosphere at a temperature of 500 degrees Celsius, for 15 hours to achieve a layer of depth nitriding. The hardness results obtained by ASTM A-36 steel with cementation is 484 HB and with nitriding is 151 HB, in AISI 1045 steel with cementation is 586 HB, and with nitriration is 178 HB, in the abrasive wear test a vol loss comparison was made umetrics between surface-treated steels and anti-abrasion steel as this material is used in the construction of backhoe buckets, obtaining results that wear is less on cemented steels, anti-abrasion steel, but is greater steels with nitriding treatment.