The oil immersion method of metal powder injection molding metallurgical products was introduced

Metal powder injection molding porous anti-friction products immersion oil is an important process, the new material found that this process can increase the metal powder injection molding metallurgical products corrosion resistance, improve wear resistance, extend its service life. After sintering, the iron-base oil-bearing bearing is immersed in oil, and the lubricating oil enters into the pores of the product. When the shaft rotates, dynamic friction and heat are generated between the bearing and the sleeve, so that the bearing temperature rises and the oil expands with heat. The oil flows out of the pores to the shaft and the sleeve and plays an automatic role in oil supply. MIM materials also prevent oxidation of metal powder injection molded products by impregnating them with oil.

Metal powder injection molding metallurgical products by dahong new material can be divided into ordinary immersion oil, heating immersion oil and vacuum immersion oil. Below small make up for you to introduce the following three methods of oil immersion:

Ordinary immersion: put the cleaned sintered products into the oil (generally 20~30) immersion. Under the capillary force of the product, the oil is immersed into the pores of the product. However, metal powder injection molding manufacturers found that this method of oil immersion efficiency is low, oil immersion time is long, need a few hours, so daihong new materials suggested that this method of oil immersion can be used in products with low oil content.

Heating oil bath: put clean the sintering products in 80 ~ 120 ℃ in hot oil soak for 1 hour. As the product is heated, the air in the connected pores expands, and some of the air is expelled. As it cools, the remaining air contracts, drawing oil into the pores. Daihong new materials MIM technical experts found that due to the good flow of hot oil, high lubricity, thus more oil can be immersed into the product. Therefore, the efficiency of the method is higher than that of the common method.

Vacuum oiled: clean up of the sintering products in vacuum box, sealed fit to - 720 - mm Hg, then to vacuum box into the oil, and then heated to 80 ℃, 20 ~ 30 minutes. Leading manufacturers in the MIM industry have found that the oil can be immersed in the product within 10 minutes because the air in the connected pores of the product is pumped out. This method has high oil immersion efficiency and high speed.

Dahong new materials found that in fact there is another way of vacuum oil, is to put the products in the vacuum box of air extraction, and then the preheated oil into the real empty box, the products covered, and then make the real empty box and the atmosphere connected, oil that quickly immersed into the product pores.

The above is small make up for you to introduce the metal powder injection molding metallurgical products immersion method, I hope you can find the most suitable way, if there are other questions, please consult dahong new materials technical team!