Análisis de los parámetros de un sistema mecánico PIN ON DISK BAJO NORMA ASTM G-99 entre ACERO AISI 1018 y el relleno de soldadura SMAW con electrodo AWS ENi-CI sobre hierro fundido nodular y su influencia en el desgaste

Abstract

In the present experimental work the analysis of the parameters of a Pin on Disk mechanical system (load, speed, distance of travel, temperature, material, lubrication and atmospheric environment) was carried out under the ASTM G-99 Standard between the AISI 1018 Steel and the SMAW welding filler with AWS ENi-CI electrode on nodular cast iron and its influence on wear, the volumetric loss, wear rate, wear coefficient and the difference in mass lost in these two materials was evaluated, both in the conditions of pins as disks using the equation established in clause 9.1 of the ASTM G-99 Standard. To achieve these objectives, adhesive wear tests were carried out with Nodular Cast Iron pins on AISI 1018 steel discs and AISI 1018 steel pins on nodular cast iron discs, to obtain real data on the wear rate between these two materials. and compare them with the wear rate of the pins with SMAW welding filler and AWS ENi-CI electrode in nodular cast iron on AISI 1018 steel discs and AISI 1018 steel pins on the SMAW welding filler with AWS ENi-CI electrode in nodular cast iron using the Pin on Disk tribometer. The parameters selected to develop the test were applying a load of 117.6N and 147N for the travel distances of 205m, 500m, 750m and 1000m. The pins were 10mm in diameter and 45mm in length, while the dimensions of the nodular cast iron discs were 100mm in diameter and 4mm thick; For AISI 1018 steel discs they were set with 100mm diameter and 10mm thickness. The specimens were sanded and polished to a roughness of 0.8μm, required by the ASTM G-99 Standard, in the case of the SMAW welding filler, the commercial electrode MG 250 ENi-CI was machinable. To carry out the SMAW process, a Miller 250 DX welder was used and a matrix built with steel plates A36 of 10mm thickness to avoid the expansion of the cast iron discs, an undercut was made for a better penetration of the SMAW deposit.