ng is selected according to the precision and structure required by the product.

(7) Vibration grinding: In order to increase the friction of the surface of some powder metallurgy parts, reduce the roughness of the product, achieve the required surface precision, and obtain a bright appearance, it is necessary to choose vibration grinding, using "grinding stone + water + cutting". liquid" method.

(8) Quenching: Use high-frequency heat treatment to spray water-soluble quenching liquid on the heated workpiece by water quenching.

(9) Tempering: water vapor is introduced into the tempering furnace under the condition of 600 degrees to form a layer of oxide film of ferric oxide to achieve the purpose of rust prevention of the product. Purify.

Description of the production process that produces hazardous waste:

Machining and vibration grinding processes produce waste cutting fluid, sludge containing cutting fluid, and hazardous waste in 200L iron drums;

High-frequency quenching process produces waste quenching liquid hazardous waste;

The cleaning process produces waste cleaning agent hazardous waste, and the activated carbon adsorption device of the cleaning machine produces waste activated carbon hazardous waste;

Hazardous waste of waste ion exchange resin produced by the softening water preparation device of the tempering furnace boiler;

The mechanical maintenance of the forming and shaping press produces hazardous waste of waste hydraulic oil;

The oil immersion process of sintering furnace produces waste antirust oil hazardous waste.