What are the benefits of recarburizer for foundry?

Recarburizer is a kind of non-ferrous metal products used to be carbon elements. Recarburizers can be divided into high purity graphite recarburizers, petroleum coke recarburizers, raw coal recarburizers, etc., forging recarburizers are specially designed for For the recarburizer products produced by the forging process, it is not enough to use the heating furnace to add metal materials to the furnace when the forging process is carried out. It is not enough to store the carbon element inside the molten iron. In this case, the carbon element is outflowing. As for the use of forging recarburizers to achieve product standards in molten iron, it is the carbon element composition. It is not difficult to see the key effects of forging recarburizers in forging. Next, we will discuss the forging recarburizers for everyone. What's the benefit? I heard that many forging masters who have been engaged for many years have seen it and they have shown that they are not clear!

Graphitization effect of unmelted particles in recarburizer for forging

The application of forging recarburizer in forging can reasonably transform into and promote high-purity graphite, the key to adding a proportion of forging recarburizer to molten iron, some of which are dissolved in molten iron, but there is still a part of undissolved forging The use of recarburizer will use high-purity graphite in the form of carbon and particles into the molten iron flowing water, in which there is no shortage of some large forging recarburizer particles, this kind of undissolved forging recarburization when the power is connected The agent will be absorbed in the furnace wall of the smelting furnace, but if the power is turned off, this undissolved forging recarburizer will float up. After inspection and observation, the tiny forging recarburizer particles will melt in the high-purity graphite. During the whole process, it floats in the molten iron even when the power supply is terminated.

This fine particle forging recarburizer is close to the chemical substances that make up the non-ferrous metal eutectic crystal nucleus. The floating forging recarburizer particles are beneficial to transform into high-purity graphite. The key is to avoid the white mouth caused by low temperature during forging. situation!

The particle size distribution of the recarburizer for forging is a key element that harms the melting of the recarburizer into the molten iron. Although the recarburization rate after 15 minutes is the same, the recarburization time of 90% of the recarburizer for forging is There is a big difference. It takes 13 minutes to apply the forging recarburizer without particle size distribution, 8 minutes to remove the silicon powder, and 6 minutes to remove the silicon powder and sand. This shows that The particle size distribution of the recarburizer for forging has a great hazard to the recarburization time. It is too good to infiltrate the silicon powder and sand when the content of the silicon powder is high.

The purpose of adding the recarburizer for forging in the whole process of the smelter is to increase the carbon content, so that it can expand the graphitization swelling and reduce the appearance of shrinkage porosity in castings. The recarburizer for forging is aimed at magnesium The utilization rate is also a key hazard. In addition, the carbon component of the molten iron is applied with the forging recarburizer, which can further the circulation of gray cast iron, which is beneficial to the feeding. After many experiments, it is concluded that the forging of the produced castings The recarburizer composition is c%+1/7si%>39%.