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Published by Universitas Merdeka Malang
ISSN : 02163233     EISSN : 25802283     DOI : -
Core Subject : Engineering,
Automotive Engineering Control & Systems Engineering
Jurnal TRANSMISI dipublikasikan oleh Jurusan Teknik Mesin Universitas Merdeka Malang sebagai media diseminasi hasil penelitian dan karya ilmiah baik penelitian dasar maupun terapan di bidang teknik mesin. Berkala ilmiah ini memuat naskah dengan bidang kompetensi konversi energi, material (metalurgi), produksi dan manufaktur baik merupakan penelitian dasar ataupun rekayasa alat terapan.
Arjuna Subject : -
Articles 2 Documents
 1 
Search results for , issue "Vol 20, No 1 (2024): March 2024" : 2 Documents clear
Analysis of The Effect of Post Weld Heat Treatment (PWHT) on The Hardness and Corrosion Rate of SMAW Welded Joints on AISI 304 Plates Diantoro, Helga; Jumiadi, Jumiadi; Widyastuti, Ike
TRANSMISI Vol 20, No 1 (2024): March 2024
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v20i1.12716

Abstract

Post-welding heat treatment (PWHT) is a heat treatment of steel that has undergone welding. The purpose of doing PWHT is to improve the properties of the material itself. Such as uniforming the microstructure, reducing residual stresses, and improving corrosion resistance. In this study the authors conducted a shielded arc welding (SMAW) welding experiment on an AISI 304 steel pelate which had a thickness of 8 mm, a width of 150 mm, and a length of 200 mm. AISI 304 is a type of austenitic stainless steel. The type of seam used is the v seam with an angle of 60˚ and a root face of 2 mm. As for the welding process, it was carried out in the 1G position, using an E308S-15 electrode with a diameter of 2 mm, and a current of 60 A. From the welding carried out on the AISI 304 pelate, then cuts were made to divide the steel into 10 specimens, with a width of 10 mm, a thickness of 8 mm, and 60 mm long. PWHT was carried out with temperature variations of 1100˚C, 900˚C and 700˚C for 15 minutes, and cooled using water as the medium. Conclusions that can be drawn from this research, among others; (1) From the PWHT process carried out at temperatures of 1100˚C, 900˚C and 700˚C. Temperature of 1100˚C can reduce carbide deposition in the weld metal, HAZ and base metal areas, (2) The highest level of hardness occurs in the weld metal area without PWHT of 111.7 HRB, while the lowest hardness level occurs in the HAZ area with PWHT of 1100˚C as big as 95.6 HRB. (3) The highest corrosion rate occurred at PWHT 700˚C of 0.429 mm/y, while the lowest corrosion rate occurred at PWHT 1100˚C of 0.073 mm/y.
Analysis of the Effect of Trotel Variations and Valve Load Variations on the Performance of Gasoline and Diesel Fuel Motors Yazirin, Cepi; Raharjo, Artono
TRANSMISI Vol 20, No 1 (2024): March 2024
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v20i1.12712

Abstract

Technological developments in the modern era have experienced quite a significant increase, one of which is the combustion motorbike. Several things that are of concern to continue to be developed in combustion engines are the fuel system, ignition system and valve mechanism. The aim of this research is to analyze the effect of variations in throttle and valve load on petrol and diesel engines to determine the performance of these engines. The method used in this research is an experimental method by providing throttle variations and valve load variations on petrol and diesel motorbikes. The results of this research are that on petrol motorbikes the throttle changes with a fixed load at Pi, Pm, Ni, Ne, Nm, Qe, ηe, and ηi. There is a correlation between rotation and throttle, where the higher the rotation and the larger the throttle, the higher the value of the throttle. Pi, Pm, Ni, Ne, Nm, Qe, ηe, and ηi. In diesel motors Pi, Pm, Ni, Ne, Nm, Gs, Gg, Qb, Qeg, Qe, Qpp, ηe, and ηi There is a correlation between rotation and throttle, where the higher the rotation and the larger the throttle, the higher the value of Pi. , Pm, Ni, Ne, Nm, Gs, Gg, Qb, Qeg, Qe, Qpp, ηe, and ηi.

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