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All Journal Jurnal Teknik Mesin SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Jurnal Mechanical Jurnal IPTEK Prosiding Seminar Nasional Sains dan Teknologi Terapan Jurnal Elemen Journal of Applied Sciences, Management and Engineering Technology (JASMET) Jurnal Teknik Mesin Prosiding Seminar Nasional Teknologi Industri Berkelanjutan
Vuri Ayu Setyowati
Institut Teknologi Adhi Tama Surabaya
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Journal : Jurnal IPTEK

 1 
VARIASI ARUS DAN SUDUT PENGELASAN PADA MATERIAL AUSTENITIC STAINLESS STEEL 304 TERHADAP KEKUATAN TARIK DAN STRUKTURMAKRO Vuri Ayu Setyowati; Suheni Suheni
Jurnal IPTEK Vol 20, No 2 (2016)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2016.v20i2.40

Abstract

ABSTRACT            Welding is the common method for joining material used in construction and industrial applications. Variable of welding process is the most important factor affected into the mechanical properties of welded materials.  This study used Shielded Metal Arc Welding (SMAW) as welding method. SMAW method use flux to protect the metals. Sample preparations were done to make the V groove using 45ᵒ and 60ᵒ as angle of welding. Variations of heat input also were used as 75A, 85A, and 95A. Characterization of mechanical properties was analyzed by tensile test and macroscopic analysis showed the different area after welding. Based on the following experimental result, the highest ultimate tensile strength was obtained by sample  prepared 45ᵒ of V groove angle and 85A of current which is 518 N/mm² and got 449 N/mm² of  yield strength. Increasing current caused the wider weld pool in the sample surface and showed clear grove shape of welded sample. ABSTRAKPengelasan merupakan metode penyambungan material yang secara umum digunakan dalam  bidang konstruksi maupun aplikasi di industri. Parameter pengelasan perlu diketahui karena berpengaruh terhadap sifat mekanik yang dihasilkan material setelah proses penyambungan Pada penelitian ini, proses pengelasan yang digunakan adalah Shielded Metal Arc Welding (SMAW). Pengelasan SMAW menggunakan fluks sebagai pelindung logam. Preparasi sampel dilakukan dengan pembuatan sudut pengelasan/sudut kampuh 45ᵒ dan 60ᵒ.  Arus pengelasan bervariasi sebesar 75A, 85A, dan 95A. Karakterisasi sifat mekanik diperoleh dari pengujian tarik dan pengamatan makro untuk mengetahui perubahan daerah yang berbeda setelah dilakukan pengelasan. Berdasarkan hasil pengujian, spesimen benda uji dengan sudut pengelasan 45ᵒ besar beban maksimal (σu) terjadi pada arus 85 A yaitu sebesar 518 N/mm² dan memiliki tegangan luluh paling tinggi yaitu  449 N/mm². Kenaikan arus pengelasan menyebabkan weld pool yang lebih besar dan permukaan penampang samping terlihat jelas bentuk kampuh sampel pengelasan.
The Mechanical Properties and Microstructure Analysis of Carbon Structural Steel After Quenching in Circulated Water Medium Afira Ainur Rosidah; Vuri Ayu Setyowati; Suheni Suheni; Muhamad Febrianto
Jurnal IPTEK Vol 26, No 1 (2022)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2022.v26i1.1139

Abstract

The use of carbon structural steel in construction is widely developed. It is important to do research continuously in order to get the optimum mechanical and physical properties of a material. Heat treatment which includes heating and quenching is a process that can be carried out to improve mechanical properties. A fast cooling rate is used to obtain higher strength and hardness. This research studied the effect of quenching using circulated water medium with water flow rate variations in structural steel Q235, Q255, and Q275 to their mechanical properties and microstructure. The heat treatment process was done with hardening at 1150oC, roll milling at austenitizing temperature, then quenching using circulated water medium with water flow rate of 225, 238, 247 m3/h. The tensile and hardness test results showed that water flow rate and carbon content in steel give an effect on strength and hardness. The highest tensile strength and hardness value were achieved by Q275 steel with a flow rate of 247 m3/h, which are 73,49 kgf/mm2 and 298 HVN, respectively. Meanwhile, the microstructures resulted in the presence of the mixture of martensite and pearlite, as well as ferrite in every sample with the increase in the composition of martensite and pearlite in Q275 steel with a flow rate of 247 m3/h.
Co-Authors Afira Ainur Rosidah Amang Kuswanto Eriek Wahyu Restu Widodo Hery Irawan, Hery Iftika Philo Wardani Ilham Prajala Samudra Ilham Qiromi M. Wiji Santoso Mohammad Yusuf Sulaiman Muhamad Febrianto Nasrul Amin R. Achmad Supriyadi Saiful Fuadi Firdaus Suheni Suheni