頁籤選單縮合
題 名 | 鎳對片狀石墨鑄鐵硬度均勻性之影響=Effects of Ni Addition on the Uniformity of Hardness for the Flake Graphite Cast Iron |
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作 者 | 楊榮顯; 呂易諠; | 書刊名 | 鑄造工程學刊 |
卷 期 | 39:4=159 2013.12[民102.12] |
頁 次 | 頁8-19 |
分類號 | 472.2 |
關鍵詞 | 鎳; 片狀石墨鑄鐵; 表面中心剖面; 硬度; 硬度標準差; 均勻性; Nickel; Flake graphite cast iron; Surface & center cross section; Hardness; Hardness standard deviation; Uniformity; |
語 文 | 中文(Chinese) |
中文摘要 | 具有不同厚度鑄件,凝固冷卻後因顯微組織差異之關係,極易造成表面及內部硬度不均之現象。而此硬度之均勻性與否,會直接影響其機械加工性、表面粗糙度、機械性質等,更進而影響鑄件組立後所構成單元、成品等之精度、壽命等。本研究即在探討添加Ni(0~3.0wt.%)時,其對於片狀石墨鑄鐵鑄件不同厚度部位(10、20、40、80mm)之表面及中心剖面平均硬度之均勻性之影響。研究結果顯示,隨著Ni添加量之增加,鑄件各不同厚度部位之中心剖面與表面之平均硬度有上升趨勢,但效果沒有很顯著。另方面,Ni之添加對於鑄件各不同厚度部位之中心剖面及表面平均硬度之均勻性卻有明顯的改善,例如在中心剖面當Ni之添加量為0 wt.%及3.0 wt.%時,鑄件各不同厚度部位(10、20、40、80mm)之平均硬度標準差之減少值分別為0.039、0.032、0.030、0.018。由此可知,鑄件厚度越小時,Ni之添加對平均硬度標準差之減少效益愈大,亦即對硬度之均勻性之改善效果越顯著。 |
英文摘要 | Casting with different thickness portions will cause diverse metallographic microstructure at each after solidification and cooling, and easily induce non-uniform surface and cross section hardness. The uniformity of hardness will affect the machinability, surface roughness, mechanical properties, etc., directly. Moreover, it will affect the precision and life of the assembled unit or product by the castings.The objective of this research is to investigate the effects of the uniformity of surface and center cross section hardness of flake graphite cast iron castings with different thickness portions (10、20、40、80mm) by adding small amount (0~3.0 wt.%) of alloying element nickel.The experimental result shows that average surface and center cross section hardness of casting with different thickness portions will increase gradually with the adding amount of the alloying Ni; but the effect is not marked. On the other hand, adding alloying Ni significantly improves the uniformity of surface and center cross section hardness for casting with different thickness portions. For example, the standard deviation of the average center cross section hardness for the casting with different thickness (10, 20, 40, 80mm) drops 0.039, 0.032, 0.030, 0.018, respectively, with adding 0 wt.% to 3.0 wt.% Ni. Adding alloy Ni will have better result on reducing the standard deviation of the average hardness and on hardness uniformity for thinner casting elements. |
本系統中英文摘要資訊取自各篇刊載內容。