FADHILLA, PANJI RAKHA (2023) ANALISIS VARIASI SUDUT KAMPUH DAN KEKUATAN HASIL SAMBUNGAN LAS GMAW ( GAS METAL ARC WELDING ) SS400 BAJA KARBON TINGGI PADA KOMPONEN REAR FRAME MOTOR GRADER. S1 thesis, Universitas Mercu Buana Bekasi.
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Abstract
ABSTRAK Rear frame motor grader mencakup susunan pemasangan ripper terletak di ujung belakang bagian belakang setiap lengan. Bemper ditempatkan secara lateral sehubungan dengan bidang tengah dan dipasang dengan kaku pada posisi di bagian belakang setiap lengan yang terletak berdekatan dengan ujung belakang bagian belakang setiap lengan. Pengelasan pada penelitian ini dengan las listrik menggunakan pesawat las listrik Gas Metal Arc Welding (GMAW). Pengelasan pada material rear frame harus maximal karena sambungan las pada rear frame akan sangat berbahaya apabila sambungannya tidak kuat dan akan membahayakan pada saat penggunaannya. Penelitian ini bertujuan untuk mengetahui variasi sudut kampuh dan kekuatan hasil sambungan las pada variasi sudut kampuh yang berbeda. Spesimen dilakukan pengujian tarik, macro examination dan Non Destructive Test. Berdasarkan hasil uji tarik untuk masing-masing sudut dengan cara mencari nilai rata-rata hasil pengujian tarik. Dari hasil analisis tiap sudut, nilai kuat tarik untuk kelompok sudut 30° paling rendah yaitu 363,3 MPa dan kuat luluh sebesar 228 MPa. Untuk nilai kekuatan tarik tertinggi pada sudut kampuh 50° 453 Mpa dan kekuatan luluh pada sudut kampuh 40° 336,3 Mpa. Dari Sembilan hasil pengujian macro examination hanya 1 spesimen yang terindikasi terjadinya cacat yaitu spesimen M1 terjadi cacat porosity yang disebabkan karena elektroda yang lembap, dan untuk kedelapan spesimen yang lain tidak ditemukan adanya retakan (crack) pada sambungan las spesimen uji Non Destructive Test. Dan untuk variasi sudut kampuh yang paling optimal pada penelitian ini adalah dengan variasi sudut kampuh 50°. Kata kunci : Motor Grader, Pengelasan GMAW, Macro Examination, Pengujian tarik, Non Destructive Test ABSTRACT The rear frame motor grader includes a ripper mounting arrangement located at the rear end of the rear of each arm. The bumpers are positioned laterally with respect to the center plane and are fixed rigidly in position at the rear of each arm adjacent to the rear end of each arm. Welding in this study was by electric welding using a Gas Metal Arc Welding (GMAW) electric welding machine. Welding on the rear frame material, it must be maximal because the welding joints on the rear frame will be very dangerous if the joints are not strong and will be dangerous when used. This study aims to determine the variation of the seam angle and the resulting strength of the welded joints at different seam angle variations. The specimens were subjected to tensile testing, macro examination and Non Destructive Test. Based on the results of the tensile test for each corner by finding the average value of the tensile strength test results. From the results of the analysis of each angle, the value of the tensile strength for the 30° angle group is the lowest, namely 363.3 MPa and the yield strength is 228 MPa. For the highest value of tensile strength at seam angle 50° 453 Mpa and yield strength at seam angle 40° 336.3 Mpa. Of the nine macro examination results, only 1 specimen indicated a defect, namely specimen M1 had a porosity defect caused by a damp electrode, and for the other eight specimens no cracks were found in the welded joints of the Non Destructive Test specimens. And for the most optimal variation of seam angle in this study is the variation of seam angle of 50°. Keywords : Motor Grader, GMAW Welding, Macro Examination, Tensile Test, Non Destructive Test
| Item Type: | Thesis (S1) |
|---|---|
| Call Number CD: | FT/MSN 23 013 |
| NIM/NIDN Creators: | 41318310066 |
| Uncontrolled Keywords: | Motor Grader, Pengelasan GMAW, Macro Examination, Pengujian tarik, Non Destructive Test |
| Subjects: | 600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 621 Applied Physics/Fisika terapan > 621.8 Machine Engineering, Machinery/Teknik Mesin |
| Divisions: | Fakultas Teknik > Teknik Mesin |
| Depositing User: | siti maisyaroh |
| Date Deposited: | 16 May 2023 04:57 |
| Last Modified: | 16 May 2023 04:57 |
| URI: | http://repository.mercubuana.ac.id/id/eprint/77158 |
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