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ductile iron

  • Author:naky
  • Source:www.diecastingpartsupplier.com
  • Release on:2014-12-17
ductile iron

Ductile iron is to get through the ball and spherical graphite inoculation , effectively improve the mechanical properties of cast iron , especially to improve the ductility and toughness, resulting in higher than carbon steel Strength . Ductile iron is the 1950s developed a high-strength cast iron materials, its overall performance is close to steel , is based on its excellent performance , has been successfully,Some complicated
forces for casting , strength , toughness, wear resistance demanding parts . Ductile iron has been behind the rapid development of gray cast iron , cast iron material is widely used ,Material . The so-called " iron and steel" , mainly referring to ductile iron.

Composition structure

Cast iron is the carbon content greater than 2.11% of the iron-carbon alloy , by industrial pig iron, scrap steel and alloys such as high temperature melting and casting to obtain , in addition to Fe, also contains C, Si, Mn, S, P , and other alloying elements such as the five elements.

Cast in the form of carbon graphite precipitation , precipitation of graphite cast iron called if the article was flaky when gray cast iron or gray cast iron, cast iron worm-like form when called compacted graphite iron , was when floc,The cast is called white cast iron or code , but was called ductile cast iron sphere when .

Spheroidal graphite split acting metal matrix graphite is smaller than other shapes , make -strength cast iron reaches 70 to 90% matrix structure strength , the tensile strength of up to 120kgf / mm2,And has good toughness.

Ductile iron is usually outside the chemical composition : 3.0 to 4.0% carbon content , silicon content of 1.8 to 3.2% manganese , phosphorus , not more than 3.0%, the total amount of sulfur and a suitable amount of rare earth , magnesium and other ballElements .