scholarly journals Effect of Mechanical Vibration on Microstructure and Mechanical Properties of Gray Cast Iron in Lost Foam Casting

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Kai Qiu ◽  
Bota Xiao
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
Mechanical Vibration ◽  
Gray Cast ◽  
Lost Foam Casting ◽  
Flake Graphite ◽  
Microstructure And Properties ◽  
Lost Foam

In order to reveal the effect of vibration solidification on microstructure and properties of gray cast iron in lost foam casting, Y-shaped HT100 gray cast iron was prepared by vibration lost foam casting, and the effect of amplitude on the microstructure and properties of gray cast iron was studied. The results showed that, with the increase in amplitude, the short and thin A-type flake graphite increases, and the austenite structure transforms from columnar to cellular. The hardness, tensile strength, and elongation of gray cast iron first increase and then decrease with the increase in amplitude. The appropriate amplitude in the process of Y-shaped HT100 gray cast iron by lost foam casting is 2 mm, while the tensile strength and elongation of gray cast iron are the highest, with the values of 147.51 MPa and 1.17%, respectively. The change of mechanical properties of gray cast iron is mainly determined by the morphology and distribution of austenite in gray cast iron and A-type flake graphite.

Microstructure and Mechanical Properties of Lost Foam Casting AZ91D Alloy Produced with Mechanical Vibration

2011 ◽  
Vol 213 ◽  
pp. 5-8 ◽  
Author(s):  
Ji Qiang Li ◽  
Zi Tian Fan ◽  
Xuan Pu Dong ◽  
Wen Liu ◽  
Xianyi Li
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Strong Influence ◽  
Mechanical Vibration ◽  
Lost Foam Casting ◽  
Az91d Alloy ◽  
Az91d Magnesium Alloy ◽  
Coarse Microstructure ◽  
Alloy Increase ◽  
Lost Foam

Mechanical vibration was introduced into the solidification in order to overcome the defects of coarse microstructure and low mechanical properties of the AZ91D magnesium alloy via lost foam casting（LFC）. The microstructure with fine uniform dendrite grains were achieved with mechanical vibration, which was mainly attributed to the cavitation and the melts flow induced by the mechanical vibration. The mechanical vibration has strong influence on the mechanical properties of AZ91D alloy. With application of mechanical vibration, the ultimate tensile strength and elongation of the AZ91D alloy increase 23% and 26%, resepectively.

Effect of Carbon Content on Microstructure and Properties of Gray Cast Iron

2014 ◽  
Vol 971-973 ◽  
pp. 44-48
Author(s):  
Ya Li Sun
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Carbon Content ◽  
Liquid Iron ◽  
Gray Cast Iron ◽  
Gray Cast ◽  
Carbon Equivalent ◽  
Microstructure And Properties ◽  
Metallographic Observation ◽  
Equivalent Control

Though the study of carbon content on the microstructure and properties of gray cast iron, mechanical properties test as well as metallographic observation, we could see that the mobility of molten iron is the best when carbon equivalent control at around 4.3%; Liquid iron tend to precipitate A or B type graphite and enhance the casting organization and property when carbon content was increased properly.

scholarly journals The Study of Qualities’ Specialties of Cast Iron’s with Different Composition.

2015 ◽  
Vol 2015 (1) ◽  
pp. 20-24 ◽  
Author(s):  
Наталья Жижкина ◽  
Natalya Zhizhkina ◽  
Сергей Ипатов ◽  
Sergey Ipatov
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
High Temperature ◽  
Gray Cast Iron ◽  
Gray Cast ◽  
Flake Graphite ◽  
Cast Irons ◽  
High Level ◽  
Chilled Cast Iron ◽  
Wear Condition

The paper has been devoted to study of white, chilled and gray cast iron. It has been showed that white cast irons’ ingots are characterized by high level of properties. What is why such materials are used at high temperature and wear condition. Carbides’ and granites existence in the structure increase properties of chilled cast iron. Such cast irons are used for details of metallurgical and other branches of industry. Flake graphite in structure of cast iron decreases level of analyzed properties. But ingots of such cast iron showed high values of tensile strength on compression.

The Lost Foam Casting Simulation of the Gray Cast Iron Linner

2013 ◽  
Vol 834-836 ◽  
pp. 1580-1583
Author(s):  
Shu Heng Yang ◽  
Xiao Ming Du
Keyword(s):  
Cast Iron ◽  
Gray Cast Iron ◽  
Casting Process ◽  
Simulation Method ◽  
Gray Cast ◽  
Lost Foam Casting ◽  
Pouring Temperature ◽  
Technical Parameters ◽  
Lost Foam ◽  
Filling And Solidification

The lost foam casting process of gray cast iron linner was simulated in this paper by using the numerical simulation method to study the properties of the filling and solidification for lost foam casting. And the comparison of the simulated results with the practical casting obtained from foundry was implemented. The results show that the reasonable technical parameters were obtained: pouring temperature of 1400°C, foam density of 13 kg/m3, vacuum of 0.04MPa, coating thickness of 0.5 mm and coating permeability of 9.5×10-9m2/Pa·s.

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

ISO 185/JL/225

Alloy Digest ◽  
2020 ◽  
Vol 69 (9) ◽  
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
Heat Treating ◽  
International Organization ◽  
Gray Cast ◽  
Damping Capacity ◽  
Lower Strength ◽  
Test Pieces ◽  
Lower Carbon

Abstract ISO 185/JL/225 is an intermediate-tensile-strength gray cast iron that has a predominantly pearlitic matrix, and a tensile strength of 225–325 MPa (33-47 ksi), when determined on test pieces machined from separately cast, 30 mm (1.2 in.) diameter test bars. Compared with the lower strength gray cast iron grades, ISO 185/JL/225 contains lower carbon and silicon contents, while still maintaining excellent thermal conductivity, damping capacity, and machinability. This datasheet provides information on composition, physical properties, tensile properties, and compressive strength as well as fatigue. It also includes information on heat treating. Filing Code: CI-73. Producer or source: International Organization for Standardization (ISO).

ISO 185/JL/350

Alloy Digest ◽  
2021 ◽  
Vol 70 (9) ◽  
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
High Strength ◽  
Heat Treating ◽  
Gray Cast ◽  
Spheroidal Graphite ◽  
Cast Irons ◽  
Test Pieces

Abstract ISO 185/JL/350 is a higher-tensile-strength gray cast iron that has a pearlitic matrix, and a tensile strength of 350–450 MPa (51–65 ksi), when determined on test pieces machined from separately cast, 30 mm (1.2 in.) diameter test bars. It provides a combination of high strength while still maintaining good thermal conductivity compared with other types of cast iron. This grade approaches the maximum tensile strength attainable in gray cast iron. Applications therefore tend to be confined to those where thermal conductivity requirements in service preclude the use of one of the other higher-strength materials such as spheroidal graphite cast irons, which have inferior thermal properties. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on wear resistance as well as casting and heat treating. Filing Code: CI-85. Producer or source: International Organization for Standardization.

MEEHANITE GC275

Alloy Digest ◽  
2021 ◽  
Vol 70 (2) ◽  
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Physical Properties ◽  
Tensile Properties ◽  
Gray Cast Iron ◽  
Heat Treating ◽  
Gray Cast ◽  
Strength Grade ◽  
Test Pieces

Abstract Meehanite GC275 is a pearlitic gray cast iron that has a minimum tensile strength of 275 MPa (40 ksi) when determined on test pieces machined from separately cast, 30 mm (1.2 in.) diameter, test bars. This intermediate-tensile-strength grade has a fine, close-grained structure that is ideal for finishing cuts. It is used for a wide variety of applications on account of its useful combination of good all round properties with adaptability to production of small and large volumes. This datasheet provides information on physical properties, hardness, and tensile properties as well as fatigue. It also includes information on heat treating, machining, and joining. Filing Code: CI-78. Producer or source: Meehanite Metal Corporation.

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