Due to low ductility, high deformation resistance, strain-rate sensitivity, and narrow forging temperature ranges, magnesium alloys are typically forged using hydraulic forging presses or slow mechanical forging presses.

• Hydraulic press forging: deformation rate up to 60%–90%

• Forging hammers or high-speed presses: deformation rate must be reduced by 50% or

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  Forging Dies
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  Most magnesium alloy open-die forgings are formed on flat or shaped anvils; rings and round parts can also be processed via ring rolling. Tools must be preheated to maintain the final forging temperature.
   

  Magnesium alloy die design generally follows aluminum alloy forging standards, but poor fluidity favors single-cavity die forging. Complex large-scale magnesium alloy forgings should first be preformed by open-die forging, then finished in single-cavity dies.
  Die material: low-alloy hot-work die steel. Working surfaces must be precision-ground to reduce roughness, promoting smooth metal flow and preventing surface defects. Magnesium alloys have lower deep-cavity filling capability than aluminum alloys.
  
  
  
   

  Common Defects and Control
  
  Typical defects include coarse grain rings, transgranular cracking, surface corrosion, and oxidation. Medium- and low-ductility magnesium alloys are highly strain-rate sensitive; surfaces tend to crack along maximum shear stress during upsetting.

  • Use slow hydraulic presses for forging

  • If using faster presses or hammers: apply light, slow blows at the initial stage

  • Maintain sufficient forging temperature and consistent die-to-billet temperature to avoid

    brittle phase precipitation

  • Strictly control trimming processes to prevent trimming cracks
    
     

    As a magnesium alloy material supplier, Hilbo Magnesium Alloy Material Co.,Ltd focus on optimized forging processes, stable quality control, and customized magnesium alloy sheet and plate solutions to support automotive, aerospace, electronics, and industrial lightweight applications.

    For technical inquires:scm@hilbo-mg.com