ANALISIS KETANGGUHAN DAN KETAHANAN LELAH BAJA KONSTRUKSI LAS PADA BEJANA TEKA…

The transport tank is a horizontal type of pressure vessel used to transport LPG in the oil and gas industry. LPG transport tank pressure vessels result in fatigue in the pressure vessel so fatigue resistance is important for further analysis. The toughness of the material also needs to be analyzed through an experimental approach by adjusting the working temperature conditions of the pressure …

ANALISIS STRUKTUR BIAYA DAN EFISIENSI INDUSTRI BESI DAN BAJA (ISIC:24101) DI …

This study aims to analyze the cost structure and level of technical efficiency and determine the relationship between the cost structure and the level of technical efficiency in the iron and steel industry in Indonesia from 2001 to 2018. The data used is secondary data. The data analysis technique uses the Stochastic Frontier Analysis and Pearson Correlation approaches. The results showed that…

PENGARUH PARAMETER PEMOTONGAN PADA PROSES PENGULIRAN TERHADAP GEOMETRI ULIR B…

This study aims to determine the effect of cutting parameters on screw geometry in the turning process. Data was collected using descriptive analysis techniques. The results showed that the difference in the size of the screw height which was not too significant was at a rotational speed of 100 rpm and a depth of cut of 0.2 mm with a difference of 110.38 µm, while the screw section with a spee…

PENGARUH VARIASI INHIBITOR TEH PADA BAJA ST42 DALAM LINGKUNGAN ASAM SITRAT TE…

Zat tanin merupakan salah satu jenis inhibitor yang dapat digunakan untuk menghambat laju korosi, salah satu jenis inhibitor alami yaitu teh. Inhibitor yang digunakan dalam penelitian ini ada dua jenis, yaitu teh hitam orthodox dan teh celup sari wangi dengan konsentrasi 5%. Proses penelitian dimulai dengan perlakuan panas pada baja St42 dengan suhu 750o C kemudian direndam dengan dua jenis var…

PENGARUH VARIASI KONSENTRASI EKSTRAK DAUN MANGGA MANGIFERA FOETIDA SEBAGAI GR…

Corrosion is material damage due to electrochemical reactions between the material and its environment. This study used medium carbon steel A36 as a test specimen, mango Mangifera foetida leaves as an inhibitor, and 25% NaCl solution as a corrosive medium. Quenching heat treatment is used to apply inhibitors to the test specimens. The purpose of this study was to determine the effect of varying…

PENGARUH QUENCHING TERHADAP LAJU KOROSI PADA BAJA AISI 1045 DENGAN MEDIA PEND…

Metode penelitian yang digunakan pada penelitian ini adalah metode eksperimen yang bertujuan untuk menguji pengaruh dari media pendingin Tubeless tire fluid terhadap laju korosi yang telah melalui proses quenching. Korosi adalah proses terjadinya perusakan material (khususnya logam) akibat dari faktor lingkungannya. Berdasarkan hasil pengujian selama 3 hari pada larutan korosif yaitu larutan as…

PENGARUH VARIASI HOLDING TIME PADA PROSES NORMALIZING TERHADAP NILAI KEKERASA…

Normalizing is the process of heating steel to the austenite phase, and cooling it in open air to 27°C. Thus causing the structure in the material to change initially due to loading. In this study, st 37 steel specimens were used. The aim of this study was to observe the effect of variations in holding time in the normalizing process. The holding time used is 20 minutes, 30 minutes and 45 minu…

KETAHANAN LELAH BESI COR NODULAR DENGAN PEMBEBANAN REPEATED TORSION

Fatigue is a process of permanent progressive localized structural change in a material that occurs due to repeated stresses and strains below the acceptable stress limit for the material and at a certain point in time it will cause cracks and then fractures. thoroughly after certain fluctuations. The damage from this failure is called fatigue failure. The study was conducted using a fatigue te…

KETAHANAN LELAH BAJA KONSTRUKSI PEGAS DAUN DENGAN PEMBEBANAN REPEATED TORSION.

This study discusses the fatigue resistance of leaf spring construction steel with repeated torsion loading. In this test, the leaf spring steel is stressed repeatedly in order to get the required results. The study was conducted using a fatigue test tool with the repeated torsion method. The material being analyzed is leaf spring steel. The test was carried out using 5 variations of different …

PENGARUH ARUS PENGELASAN TERHADAP KEKUATAN TARIK DAN LAS SMAW DENGAN ELEKTROD…

This study aims to determine the highest value in steel materials low carbon using SMAW type welding machine, using the X junction, which distinguishes the use of ampere current variations (100 A, 130 A, 160 A) used in welded joints by saw tensile test result. This research is included in the experimental method. Result this study is a comparison of tensile strength using variations of differen…

PENGARUH QUENCHING TERHADAP LAJU KOROSI PADA BAJA KARBON TINGGI

Corrosion is defined as a color change, quality degradation, destructive phenomenon of a material as a result of a chemical and electrochemical reduction-oxidation reaction between a material and various corrosive substances in its environment. The environment is one of the main factors causing corrosion. In this study, the researcher used an experimental method where the research was carried o…

PENGARUH QUENCHING DAN VARIASI SUHU TEMPERING TERHADAP SIFAT MEKANIK PADA BAJ…

This study aims to determine the effect of variations in tempering temperature on the quenching process on the hardness level of ST 37 steel. The research method used is an experimental method. Specimens with a diameter of 25 mm and a thickness of 20 mm. Researchers used the quenching method with a holding time of 10 minutes and cooling using a salt solution and variations in tempering temperat…

PENGARUH VARIASI TINGKAT KEKENTALAN MEDIA PENDINGIN OLI TERHADAP KEKERASAN BA…

Quenching merupakan salah satu proses untuk meningkatkan kualitas kekerasan produk baja khususnya pada permukaan baja, di suhu austenit. Tujuan penelitian ini untuk mengetahui apakah variasi tingkat kekentalan media pendingin oli dalam proses quenching berpengaruh terhadap nilai kekerasan pada baja aisi 1045. Proses quenching dimulai memanaskan baja aisi 1045 di suhu 820°c, kemudian di-quenchi…

PENGARUH PENGALAMAN PRAKTIK INDUSTRI DAN PRESTASI AKADEMIK TERHADAP KESIAPAN …

Penelitian ini menggunakan variabel pengalaman praktik industri (X1), prestasi akademik (X2) kesiapan kerja mahasiswa (Y), jenis penelitian asosiatif. Populasi penelitian adalah mahasiswa pendidikan teknik mesin angkatan 2019 dan 2018 berjumlah 129 mahasiswa, teknik sampling menggunakan rumus isaac and michael diperoleh 97 sampel mahasiswa. Instrumen penelitian menggunakan angket dan nilai inde…

PENGARUH SENYAWA CHROMIUM TERHADAP KEKERASAN BAJA ST 37 PADA PROSES QUENCHING

Quenching merupakan proses perlakuan panas agar meningkatnya kekerasan material dengan cara dipanaskan sampai temperatur austenite kemudian dididinginkan secara cepat dengan media pendingin. Penelitian tujuan ini untuk mengetahui adanya pengaruh media pendingin senyawa chromium terhadap kekerasan baja st37 pada proses quenching. Penelitian ini menggunakan metode eskperimen dimana penelitian ini…

PENGARUH SENYAWA CHROMIUM TERHADAP LAJU KOROSI BAJA ST 37 PADA PROSES QUENCHING

Quenching is a heat treatment process in which the metal is heated to the austenitic temperature by rapid cooling. This study aims to determine the effect of chromium compound cooling media on the corrosion rate of ST 37 steel in the quenching process. This study used an experimental method, there were four specimens tested by going through the same quenching step but the concentration of chrom…

ANALISIS PERBANDINGAN KEKUATAN TARIK HASIL PENGELASAN SMAW DAN GMAW MENGGUNAK…

Tujuan dari penelitian ini adalah untuk mengetahui kekuatan tarik dari pengaruh variasi media pendingin terhadap pengelasan SMAW dan GMAW pada baja St 37. Penelitian ini menggunakan metode eksperimen, yang menunjukkan hasil kekuatan tarik dari variasi media pendingin yang berpengaruh dan diperoleh nilai kekuatan. Dengan menggunakan dua jenis pengelasan SMAW dan GMAW, masing-masing direndam deng…

PENGARUH PEMANASAN DENGAN INDUCTION HEATER TERHADAP PENGUJIAN TARIK BAJA ST 37

This study aims to see the value of hardness and ductility of the metal tested by tensile testing, with variations in cooling media Quenching water and oil media heated to the same temperature up to 760oC and a specimen without treatment. The results obtained in this study are as in the water media quench specimen which stretches only at 4% and the oil quench media at 5%, which when compared to…

PENGARUH VARIASI SUDUT DAN KUAT ARUS PADA PENGELASAN GMAW TERHADAP KEKUATAN U…

In the welding process, the factors that affect the results of welding include the angle of the seam and the strong current used. This is because the greater the cross-sectional area of the weld joint angle, the more electrode fluid that enters the joint corner, As for the influence of the welding current, the greater the current used, the better the melted electrode fluid binds to the material…

PENGARUH QUENCHING SENYAWA ASAM CUKA PADA KEKERASAN BAJA ST 37

Tujuan penelitian ini adalah mengetahui pengaruh quenching senyawa asam cuka pada kekerasan Baja ST-37 dengan menggunakan media pendingin asam cuka 20%, 30%, 40% dan 50%, aquades dan menggunakan uji vickers. Nilai kekerasan yang didapatkan pengujian kekerasan dengan media pendingin aquades memiliki nilai kekerasan sebesar 101,283 kgf/mm2. Spesimen pengujian kekerasan dengan media pendingin asam…

PERBANDINGAN KEKUATAN TARIK PADA SAMBUNGAN MATERIAL BAJA KARBON SEDANG DENGAN…

This study aims to determine the comparison of the tensile strength of the AISI 1045 medium carbon steel joint after SMAW and GMAW welding using variations of V and X seams and 100A and 120A currents. The research method used is experimental research, based on the treatment that has been given by researchers to 8 specimens, it can be compared the results of the tensile test strength between SMA…

PENGARUH HOLDING TIME ANNEALING TERHADAP KETANGGUHAN BAJA AISI 1045

The use of holding time in annealing heat treatment can affects the toughness of a material, because holding the material at a predetermined holding time can produce homogeneous heating and the grains become finer. Steel material that has been annealed requires a charpy impact test to determine the toughness value of the steel material. This study aims to determine the effect of holding time va…

PENGARUH VARIASI KAMPUH LAS DAN ARUS LISTRIK TERHADAP NILAI KEKERASAN SAMBUNG…

Pengelasan merupakan salah satu hal yang hampir tidak terpisahkan dalam dunia manufaktur karena hampir setiap tempat membutuhkan penyambungan. Penelitian ini bertujuan untuk mengetahui nilai kekerasan yang didapat dari hasil sambungan las MIG (Metal Inert Gas) dengan variasi arus 100 A, 110 A, 120 A dan bentuk kampuh V dan X dengan spesimen baja karbon rendah (ST-37), kemudian dilakukan penguji…

PENGARUH PERLAKUAN PANAS MENGGUNAKAN INDUCTION HEATER TERHADAP KEKERASAN MATE…

Heat treatment is a process of heating and cooling a metal in a solid state with the aim of changing the physical properties of the metal being heated. Induction heating is a metal heating technique by utilizing electromagnetic induction from high frequency AC waves, which is more efficient and faster than heating using a conventional metal heating furnace. This study aims to determine the valu…

PENGARUH RASIO LOGAM Co/Mo TERHADAP POROSITAS DAN SIFAT KEASAMAN KATALIS Co/M…

The research about the effect of metal ratio influence Co/Mo to porosity and acidity of Co/Mo-Ti02 pillared montmorillonite catalyst had been done. Natural montmorillonite was modified with the piilaring agent Ti02 and then followed by Co/Mo impregnation with variation amount of Co:Mo 0:3,9724 g ; 10,9140:13,2414 g ; 16,3710:9,9310 g ; 21,8280:6,6207 g ; 6,5484:0 g. Parameter measured were acid…

OPTIMASI SAMBUNGAN LAS TAK SEJENIS SMAW BAJA KARBON 4340 DAN STAINLESS STEEL …

Engineering and repair industrialization is a sign of technical progress. Welding has been one of the initiatives to improve the quality of the product being manufactured. The type of welding method used is SMAW (Shielded Metal Arc Welding). The Taguchi technique was used to perform dissimilar welding between AISI 4340 and Stainless Steel 304 with the factors that impact the tensile strength. I…

ANALISIS PENGARUH KONSENTRASI INDUSTRI TERHADAP EFISIENSI PRODUKSI PADA INDUS…

The objective of this research is to analyze the effect of industry concentration on the production efficiency of the basic iron and Steel industry m Indonesia. This research uses quantitative and qualitative technical analysis. The quantitative analysis is using simple regression method whith Eviews 3.0. This research used concentration ratio of output value from the largest 4 firms (CR4) to m…

ANALISIS PENINGKATAN NILAI TAMBAH PASIR BESI PT TRISTAR BELITON KUSUMA SEBAGA…

Pasir besi merupakan logam yang paling banyak kedua di bumi. Pasir besi terbentuk selama berjuta tahun lamanya, sehingga kandungan yang terdapat di dalam pasir besi pun beragam, seperti mineral magnetite, hematite, ilmenite, limonite, siderit, pirit, markasit, quartz, serta unsur lainnya. Pada penelitian ini untuk meningkatkan kadar Fe pada pasir besi dilakukan dengan menggunakan alat willobi d…

STEEL BUILDINGS ANALYSIS AND DESIGN 3rd Edition

Edition

3rd

ISBN/ISSN

0-471-86414-5

Collation

x, 673p,; ill.; 23 cm

Series Title

-

Call Number

693.71 Cra s

Cold-Formed Steel Design, FOURTH EDITION

Edition

4th

ISBN/ISSN

978-0-470-46245-4

Collation

xi, 491 p. : ill, ; 29 cm

Series Title

-

Call Number

624.182 Yuw c