Abstract :
The current development of the automotive industry tends to prioritize
comfort and safety when driving on the road. To realize this, a very good suspension
system is needed for the vehicle. The suspension system serves to dampen vibrations
and dampen the shocks received by the vehicle while on the road. Due to uneven
road surfaces such as potholes and bumpy roads. The vehicle suspension system is
located between the body (frame) and the wheels, consisting of springs. There are
several types of springs used in vehicle suspension systems, namely coil springs,
leaf springs, and torsion bar springs.
The purpose of this research is to find out the bending test results obtained
on the imitation heat treated and original without heat treatment on the car so that
it can be a reference for the automotive world and education.
The bending strength test on metal per leaf which was treated without heat
treatment had the higher strength value, with an average strength value of 152.81
MPa while per leaf treated with heat treatment had an average strength value of
139.88 MPa. Therefore, it can be concluded that heat treatment has not been able
to affect the bending strength because it only slightly affects the constituent
material. From the above results, it was concluded that metal per leaf that has been
heated microscopic testing of metal per leaf obtained from the results of bending
strength samples on metal per leaf that were carried out by heat treatment which
showed less good, due to changes in their structure, so that Ferrite and Martensite
tempers were formed less tightly and failed to spread evenly which caused
martensite tempered to have less persistent and not tough.