镁及其合金导热研究进展

曾小勤, 王杰, 应韬, 丁文江

Recent Progress on Thermal Conductivity of Magnesium and Its Alloys

ZENG Xiaoqin, WANG Jie, YING Tao, DING Wenjiang

表1 常见镁合金的热导率和力学性能[1,18,30,52~57]

Table 1 Thermal conductivity and mechanical properties of conventional alloys[1,18,30,52-57]

Alloy Processing condition Thermal Mechanical property (mass fraction / %) conductivity YS UTS El W·m-1·K-1 MPa MPa % Pure Mg[1] 157.3 Mg-4Zn-1Mn[30] As-cast 118.1 - - - T4 (643 K, 12 h) 127.6 - - - T6 (643 K, 12 h + 423 K, 10 h) 130.4 - - - Mg-6Zn[18] As-cast 114.3 - - - T4 (633 K, 48 h) 108.7 - - - T6 (633 K, 48 h + 433 K, 60 h) 115.9 72 - - Mg-6Zn-1Cu[18] As-cast 121.3 T6 (703 K, 48 h + 433 K, 60 h) 128.9 94 - - Mg-5Zn-1Mn[52] As-cast 98.3 T4 (643 K, 12 h) + extruded at 623 K (16 ∶ 1) 106.0 177 291 19.3 T4 (643 K, 12 h) + extruded at 623 K (16 ∶ 1) + 268 321 14.8 T6 (448 K, 36 h) T4 (643 K, 12 h) + extruded at 623 K (16 ∶ 1 ) + 310 347 12.5 T6 (673 K, 1.5 h + 448 K, 20 h) Mg-3Al-1Zn[53] As-extruded 96.4 - - - Mg-9Al-1Zn[54] As-cast 51.2 - - - Extruded + T4 (688 K, 5 h) 47.3 - - - As-extruded 46.9 - - - Extruded + T6 (688 K, 5 h + 473 K, 8 h) 47.9 - - - Mg-0.1Mn[55] T4 (773 K, 24 h) + extruded at 623 K 142.1 - - - Mg-0.5Mn[55] T4 (773 K, 24 h) + extruded at 623 K 132.2 - - - Mg-1.5Mn[55] T4 (773 K, 24 h) + extruded at 623 K 124.7 - - - Mg-4Y-2Zn[56] As-cast 82.8 - - - Mg-12Gd[55] T6 (798 K, 24 h + 498 K, 24 h) 56.9 98.5 - - Mg-2Gd-2Nd-2Y- As-cast 55.0 111 183 8.1 1Ho-1Er-0.5Zn-0.4Zr[57] T4 (793 K, l6 h) 44.1 132 208 10.3 T6 (793 K, 16 h + 473 K, 82 h) 52.5 215 306 5.7