THE EFFECT OF STRESS RELIEF ANNEALING PROCESS ON SWITCH ROD OF TURNOUT IN RAILWAY INDUSTRY
The manufacturing process in the manufacture of metal components usually produces side effects such as residual stress. The presence of residual stress in a component can affect the formation of crack initiation. In the case of a railway company, fatigue failure occurred at the threaded base of t...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/68299 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The manufacturing process in the manufacture of metal components
usually produces side effects such as residual stress. The presence of residual
stress in a component can affect the formation of crack initiation. In the case of
a railway company, fatigue failure occurred at the threaded base of the switch rod
of turnout. It is suspected that the failure was caused by the presence of residual
stresses from the component manufacturing process. In this study, two samples
of handlebar parts from different vendors were used. The stress relief annealing
treatment process was carried out with temperature variations of 520 oC, 560 oC,
600 oC, 640 oC, 680 oC with holding times of 30 minutes and 60 minutes.
Furthermore, the residual stress measurement test was carried out using the Xray
mode cos a method, hardness testing using the Vickers method and
metallography using a light optical microscope. The test results show that there
is tensile residual stress on the neck of the machining process near the thread.
The stress relief process carried out success in reducing the tensile residual stress
in the section, accompanied by a decrease in hardness and insignificant grain
enlargement.
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