PENGARUH VISKOSITAS OLI DAN UDARA SEBAGAI MEDIA PENDINGIN TERHADAP KEKERASAN DAN STRUKTUR MIKRO LASAN PLAT STRIP BAJA KARBON MEDIUM

CHRISTIANTO, ARI (2018) PENGARUH VISKOSITAS OLI DAN UDARA SEBAGAI MEDIA PENDINGIN TERHADAP KEKERASAN DAN STRUKTUR MIKRO LASAN PLAT STRIP BAJA KARBON MEDIUM. Skripsi thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

Welding is a technique of metal grafting by liquefying some of the main metal and filler metal with or without adding metal and producing continuous metal. One of the most common problems in the use of steel as a base of construction is that steel has fragile nature. This study aimed to identity the effect of oil viscosity as a cooling medium to the hardness and microstructure of the welded medium carbon steel strip plate. This research used experimental research method and this research type was quantitative research. To obtain the results on the analysis of hardness and microstructure of medium carbon steels that have processed SMAW welding with the variations of coolant medium, the data obtained were analyzed using descriptive analysis by describing the comparable specimen of the specimens differently during the manufacturing process until the test. The effect of the difference in oil viscosity as a cooling medium can affect the hardness of the material used as a specimen. The test showed an increase in the hardness value of the material used. In the microstructure the oil viscosity difference also caused the existing structure of the raw material changed after welding and also made the new structure

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