溫度與溶質效應對於方向性凝固製備錫鉛合金之顯微組織影響分析

Experimental Analysis of Thermal and Solutal Effects on the Microstructure of Directionally Solidified Lead-Tin Alloys

林宇凡(Yu-Fan Lin) ； 趙隆山(Long-Sun Chao) ； 張嘉麟(Jia-Lin Zhang)

《鑄造工程學刊》 44卷4期 (2018/12) Pp. 13-22

摘要

鑄造於工業上的應用根據加工材料的不同，發展出不同的鑄造方法和模具，使用方向性凝固所產生之微結構則可沿著固定方向成長，並控制晶粒大小，提高材料之機械性質與物理特性。本研究使用數種成分比例之錫鉛合金為材料，透過不同實驗參數與鑄造方法，探討凝固模式對於微結構之影響。並觀察微觀(Microscopic)顯微組織及巨觀(Macroscopic)組織，比較其優選方向控制情形、晶粒尺寸與型態、晶體成長的束縛控制和溫度梯度、成長速率之間的關係。

關鍵字

鑄造 ； 方向性凝固 ； 錫鉛合金 ； 金相組織

並列摘要

Foundry engineering has been widely applied in industrial manufacturing for hundred years. Especially for the casting technology, it still leaves a lot to be concerned. To improve the mechanical properties of the metal materials, directional solidification is recommended for controlling the grain morphology and the microstructure. In this study, tin-lead alloy is used as the casting material in directional solidification and sand casting experiments while the alloy concentration and cooling media are set to be the independent variables of different experiment groups. The solidified macrostructure and microstructure including the grain size, equiaxed zones and columnar areas are investigated among the different experimental parameters. Furthermore, the transient temperature field and the growth rates of the grains are also analyzed from the experimental data to discuss their effects on the directional solidification process.

並列關鍵字

Casting ； Metallography ； Microstructure ； Directional Solidification