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STUDI EKSPERIMEN PENGARUH SUHU HARDENING DENGAN QUENCHING MEDIA AIR LAUT TERHADAP KETANGGUHAN BAJA ST 60 Abdillah Halim; Muhammad Subhan; Zaldy Kurniawan
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 2 No. 01 (2022): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

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Abstract

ST 60 steel is a medium carbon steel that is often used in machine construction such as shafts and shipbuilding, but impact loads often occur. The purpose of this study was to determine the best toughness of st60 steel from the effect of temperature on the hardening process. The method used for data processing in this study is the two way ANOVA method without interaction. The variables used in this study were temperature (900, 930, 950⁰C) and holding time (30, 60, 90 minutes). The best toughness results were obtained at a temperature of 900⁰C with a holding time of 30 minutes (2.5934 J/mm2) with the lowest toughness results were obtained at a temperature of 950⁰C and a holding time of 90 minutes was obtained at (2.5588 J/mm2).
PENGARUH VARIAN FRAKSI VOLUME SERAT RESAM DAN SERBUK KAYU SERUK/ MEDANG GATAL TERHADAP UJI TARIK DAN UJI IMPACT KOMPOSIT Dewa Eza Adriyan Suwanto; Muhammad Subhan; Indah Riezky Pratiwi
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 2 No. 01 (2022): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

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Abstract

Resam itself is a wild plant that commonly grows around shady and moist cliffs, resam plants can be found in almost all tropical and subtropical regions in Asia. Previous research using resam fibers as composite reinforcement materials showed that resam fibers have an effect on tensile strength and impact strength based on NaOH treatment. Therefore, the purpose of this study is to utilize resam fiber as a composite reinforcement material. Not only resam fiber, this study also utilizes shaved wood powder / itchy field as a composite strengthening added material. The method used in this study is a factorial experimental method, where the parameters used are variants of fiber volume fraction and wood powder. The volume fraction variant used is 8% fiber: 4% wood powder, 6% fiber: 6% wood powder, 4% fiber: 8% wood powder. The results of tensile testing showed the highest tensile strength was located at a percentage of 8% fiber: 4% of wood powder was 14.5 MPa and the lowest tensile strength was located at 4% of fiber: 8% of wood powder was 12.64 MPa. While the results of impact testing showed the highest impact strength was at a percentage of 8% fiber: 4% wood powder which is 35.52328 Kg /² and the lowest impact strength was located at a percentage of 4% fiber : 8% wood powder which is 23.4041 Kg / mm ².