EVALUASI MIKROSTRUKTUR DAN SIFAT MEKANIK HASIL PENGELASAN SMAW PADA HOLLOW ST37 UNTUK APLIKASI RANGKA OTOMOTIF

Authors

  • Yusuf Subagyo Politeknik Negeri Semarang
  • Sendie Yuliarto Margen
  • Sahal Ahmad Albab
  • Baharudin Priwintoko
  • Ibnu Rosyid Al Hassany
  • Arif Syamsudin
  • Yuris Bahadur Wirawan

DOI:

https://doi.org/10.32497/orbith.v21i3.7167

Keywords:

SMAW, ST37, Brinell, Liquid Penetrant Testing, Struktur Mikro

Abstract

Penelitian ini menganalisis hasil pengelasan Shielded Metal Arc Welding (SMAW) pada baja karbon rendah hollow ST37, yang digunakan sebagai rangka sistem pengisian baterai. Studi ini bertujuan menilai kekerasan las, cacat, dan karakteristik mikrostruktur sambungan las. Pengujian meliputi pengukuran kekerasan Brinell, Liquid Penetrant Testing (LPT), dan foto mikro.Hasil menunjukkan kekerasan rata-rata 66,42 HB, masih dalam kisaran baja karbon rendah, mengindikasikan tidak ada pembentukan martensit yang signifikan. LPT mengidentifikasi cacat permukaan berupa porosity dan undercut. Analisis mikrostruktur menentukan total lebar pengaruh panas 5,4 mm. Zona Terpengaruh Panas (HAZ) menunjukkan pertumbuhan butir akibat efek termal, sementara zona fusi memiliki struktur yang lebih kasar dan getas. Disimpulkan bahwa parameter pengelasan yang digunakan stabil dan sesuai untuk material hollow ST37.

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Published

2025-11-30

Issue

Vol. 21 No. 3 (2025): November 2025

Section

Engineering Articles

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