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All Journal ELKHA : Jurnal Teknik Elektro Turbo : Jurnal Program Studi Teknik Mesin Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Jurnal Pengabdian kepada Masyarakat Vokasi Kapuas Jurnal Alat Berat
Azmal, Azmal
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Journal : Vokasi

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Pengaruh Penambahan Serat Asbes Terhadap Sifat Refractory Brick Berbahan Kaolin dan Fly Ash Handoko, Dwi; Azmal, Azmal; Iyus, Iyus
Vokasi: Jurnal Publikasi Ilmiah Vol. 19 No. 1 (2024): Vokasi: Jurnal Publikasi Ilmiah
Publisher : Politeknik Negeri Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/jv.v19i1.780

Abstract

Abstract: This study aims to determine the effect of adding asbestos to the production of refractory bricks with different material compositions, namely kaolin, fly ash, asbestos and standard water. The composition of kaolin and fly ash is given in equal percentages, varying according to the mass of asbestos, 0 (%), 10 (%), 15 (%), 20 (%), 30 (%). The tests carried out are thermal conductivity and mechanical properties, where these results become parameters for determining the best composition. The results of testing the compressive strength of refractory bricks showed that 0 (%) quartz sand composition had the largest compressive strength, namely 14.40 (Mpa), the impact test results for 0 (%) asbestos fiber composition had the largest value, namely 0.084 (Joule/mm2), while the results Heat conductivity testing showed that quartz composition 30 (%) had the lowest value, namely 0.373 K(W/mC), thus the addition of asbestos fiber can reduce heat conductivity but cause a decrease in the compressive and impact mechanical properties of refractory bricks. Keywords: Refractory bricks, refractories, kaolin, fly ash, asbestos
Analisa Kekerasan dan Kekuatan Tarik pada ST 60 Pasca Hardfacing Welding dengan Variasi Kuat Arus Las dan Elektroda Rd 260 3,2 mm Sutrisno, Sutrisno; Azmal, Azmal; Widagdo, Eko
Vokasi: Jurnal Publikasi Ilmiah Vol. 19 No. 2 (2024): Vokasi: Jurnal Publikasi Ilmiah
Publisher : Politeknik Negeri Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/jv.v19i2.991

Abstract

Welding is needed to fill holes in castings, increase the hardness of the tool layer and equipment or worn components. Damage usually occurs on the wheel shaft of the truck that rubs against the bushing. The purpose of this study was to determine the effect of the hardfacing welding method with variations in current of 90 A, 110 A and 120 A using RD 260 electrodes measuring 3.2 mm on surface hardness and tensile strength. The method used was experimental, aimed at testing and comparing ST.60 material that was not hardfacing welded and hardfacing welded. The results of the study obtained the highest average hardness value in hardfacing welding with a current of 120 A of 202.89 HV, the lowest average hardness value in specimens without hardfacing welding was 97.1 HV and hardfacing welding with a current of 90 A obtained an average hardness value of 104.80 HV and hardfacing welding with a current of 110 A obtained an average hardness value of 112.37 HV. For the average value of tensile strength (σtrk) without hardfacing welding is 660.67 N/mm², the tensile strength in hardfacing welding decreases where for a current of 90 A it is 567.80 N/mm², a current of 110 A the tensile strength (σtrk) is 568.88 N/mm² and 120 A the tensile strength (σtrk) is 574.11 N/mm². This shows that the surface hardness increases with increasing current in hardfacing welding and the tensile strength value will decrease.
Co-Authors . Zulfan Abd, Misswar Agus Rohermanto, Agus Ahmad Faizal Ahmad Faizal Asy'ari, Farida Basri Basri Bernadus Rico Daryono Daryono, Daryono Dedi Kurniawan Devi Andriani Dominikus Sulistriono Dwi Handoko Eko Widagdo Faino, Faino Gregorius Lado Iswanda, Dovian Iyus, Iyus Joni Rahmadi Kamarullah Kamarullah Kasdi Tri Aryada Manurung, Aripin Maratina, Dina Masy’ari, Masy’ari Muh. Toasin Asha Muhammad Yusuf Mujib Mujib, Mujib Mulkan, Andi Naufal, Alban Rina Dwi Yani RR. Ella Evrita Hestiandari Safrizal Safrizal Sutrisno, Sutrisno Sutriyatna, Sutriyatna Syahruddin Syahruddin Teuku Zulfadli Topan Prihantoro Tri Pratomo Widodo PS