Putra, Herdiansyah
(2019)
Pengaruh Media Pendingin Sesudah Pengelasan Terhadap Sifat Mekanis Stainless Steel 316.
Other thesis, Universitas Islam Riau.
Abstract
One use of stainless steel 316 as a heat exchanger to heat crude oil that would be processed later by destilation. SS 316 is widely used due to corrosion resilience and strength better than carbon steel and cast iron, thus reducing maintenance costs. On the 316 stainless steel field application would experience welding to connect shell parts to the heat exchanger, but in the welding process there would be heat treatment and cause a mechanical downturn in SS 316. The research aims to get the influence of cooling media after welding against the mechanical nature of stainless steel 316. In this study, Shield Metal Arc welding was done on a SS 316 metal with type of electrode (E316-16) and a cooling medium after that weld is in variation which are free air, water and oil. After the welding process was done recitation tests, violence and metallurgical observations. The result of this study the voltage of drag results of SS 316 fixed rate with a contrasting cooling medium has the highest tension value of 576,39 MPa, whereas air conditioning media has the lowest draw value is 569,47 MPa. The highest value of violence in the weld metal area and HAZ is at 134,4 HV for weld metal area and 141,5 HV HAZ area, and the lowest rate of violence at weld metal and HAZ at 121,6 HV for weld metal, and 135,7 for HAZ. Microstructure photographs for nonwelding specimens of austenite and delta ferrite. Whereas microstructures for adhesion with variations in cooling media in austenite and delta ferrite but there is a huge difference in the grains and the boundary of the HAZ region as well as the presence of chrome carbide deposit at the grain limit. The cooling media which has the good mechanical properties of three cooling media is water which show high tensile stress results, high hardness value and chrome carbide deposition at slightly grain boundaries.
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