The study of the properties of the Fe-8.5Al-28Mn-1.0Si-5.0Cr alloy

• Main Author: 吳蜀鴻
• Other Authors: 趙志燁
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/04651941721437978922

碩士 === 國立屏東科技大學 === 機械工程系 === 92 === Abstract The purposes of the present studies are to investigate the mechanical properties, phase transformation, and industrialization of the Fe-8.5Al-28Mn- 1.0C-1.0Si-5.0Cr alloy. In addition, the properties of the golf head made by this alloy were also performed. Based on the present study, some main results are described as followings: 1. After being solution heat treatment (SHT), the ultimate strength (UTS), yield strength (YS), and elongation (EL) of the alloy are in the range of 813~1265MPa, 715~993 MPa, 89.3~35.6%, respectively. During suitable hot-forged, hot-rolled, cold-rolled, and/or aged processes, the UTS, YS, and EL of the alloy can be in the range of 1085~1956 MPa, 996~1909 MPa, 57~3%, respectively. 2. The microstructure of the alloy been SHT at temperature above 1020 ℃ is single γ phase, and being a (DO3+γ) duplex phase when the SHT temperature below 1020 ℃. After being aged at temperature in the range of 550~650℃ for 1~8 hours, some fine (Fe,Mn)3AlCx carbides precipitated along <100> direction are observed within the γ matrix. In addition, some coarse (Fe,Cr)7C3 are observed within the DO3 matrix, and the (1100) plane of the (Fe,Cr)7C3 will be parallel to the (111) plane of the D03 matrix. Moreover, a γ→DO3+κ+(Fe,Cr)7C3 phase transition can be found on γ/γ grain boundaries. 3. Compared to commercial stainless steel, the golf head made by this alloy will possess some superior properties, including the higher spin, longer trajectory distance and larger trajectory angle. The COR of the golf head is in the range of 0.771~0.843.