Introduction of infiltration process of inorganic and organic infiltration agents

The infiltrant is a liquid substance prepared from several inorganic substances or dozens of organic substances to seal castings or powder metallurgy parts in which microporous defects occur. Divided into inorganic infiltrant and organic infiltration agent.

The first use of inorganic impregnation agent for infiltration treatment (Metal Impregnation), and later developed an organic infiltration agent, due to many advantages, many companies use organic infiltration agents instead of inorganic infiltration agents, organic infiltration agents through After 3 upgrades, the 2nd and 3rd generation organic infiltrants are widely used. Due to the poor impregnation effect of the inorganic infiltrant, the use is greatly reduced, but the cost of eliminating the infiltration equipment and the infiltrant is high. Therefore, some enterprises in China and some developing countries still use inorganic infiltration agents, and with the development of social economy, the use of inorganic infiltration agents will be gradually reduced.

Inorganic casting impregnating trapping agent (inorganic casting sealant) is more resistant to heat than organic casting impregnating sealant, so in some cases it is not possible to replace inorganic casting sealant with organic casting impregnating trapping agent. Other informal inscriptions of infiltrants, such as casting trapping agents, casting trapping fluids, etc., because many manufacturers do not come into contact with infiltration and trapping, so there are many other examples such as casting trapping glue, casting sealant, casting sealant and so on.

Infiltration process:

In the process of manufacturing die-casting parts and powder metallurgy parts, a large number of micropores, blisters and cracks are inevitably formed due to gas residue, crystal shrinkage, etc., and micropore leakage brings hidden dangers to the use of machinery and equipment, that is, use For applications without pressure requirements, plating, painting and other surface treatments may cause internal corrosion due to plating solution, acid solution, etc., which may cause internal corrosion, which may shorten the service life of the parts due to the presence of micropores. Or bumpy.

The application of infiltration technology on the production line has become an industry consensus. At present, many companies have included infiltration as an indispensable process into the process documentation. The impregnation is carried out by vacuum pressing, so that the impregnating glue is immersed in the looseness of the casting, the pores and the like, and is solidified to fill the micropores of the casting, thereby solving the leakage problem and achieving the purpose of sealing pressure.