Preparation Process Of High-temperature Alloys

1. Casting Metallurgical Process
Various advanced casting manufacturing technologies and processing equipment are constantly being developed and improved, such as thermal controlled solidification, fine grain technology, laser forming repair technology, wear-resistant casting casting technology, etc. The original technical level is constantly improving and improving to improve the quality consistency and reliability of various high-temperature alloy casting products.
High temperature alloys without or with little aluminum or titanium are generally smelted in electric arc furnaces or non vacuum induction furnaces. When high-temperature alloys with high aluminum and titanium content are melted in the atmosphere, element burning loss is difficult to control, and gas and inclusions enter more, so vacuum smelting should be used. In order to further reduce the content of inclusions, improve the distribution of inclusions, and improve the crystal structure of the ingot, a dual process combining smelting and secondary remelting can be adopted. The main methods of smelting include electric arc furnaces, vacuum induction furnaces, and non vacuum induction furnaces; The main methods of remelting include vacuum consumable furnaces and electroslag furnaces.
Solid solution strengthened alloys and alloy ingots with low aluminum and titanium content (the total amount of aluminum and titanium is less than 4.5%) can be forged into billets; Alloys containing aluminum and titanium generally need to be extruded or rolled into billets, and then hot-rolled into products. Some products require further cold rolling or cold drawing. Alloy ingots or cake materials with larger diameters need to be forged using a hydraulic press or fast forging hydraulic press.