PENGARUH VARIASI CUACA TERHADAP KETANGGUHAN HASIL LASAN PADA BAJA KARBON RENDAH

Sari

ABSTRACT

Lately, rain with stronng blowing wind often happen  that causes many baliho and promotion boards destroyed. It is very dangerous and also make traffic jam. To avoid this problem, the construction of the support must use standard materials and procedure. It might be that the welded joint cannot stand against wind load that sometimes are overload. The step of the research were that the welding process were done in the rain condition and no rain condition. The resullt is that the highest tension stress is found when the wwelding process was done at temperature of 23 ºC that was 6,4 % higher than the tension stress of the main metal. It might be that the welding process was influenced by the rain water that it caused the growth of perlit were caused by the sprayed of the rain water. The spread of the groth of ferit and perlit did not reach of all weldin arrea, HAZ area and main metal area so that many areas were dominated by ferit. It caused that the hardness tend to be lower than carbon steel welding process at temperature of 29 ºC and 33 ºC.

Key wod : baliho, weather, temperature