the nitrogen content of various recarburizer

Nowadays, a large number of casting factories use a large number of recarburizer when producing cast iron, then how much is the nitrogen content require? How to choose the proper type?

Following introduce you more details about various types of recarburizer:

(1)Coal recarburizer: The nitrogen content varies depending on different of the quality of coal, typically from 2000 to 7000ppm, it is 0.2% to 0.7%.

(2)Ordinary calcined petroleum coke: because there is no high temperature calcined, the nitrogen content is generally around 1000pp, and the sulfur content is high, it can not draw clear traces on white paper.

(3)High temperature calcined graphitized petroleum coke, the nitrogen content is 300-500ppm, for high quality type the nitrogen content can reach 100ppm, the sulfur content is much lower like 0.05%.

(4)The graphite columnar recarburizer: which is using a graphite powder to add a binder, by extrusion into a cylindrical particle size. Such recarburizer is particularly in the form of graphite, it is good to absorb in the furnace.

If the recarburizer is not in good quality, the nitrogen content will be high, it is easy to cause nitrogen hole defects in castings. We say that nitrogen can strengthen the cast iron matrix, increase the strength, but because the synthetic cast iron matrix, increase the strength, but because the synthetic cast iron scrap is added, the iron nitrogen content has been in the upper limit, at which time the suppression if the nitrogen content continues to be high, it is easy to cause a nitrogen-hole waste of castings.

The casting plant should choose the right recarburizer according to their own production demand, Anyang Huatuo Metallurgy has been engaged in the production and sales of recarburizer for more than 10 years, it serves a variety of specification of the recarburizer, there is always a suitable type for you.