目的：本研究旨在於設計一種符合製作高爾夫鑄造（cast）鐵桿頭之金屬合金，其具有高抗拉強度（超過150 ksi以上）與延伸率20 ~ 30%、耐蝕性佳等，且可降低鑄造原件成本提升獲利空間。方法：設計之鐵-13鉻-2鎳合金係以8620與431不鏽鋼合金混鍊而成，利用高週波感應爐在大氣狀態下進行熔煉與冷卻，共完成36試片鑄造原件，隨機分為4組（鑄造原件、1040°C、980°C、830°C）各9片，分別進行不同溫度熱處理加工1小時後，再以氮氣冷卻。完成後分別進行機械性質（各6片）、抗腐蝕能力（各1片）、顯微光學結構分析（各2片）等試驗。結果：一、鐵-13鉻-2鎳合金經單因子變異數分析，以熱處理1040°C/1H N2冷卻所得之機械性質顯著優於其他溫度，其抗拉強度為194.2 ksi，降伏強度為171.9 ksi，延伸率為10.01%，硬度為38.9。二、由SEM（scanning electron microscope）與EDS（energy dispersivespectroscopy）顯微光學結構觀察，在1040°C的高溫熱處理後，合金金相結構獲得改善，顯微結構具有麻田散鐵（martensite）與沃斯田鐵（austenite）之雙相組織。三、合金為降低成本係以簡單製程與熱處理加工，經成本估算後與目前商用鐵桿頭合金素材比較約降價10 ~ 20%，且具有良好的抗腐蝕能力。結論：本研究設計之鐵-13鉻-2鎳合金具備做為市售鑄造鐵桿頭所需之機械性質、抗腐蝕能力與成本降低提升獲利的高爾夫鐵桿頭材料的條件。

Objective: This research designs a type of metal alloy suitable for the production of cast iron golf club heads. It has a high tensile strength (greater than 150 ksi), an elongation of 20-30%, and a good corrosion resistance value. In addition, it reduces costs of materials and increases the potential for profits. Method: Design Iron (Fe)-13 Chromium (Cr)-2 Nickel (Ni) alloy by mixing stainless alloy 8620 and 431. Use high frequency induction furnace to perform melting and cooling under an atmospheric state. A total of 36 samples are produced and randomly assigned into 4 temperature groups (original, 1040°C, 980°C, and 830°C) with 9 samples in each group. Later, each temperature group went through 1 hour heat treatment. Then, the alloy is cooled with Nitrogen (N2). Experiments are performed on the finished alloy, including mechanical property analysis (6 samples from each group), corrosion resistance analysis (1 sample from each group), and light microscopy (SEM, EDS; 2 samples from each group). Results: (1) One way ANOVA on Fe-13Cr-2Ni alloy shows that a heat treatment of 1040°C followed by 1 hour N2 cooling results in better mechanical properties than other temperatures did. The tensile strength is 195.6 ksi, the yield strength is 174.1 ksi, the elongation is 10.27%, and the hardness (HRc) is 39.9. (2) Using SEM and EDS, it was observed that after the heat treatment of 1040°C, the metallography of the alloy was improved. The microstructure showed a duplex structure of marquisate and austenite. (3) To reduce costs, the alloy goes through simple production and heat treatments. The estimated material cost is 10%-20% lower than the alloy used for current commercial golf club heads. It also has a better corrosion resistance value. Conclusion: The Fe-13Cr-2Ni alloy in our study meets the material requirements for case iron golf club heads on the market, including mechanical properties, corrosion resistance value, and the need for lower costs and higher profits.