Pengaruh Penggunaan Elektroda G-17 dan G-03 terhadap Sifat-Sifat Mekanik pada Lasan Baja Karbon Sedang

Abstract

Welding technique plays an important role in engineering and repair on a construction of metal. Las grafting techniques make construction becomes lighter and simpler in the process pembuatanya. In repairing a construction, welding technique used to fill the holes in the casting, making the hard layer on the surface of the tool, to strengthen the parts that are worn out and so forth. This final project is the result of research on the influence of the electrode using G-17 and G-03 on medium carbon steel. Welding specimens using welding machines Sanjiu Nanton. Furthermore, the results of testing weld mechanical properties, ie tensile test, hardness, impact strength and microstructure. From the results obtained by testing tensile strength of welded joint highest of the group of specimens on the type of electrode G-03 or equal to 6.54% of the raw materials. The highest yield strength occurs at the electrode type G-03, it increased 43.17% from raw materials. Electrode type group G-17 has increased to the raw materials are respectively 37.55% and 32.05%. While the highest level of violence happened in the HAZ region of 274 kg / mm 2 of the variation of electrode type G-17, as seen in the micro structure terihat softer than the variation of the G-03 electrodes. According to the results of this study concluded that the type of electrode structure changes due to cooling and therefore contributes to the strength of the material that is an increase in raw materials