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PENGARUH PENAMBAHAN FLUX AKTIF (TiO2)
TERHADAP HASIL KEKERASAN PENGELASAN
FCAW PADA MATERIAL BAJA A 36
Skripsi
Diajukan Kepada Universitas Muhammadiyah Malang
Untuk Memenuhi Salah Satu Persyaratan Akademik
Dalam Menyelesaikan Program Sarjana Teknik
Disusun Oleh :
NAILURRAHMAN
201510120311099
JURUSAN TEKNIK MESIN
FAKULTAS TEKNIK
UNIVERSITAS MUHAMMADIYAH MALANG
2020
vii
DAFTAR ISI
COVER ................................................................................................................... i
POSTER ................................................................................................................. ii
LEMBAR PENGESAHAN SKRIPSI .............................................................. iii
TANDA TANGAN BERITA ACARA BIMBINGAN ..................................... iv
SURAT PERNYATAAN KEASLIAN ............................................................. vi
ABSTRAK ........................................................................................................ vii
ABSTRACK .................................................................................................... viii
KATA PENGANTAR ....................................................................................... ix
DAFTAR ISI .................................................................................................... xii
DAFTAR TABEL ........................................................................................... xiv
DAFTAR GAMBAR ........................................................................................ xv
BAB I PENDAHULUAN ................................................................................... 1
1.1 Latar Belakang............................................................................................ 1
1.2 Rumusan Masalah ....................................................................................... 3
1.3 Tujuan Penelitian ........................................................................................ 3
1.4 Batasan Masalah ......................................................................................... 3
1.5 Hipotesa ..................................................................................................... 4
1.6 Metode Penelitian........................................................................................... 4
1.7 Sistematika Penilisan...................................................................................... 5
BAB II LANDASAN TEORI ............................................................................. 7
2.1 Tinjauan Pustaka......................................................................................... 7
2.2 FCAW (Flux Core Art Welding) ............................................................... 10
2.3 Baja ASTM 36 .......................................................................................... 14
2.4 Flux aktif TiO2 .......................................................................................... 16
2.5 Kawat Elektroda ...................................................................................... 17
2.6 Uji Kekerasan ........................................................................................... 19
viii
BAB III METODOLOGI PENELITIAN ....................................................... 24
3.1 Jenis Penelitian ........................................................................................ .24
3.2 Waktu Dan Tempat Penelitian .................................................................. 24
3.3 Alat dan Bahan Penelitian ......................................................................... 24
3.3.1 Bahan ....................................................................................................... 24
3.3.2 Alat .......................................................................................................... 26
3.4 Langkah Penelitian .................................................................................. 31
3.4.1 Tahap Persiapan ........................................................................................... 31
3.5 Proses Pengelasan ........................................................................................ 32
3.6 Analisa Data ................................................................................................ 35
3.7 Diagram Alir ................................................................................................ 36
BAB IV HASIL PENELITIAN DAN PEMBAHASAN .................................. 37
4.1 Proses Pengujian ....................................................................................... 37
4.2.1 Hasil Pengujian Kekerasan Vickers .......................................................... 38
4.3 Pembahasan .............................................................................................. 44
BAB V PENUTUP ........................................................................................... 48
5.1 Kesimpulan............................................................................................... 48
5.2 Saran ........................................................................................................ 48
DAFTAR PUSTAKA ....................................................................................... 49
LAMPIRAN
ix
DAFTAR TABEL
Tabel 2.1 Komposisi Elektroda berdasarkan AWS A5.20 ................................... 17
Tabel 2.2 Skala Kekerasan ................................................................................ 19
Tabel 2.3 Uji Kekeraan Vikers .......................................................................... 22
Tabel 2.4 Skala Kekerasan Rockwell ................................................................ 24
Tabel 4.1 tabel hasil kekerasan pengelasan FCAW tampa TiO2 .......................... 37
Tabel 4.2 tabel hasil kekerasan pengelasan dengan TiO2 0,5 gr .......................... 38
Tabel 4.3 tabel hasil kekerasan pengelasan dengan TiO2 1 gr ............................. 40
Tabel 4.4 tabel hasil kekerasan pengelasan dengan TiO2 1,5 gr .......................... 41
x
DAFTAR GAMBAR
Gambar 2.1 Skema Pengelasan FCAW ............................................................. 10
Gambar 2.2 Posisi Pengelasan Proses ................................................................ 11
Gambar 2.3 Struktur TiO2 ................................................................................. 16
Gambar 2.4 Indentor Uji Vickers ...................................................................... 18
Gambar 2.5 Skema Uji Rockwell ...................................................................... 20
Gambar 2.6 Indentor Uji Brinell ........................................................................ 21
Gambar 3.1 Fluks Aktif TiO2 ............................................................................ 24
Gambar 3.2 Aseton ........................................................................................... 25
Gambar 3.3 Mesin Las FCAW .......................................................................... 25
Gambar 3.4 Alat uji kekerasan vikers ................................................................ 26
Gambar 3.5 Jangka Sorong .............................................................................. 27
Gambar 3.6 Gelas Kimia ................................................................................... 27
G2ambar 3.7 Spatula pengaduk ............................................................................. 27
Gambar 3.8 Timbangan Digital ........................................................................ 28
Gambar 3.9 Gerinda .......................................................................................... 28
Gambar 3.10 Mesin Potong Hidrolik .................................................................. 29
Gambar 3.11 Amplas ........................................................................................ 29
Gambar 3.12 Penjepit Material Saat Pengelasan ..................................................29
Gambar 3.13 Kampuh Join .................................................................................. 31
Gambar 3.14 Proses Pengelasan ...................................................................... ..... 28
Gambar 3.15 Penambahan TiO2 ........................................................................... 32
Gambar 3.16 Hasil Pengamplasan Spesimen ........................................................ 33
Gambar 4.1Kampuh V 30º ................................................................................ 36
Gambar 4.2 Pengambilan Titik Sampel ............................................................. 37
Gambar 4.3 Grafik Hasil Uji Kekerasan .............................................................. .43
Gambar 4.4 Grafik Rata-rata Daerah HAZ, BN,WM........................................... .43
xi
DAFTAR PUSTAKA
[1] Y. M. Zulaida, M. I. Kusuma, and T. Triana, “Pengelasan Flux Core Arc
Welding Untuk Aplikasi Pengelasan Pelat Lambung Kapal,” Tek. J. Sains
dan Teknol., vol. 14, no. 2, p. 119, 2018, doi: 10.36055/tjst.v14i2.5867.
[2] rizky adi susilo, 2019, doi: 10.1017/cbo9780511997976.002.
[3] A. Asfat, “Efek Kecepatan Pengelasan Terhadap Sifat Mekanik Hasil
Pengelasan Fcaw Pada Plat Baja a36,” pp. 1–6, 2017.
[4] H. Wibowo, M. N. Ilman, and P. Tri Iswanto, “Analisa Heat Input
Pengelasan terhadap Distorsi, Struktur Mikro dan Kekuatan Mekanis Baja
A36,” J. Rekayasa Mesin, vol. 7, no. 1, pp. 5–12, 2016, doi:
10.21776/ub.jrm.2016.007.01.2.
[5] A. Ardiansah, “STUDI HASIL PROSES PENGELASAN FCAW ( Flux
Cored Arc Welding ) PADA MATERIAL ST 41 DENGAN VARIASI
MEDIA PENDINGIN TERHADAP KEKUATAN TARIK DAN
STRUKTUR MIKRO Abstrak.”
[6] H. A. Luhur P, E. S. Hadi, and W. Amiruddin, “Jurnal teknik perkapalan,”
Tek. Perkapalan, vol. 5, no. 2, pp. 421–430, 2017.
[7] R. Rusnaldy and M. E. Maulana, “Pengujian Mampu Las Baja Karbon
Astm A36 dengan Proses Las Busur Listrik,” Rotasi, vol. 19, no. 4, p. 226,
2017, doi: 10.14710/rotasi.19.4.226-230.
[8] J. W. Harbour et al., “Metastatic risk for distinct patterns of postirradiation
local recurrence of posterior uveal melanoma,” Ophthalmology, vol. 104,
no. 11, pp. 1785–1793, 1997, doi: 10.1016/S0161-6420(97)30025-6.
[9] Subagyo, “Analisis Hasil Kekerasan Metode Vikers Dengan Variasi Gaya
Pembebanan Pada Baja,” vol. 6, no. 2, p. 14, 2017.
[10] N. T. Nugraheni, K. N. Kusuma, R. Y. Sari, and A. Sugiharto, “Uji
xii
Kekerasan dengan Metode Rockwell,” Fis. Eksp. Lanjut(Metode Rockwell), pp.
1–9, 2014, [Online]. Available:
https://www.academia.edu/16412835/F_41124_Uji_Kekerasan_Materialde
ngan_Metode_Rockwell%0D.
[11] J. Teknik, B. Kapal, P. Perkapalan, and N. Surabaya, “Analisis Variasi
Jumlah Layer Activated Flux Dan Mixturing Shielding Gas Pengelasan a-
Tig Sa 240 Tipe 316L Terhadap Kedalaman Penetrasi ,” 2019.
[12] N. Subeki, Jamasri, M. N. Ilman, and P. T. Iswanto, “The effect of heating
temperature in static thermal tensioning (STT) welding on mechanical
properties and fatigue crack propagation rate of FCAW in steel A 36,” AIP
Conf. Proc., vol. 1788, 2017, doi: 10.1063/1.4968310.
[13] N. Subekhi and A. Rohman, “EFEK TEMPERATUR TRANSIEN PADA
PENGELASAN,” pp. 177–181, 2016.
[14] Y. L. Xu, Z. B. Dong, Y. H. Wei, and C. L. Yang, “Marangoni convection
and weld shape variation in A-TIG welding process,” Theor. Appl. Fract.
Mech., vol. 48, no. 2, pp. 178–186, 2007, doi:
10.1016/j.tafmec.2007.05.004.