scholarly journals PROSES PEMBUATAN ARANG BATOK KELAPA DAN TULANG SAPI MENGGUNAKAN METODE PIROLISIS SEBAGAI MEDIA CARBURIZING

POROS ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. 111
Author(s):  
Tumpal Ojahan Ojahan ◽  
Miswanto Miswanto Miswanto ◽  
Slamtt Sumardi Sumardi
Keyword(s):  
Carbon Steel ◽  
Waste Product ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Main Ingredient ◽  
Fixed Carbon ◽  
Steel Material ◽  
The Media ◽  
Food Needs ◽  
Coconut Shells

Fueled by a rise in food needs as beef and oil into basic commodities has been consumed by thepublic, has lead the increasing of waste the cows and coconut shell. The main ingredient used in thisresearch is a waste product from cow bones and from the remains of the coconut shells from which no orhousehold wastes, that can be processed into charcoal. The purpose of this research which is to enhanceeconomic value of waste from cow bones and coconut shells using combustion pyrolysis system beingcharred (fixed carbon) to produce good quality charcoal, to find out the extent of the temperature used andthe composition of charcoal. The process used in this research is pack carburizing with cow bones andcoconut shell as the media at the temperature 950oC, time detention three hours with variations compositioncharcoal. It can be concluded that charcoal bone across his cattle and charcoal coconut can be used as asource of carbon that might improve the force and hardness in the material carbon steel low (low carbonsteel). The process of pack carburizing can increase the value of % C, against low carbon steel material.

The Initial Life and Short Crack Propagation Life for Low Carbon Steel Based on Dislocation Method

2018 ◽  
Vol 1145 ◽  
pp. 1-7
Author(s):  
Yuan Long Yang ◽  
Qing Chun Meng ◽  
Wei Ping Hu
Keyword(s):  
Fatigue Life ◽  
Carbon Steel ◽  
Crack Propagation ◽  
Low Carbon Steel ◽  
Short Crack ◽  
Low Carbon ◽  
Grain Sizes ◽  
Steel Material ◽  
The Relationship ◽  
Good Agreement

In the paper, the relationship between the grain size and fatigue life are studied. To specify the initial and short crack propagation life of low carbon steel material, three methods are used in the simulation. At first, the K. Tanaka’s model is introduced to calculate the fatigue life of a grain. Then, the Voronoi Diagram is used to generate the microstructure of grains. At last, a criteria to specify the short crack is proposed. Based on these methods, the numerical simulation is conducted. With the help of the process, the grain sizes are generated randomly in order to specify how grain sizes effect fatigue life. The computational results are in good agreement with the experimental data. The results show that the randomness of fatigue life is closely related to the randomness of grain sizes.

scholarly journals PENGARUH PENGELASAN GTAW PADA LOGAM BIMETAL PLAT BAJA KARBON RENDAH DAN STAINLESS STEEL TERHADAP SIFAT MEKANIK SAMBUNGAN LAS

INFO-TEKNIK ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 167
Author(s):  
Lisa Agustriyana ◽  
Sarjiyana Sarjiyana ◽  
Suyanta Suyanta
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Carbon Steel ◽  
Yield Strength ◽  
Low Carbon Steel ◽  
Parent Material ◽  
Test Method ◽  
Steel Plates ◽  
Low Carbon ◽  
Steel Material

Stainless steel material (stainless steel) is used in the home industry and the military industry, and also in the nuclear industry. Steel material is divided into five types, namely austenite, ferrite, martensite, duplex and precipitation hardening. Ferritic stainless steel is an attractive alternative in vehicle production because of its corrosion resistance. Different metals have different characteristics from one another, so the welding process of dissimilar metals requires certain techniques. The purpose of this study is to determine the tensile strength of welds in bimetallic welding between low carbon steel plates and stainless-steel plates and to know the hardness of welds in bimetal welding between low carbon steel plates and stainless-steel plates using GTAW welding. The research method used: this research is part of the testing of technical materials conducted by the destructive test method with the category of science and technology development in the field of Mechanical Engineering. There is a trend of increasing tensile strength, yield strength and hardness of bimetallic welding of low carbon steel plates and stainless-steel plates using GTAW welding, that the greater the welding amperes will increase tensile strength, yield strength and hardness. The highest tensile strength was 41.18 Kg / mm2 and the highest yield strength was 41.16 Kgf / mm2 at 60 amperes and the highest hardness was 571.01 BHN at 55 amperes with the corresponding amperage range from the usage table 45 - 65 amperes. In the HAZ area when compared to the parent material, the HAZ area hardness is higher than the parent material and lower than the weld filler.

Kajian Pack Carburizing Menggunakan Media Tulang Sapid an Batok Kelapa Untuk Meningkatkan Kekerasan Baja Karbon Rendah

2019 ◽  
Vol 2 (2) ◽  
Author(s):  
Tumpal Ojahan Rajagukguk ◽  
Miswanto
Keyword(s):  
Carbon Steel ◽  
Waste Product ◽  
Low Carbon Steel ◽  
Coconut Shell ◽  
Low Carbon ◽  
Materials Used ◽  
Carburizing Process

Bahan utama yang digunakan dalam penelitian ini adalah produk limbah tulang sapi dan batok kelapa yang diperoleh dari sisasisa tidak ada atau limbah rumah tangga yang dapat diolah menjadi arang untuk memberikan karbon tambahan. Bahan yang digunakan dalam penelitian adalah baja karbon rendah. Yang dilakukan adalah proses karburisasi paket menggunakan arang tulang sapi dan arang kelapa, dengan variasi suhu 900 oC, 950 oC, 1000 oC dan waktu detensi selama 3 jam, kami melakukan proses pendinginan dengan pendinginan menggunakan air. Adapun tujuan dari penelitian ini untuk memahami sejauh mana pengaruh variasi suhu kadar karbon dengan proses karburisasi paket, dapat meningkatkan kekerasan pada material baja karbon rendah. Kesimpulan dari penelitian setelah selesainya proses pack carburizing menjadi peningkatan persentase karbon (% C) terhadap material satu dan tidak rendah baja karbon dimana karbon sebelum prosa pack carburizing sebanyak 0,106% C naik menjadi enam belas persen 0,776 dari kami juta hingga 1.200% C. Tulang arang di seluruh ternaknya dan arang kelapa dapat digunakan sebagai sumber karbon yang dapat meningkatkan kekerasan dalam material baja karbon rendah. Kekerasan kelapa arang pada suhu 900 oC = 63,61 kgf / mm2, 950 oC = 64,20 kgf / mm2 dan 1000 oC = 64,30 kgf / mm2 sedangkan kekerasan tulang sapi arang pada suhu 900 oC = 61,61 kgf / mm2, 950 oC = 62,22 kgf / mm2 dan 1000 oC = 64,03 kgf / mm2 di mana suhu dan karbon yang lebih tinggi terikat pada baja karbon meningkat.   The chief ingredient used in this research is a waste product bone cows and coconut shell obtained from the remains of no or household wastes that can be processed into charcoal to give an extra carbon. The materials used on research is steel low carbon.The one conducted is a process pack carburizing using charcoal bone cows and charcoal coconut, with variations 900 oC temperature, 950 oC, 1000 oC and time detention for 3 hours, we do the process of cooling with the quenching using water. As for the purpose of this research to understand the extent of influence variations of temperature of carbon levels by pack carburizing process, can escalating violence in the material steel low carbon. The conclusion of the study following the completion of the process of pack carburizing be an increase in the the percentage of carbon ( % C ) against material one and did not low carbon steel where carbon prior to the prose pack carburizing as much as 0,106 % C rose to sixteen per cent 0,776 than us million until its 1,200 % C. Charcoal bone across his cattle and charcoal coconut can be used as a source of carbon that can be escalating violence in the material low carbon steel. Violence charcoal coconut at the temperature 900 oC = 63,61 kgf/mm2, 950 oC = 64,20 kgf/mm2 and 1000 oC = 64,30 kgf/mm2 while violence charcoal bone cows at the temperature 900 oC = 61,61 kgf/mm2, 950 oC = 62,22 kgf/mm2 and 1000 oC = 64,03 kgf/mm2 where the higher temperatures and carbon bound to carbon steel increasing.

PENGARUH ARUS TERHADAP STRUKTUR MIKRO DAN KEKERASAN LASAN JIS Z 3251 DF2A-350-R

2019 ◽  
Vol 4 (1) ◽  
pp. 21-25
Author(s):  
Basori Basori ◽  
Syamsuir Syamsuir
Keyword(s):  
Heat Treatment ◽  
Carbon Steel ◽  
Low Carbon Steel ◽  
Hardness Test ◽  
Low Carbon ◽  
Steel Material ◽  
Heat Treated

AbstrakDilakukan pengelasan dengan elektroda JIS Z 3251 DF2A-350-R dengan tiga variasi arus yaitu 120, 140 dan 160A. Pengelasan dilakukan satu lapis pada material baja karbon rendah. Setelah selesai pengelasan, spesimen langsung dicelupkan ke dalam air. Setelah mendingin kemudian spesimen dilakukan heat treatment dengan temperatur 1000 oC selama 10 menit kemudian dicelup dalam media coolant. Kemudian dilakukan uji kekerasan dan foto mikro. Hasil menunjukkan semakin tinggi arus maka akan semakin tinggi nilai kekerasan baik spesimen yang dicelup coolant maupun tidak. Kata kunci: SMAW, JIS Z 3251 DF2A-350-R, Coolant, Struktur Mikro dan Kekerasan AbstractWelding is done with JIS Z 3251 DF2A-350-R electrodes with three current variations 120, 140 and 160A. Welding is carried out in one layer on low carbon steel material. After welding, the specimen is immediately dipped in water. After cooling, then the specimens were heat treated with the temperature 1000 oC for 10 minutes then dipped in the coolant media. Then the hardness test and microstructure were carried out. The results show that the higher the current, the higher the hardness value whether or not the coolant is dyed. Keywords: SMAW, JIS Z 3251 DF2A-350-R, Coolant, Microstructure and Hardness

Development of trimming technology for hot rolled ultra-low carbon steel

1993 ◽  
Vol 90 (7-8) ◽  
pp. 917-922
Author(s):  
Y. Matsuda ◽  
M. Nishino ◽  
J. Ikeda
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Ultra Low Carbon Steel ◽  
Hot Rolled
Sign in / Sign up

Export Citation Format

Share Document