scholarly journals The Effect of Cooling Media on Tensile Strength of Medium Carbon Steel in Post Welding Process Using Electric Welding (SMAW) with E7018 Electrodes

Teknomekanik ◽  
2020 ◽  
Vol 3 (2) ◽  
pp. 62-69
Author(s):  
Herman Zulhafril ◽  
Jasman Jasman ◽  
Kimberly June Tespoer
Keyword(s):  
Tensile Strength ◽  
Carbon Steel ◽  
Room Temperature ◽  
Welding Process ◽  
Medium Carbon Steel ◽  
Air Cooling ◽  
Water Cooling ◽  
Medium Carbon ◽  
Electric Welding ◽  
Cooling Media

The use of cooling media in post welding process will affect the tensile strength of a material. This study aims to determine how much the influence of using cooling media in post welding and which cooling media is appropriate to use. The process is done by comparing the tensile strength of each cooling media, namely the cooling media of water, air, and coolant. The use of cooling media is carried out after the welding process, until the material that is ready to be welded reaches room temperature. Based on the experiments that have been conducted, the use of post-welding cooling media affects the tensile strength of medium carbon steel with the highest effect on the water cooling media, then the coolant media, and the lowest is the air cooling media. Therefore, the choice of the use of cooling media significantly affects the tensile strength of medium carbon steel in the post-welding process.

Welding characteristics of S45C medium carbon steel in laser welding process using a high power CW Nd:YAG laser

2004 ◽  
Vol 39 (19) ◽  
pp. 6117-6119 ◽  
Author(s):  
Young-Tae Yoo ◽  
Dong-Gyu Ahn ◽  
Kung-Bo Ro ◽  
Seong-Wook Song ◽  
Ho-Jun Shin ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Laser Welding ◽  
High Power ◽  
Nd:Yag Laser ◽  
Welding Process ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Laser Welding Process

scholarly journals Effect of Spot-Welding Current-Cycle for Medium Carbon Steel And Stainless Steel on Mechanical Properties

2018 ◽  
Vol 7 (4.37) ◽  
pp. 214
Author(s):  
Nawzad J.Mahmod ◽  
Aysha Sh. Hasan ◽  
Ahmed A.Hussein ◽  
Obed M. Ali
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Carbon Steel ◽  
Spot Welding ◽  
Welding Current ◽  
Electrical Current ◽  
Medium Carbon Steel ◽  
Maximum Heat ◽  
Medium Carbon ◽  
Spot Diameter

Spot welding involves the joining of two or more plate metals in localized areas where melting and jointure of a little volume of fabric happens from heating caused by resistance to the passage of an electrical current. This process is typically used for obtaining a lap joint of plate metal parts. In this work, stainless steels and medium carbon steel were used. Three rules for welding set-up, lowest tap on the fastening electrical device, highest % current setting on the weld management and shortest weld time setting on the weld management were adopted. Experiments conducted to show the effect of these variables on the welding diameter and tensile strength for each sample for medium carbon steel and stainless steel separately and joining both metals together by spot welding. The results show that the utmost durability was at stainless steel specimens and minimum tensile strength was at medium carbon steel specimens. Furthermore, the obtained results showed that the maximum heat generated was at stainless steel specimens and minimum heat generated values was at medium carbon steel specimens for all current dependent in this work. Meanwhile, slight effect of heat generated on the spot diameter for the current of 10.6 & 5.3 kA, and so significant effect on the spot diameter for the last current (2.3kA).   

scholarly journals PENGARUH MEDIA PENDINGINAN TERHADAP KEKERASAN DAN STRUKTUR MIKRO HASIL PENGELASAN OXY ACETYLENE PADA MATERIAL BAJA ST-37

2017 ◽  
Vol 5 (2) ◽  
Author(s):  
Made Angga Priadi ◽  
I Nyoman Pasek Nugraha ◽  
Gede Widayana
Keyword(s):  
Weld Metal ◽  
Base Metal ◽  
Heat Affected Zone ◽  
Quantitative Research ◽  
Welding Process ◽  
Air Cooling ◽  
Water Cooling ◽  
Independent Variable ◽  
The Mean ◽  
Cooling Media

Media pendingin merupakan suatu substansi yang berfungsi dalam menentukan kecepatan pendinginan yang dilakukan terhadap material yang telah diuji dalam perlakuan panas. Penelitian ini bertujuan untuk mengetahui tingkat kekerasan dan pengamatan struktur mikro material baja ST-37 yang dipengaruhi media pendinginan air, udara dan oli serta penelitian ini dapat memberikan bahan referensi bagi lingkup pendidikan teknik mesin dan sebagai acuan di dunia industri dalam menggunakan media pendingin pada proses pengelasan. Adapun jenis metode yang digunakan dalam penelitian ini adalah metode penelitian eksperimen. Terdapat dua jenis variable yang digunakan dalam penelitian ini yaitu variabel bebas yang berupa media pendingin air, media pendingin udara dan media pendingin oli dan variabel terikatnya berupa sifat kekerasan. Dari hasil penelitian yang telah dilakukan dimana kekerasan daerah logam induk dengan media pendingin air memperoleh nilai rata-rata sebesar 63,10 Kg/mm2, pendingin udara memperoleh nilai rata-rata sebesar 65,61 Kg/mm2, dan media pendingin oli memperoleh nilai rata-rata sebesar 62,68 Kg/mm2. Kekerasan pada daerah HAZ dengan media pendingin air memperoleh nila rata-rata sebesar 68,49 Kg/mm2, media pendingin udara memperoleh nilai rata-rata sebesar 71,05 Kg/mm2 dan media pendingin oli memperoleh nilai rata-rata sebesar 70,34 Kg/mm2. Kekerasan pada daerah logam las dengan media pendingin air memperoleh nilai rata-rata sebesar 60,99 Kg/mm2, media pendingin udara memperoleh nilai rata-rata sebesar 61,79 Kg/mm2 dan media pendingin oli memperoleh nilai rata-rata sebesar 60,79 Kg/mm2. Berdasarkan dari hasil yang telah didapatkan baik pada logam induk, daerah HAZ dan logam Las dimana tingkat kekerasan yang lebih baik diperoleh dari proses pendinginan udara dibandingkan dengan media pendingin air dan media pendingin oli dari proses pengelasan oxy acytelene.Kata Kunci : Baja ST-37, Kekerasan Material, media pendinginan. The cooling media is a substance which has a function to determine the speed refrigeneration which carried out of the material that has been tasted by heat treatment. The objective of the research is to know the level of hardness and the observation of steel ST-37 material which is affected by cooling media such as water, air, and oil. Also this research may give a reference for Engineering Department of Education and industry in using cooling media for welding process. There is a method that use in this research, that is called quantitative research. There are two variables that use in this research. Independent variable and dependent variable. An independent variable are water, air, and oil cooling media. On the other hand, a dependent variable is nature of hardness. In this research the researcher got a results where the mean of hardness of the base metal area with the water cooling media is 63.10 Kg/mm2, in air conditioning is 61Kg/mm2, and the oil cooling is 62.68 Kg/mm2. The mean of a hardness in Heat Affected Zone (HAZ) by water cooling media 68,49 Kg/mm2, air cooling media is 71,05 Kg/mm2 and an air cooling is 70,34 Kg/mm2. The mean of Hardness in the weld metal area with water cooling media is 60,99 Kg/mm2, air-cooling media is 61,79 Kg/mm2 and oil-cooling media is 60,79Kg/mm2. Based on the result which has been gotten from base metal, Heat Affected Zone (HAZ), and weld metal where the best hardness level is obtained from air-cooling process rather than water cooling media and oil cooling media from oxy acytelene welding process.keyword : Cooling media, steel ST-37, hardness properties.

Effect of Postweld Heat Treatment on the Mechanical Properties of Weld in a Medium Carbon Steel

2013 ◽  
Vol 315 ◽  
pp. 6-10 ◽  
Author(s):  
S.M. Manladan ◽  
B.O. Onyekpe
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Carbon Steel ◽  
Postweld Heat Treatment ◽  
Medium Carbon Steel ◽  
Air Cooling ◽  
Shielded Metal Arc Welding ◽  
Medium Carbon ◽  
Before And After ◽  
Postweld Heat

This paper presents the result of an investigation of the effect of postweld heat treatment on the mechanical properties of weld in 0.36%C medium Carbon Steel. Samples were prepared and welded using Shielded Metal Arc Welding (SMAW) process with a low hydrogen electrode. The welded samples were subjected to postweld heat treatment (stress relief) at four different temperatures: 550°C, 600°C, 650°C and 700°C followed by air-cooling. Microstructural examination was carried out to determine the change in microstructure before and after postweld heat treatment. The mechanical properties of the samples were also tested before and after the heat treatment. It was established that a hard microstructure, susceptible to Hydrogen Induced Cracking (HIC), was formed in the heat affected zone of the as-welded samples and that postweld heat treatment improved the mechanical properties of the weld and substantially reduced or eliminated the risk of HIC.

Effect of medium carbon steel microstructure on tensile strength and fatigue crack growth

2019 ◽  
Vol 10 (1) ◽  
pp. 67-75 ◽  
Author(s):  
Blaoui Mohammed Mossaab ◽  
Mokhtar Zemri ◽  
Mustapha Arab
Keyword(s):  
Heat Treatment ◽  
Tensile Strength ◽  
Fatigue Crack ◽  
Carbon Steel ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Content Type ◽  
Steel Microstructure

Purpose The purpose of this paper is to evaluate the effects of medium carbon steel microstructure on the tensile strength and fatigue crack growth (FCG) behavior. Design/methodology/approach To achieve this aim, four different heat treatment methods (normalizing, quenching, tempering at 300°C and tempering at 600°C) were considered. Microstructural evolution was investigated by scanning electron microscopy. FCG rate tests were conducted on the resultant microstructures with compact tension specimens at room temperature by a standard testing method. Findings The results show that the normalized microstructure had the largest number of cycles to failure, indicating a high fatigue resistance, followed by the as received, tempered at 600°C, tempered at 300°C and quenched microstructure. Originality/value The paper shows the influence of the microstructure on the fatigue-propagation behavior with the definition of the Paris parameters of each heat treatment condition.

Effect of Plastic Deformation at Room Temperature on Powder RE-Chrome-Boronizing for Medium Carbon Steel

2007 ◽  
Vol 353-358 ◽  
pp. 575-578
Author(s):  
Bin Xu ◽  
Le Yang ◽  
Shi Bo Xing ◽  
Li Li
Keyword(s):  
Plastic Deformation ◽  
Carbon Steel ◽  
Room Temperature ◽  
Heating Time ◽  
Boride Layer ◽  
Medium Carbon Steel ◽  
Cold Plastic Deformation ◽  
Main Role ◽  
Medium Carbon ◽  
High Microhardness

In order to increase boronizing speed without decreasing the hardness of boride layer, the effect of plastic deformation at room temperature on powder RE-chrome-boronizing for a medium carbon steel (steel 45), in which boronizing plays a main role, was studied in this paper. The cold plastic deformation (CPD), whether compressing or shot-peening, can increase boronizing speed. Meanwhile, the boride layer can also retain its high microhardness (1 300―1 900HV0.1) with low brittleness. The layer depth achieved for a given heating time increases with increasing CPD degree on the steel. The analyses show that boronizing kinetics in the RE-chrome-boronizing (RE-Cr-B) samples with CPD can be enhanced.

scholarly journals Investigation of Heat Treatment on Mechanical Properties of Medium Carbon Steel

2021 ◽  
pp. 90-95
Author(s):  
R. Suresh
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Carbon Steel ◽  
Heat Treatments ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Standard Methods ◽  
Quenching Media ◽  
Heat Treated

The effect of various heat treatment operations (annealing, normalizing and hardening) on mechanical properties of medium carbon steel was investigated. The samples were prepared and heat-treated at 770 ºC subsequently was cooled by different quenching media. The mechanical properties of the treated and untreated samples were determined using standard methods. Results showed that the mechanical properties of carbon steel can be changed and improved by various heat treatments. It was also found that the annealed samples has the lowest tensile strength and hardness value and highest ductility, while hardened samples has the highest tensile strength and hardness value and lowest ductility value.

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