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In this study, the mechanisms of thermal fatigue leading to the failure of AISI H10 shot-sleeves used for high pressure die casting (HPDC) of brass parts were investigated. During operation, the shot-sleeve undergoes heating and cooling cycles, reaching temperatures between 320 ℃ and 950 ℃ at the contact surface with the molten brass. Analysis of defective shot-sleeves revealed a crack network on the inner surface, indicating thermal fatigue as the main cause of failure. To better understand the mechanisms leading to thermal fatigue, numerical simulations were performed using Abaqus® FE code. The thermal FE model was validated by experimental temperature measurements on in-service shot-sleeve. The study compared the temperature in the shot sleeve when casting 0.5 kg and 2 kg of liquid brass alloy at 950 ℃ to understand how the quantity of liquid metal can affect the temperature values and distribution, and to support the experimental results.

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Comparative Study on the Impact of Cast Brass Quantity on the Thermal Fatigue of Shot Sleeves in High-Pressure Die Casting

  • 会议论文

  • 发表日期：

    2025年

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  • Dorra Abid,
  • Ahmed Ktari,
  • Nader Haddar

摘要

In this study, the mechanisms of thermal fatigue leading to the failure of AISI H10 shot-sleeves used for high pressure die casting (HPDC) of brass parts were investigated. During operation, the shot-sleeve undergoes heating and cooling cycles, reaching temperatures between 320 ℃ and 950 ℃ at the contact surface with the molten brass. Analysis of defective shot-sleeves revealed a crack network on the inner surface, indicating thermal fatigue as the main cause of failure. To better understand the mechanisms leading to thermal fatigue, numerical simulations were performed using Abaqus® FE code. The thermal FE model was validated by experimental temperature measurements on in-service shot-sleeve. The study compared the temperature in the shot sleeve when casting 0.5 kg and 2 kg of liquid brass alloy at 950 ℃ to understand how the quantity of liquid metal can affect the temperature values and distribution, and to support the experimental results.