these stainless steels have a low content of C and a high melting point as compared with austenitic spheroidal graphite iron, and thus have a problem of poor formability. For this reason, when manufacturing exhaust system parts having a thin and complex shape using stainless steel and steel, there is a problem that not only the raw materials but also the production costs are …
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K e y w o r d s : spheroidal graphite cast iron, impact toughness, artificial neural networks, thermal analysis 1. Introduction Spheroidal graphite cast iron (SGI), also known as ductile cast iron and nodular cast iron, is a kind of cast iron whose most important microstructural feature is the presence of graphite nodules in the metal matrix.
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By heating at this temperature, pearlite, the lowest-energy arrangement of steel, gets converted to ferrite and cementite. The graphite content of steel assumes a spheroidal shape after spheroidizing and after prolonged heating, the pearlite layers are broken down and spherical lumps of cementite, or spheroid, are formed.
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Broken stainless steel particles (marked by red dotted rectangles) are found on the bottom of the dimples. There is no doubt that the stainless steel particles release the stress concentration on the matrix, which reduces the possibility of fracture in the Al matrix and makes the force transfer to the stainless steel particles with better ...
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The wear oxide debris particles have been shown to form nano-structured glaze layers at a higher temperature to enhance wear resistance [3]. They shared the same viewpoint that the tribo-oxides play an important role in oxidative wear; tribo-oxides can form on worn surfaces and prevent the metal–metal contact and adhesion, thus reducing wear ...
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Keywords: spheroidal graphite cast iron, friction stir process, surface hardening, erosion wear, thermomechanical 1. Introduction Spheroidal graphite cast iron (also known as SG cast iron, ductile cast iron, ductile iron) is a common engineering material, because of its excellent castability, tensile ductility and thermal properties.
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Metallographic and microscopic x-ray spectrum analyses are used to study the special features of the microstructure of perlite-ferrite cast iron with spheroidal graphite. The internal polycrystalline structure of the spheroidal graphite is discussed, and the presence of ferrite precipitates over the boundaries of pyramidal crystals forming spherulites is proved. …
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Spheroidal graphite cast iron, which is commonly used in a variety of applications, is subject to sliding wear and tear during operation. This damage can be prevented by increasing its strength value. In this study, 0%, 0.191%, and 0.304% niobium-reinforced spheroidal graphite cast irons were produced. Specimens for hardness, compression, and abrasion tests were …
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In this study, the effect of welding temperature on the weldability in diffusion welding of martensitic (AISI 420), stainless steel with ductile (spheroidal graphite-nodular) cast iron was ...
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Due to the presence of spheroidal graphite in ductile iron, the mechanical properties of welding joints between ductile iron and mild steel are poor. ... (FCD450) and ferritic stainless steel (SUS430) by using three different nickel mass fractions of welding wires, the tensile strength is 205 ∼ 242 MPa, which is about 45 %∼54 % of the base ...
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The reaction behavior at the contact interfaces between cast steel or spheroidal graphite cast iron (SGCI) containing large amounts of manganese and molten aluminum alloys was investigated through shear testing of specimens prepared by holding contact between ferrous materials and molten aluminum alloys and then cooling. Specimens made of high-manganese …
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To address this challenge, we propose a deep learning-based approach using DeepLabv3+ (a semantic segmentation network) to extract advanced semantic information …
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Different from compacted graphite cast iron, the failure behavior of spheroidal graphite cast iron is characterized by the curved crack front, mainly due to the stronger plasticity induced crack …
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In this study, spheroidal graphite cast iron (FCD) and stainless steel (SUS) were welded by metal active gas (MAG) welding method using three kinds of Fe-Ni-Cr types welding wires with different nickel and chromium equivalents. After welding, the test specimens were heat-treated at 1023K, 1073K and 1123K in air atmosphere.
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The resulting spheroidite structure is a microstructure that contains sphere-like cementitie particles. Spheroidite is known as the most ductile and machinable form of steel. ... The graphite content of steel assumes a spheroidal shape after spheroidizing and after prolonged heating the pearlite layers are broken down and spherical lumps of ...
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When a ferritic Spheroidal Graphite Cast Iron(SG iron) is submitted to a large tensile load, the graphite nodules in the iron are deformed into oval shape. It has been recognized that a large deformation under tensile stress produces a kind of voids at the graphite edges. However, the …
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Stainless steel casting; iron casting Menu Toggle. Ductile Iron Casting; Gray Iron Casting; Aluminium casting ... 11:32 am No Comments Introduction to Spheroidal Graphite Iron. Spheroidal Graphite Iron, also known as SG Iron, is a special engineering material. It has a unique nodular graphite structure. This structure prevents cracks and boosts ...
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Spheroidal Graphite Iron is sometimes referred to as Ductile Cast Iron, Nodular Cast Iron, and Spherulitic Graphite Cast Iron. Ductile iron rolls or S.G. iron (nodular) are offered in a variety of compositions and hardnesses for use in a …
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on spheroidal graphite cast irons (SGI), reference will be made her e and there to lamellar graphite cast irons (LGI) when the defect is more pronounced ther e and allows its origin in SGI to be ...
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The least change was seen in hardness, while the most change occurred in elongation. With the same basic chemical composition, the properties of the material produced by changing only the graphite ...
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A kind of spheroidal graphite cast-iron multiple tube of inner liner stainless steel, it is related to spheroidal graphite cast-iron composite pipe field, including ductile iron pipe, stainless steel bushing pipe is provided with ductile iron pipe, stainless steel bushing pipe is welded by ribbon spiral coiling, and the thickness of stainless steel bushing pipe is 0.1mm~3mm.Stainless steel ...
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OEM custom spheroidal graphite (SG) ductile nodular cast iron castings by sand casting process. Sand casting is a tranditional but also modern casting RMC is a metal foundry from China ... CNC machining, heat treatments and surface …
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Weldability of spheroidal graphite ductile cast iron was established using a cheap Ni-Fe and a high purity Ni electrode. A preheating treatment at 350 °C and an annealing treatment at 850 °C ...
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A ferritic spheroidal graphite cast iron (also named as SG cast iron, ductile cast iron, ductile iron) was treated with friction stir process (FSP) to harden the surface layer owing to a unique …
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The machinability of an experimental medium-carbon steel with a composition designed to promote rapid graphitisation during a high temperature anneal has been studied. The goal has been to explore alternative routes to a competitive free-cutting composition enabling less expensive steelmaking, manufacturing and recycling. Three starting microstructures prior to …
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Erosion of materials due to the impact of solid particles is strongly affected by the mechanical properties and microstructures of materials. The experiments in this study showed that maximum erosion occurred at impact angle of 20° for mild steel SS400 and 60° for spheroidal graphite cast iron FDI. This phenomenon has been referred to as the impact angle …
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Spheroidal graphite cast iron has excellent castability, good machinability, adequate wear resistance, high strength-to-weight ratio, high fatigue endurance, and a good combination of strength and toughness [[6], [7], [8]].Owing to these properties, they have been widely applied in the machinery and automobile industries for various structural components, such as machine …
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Furthermore, smaller graphite fragments are (re-)attached to the spherical graphite particles. All these mechanisms transform the more or less unporous graphite flakes into spherical materials, which contain a significant amount of porosity, in the range of 4–5% of closed pores and of up to 0.5% of open pores (referred to the total particle ...
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The present invention relates to a ferritic cast iron comprising spheroidal graphite containing, by mass percentage, the following. 3.4 to 3.8% carbon, 1.5 to 2.1% silicon, 0.25% manganese, 0.05% sulfur, 0.6% elements, the remaining iron (Fe) In order to obtain a notched impact energy of at least 20 J at a temperature of -10 ° C in the case of a ferrite-based cast iron containing …
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Spheroidal Graphite Iron castings offer significant advantages in terms of corrosion resistance and wear behavior, making them suitable for use in aggressive environments. The …
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Goodwin Steel Castings Ltd, although as the name suggests produce steel castings has a long history of the manufacture of ductile iron castings (DCI). Goodwin are very familiar with balancing ultimate tensile strength (UTS) and proof stress, with ductility over a range of section sizes in ductile iron, which will be a prerequisite for producing ...
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The results of the mechanical and SEM study of the friction welding of ductile iron with stainless steel are presented. The results of the EDS-analysis shows that the intensity of diffusion processes during friction welding of bainitic ductile iron (BDI) is larger than ferritic ductile iron (FDI). The SEM–EDS spectrometry showed also some enrichment of ductile iron with Cr …
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The mechanical properties of graphite flakes and spherulites in cast iron were measured by nanoindentation. The spherulites had a significantly lower Young's modulus and …
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The spheroidal graphite cast iron was austenitized at 900 °C for 20 min, cooled in oil, then tempered at 500 °C for 2 h, attaining tempered martensite and spheroidal graphite. The carbon steel and spheroidal graphite cast iron presented the same hardness (40 HRC), and their microstructures are shown in Fig. 1.
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Spheroidal graphite cast iron has rapidly become one of the most important engineering materials after its discovery some 70 years ago [1]. Since then, the casting of spheroidal graphite cast irons has ... This mold was instrumented with four Ø3 mm stainless steel sheathed K-type thermocouples whose locations are indicated in the figure ...
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Studies have been conducted on the structures and mechanical properties of spheroidal graphite cast iron (FCD400 and 600) and stainless steel (SUS304) welded joints, …
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