Article Per Year (5 Year)
p-Index From 2020 - 2025
0.444
P-Index
This Author published in this journals
All Journal Jurnal Teknik ITS Sewagati
Fahmi Mubarok
Departemen Teknik Mesin Institut Teknologi Sepuluh Nopember
Arts Humanities Education Engineering Languange, Linguistic, Communication & Media Public Health Social Sciences Other

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Failure Analysis of NbVC Coating Formation onto AISI D2 Tool Steel during Thermo Reactive Diffusion by Pack Method Izdada Rotaal Khamda; Fahmi Mubarok
Jurnal Teknik ITS Vol 8, No 1 (2019)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (403.213 KB) | DOI: 10.12962/j23373539.v8i1.41474

Abstract

Threads of metal fasteners can be created by thread rolling process using specific thread dies. The quality of the thread rolling die is determined by their wear-resistant and hardness properties. In order to increase the hardness and the wear resistance of the dies, thermo reactive diffusion can be applied. The TRD process is carried out by powder-pack method in a sealed steel container containing powder mixture of niobium and vanadium as master alloy, alumina (Al2O3) as inert filler and ammonium chloride (NH4Cl) as activator. The samples were covered with powder mixture and then heated in the electric resistance furnace at temperature of 950, 1000 and 1050 ˚C for 6 hours. Upon finishing the process, the sample is allowed to cool in the open air. The coating cross section was analyzed using optical microscope. The hardness measurement also performed on the same sample. XRD was utilized to investigate the coating chemical composition. The wear of the coatings are assessed using revolving tribological test under dry sliding condition. The XRD and microstructure test results did not find any niobium-vanadium carbide coating on AISI D2 substrate. In untreated and untreated specimens found chromium carbide (Cr7C3). Untreated specimen has hardness number of 277.8 HV. After TRD treatment, the hardness number is increase. For heating temperature variation of 950°C, 1000°C, and 1050°C have hardness number of 798.21HV, 787.3HV, 774.2HV respectively. The value of hardness rises due to the hardening of the AISI D2 specimen. The highest wear resistance owned by temperature variation of 950°C and the lowest wear resistance owned by the untreated specimen.
The Effect of the Holding Time on the Formation of Niobium-Vanadium Carbide Coating Onto Aisi 420 by Thermo Reactive Diffusion Process Husen Haekal; Fahmi Mubarok
Jurnal Teknik ITS Vol 9, No 2 (2020)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23373539.v9i2.58583

Abstract

The deep drawing process had been widely used in automobile, aerospace, electronics, and allied industries to produce hollow parts. The quality of the deep drawing is determined by the dies properties especially their wear-resistant and hardness. Austenitic stainless steel AISI 420 is one of the material of choice for making these dies. In order to increase the wear resistance of the dies, surface treatment such as thermo-reactive diffusion (TRD) technique can be applied owing to their simplicity, low cost, and environment friendly process. TRD technique able to deposit hard layers of carbide, nitride, or carbonitride In this research, TRD techniques will be employed to AISI 420 with special attention given to the effect of holding time during TRD process to form niobium-vanadium carbide (NbVC) coating. The TRD process is carried out by the powder-pack method in a sealed steel container containing powder mixture of niobium and vanadium as master alloy, alumina (Al2O3) as an inert filler and ammonium chloride (NH4Cl) as an activator. The samples were covered with powder mixture and then heated in the electric resistance furnace for 2, 4, and 6 hours at 1000˚C. The crosssection analysis of the NbVC coating observed under microscopy shows that coating thickness increased with longer holding time with 6.95 µm measured in 6 hours holding time. The high hardness of 1333.2 HV also found in the longest holding time of 6 hours. This high hardness is expected to contribute in the wear resistance characterisitic of AISI 420 dies.
Pemanfaatan Mesin Dehidrator Berbasis Mikrokontroler untuk Mengurangi Kadar Air Madu di Desa Kauman, Tulungagung Latifah Nurahmi; Dinny Harnany; M. Khoirul Effendi; Arif Wahjudi; I Made Londen Batan; Suhardjono; Sampurno; Fahmi Mubarok
Sewagati Vol 7 No 3 (2023)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6900.621 KB) | DOI: 10.12962/j26139960.v7i3.512

Abstract

Desa Kauman, Tulungagung, termasuk daerah penghasil madu di Jawa Timur. Namun, para peternak madu masih banyak mengalami kendala dalam mengurangi kadar air dalam madu karena masih menggunakan metode konvensional. Tim Pengabdi ITS bersama dengan mitra UMKM Madu AG bekerja sama merancang mesin dehydrator madu. Kemudian, mesin tersebut diberikan kepada peternak lebah di Desa Kauman. Hal ini bertujuan agar para peternak dapat memanfaatkan mesin dehydrator madu untuk meningkatkan produktivitas produk madu. Syarat madu yang baik harus memilik kadar air tidak lebih dari 22%. Mesin dehydrator madu yang dirancang dalam kegiatan ini mampu mengurangi kadar air hingga 10% dari kadar air dari sebelumnya. Hal ini diharapkan dapat membantu peternak lebah untuk menghasilkan madu dengan kualitas yang lebih baik.
Co-Authors Arif Wahjudi Dinny Harnany Husen Haekal I Made Londen Batan Izdada Rotaal Khamda M. Khoirul Effendi Nurahmi, Latifah Sampurno Suhardjono Suhardjono