Procedia structural integrity | 2019
Effect of tempering temperature and time on microstructure and mechanical properties of 26MnB5 martensitic steel tubes
Abstract
Abstract Anti-roll bar, sway or stabilizer bar, is a part of automobile suspension system. It connects the right and left of the vehicle and resists swaying of the vehicle in sharp curves or road irregularities. This tubular component undergoes fatigue failure during service. In the current paper, the effect of tempering temperature and tempering time on fatigue properties of 26MnB5 steel is discussed. The electric resistance welded tubes made of 26MnB5 were hardened above Ac3 temperature in a sealed quench furnace. The tempering is done at 400°C, 450°C, 500°C for 15, 30 and 60 minutes. The microstructure and the mechanical properties have been analyzed by means of optical microscopy, hardness testing and tensile tests. The tubes were then bent to shape and tested for fatigue. In this paper, the effect of tempering temperature and tempering time on microstructure and mechanical properties are discussed and compared with the fatigue properties of the component.