- 學位論文
鐵-16.5-鉻-X鎳合金特性分析
The Characteristic Analysis of the Fe-16.5Cr-xNi Alloys
摘要
本研究主要利用不同鎳含量，同時具有樹枝狀結構的鑄件鐵-16.5鉻-X鎳合金作為起始材料，再經由鍛造加工後，分析其組織及機械性質的特性。結果顯示，同時具有FCC與BCC樹枝狀結構的鑄件合金，經由X-Ray分析顯示，FCC結構的比例隨著鎳含量的增加而增加，而在機械性質分析顯示，其伸長率在4，6，7%鎳含量的合金當中，以7%鎳含量的合金具有27 %的伸長率為最高，拉伸強度則以6%鎳含量的合金具有1144 Mpa為最高；對於4，6，7%鎳含量的鑄造合金再經由鍛造加工後其伸長率則明顯的隨著鎳含量的增加而從7.6%增加到31.8%，而拉伸強度則隨著鎳含量的增加而明顯的從1157 Mpa降至626.9 Mpa。比較起始與變形後兩種材料，其機械性質分析結果顯示，變形後的材料除4%鎳含量較起始材料的伸長率略微下降外，其它相對鎳含量的材料皆明顯的增加，而在拉伸強度方面除6%鎳含量材料下降外，其它相對鎳含量的材料也明顯的增加。所有結果亦顯示鐵-16.5鉻-X鎳合金鑄造合金與再鍛造加工後的鐵-16.5鉻-X鎳合金在高爾夫球頭的應用皆符合機械性質的要求。
並列摘要
In present study, die casting Fe-16.5Cr-xNi alloys of various Ni content were used as received material, that has the dendrites crystal structures of FCC and BCC, and processed by forging proceed. The structure and mechanical properties were studied in present work. In X-ray diffraction analysis, the result exhibited the proportion of FCC crystal structure increased with increasing Ni content. In tensile tests, there were the highest elongation 27% and the best tensile stress 1144Mpa for 7%Ni and 6%Ni, respectively, among 4，6，7%Ni content in die casting Fe-16.5Cr-xNi alloys. In forged Fe-16.5Cr-xNi alloys, there were 4，6，7%Ni content, the results exhibited the elongation increased with increasing Ni from 7.6% to 31.8%, but the tensile stress decreased from 1157Mpa to 626.9Mpa. Compared die casting and forged Fe-16.5Cr-xNi alloys, and the results exhibited the elongation decreased a slightly for forged alloys of 4%Ni content than that. In tensile stress, it exhibited higher yield stress than die casting alloys except forged alloy of 6%Ni content.In conclusion, they were agreeable to required mechanical properties for both die casting and forged alloys were applied in golf.