STUDI LITERATUR PENGARUH PARAMETER PENGELASAN TERHADAP SIFAT FISIK DAN MEKANIK PADA LAS TITIK (RESISTANCE SPOT WELDING)
ABSTRACT: Resistance spot
welding (RSW) is the most widely used for joining thin sheet metals in
automotive industry. Various applications of dissimilar materials and
thicknesses were commonly found in many spot welding processes especially in
the manufacture of car body. The resistance spot welding of dissimilar
materials are generally more challenge than similar materials due to differences
in the physical, chemical, and mechanical properties of the base metals.
Differences of materials have an impact on heat input generated at the spot
welding. Diameter of the weld nugget size is influenced by several parameters
such as electric current, welding time, different types of material, and the
thickness of the plate. Nugget diameter will influence on physical and
mechanical properties weld such as microstructure, shear strength and hardness.
For practical use, various industrial standards have recommended a minimum weld
size for a given sheet thickness, mostly in the form of tables. For example the
American Welding Society (AWS), Society of Automotive Engineering (SAE) and the
American National Standards Institute (ANSI). They were only suitable to be
apllied on the similar metal and thickness joint because in this joint,
symetrical nugget will be formed. Meanwhile a type of dissimilar metal that
joined by spot welding method will result in the asymetrical nugget. This paper
aims to review the results of researchs on the similar and dissimilar
resistance spot welded joint to evaluate the use of similar metals weld
parameters and standards on the dissimilar metals weld. It was determined that
parameters welding such as electric current, welding time, and the standard for
similar metals weld can not be applied on the dissimilar metals weld. The
asymetrical nugget shape decreased shear strength on the weld nugget. The most
important factor that was considered on the dissimilar metals weld to make high
quality weld joint was nugget diameter. If the nugget diameter weld increased
the strength of welding will increase.
Penulis: HAIKAL, TRIYONO
Kode Jurnal: jptmesindd130158
