鐵-10鎳-5鉻-1鈷-1錳-1鉬-0.8鈦-0.8鈮-0.3鋁-0.1碳合金特性分析

The Characteristic Analysis of the Fe-10Ni-5Cr-1Co-1Mn-1Mo-0.8Ti-0.8Nb-0.3Al-0.1C Alloy

陳進富(Chin-Fu Chen)

指導教授 ： 趙志燁

國立屏東科技大學/工學院/機械工程系所/碩士(2007年)

https://doi.org/10.6346/NPUST.2007.00044

摘要

本文係利用光學顯微鏡(OM)、掃描式電子顯微鏡(SEM)、穿透式電子顯微鏡（TEM）、X光繞射分析儀、拉伸試驗機等分析技術，探討鐵-10鎳-5鉻-1鈷-1錳-1鉬-0.8鈦-0.8鈮-0.3鋁-0.1碳合金之顯微結構與熱機處理的機械性質。研究結果，如下所述：
合金經1100℃/1小時固溶處理，其顯微結構為板狀麻田散鐵組織，其結構屬於體心立方（B.C.C.）結構，晶格常數a=0.287 nm與（Nb.Ti）C的碳化物組織，其結構屬於面心立方（F.C.C.）結構，晶格常數a=0.439 nm。經時效處理之合金，於450℃時效其顯微結構為體心立方之α相，於550℃時效可以發現微顆粒狀之α′相和針狀之ω相於基地析出。於650℃時效處理可發現晶格常數a=0.360 nm之沃斯田鐵相形成。
合金在傳統熱處理與熱機處理及熱機處理後再施予時效處理的條件下，我們可發現在熱機處理後機械性質，其抗拉與降伏強度可提昇20~80 ksi。在熱機處理後再施予時效處理的情況下，其抗拉與降伏強度可提昇40~100 ksi左右。其最佳的處理條件為1100℃淬火至650℃鍛造後，施予450℃時效1小時，其抗拉、降伏強度與延伸率分別為218.9 ksi、210.7 ksi與8.5%。
關鍵字：晶格常數、麻田散鐵、顯微結構、熱機處理

關鍵字

晶格常數 ； 麻田散鐵 ； 顯微結構 ； 熱機處理

並列摘要

The purpose of the present study is investigated the microstructures and mechanical properties of TMT of the Fe-10Ni-5Cr-1Co-1Mn-1Mo-0.8Ti-0.8
Nb-0.3Al-0.1C alloy by using of OM, SEM, TEM, XRD, tensile testing machine. Based on the present studies, some results are describing as following:
Being solution heat treatments on 1100℃/1H, the microstructure of the present alloy are a fully plate-matensite phase belonging to the B.C.C. structure with the lattice parameter a=0.287 nm, and a carbide of （Nb,Ti）C belonging to the F.C.C. structure with the lattice parameter a=0.439. During the aging process in the 450℃, the microstructure of the present alloy is a α phase belonging to the B.C.C. structure. During the aging process in the 550℃, some α′-phase particles and acicular precipitations of ω phase were formed within the matrix. When aged at 650℃, some austenite phase region was found.
The alloy is under the circumstances of that traditional heat treatment and thermo-mechanical treatment (TMT) and being aging process after TMT, we can find circumstances of TMT can improve the tensile strength and yield strength about 20~80 ksi. And under the circumstances that being aging process after TMT, can improve the tensile strength and yield strength about 40~100 ksi. The optimum process is aging process in the 450℃/1H after forge for 1100 quenching to 650℃, the tensile strength, yield strength and elongation of these specimen, could reach to the 218.9 ksi, 210.7 ksi, 8.5%, respectively.

Keywords: lattice parameter, Matensite, Microstructure, TMT

並列關鍵字

lattice parameter ； Matensite ； Microstructure ； TMT

參考文獻

14. A. Bhattacharjee, P. Ghosal, A. K. Gogia, S. Bhargava, S. V. Kamat, 2007, “Room temperature plastic flow behaviour of Ti-6.8Mo-4.5Fe-1.5Al and Ti-10V-4.5Fe-1.5Al:Effect of grain size and strain rate,” Materials Science and Engineering A452-453, pp.221.

16. D. Bakavos, P. B. Prangnell, B. Bes, F. Eberl, 2008, “The effect of silver on microstructural evolution in two 2xxx series Al-alloys with a high Cu:Mg ratio during ageing to a T8 temper,” Materials Science and Engineering, A491, pp. 217-219.

17. Habibi Bajguirani H. R. 2002, “The effect of ageing upon the microstructure and mechanical properties of type 15-5 PH stainless steel ,” Mater. Sci. and Eng., Vol. A338, pp. 142-159.

18. Hsiao C. N., Chiou C. S., Yang J. R. 2002, “Aging reaction in a 17-4PH stainless steel,” Mater Chem Phys, Vol. 74, pp. 134-142.

21. Y. B. Wang, Y. F. Zheng, 2008, “The microstructure and shape memory effect of Ti-16at%Nb alloy,” Materials Letters, 62, pp.270.