Heat treatment technology of free forgings

The forging and heat treatment process of free forgings adopts the following raw materials in percentage by weight: CR0 5%-1.0%, Mg5. 0%-7.5%, Zn0. 05%-0.10%, Ti0. 03%-0.05%, Cu1. 5%-2.0%, Fe0. 10%-0.15%, slag remover 3.5%-5.0%, and the rest is al. The slag remover can remove hydrogen and floating oxide slag from aluminum alloy liquid, making the alloy liquid more pure. It has strong adsorption performance, can adsorb slag and improve the purity of aluminum alloy. Moreover, the chemical structure of sodium hexafluoroaluminate is similar to that of alumina.

On the one hand, they can dissolve each other at high temperature, on the other hand, they can improve the surface tension when they contact with aluminum melt, and then remove alumina from aluminum alloy melt; The addition of sodium fluoride can corrode the metal on the interface between alumina and aluminum, make the oxide film fall off and fall into the flux, and then purify the aluminum alloy.