熱室壓鑄ZA-8鋅合金機械性質之探討

Study on Mechanical Properties of Hot Chamber Die Casting ZA-8 Zinc Alloy

胡瑞峰(J. F. Hu)；王永良(Y. L. Wang)；陳國祥(K. H. Chen)；施忠易(Z. Y. Shi)

熱室壓鑄 ； ZA-8鋅合金 ； 機械性質 ； 顯微組織 ； hot chamber die casting ； ZA-8 zinc alloy ； mechanical property ； microstructure

鑄造工程學刊

49卷2期（2023 / 12 / 01）

9 - 18

繁體中文;英文

本研究主要目的是在探討熱室壓鑄條件對具有高耐潛變能力的ZA-8鋅合金熱室壓鑄件機械性質如抗拉強度、硬度以及顯微組織之影響，熱室壓鑄條件包括澆鑄溫度、鑄造壓力和模具溫度等製程參數。而研究結果顯示，欲獲致較佳的ZA-8鋅合金熱室壓鑄件機械性質之熱室壓鑄條件為澆鑄溫度424℃、鑄造壓力100kg/cm^2和模具溫度150℃。此外，ZA-8鋅合金熱室壓鑄件內樹枝狀初晶β相晶粒大小與孔洞率變化則會影響其鑄件的機械性質。

This study is mainly to investigate the effect of hot chamber die-casting conditions on the mechanical properties such as tensile strength, hardness and microstructure of ZA-8 zinc alloy with high creep resistance. The process parameters of hot chamber die-casting include pouring temperature, casting pressure and mold temperature. The study results show that the hot chamber die casting conditions to obtain better mechanical properties of ZA-8 zinc alloy die-castings are 424℃ pouring temperature, 100 kg/cm^2 casting pressure and 150℃ mold temperature. In addition, the grain size of dendritic primary β phase and porosity of ZA-8 zinc alloy hot chamber die-castings were measured and analyzed to correlate the mechanical properties of castings.