Spheroidal Graphite Cast Iron - an overview - ScienceDirect
In the conventional casting procedure, cast iron generates a flaky shape (a) in the iron matrix. However, when a special modification treatment is implemented on the molten iron just before pouring, graphite becomes round (b). Cast iron having this shape is called spheroidal graphite cast iron or nodular cast iron. The additive for ...
Spheroidal Graphite Cast Iron - an overview - ScienceDirect
Nodular, or spheroidal graphite (SG) cast iron contains graphite spheroids in the as-cast state, by the addition of cerium and/or magnesium to the iron, as illustrated in Fig. 3.30. These SG irons can be made with a pearlite matrix or ferrite with appropriate heat-treatment, or with acicular or austenitic matrix when suitably alloyed, and they ...
Spheroidal graphite cast iron (cast iron with nodular graphite ...
Spheroidal graphite cast iron is a cast iron material in which the graphite is spherical due to the introduction of magnesium into the liquid cast iron. This significantly improves the strength and toughness of the material and can achieve almost steel-like properties.
Full spheroidal graphite structure was observed in Die casting sample. The representative microstructure is shown in Fig. 7. Most of spheroidal graphite was ultrafine (Fig. 7(a)). The range of SG D was 4³9µm and the average SG D was 7µm. Larger spheroidal graphite nodules exist but their diameters remain at about 15µm. These were assumed to be
graphite cast irons (FCD) made by various castings using ‘‘RPFM’’ which used only silica sand and water, a ‘‘Green sand mold’’ which used green sand that was a mixture of silica sand, clay, moisture, and other additives, and the ‘‘CO 2 process mold’’ which employed a mixture of sand and a liquid silicate binder.
球墨铸铁的凝固形貌——球墨铸铁基础理论的最新发展 (四)-【维普 …
The macro-and micro-solidification characteristics of spheroidal graphite iron(s.g.iron),the solidification morphology characteristics of thin-section and heavy-section s.g.iron,as well as the relationship between thickness of s.g.iron castings and their solidification ...
Classification of graphite particles in metallographic images of cast ...
2024年11月1日 · The three main cast iron grades used in practice are known as SGI (for spheroidal graphite cast iron), CGI (compacted graphite) and LGI (lamellar graphite). Depending on the requirements, SGI must contain more than 80 % to 90 % graphite of ISO class V-VI.
Understanding the Metallurgy of Spheroidal Graphite Cast Iron ...
2024年7月13日 · The spheroidal, or nodular, form of graphite in this iron gives it excellent strength, ductility, and toughness, distinguishing it from traditional gray cast iron. This article delves into the metallurgy of Spheroidal Graphite Cast Iron, focusing on its composition and microstructure analysis.
Understanding the Metallurgy of Spheroidal Graphite Cast Iron …
2024年3月28日 · The unique metallurgical properties of Spheroidal Graphite Cast Iron arise from its distinct microstructure, which includes spherical graphite nodules in a ferritic or pearlitic matrix. Let’s delve into the key aspects of Spheroidal Graphite Cast Iron’s metallurgy and how it translates to industrial applications.
Spheroidal-graphite cast iron as an engineering material: …
Spheroidal-graphite cast iron is a fairly new material characterized by high strength, toughness and good casting and machining qualities. The mechanical properties of the conventional types of cast iron containing flake graphite are considerably imp