DefinePK

Abstract

Excavator is heavy equipment used in construction, agriculture and forestry industries. Excavator has a primary function for digging and loading some materials, for instance rocky soil and others. Excavator has 3 sections consisting of attachment, base frame, and undercarriage. One section of undercarriage excavator that mostly needs routine maintenance is track shoe. Track shoe is the crawler or the outer wheel of excavator that serves as the motor of excavator. This section is always in direct contact with the soil which leads to wear. This research discussed the comparison of track shoe material before heat treatment and after heat treatment using quenching with oil media. The material was AISI 1526. The analysis conducted was micrographic test in which non-heat-treatment material went to ferrite and pearlite phases, while heat-treatment material turned into martensite phase. Hardness testing on non-heat-treatment material was 41 HRC, while heat-treatment material was 45.3 HRC. Wear testing on non-heat-treatment material was 1.28mm3/day, while heat-treatment material was 1.12mm3/day. Non-heat-treatment material had wear rate value of 0.51 mm/yr and heat-treatment material had 0.34 mm/yr. Microstructure testing of the sample was conducted by using optical microscope, hardness testing of the sample used Rockwell Hardness Tester, wear testing used Ogoshi High Speed Universal Wear Method, and corrosion testing used potentiodynamic polarization method. From the analysis results, hardness value was inversely proportional to wear and corrosion values; the harder the material, the smaller the wear rate.