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Inoculation treatment of 100 ton ductile iron casting

75sife alloy is the most widely used inoculant at home and abroad. The composite inoculant composed of Ca, Ba, Sr and rare earth elements added on the basis of 75sife alloy can prolong the inoculation decay time and improve the microstructure and properties of castings, especially for large section...

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Research methods of large section ductile iron castings

(1) Modulus method: in 1986, when Lin Rui of Harbin University of science and technology was developing the large section ductile iron end cap, he poured the cube with the same modulus as the end cap casting under the same production conditions. By studying the solidification characteristics of the...

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Casting and heat treatment of ductile iron piston

Ductile iron piston is mainly used in medium speed diesel engine. It is the key component of diesel engine. It needs to bear high compressive stress and thermal alternating load when working, and its working condition is very bad. Because the piston works at high temperature, metal parts are...

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Casting heat treatment process of ductile iron piston

Normalizing ductile iron piston Normalizing, also known as normalizing, is to heat the workpiece to Ac3 or Accm above 30~50 C for a period of time, and then remove the metal heat treatment process from the furnace in the air or spray water, spray or blow cooling. The difference...

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Casting technology of ductile iron piston

The casting properties of ductile iron have the following characteristics ① The content of sulfide and oxide in molten iron is high. In addition, oxides are easily produced if exposed to air and gas. ② Graphitization expansion is easy to cause casting swell, and the dimensional accuracy is easily...

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