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How to choose the suitable ball of chemical agent

Date:2017-05-15    Browse times:    

he agent can promote the formation of graphite in nodular graphite cast iron. General application field, cast iron casting. But there are a lot of kinds and content of the market, so it is very important to choose the appropriate.

The data from the spheroidizing elements in liquid iron reaction thermodynamics, reaction kinetics and spheroidizing agent production process quality influence factors, foundry process using process factors, put forward the following decision spheroidizer quality standards:

(1) the affinity of the elements such as sulfur and oxygen in the molten iron. Affinity, and with the formation of compounds, as the molten iron solidification process outside the core, such as rare earth, magnesium, calcium and other elements of the ball.

(2) the ability to change the shape of the graphite from a flake into a ball.

(3) the density and boiling point of the sphere is lower than that of the liquid. The density is small, and the boiling point of the liquid is lower than the iron liquid treatment temperature, and the magnesium can be converted into a gas state in the treatment temperature, and has the self stirring action to improve the effect of the ball.

(4) in the ball of the agent in the content of 10% magnesium content of or so.

(5) the densification of the ball, no segregation, shrinkage porosity, no powder.

(6) spheroidizer uniform particle size distribution, no powder alloy, deformation of the particles as well more obtuse.

(7) the above conditions basically cover the quality requirements of the production and use of the ball, so it can be used as the quality of the two sides to determine the quality of the unified standard.

Spheroidizing agent as an additive iron industry is widely used, the quality and performance of spheroidizer is very important, therefore, based on the choice of quality products, in accordance with the added use of instructions, to achieve the best effect.

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