The immersion process of powder metallurgy products how to operate?

Powder metallurgy products are formed by multiple processes, including porous antifriction oil products is very important a. It increases the powder metallurgy products, corrosion resistance, abrasion resistance, and prolong its service life. Therefore, we should strengthen the understanding of its.

The operating principle is the iron base oil bearing sintering after oil immersion treatment, powder metallurgy products into the pores of lubricating oil. When the axial rotation, and occurrence of dynamic friction heat; the bearing temperature rise, oil case of thermal expansion; from the pores in the outflow to shaft and the shaft sleeve to automatic oil supply, the formation of oil film on lubrication and reduce friction. This method of ordinary oil immersion and vacuum immersion in oil and heating oil branch.

1, ordinary immersion

Cleaned sintered products into the oil soak. The capillary force in oil, into the pores of the products. The method of immersion time, immersion efficiency is low, it usually takes several hours, suitable for oil products is not high in rate.

2, vacuum oil immersion

Clean up clean products sintered in vacuum box, sealing time to -720 mm Hg, then add oil to the vacuum box, and then heated to eighty degrees Celsius, keep twenty minutes to half an hour. Since the products connected pores in the air was pumped out, the oil can be in ten minutes in products.

Vacuum oil immersion can also to put products in vacuum box of air out, and then the preheated oil into the vacuum box, product is covered up, then the atmospheric and vacuum box connected, the oil that is quickly immersed into products pore in. By this method the immersion of high efficiency and fast speed

3, heating oil

The removal of sintered products clean to soak for eighty to one hundred and twenty degrees Celsius hot oil in an hour. Because the product is heated, the air in the pores is expanded, so that part of the air is excluded. After cooling, the remaining part of the air is contracted, and the oil is sucked into the pores. Because oil has good fluidity, high lubricity, and thus may be more oil immersed into products.