scholarly journals ANALISA REKAYASA SIFAT MEKANIK BAJA AISI 4140 DENGAN VARIASI SUHU TEMPERING UNTUK MENINGKATKAN KEULETAN DAN KEKERASAN MATERIAL

2020 ◽  
Vol 6 (1) ◽  
pp. 64
Author(s):  
Shultoni Mahardika
Keyword(s):  
Mechanical Properties ◽  
Spare Parts ◽  
Aisi 4140 ◽  
Untreated Material ◽  
Water Media ◽  
Automatic Machinery ◽  
Technical Planning ◽  
Design Calculations ◽  
Steel Hardening ◽  
Main Material

Steel is a type of material that is widely used as a main material in the manufacture of various kinds of industrial and automatic machinery spare parts. Some mechanical properties of steel that are often used in design are hardness, ductility and toughness. Often in a design, we have difficulty getting steel with mechanical properties that are appropriate with the design. For this reason, engineering carried out mechanical properties engineering, to obtain steel in accordance with design calculations. AISI 4140 steel is a medium alloy steel. This steel is often used for industrial and automotive machinery parts. This research engineered the mechanical properties of the steel, namely the hardness and ductility of the material. The process is carried out by conducting steel hardening at 850 °C followed by rapid cooling with water media. After that, tempering at temperatures of 300 ᵒC, 400ᵒC and 500ᵒC by cooling together with the furnace. The result is hardness and tensile strength of the material has increased, when compared with untreated material. This method is effectively used to obtain mechanical strength values in accordance with technical planning calculations. . Keywords: Tempering, AISI 4140, Mechanical Properties Engineering

Teknologi Inokulasi Besi Cor Kelabu FC-250 Untuk Mencegah Pengerasan Pada Dove Tale Produk Ragum Tipe 125

2019 ◽  
Vol 16 (2) ◽  
Author(s):  
Amin Suhadi ◽  
Seodihono
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Treatment Process ◽  
Gray Cast Iron ◽  
Spare Parts ◽  
Gray Cast ◽  
Micro Structure ◽  
Control Factors ◽  
Seed Inoculation ◽  
Casting Industry

Production technology of metal casting industry in Indonesia needs to be improved, especially in the manufacturing of spare parts and box engine made of gray cast iron which has various wall thick such as dove tale construction. Microstructure of gray cast iron is influenced by cooling rate during casting, chemical composition and melting treatment process (inoculation). The part which has the thinnest thickness has the fastest cooling therefore, the grain boundary is smaller compared to other section. As a result this part has highest hardness and difficult to be machined. This research is conducted to solve this problem by modifying melting and solidification treatment process. The research starting from micro structure analysis, composition and mechanical properties tests on the product, and then conducting modification treatment through Taguchi method approach. Experimental results obtained show that the best level settings to control factors which affect to the uniformity of the microstructure and mechanical properties in gray cast iron is the addition of seed inoculation super ® 75, as much as 0.25% with the method of inoculation material entering into the Transfer Ladle.Teknologi produksi pada industri pengecoran di Indonesia masih membutuhkan perbaikan terutama dalam pembuatan komponen mesin perkakas dan peralatan pabrik yang terbuat dari besi tuang kelabu yang mempunyai variasi ketebalan yang besar seperti konstruksi ekor burung (dove tale). Pada pengecoran, struktur mikro dari besi tuang kelabu sangat dipengaruhi oleh kecepatan pendinginan, komposisi kimia dan proses perlakuan pada logam cair (inokulasi). Bagian yang mempunyai ukuran paling tipis mempunyai kecepatan pendinigan paling tinggi karena itu ukuran butirnya jauh lebih kecil dari bagian lain, akibatnya bagian ini mempunyai kekerasan lebih tinggi dan sulit dilakukan pengerjaan mesin. Penelitian ini bertujuan untuk memperbaiki hal ini yang terjadi pada dove taledengan cara memodifikasi proses perlakuan pada cairan besi dan proses pendinginan. Penelitian dimulai dari analisa struktur mikro, pengujian komposisi kimia, pengujian sifat mekanis pada produk kemudian dilakukan modifikasi menggunakan pendekatan metode statistik Taguchi. Hasil penelitian menunjukkan bahwa pengaturan terbaik yang dapat diperoleh untuk mendapatkan keseragaman struktur mikro dan sifat mekanis pada pengecoran besi tuang kelabu adalah penambahan seed inoculation super ® 75, sebesar 0.25% dengan metode pemasukan inokulasi kedalam Ladle pengangkut logam cair.Keywords: carbon, micro structure, hardness, inoculation

Mechanical Properties of Layers Obtained by DC-Pulsed Plasma Nitriding on a Low-Alloy Steel (AISI 4140)

2009 ◽  
Vol 6 (S1) ◽  
pp. S314-S320 ◽  
Author(s):  
Luciano Dutrey ◽  
Evangelina De Las Heras ◽  
Hernán G. Svoboda ◽  
Pablo A. Corengia
Keyword(s):  
Mechanical Properties ◽  
Alloy Steel ◽  
Plasma Nitriding ◽  
Pulsed Plasma ◽  
Low Alloy Steel ◽  
Aisi 4140 ◽  
Steel Aisi

scholarly journals INFLUENCE OF VACUUM ACTIVATED DIFFUSION CHROMING ON MECHANICAL PROPERTIES OF THE SURFACE OF STEEL 25X1MF

2020 ◽  
pp. 132-138
Author(s):  
S.G. Rudenkyi ◽  
V.I. Zmij ◽  
N.F. Kartzev ◽  
A.A. Korneev ◽  
A.V. Kunchenko ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Layer ◽  
Sodium Chloride ◽  
Abrasive Wear ◽  
Steel Surface ◽  
Chromium Content ◽  
Chromium Plating ◽  
Untreated Material

In the work, the surface of samples made of 25X1MF steel was saturated with chromium. For this, the method of vacuum activated diffusion chromium plating was used. In this process, sodium chloride was used as an activator. It was found that vacuum activated diffusion chromium plating of samples made of 25Kh1MF steel leads to the formation of a surface layer containing from 87 to 97 wt.% of this element. It was found that an increase in the temperature of the process and its duration leads to an increase in the chromium content on the surface of the samples. The tests showed that in the case of cavitations-erosion effects on the surface of chrome-plated samples of steel 25X1MF they have higher resistance. With abrasive wear, the resistance of the chrome-plated steel surface is 1.8 to 3 times higher compared to untreated material.

scholarly journals Experimental Study of Mechanical Properties of AISI 1045, AISI 1053 and AISI 4140 Steels

2020 ◽  
Vol 8 (4S) ◽  
pp. 42-44
Keyword(s):  
Mechanical Properties ◽  
Young’S Modulus ◽  
Rear Axle ◽  
Young's Modulus ◽  
Lower Strength ◽  
Prime Concern ◽  
Aisi 4140 ◽  
Aisi 1045 ◽  
The Comparative Study ◽  
Selection Of

AISI 1045, AISI 1053 and AISI 4140 are the mostly used material for axle shaft of a vehicle. The comparative study of these materials definitely will help in selection of appropriate material for required condition. AISI 4140 has shown greater Young’s modulus, yield strength and tensile strength, but moderate ductility is observed. The lesser ductility of AISI 1053 limits its usage in rear axle shaft. The ductility and Young’s modulus of AISI 1045 is satisfactory, but lower strength is prime concern with it.

The Microstructure and Mechanical Properties of Direct-Quenched and Tempered AISI 4140 Steel

2011 ◽  
pp. 745-753
Author(s):  
A.H. Meysami ◽  
R. Ghasemzadeh ◽  
H. Seyedyn ◽  
M.R. Aboutalebi ◽  
R. Rezaei
Keyword(s):  
Mechanical Properties ◽  
Aisi 4140 Steel ◽  
Microstructure And Mechanical Properties ◽  
Aisi 4140

scholarly journals Mechanical and Thermal Influences on Microstructural and Mechanical Properties during Process-Integrated Thermomechanically Controlled Forging of Tempering Steel AISI 4140

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5772
Author(s):  
Bernd-Arno Behrens ◽  
Kai Brunotte ◽  
Tom Petersen ◽  
Julian Diefenbach
Keyword(s):  
Mechanical Properties ◽  
Cooling System ◽  
Mechanical Tests ◽  
Integrated Treatment ◽  
Fine Grained ◽  
Bainitic Microstructure ◽  
Aisi 4140 ◽  
Steel Aisi ◽  
Intermediate Cooling ◽  
Different Characteristics

Thermomechanical treatment (TMT) describes the effect of thermal and mechanical conditions on the microstructure of materials during processing and offers possible integration in the forging process. TMT materials exhibit a fine-grained microstructure, leading to excellent mechanical properties. In this study, a two-step TMT upsetting process with intermediate cooling is used to demonstrate possibilities for a process-integrated treatment and corresponding properties. A water–air-based cooling system was designed to adjust different phase configurations by varying the target temperature and cooling rate. Four different thermal processing routes and four combinations of applied plastic strains are investigated in standardized mechanical tests and metallographic analyses. The applied TMT results in a finely structured bainitic microstructure of the investigated tempering steel AISI 4140 (42CrMo4) with different characteristics depending on the forming conditions. It can be shown that the demands of the standard (DIN EN ISO 683) in a quenched and tempered state can be fulfilled by means of appropriate forming conditions. The yield strength can be enhanced up to 1174 MPa while elongation at break is about 12.6% and absorbed impact energy reaches 58.5 J without additional heat treatment when the material is formed after rapid cooling.

Influence of Built Orientation on Mechanical Properties in Fused Deposition Modeling

2014 ◽  
Vol 592-594 ◽  
pp. 400-404 ◽  
Author(s):  
Sandeep V. Raut ◽  
Vijaykumar S. Jatti ◽  
T.P. Singh
Keyword(s):  
Mechanical Properties ◽  
Rapid Prototyping ◽  
Fused Deposition Modeling ◽  
Polymer Materials ◽  
Manufacturing Cost ◽  
Layer By Layer ◽  
Total Cost ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Main Material

Fused deposition modeling (FDM) is one of the thirty techniques of rapid prototyping methods that produce prototypes from polymer materials (natural or with different grades). Acrylonitrile butadiene styrene (ABS) is one of the good material among all polymer materials. It is used in the layer by layer manufacturing of the prototype which is in the semi-molten plastic filament form and built up on the platform from bottom to top. In FDM, one of the critical factor is to select the built up orientation of the model since it affects the different areas of the model like main material, support material, built up time, total cost per part and most important the mechanical properties of the part. In view of this, objective of the present study was to investigate the effect of the built-up orientation on the mechanical properties and total cost of the FDM parts. Experiments were carried out on STRATASYS FDM type rapid prototyping machine coupled with CATALYST software and ABS as main material. Tensile and Impact specimens were prepared as per the ASTM standard with different built-up orientation and in three geometrical axes. It can be concluded from the experimental analysis that built orientation has significant affect on the tensile, impact and total cost of the FDM parts. These conclusions will help the design engineers to decide on proper build orientation, so that FDM parts can be fabricated with good mechanical properties at minimum manufacturing cost.

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