The machining allowance size analysis of aluminum alloy heavy forgings also has relevant requirements for the material of heavy forgings, and steel billets cannot be forged as forgings. For parts with different shapes, a certain forging ratio shall also be guaranteed. Round steel with similar dimensions shall not be used for forging production. There are strict requirements on temperature, forging frequency and pressure during forging processing. The metal crystal in the heavy forging is more fine and the cutting structure is more compact, and the forging will not damage the metal fiber of its raw materials during processing and can make the metal lines more smooth.
These advantages of heavy forgings can not be obtained by talking about them, which mainly benefit from their strict technical requirements. The allowance size of heavy ring forging shall conform to international safety standards, and its material must be consistent with the material of the parts. The chemical composition shall also conform to the national unified standards and a material list shall be issued. The main way to reduce hydrogen content in steel is to conduct vacuum degassing or vacuum pouring for molten steel during steelmaking. For some forgings with higher requirements, electroslag remelting process can be used to further improve the purity of steel; Post forging heat treatment: dehydrogenation annealing to diffuse the hydrogen in the steel.