The Effect of Airflow Speed as Cooling Media in the Hardening Process to the Hardness, Corrosion Rate and Fatigue Life of Medium Carbon Steel

2021 ◽  
Vol 1045 ◽  
pp. 40-49
Author(s):  
Sunardi Sunardi ◽  
Rina Lusiani ◽  
Erny Listijorini ◽  
Ruddy Santoso ◽  
Iman Saefuloh
Keyword(s):  
Fatigue Life ◽  
Barium Carbonate ◽  
Surface Hardness ◽  
Medium Carbon Steel ◽  
Holding Time ◽  
Material Surface ◽  
Airflow Rate ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel

Carburizing is a method for obtaining a sturdy material surface. This hard surface is used for machine elements that intersect with other materials, so failure due to wear can be avoided. However, this increase in hardness has always been followed by decreased ductility. This condition certainly lowers the fatigue life of the material. For that, it is necessary to compromise between surface hardness and ductility. This study used AISI 1045 steel, which has a surface roughness of 0.4 and 4.7 μm with carburation media used, is a mixture of 80% coconut shell charcoal and 20% Barium carbonate. The sample was given the pack carburization treatment at 850°C and holding time for 3 hours, and then cooled in the open air. The samples were reheated at 850°C, holding time for 17 minutes, and then cooled with airflow at speeds of 10.34, 15.51, and 20.06 m/s for 30 minutes. This research shows that the surface of steel with a roughness of 0.4 μm has excellent performance with the hardness and corrosion level respectively 228.6 HV and 2.3586 mpy at cooling airflow rate of 20.06 m/s while the fatigue life of material occurs at the speed of airflow cooling 10.43 m/s.

scholarly journals PENGARUH PENGHILANGAN KEKASARAN PERMUKAAN TERHADAP KEKUATAN FATIK = EFFECT OF SURFACE ROUGHNESS REMOVAL TO FATIGUE STRENGTH

2015 ◽  
Vol 9 (3) ◽  
pp. 115-130
Author(s):  
H. Agus Suhartono
Keyword(s):  
Surface Roughness ◽  
Fatigue Life ◽  
Fatigue Strength ◽  
Fatigue Loading ◽  
Bending Fatigue ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel ◽  
Test Result ◽  
Effect Of Surface

The aim of the study is to investigate and to prove that the fatigue failure of steel is initiated from the surface. Hence the preventif action of smoothening the surface that has been loaded by fatigue loading is very important. The specimen of AISI 1045 Steel is loaded by means of rotary bending fatigue. The fatigue loading will be interupted as the fatigue life reaching 50% of fatigue life and 75% of fatigue life. During the interuption the specimen will be grinded and polished, before tested completely until fatigue fracture occured. The fatigue life of each group of scpecimen based on the art of loading will be compared to the specimen tested by fatigue loading without interuption.The Miner rule is used to evaluated the test result. The influence of interuption and surface treatment is evaluated and analyzed. ABSTRAKTujuan penelitian ini adalah untuk menyelidiki dan membuktikan bahwa kegagalan kelelahan baja dimulai dari permukaan. Oleh karena itu tindakan pencegahan dengan memperhalus permukaan sangat penting untuk mencegah beban kelelahan baja. Spesimen dari AISI 1045 Steel dimuat dengan cara uji kelelahan lentur putar. Kelelahan pemuatan akan disela sebagai umur kelelahan mencapai 50% dari umur kelelahan dan 75% dari umur kelelahan. Selama gangguan lainnya yang spesimen akan digiling dan dipoles, sebelum diuji benar-benar sampai patah akibat kelelahan yang terjadi. Umur kelelahan dari setiap kelompok specimen diuji berdasarkan beban akan dibandingkan dengan spesimen oleh kelelahan bongkar tanpa aturan. The Miner rule digunakan untuk mengevaluasi hasil tes. Pengaruh gangguan lainnya dan perlakuan permukaan dievaluasi dan dianalisis. 

scholarly journals Study on Friction and Wear Properties of Zr–Cu–Ni–Al Crystalline Powder Cladding and Amorphous Composite Powder Cladding by Laser

Coatings ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 103
Author(s):  
Yugan Chen ◽  
Pingjun Tao ◽  
Weijian Zhang ◽  
Chaohan Zhang ◽  
Kunsen Zhu
Keyword(s):  
Friction And Wear ◽  
Surface Hardness ◽  
Amorphous Powder ◽  
Crystalline Powder ◽  
Wear Performance ◽  
Cladding Layer ◽  
The Matrix ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel

In order to improve the friction and wear performance and surface hardness of AISI 1045 steel and expand its application range, this paper carried out the research on friction and wear performance and surface hardness of Zr65Al7.5Ni10Cu17.5 crystalline powder (CP) and amorphous powder (AP) after laser cladding on AISI 1045 steel surface. The results show that both CP and amorphous powder (AP) formed a cladding layer on the surface of AISI 1045 steel under laser irradiation. The thickness of the cladding layer is about 400 μm, and the thickness of the AP cladding layer is slightly larger than that of the CP cladding layer. The results show that there are many holes in the AP cladding layer, and holes can be observed at the junction with the matrix; while the CP cladding layer is well combined with the matrix and no holes are observed. The friction performance of CP cladding layer is better than that of AP cladding layer. In the wear marks of the AP cladding layer, there are bonding areas, while the wear marks of the CP cladding layer have a furrow-like morphology, and part of the matrix is exposed. The surface microhardness and average microhardness of AP cladding layer are 49% and 94% higher than that of CP cladding layer, respectively. Hardness modification has obvious advantages. The reasons for porosity, large friction coefficient and low stability of the friction experiment of the AP cladding layer are analyzed and discussed. The ideas and methods for improving the laser irradiation to achieve both high wear resistance and high strength of the AP cladding layer are proposed.

scholarly journals Pengaruh Kecepatan Pemotongan dan Ketebalan Bahan Terhadap Kekerasan dan Kekasaran Permukaan Baja AISI 1045 Menggunakan CNC Plasma Arc Cutting

2019 ◽  
Vol 4 (2) ◽  
pp. 93-98
Author(s):  
Ami Rima Rahmawati ◽  
Samsudin Anis ◽  
Rusiyanto Rusiyanto
Keyword(s):  
Surface Roughness ◽  
Cutting Speed ◽  
Surface Hardness ◽  
Hardness Test ◽  
Plasma Arc ◽  
Plasma Arc Cutting ◽  
Material Thickness ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel

This experimental study aims to determine the effect of cutting speed and material thickness on the surface hardness and roughness resulting from the cutting of AISI-1045 steel using CNC Plasma Arc Cutting. The data analysis technique being used was descriptive statistics. The variables of cutting the AISI-1045 steel for the cutting speeds are 75 mm/min, 100 mm/min, and 125 mm/min. The variables for material thickness are 5 mm, 9 mm, and 13 mm. The experiment carried out were the hardness test using Micro-hardness Tester M800 and roughness test using Surfcorder SE-1700. The results show that the lower the cutting speed, the higher the surface hardness and roughness value, and vice versa. The great thickness of the material, the hardness produced and the roughness value is higher. When the cutting speed and thickness of the material value are high, the workpiece cannot be cut off. The lowest hardness and surface roughness values were 261.33 HV and 10.3 µm, respectively, using a cutting speed of 125 mm/min and the material thickness of 5 mm. The highest hardness value is 319.66 HV, using a cutting speed of 75 mm/min and a material thickness of 13 mm. The highest surface roughness value is 26.8 µm, which were obtained using a cutting speed of 75 mm/min and material thickness of 9 mm.Penelitian ini bertujuan untuk mengetahui pengaruh kecepatan pemotongan dan ketebalan bahan terhadap kekerasan dan kekasaran permukaan hasil pemotongan baja AISI-1045 menggunakan CNC Plasma Arc Cutting. Penelitian ini menggunakan metode eksperimen dan teknik analisis data yang digunakan adalah statistika deskriptif pada pemotongan baja AISI-1045 dengan kecepatan pemotongan 75 mm/min, 100 mm/min, 125 mm/min dan tebal bahan 5 mm, 9 mm, dan 13 mm. Pengujian kekerasan dilakukan menggunakan microhardness terster M800 dan pengujian kekasaran dilakukan menggunakan Surfcorder SE-1700. Hasil penelitian menunjukkan bahwa semakin rendah kecepatan pemotongan maka nilai kekerasan semakin tinggi dan nilai kekasaran permukaan semakin tinggi atau sebaliknya. Semakin besar ketebalan bahan yang digunakan maka nilai kekerasan yang dihasilkan semakin tinggi dan nilai kekasaran semakin tinggi atau sebaliknya. Semakin tinggi kecepatan pemotongan dan ketebalan bahan, benda kerja tidak dapat terpotong. Nilai kekerasan dan kekasaran permukaan paling rendah yaitu 261,33 HV dan 10,3 µm dengan kecepatan pemotongan 125 mm/min dan ketebalan bahan 5 mm. Nilai kekerasan yang paling tinggi yaitu 319,66 HV dengan menggunakan kecepatan pemotongan 75 mm/min dan ketebalan bahan 13 mm dan nilai kekasaran permukaan paling tinggi yaitu 26,8 µm dengan kecepatan pemotongan 75 mm/min dan ketebalan bahan 9 mm.

scholarly journals PVD Coatings Influence (TiCN, BCN and CrAlN) on the Fatigue Life Behavior of AISI 1045 Steel for Automotive Applications

2021 ◽  
Author(s):  
Juan Francisco Correa ◽  
Julio César Caicedo ◽  
Yesid Castro Aguilar
Keyword(s):  
Fatigue Life ◽  
Fatigue Behavior ◽  
Chemical Properties ◽  
Automotive Applications ◽  
X Ray ◽  
Fracture Surfaces ◽  
Ticn Coating ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel

Abstract This current work evaluated the influence of Titanium Carbo-nitride (TiCN), Chromium Aluminum Nitride (CrAlN) and Boron Carbo-nitride (BCN) coatings deposited on AISI 1045 steel and its behavior in fatigue life. Suitable deposition parameters were established for the coatings to show high hardness onto the substrate, appropriate deposition time for polycrystalline growth and desired stoichiometry, as well as a stable layer thickness of ~ 3 µm. The physical and chemical properties of the coatings obtained were established by X-ray diffraction (XRD), X-ray photo-electron spectroscopy (XPS) and nanoindentation; the scanning electron microscopy (SEM) was used for the analysis of the fracture surfaces of the samples subjected to fatigue. The analysis of the fatigue behavior of the uncoated and coated substrates were performed under rotary bending conditions applying maximum alternating stresses in the interval of 55–70% of the ultimate strength value, i.e. from 479 to 610 MPa, respectively; the test was performed at room temperature. The study of the results established that the fatigue resistance properties increased for the three types of coated samples, TiCN, BCN and CrAlN, with values of 9.6%, 4.2% and 3.9%, respectively, calculated for 1x106 cycles. The highest value in fatigue life improvement corresponded to the TiCN coating, followed by BCN. This can be associated to the increase hardness present in the TiCN layer; this improved the mechanical properties of the coating. The examination of the fracture surfaces carried out in the tested samples (coated and uncoated), clearly demonstrate that the cracks produced by fatigue started in the surface of the coating and later propagated to the substrate. The mechanicals and fatigue results found in these ternary coatings deposited on AISI 1045 steel open a possibility of future applications in mechanical devices e.g. automotive applications that require high fatigue demands in service conditions.

scholarly journals Increasing Surface Hardness of AISI 1045 Steel by AIH-FPP/Plasma Nitriding Treatment

2013 ◽  
Vol 54 (3) ◽  
pp. 344-349 ◽  
Author(s):  
Shoichi Kikuchi ◽  
Takahiro Fukuoka ◽  
Takuma Sasaki ◽  
Jun Komotori ◽  
Kengo Fukazawa ◽  
...  
Keyword(s):  
Plasma Nitriding ◽  
Surface Hardness ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel

scholarly journals Hard Anodization Film on Carbon Steel Surface by Thermal Spray and Anodization Methods

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3580
Author(s):  
Pao-Chang Chiang ◽  
Chih-Wei Chen ◽  
Fa-Ta Tsai ◽  
Chung-Kwei Lin ◽  
Chien-Chon Chen
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Steel Surface ◽  
Steel Substrate ◽  
Substrate Surface ◽  
Aluminum Film ◽  
Medium Carbon Steel ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel

In this paper, we used two mass-produced industrial technologies, namely, thermal spraying and anodization methods, to enhance the surface characteristics of AISI 1045 medium carbon steel for use in special environments or products. The anodic film can effectively improve the surface properties of carbon steel. A sequence of treatments of the carbon steel substrate surface that consist of sandblasting, spraying the aluminum film, annealing, hot rolling, cleaning, grinding, and polishing can increase the quality of the anodized film. This paper proposes an anodization process for the surface of carbon steel to increase the corrosion resistance, hardness, color diversification, and electrical resistance. The resulting surface improves the hardness (from 170 HV to 524 HV), surface roughness (from 1.26 to 0.15 μm), coloring (from metal color to various colors), and corrosion resistance (from rusty to corrosion resistant). The electrochemical corrosion studies showed that the AISI 1045 steel surface with a hard anodized film had a lower corrosion current density of 10−5.9 A/cm2 and a higher impedance of 9000 ohm than those of naked AISI 1045 steel (10−4.2 A/cm2 and 150 ohm) in HCl gas.

scholarly journals Karakteristik Peningkatan Kemampuan Lelah AISI 1045 terhadap Proses Hardening

2021 ◽  
Vol 2 (3) ◽  
pp. 478-489
Author(s):  
Rizky Sulistyawan Sofian Junaida
Keyword(s):  
Holding Time ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel

Baja memiliki peran penting dalam industri di mana banyak desain komponen mesin menggunakan bahan ini. Sifat mekanis bahan cukup mampu melakukan berbagai aplikasi lapangan dalam berbagai aplikasi. Efisiensi dan efektivitas baja itu sendiri selalu menjadi pertimbangan dalam memilih bahan sesuai dengan pertimbangannya. Hal ini untuk menentukan proses pengerasan yang terjadi pada bahan baja AISI 1045. Membandingkan sifat bahan baja AISI 1045 dengan sebelum dan sesudah proses perlakuan panas. Metodologi penelitian dilakukan dengan menggunakan perbandingan data literatur di media jurnal internasional mengenai perbandingan proses perlakuan panas AISI 1045 Steel dan mendapatkan data dari hasil tes yang terkandung dalam jurnal, yaitu Hardening, Holding Time, Quenching membandingkan hasil data yang diperoleh dari data sekunder. Dari hasil penelitian yang telah dilakukan dapat dilihat bahwa waktu penahanan yang lama dalam proses pengerasan tidak selalu memengaruhi kekerasan baja AISI 1045. Dapur memancarkan panas, suhu di ruang pemanas tidak selalu stabil selama waktu penahanan yang lama, karbon tidak rata karena menyebar ke dalam spesimen selama proses pengerasan. Hasil penelitian baja AISI 1045 terlihat dari tes kekerasan sebelum dan sesudahnya.

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