(沈阳工业大学 材料科学与工程学院，沈阳 110023)
摘 要: 采用工业用原材料在铜模铸造条件下研究Fe48−xCr15Mo14C15B6Y2Mx(M为Ni和Nb；x=0，1，2，3)合金的非晶形成能力与力学性能。TEM和XRD分析表明：当M为Nb和x=2时，可获得直径为7 mm的块体非晶合金，而x=0合金形成非晶的直径小于5 mm。DSC分析表明：Fe48−xCr15Mo14C15B6Y2Nix(x=0，1，2，3)非晶合金过冷液相区的温度分别为38.1、43.7、46.0和35.8 ℃；而Fe48−xCr15Mo14C15B6Y2Nbx (x=1，2，3)非晶合金过冷液相区的温度分别为44.4、47.1和34.4 ℃，过冷液相区的大小与合金非晶形成能力具有良好的对应关系。压缩实验表明：Fe48−xCr15Mo14C15B6Y2Nix(x=1，2，3)和Fe48−xCr15Mo14C15B6Y2Nbx(x=1，2)合金的压缩断裂强度分别为2 997.9、2 881.9、2 850.7、3 645.7和3 018.9 MPa。而x=0合金的压缩断裂强度为2 518.5 MPa。
关键字: Fe基非晶合金；Ni；Nb；非晶形成能力；压缩断裂强度
（School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110023, China）
Abstract:The glass-forming abilities of Fe48−xCr15Mo14C15B6Y2Mx (M are Ni and Nb; x=0, 1, 2, 3) alloys prepared by copper mold casting and the raw industrial materials were investigated by XRD, TEM and DSC. The results show that the bulk metallic glass (BMG) with diameter of 7 mm is fabricated for Fe46Cr15Mo14C15B6Y2Nb2 alloy. The glass-forming ability is much improved comparing to the alloy with x=0. The temperatures of supercooled liquid regions of Fe48−xCr15Mo14C15B6Y2Nix (x=0, 1, 2, 3) amorphous alloys are 38.1, 43.7, 46.0 and 35.8 ℃ while the temperature of Fe48−xCr15Mo14C15B6Y2Nbx (x=1, 2, 3) amorphous alloys are 44.4, 47.1 and 34.4 ℃, respectively, which corresponds to the glass-forming ability of those alloys. The compressive strengths of Fe48−xCr15Mo14C15B6Y2Nix (x=1, 2, 3) and Fe48−xCr15Mo14C15B6Y2Nbx (x=1, 2) are 2 997.9, 2 881.9, 2 850.7, 3 645.7 and 3 018.9 MPa, respectively, the compressive strength of Fe48Cr15Mo14C15B6Y2 alloy is 2 518.5 MPa.
Key words: Fe base metallic glass alloy; Ni; Nb; glass forming ability; compressive strength
