Nodulizer&inoculant
Introduction
Nodulizers and Inoculants are crucial additives for producing high-performance ductile iron and gray iron. Nodulizers promote the formation of spherical graphite nodules, significantly enhancing the material's strength and toughness. Inoculants effectively refine the grain structure, preventing chill (carbides) and improving machinability.
| Brand |
RE |
Mg |
Ca |
Si |
Mn≤ |
Ti≤ |
|
FeSiMg6Re1 |
0.5～＜2.0 |
5.0～7.0 |
1.5～3.0 |
44.0 |
1.0 |
1.0 |
|
FeSiMg7Re1 |
0.5～＜2.0 |
6.0～8.0 |
≤1.5 |
44.0 |
1.0 |
1.0 |
|
FeSiMg7Re3 |
2.0～＜4.0 |
6.0～8.0 |
2.0～3.5 |
44.0 |
1.0 |
1.0 |
|
FeSiMg8Re3 - A |
2.0～＜4.0 |
7.0～9.0 |
≤2.0 |
44.0 |
1.0 |
1.0 |
|
FeSiMg8Re3 - B |
2.0～＜4.0 |
7.0～9.0 |
2.0～3.5 |
44.0 |
1.0 |
1.0 |
|
FeSiMg8Re5 |
4.0～＜6.0 |
7.0～9.0 |
≤3.0 |
44.0 |
2.0 |
1.0 |
|
FeSiMg8Re7 |
6.0～＜8.0 |
7.0～9.0 |
≤3.0 |
44.0 |
2.0 |
1.0 |
|
FeSiMg10Re7 |
6.0～＜8.0 |
9.0～11.0 |
≤3.0 |
44.0 |
2.0 |
1.0 |
|
FeSiMg8Re18 |
17.0～＜20.0 |
7.0～10.0 |
≤3.0 |
42.0 |
4.0 |
2.0 |
Production Process
Selected high-quality raw materials -> precise proportioning and mixing -> smelting in an electric arc furnace -> casting, crushing -> screening into specified sizes -> packaging after strict QC.
Applications
Ductile Iron Castings: Widely used in automotive parts (crankshafts, hubs), wind power castings, water pipes/fittings, and machine tool bodies-applications demanding high mechanical properties.
Inoculated Grey Iron: Used to produce high-quality grey iron, improving its mechanical properties and machinability.
Features
Nodulizer: Typically uses magnesium as the core element, with rare earths to enhance anti-fade capability. Offers stable nodulizing effect and a controlled reaction.
Inoculant: Often uses ferrosilicon as a base, enhanced with elements like calcium, barium, or strontium. Promotes graphite nucleation effectively, though the effect is time-sensitive.
Customized Composition: Formulas can be tailored based on specific molten iron chemistry and casting requirements.
Precise Granularity: Strictly controlled particle size ensures rapid melting and uniform absorption upon addition.
FAQ
Q: Can nodulizer and inoculant be added at the same time?
A: No. The standard process is to add the nodulizer first for the nodulizing treatment, followed by the inoculant just before or during pouring for the inoculation treatment.
Q: How to choose the right inoculant?
A: Selection depends on molten iron composition, casting wall thickness, and cooling rate. For example, barium-based inoculants offer better fade resistance for heavy sections, while strontium-based types are preferred for thin walls to prevent chill.
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