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EFEK PREHEATING TERHADAP DISTORSI SAMBUNGAN LAS DISSIMILAR PLAT SS400 DAN SS304 MENGGUNAKAN METODE SMAW

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Dissimilar metal welding between low carbon steel SS400 and stainless steel SS304 is widely applied in industrial applications due to its ability to combine different mechanical properties and corrosion resistance. However, differences in thermal properties, coefficients of thermal expansion, and thermal conductivity often result in high distortion and residual stress in welded joints. One commonly applied method to control these issues is preheating prior to welding. This study aims to analyze the effect of preheating temperature variations on the distortion of dissimilar welded joints between SS400 and SS304 using the Shielded Metal Arc Welding (SMAW) method. The materials were joined in a fillet joint configuration under non-preheated conditions and several preheating temperature levels, while the welding current was maintained constant. The research methods included angular distortion measurement, Vickers hardness testing, and macro- and microstructural observations in the weld metal, Heat Affected Zone (HAZ), and base metals. The results show that increasing the preheating temperature significantly reduces angular distortion due to a decrease in temperature gradients and a more controlled cooling rate. The hardness distribution becomes more uniform, particularly in the HAZ of SS400. Microstructural observations indicate that preheating stabilizes microstructural changes caused by the welding thermal cycle. Therefore, the application of appropriate preheating temperatures can improve the quality of dissimilar welded joints between SS400 and SS304.

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Detail Information

Series Title

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Call Number

T1914382025

Publisher

Indralaya : Prodi Teknik Mesin, Fakultas Teknik Universitas Sriwijaya., 2025

Collation

xxxiii, 82 hlm.; ilus.; 29 cm

Language

Indonesia

ISBN/ISSN

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Classification

671.521 207

Content Type

Text

Media Type

unmediated

Carrier Type

-

Edition

-

Subject(s)

Prodi Teknik Mesin
Metalworking — Pengelasan Busur Listrik

Specific Detail Info

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Statement of Responsibility

KA

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