Inoculants introduction: Inoculants is a kind of can promote graphitization, reduce the tendency of white mouth, improve the morphology and distribution of graphite, increase the number of eutectic group, refine the matrix structure.
Ferrosilicon particle inoculant (special inoculant for casting)
Ferrosilicon particles namely ferrosilicon inoculant, used for steelmaking, ironmaking, casting a inoculant.
Features of ferrosilicon inoculant:
(1) The composition of ferrosilicon particles is uniform and the segregation is small;
(2) the ferrosilicon particle size is uniform, no fine powder, and the inoculation effect is stable;
(3) The inoculation effect of ferrosilicon particles is stronger than that of ordinary ferrosilicon particles, and the tendency to produce slag is also small;
(4) prolong the life of the mold and reduce the surface defects;
(5) Reduce the pinhole, improve the surface quality of the cast pipe, and improve the pass rate of the first delivery;
(6) eliminate apparent microshrinkage and improve the machining performance of castings.
Silica-barium (calcium) inoculant
Silica-barium inoculant ,(BA-SI)is the silicon powder and barium powder by mixing according to the proportion of demand, and then through the high temperature furnace steelmaking into bulk metallurgical materials.It is a kind of additive in the casting process of the foundry, which can promote graphitization, reduce the tendency of white mouth, improve the morphology and distribution of graphite, increase the number of eutectic groups, and refine the matrix structure.
Silica-barium inoculant function:
1, strongly increase the graphitization core, refine graphite, promote the gray cast iron to get A-type graphite, improve the strength, for ductile iron can make the graphite in the ductile iron fine, round, improve the grade of spheroidization.
2. It can effectively reduce the supercooling degree of molten iron, promote the precipitation of graphite, significantly reduce the tendency of white mouth, reduce the relative hardness, and improve the machining performance of casting.
3. Strong anti-recession ability, anti-recession time is 2 times of 75 silicon, the amount of silicon barium inoculant is less than half of 75 ferrosilicon inoculant, while preventing the associated spheroidification recession.
4, the wall thickness sensitivity is small, improve the section uniformity, reduce the tendency of shrinkage and looseness.
5, the chemical composition is stable, the processing granularity is uniform, the composition and quality deviation is small.
6. Melting point is low (less than 1300°), and it is easy to absorb and melt when inoculating, and scum is very few.
Post time: Jul-04-2022