Purpose and requirements for heating aluminum alloy forgings

Heating before forging is an indispensable part of the whole forging process, which has a direct impact on improving forging productivity, ensuring forging quality, saving energy consumption and reducing product cost. The purpose and requirements of forging heating are as follows:

1. Heating purpose

It can improve metal plasticity, reduce metal deformation resistance, make it easy to form, and obtain good microstructure and mechanical properties after forging.

2. Heating requirements

1. Under the conditions of temperature conductivity and internal stress allowed by metal materials, heat to the predetermined temperature as soon as possible to improve efficiency and save energy.

2. Try to reduce the absorption of oxygen, hydrogen, nitrogen and other harmful gases, reduce oxidation, decarburization or hydrogen embrittlement and other defects, and improve the heating quality.

3. In the low temperature heating stage, excessive temperature difference between the outer layer of the metal section and the heart should be prevented, which will lead to excessive thermal stress, and then other internal stresses will be superimposed, leading to material fracture.

4. Accurately implement the given heating specifications, such as heating temperature, speed, time, insulation and other heating conditions, to prevent overheating, overheating and other defects.