中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 13 Special 1 May 2003 |
its influence factors
HU Lian-xi(胡連喜)1, YU Yang（于 洋）1, CHEN She-wei(陳社偉)1
（1. School of Materials Science and Engineering,
Harbin Institute of Technology, Harbin 150001, China;
2. Institute of Composite Materials, Harbin Institute of Technology,
Harbin 150001, China）
Abstract:The microstructure and mechanical properties of 95W-5(Ni/Fe/Co) alloys were studied, as well as the relationships between hot hydrostatic extrusion(HHE) technics factors and precipitation, the relationship between mechanical properties and deformation temperature was obtained, and the influence of extrusion speed and extrusion ratio on mechanical properties was analyzed. After analyzing the fractures by SEM and precipitation by TEM, the micro-characters of the plasticity change with deformation temperature was exposed. The results show that the fracture strength almost keeps constant at 400-600℃, but reduces sharply at other temperatures; the abnormity of plasticity changing has close connection with temperature, extrusion technics and precipitation.
Key words: 95W-5(Ni/Fe/Co) alloys; microstructure; mechanical properties; hot hydrostatic extrusion; precipitation
