What is nodular in nodular cast iron?
What is nodular in nodular cast iron?
Nodular Cast Iron, also referred to as ductile iron or spheroidal graphite iron, is a group of irons in which the graphite forms as nodules (spherical) instead of flakes as in normal cast iron. Nodulizing elements, typically magnesium, are used to allow the solidification of the graphite into nodules.
What is nodular cast iron give its application?
Nodular cast iron is a material that has found a increasing number of applications in the automotive industry during the last decade. It has a static strength comparable to cast steels and a greater fatigue strength and ductility than grey irons.
What are the properties of nodular cast iron?
Nodular Cast Iron (hereafter called “NCI”) is an engineering material displaying high ductility, elastic modulus, mechanical strength and corrosion resistance; in addition, it has low cost and is easy to produce and machine1, and is thus widely used as a structural material.
How is nodular cast iron formed?
Nodular cast iron is made by inoculating the molten metal, just before casting, with a small amount of magnesium or cerium. This causes the free carbon in the finished casting to appear as rounded nodules of graphite, rather than as flakes.
What is an iron nodule?
Nodular (spheroidal graphite) cast iron Nodular iron is also called ductile iron. The graphite is present as tiny balls or spheroids. The formation of nodules or spheroids occurs when eutectic graphite separates from the molten iron during solidification.
What is the meaning of nodular?
: of, relating to, characterized by, or occurring in the form of nodules nodular lesions nodular melanoma.
Why is nodular iron used for crankshaft?
Nodular cast iron has been widely used as substitute for steel in crankshaft, connecting rod, gear and similar parts requiring high strength, good toughness, low cost, and high yield ratio. These parts are often scrapped owing to the wear and tear of work surfaces after a long working time.
Which material is used for manufacturing of nodular cast iron?
Cast iron with nodular graphite is an iron-carbon casting material with carbon being present in form of nodular graphite particles (Figure 1). It is also referred to as ductile iron.
Is nodular iron magnetic?
While cast iron is not thought of as being magnetic, it actually is.
How strong is nodular iron?
Compared with grey iron, nodular iron has an absolute advantage in intensity. The max tensile strength of nodular iron is 90k psi, while the max tensile strength of grey iron is only 35k psi. Nodular Irons are generally superior to grey irons, regarding their yield strength.
What are nodular deposits?
Calcified nodules contain deposits of calcium which are visible on imaging scans. This can happen when the body responds to infections such as tuberculosis and usually means a nodule is not cancer. Non-calcified nodules are classified as ground glass opacities, partially solid or solid nodules.
What is another name for nodule?
What is another word for nodule?
| lump | swelling |
|---|---|
| protuberance | bump |
| knob | node |
| knot | growth |
| excrescence | bulge |
