| Title |
The Effects of Cold Working and Ageing Treatment on the Mechanical properties of W Heavy Alloy |
| Authors |
송흥섭(H . S . Song); 김은표(E . P . Kim); 이성(S . Lee); 노준웅(J .W . Noh); 백운형(W . H . Baek); 천병선(B . S . Chun) |
| Abstract |
Tungsten heavy alloys are successful combinations of strong W grain and ductile Ni base matrix. Its high density and strength combined with excellent ductility are the principal advantages of these alloys. The purpose of this study was to understand the effects of cold working and post-ageing treatments on the mechanical properties using the classical approach of sintering compacts from a mixture of 93W-4. 9Ni-2.1Fe system. By using the ageing treatment, the strength and hardness were increased with ageing temperatures and showed maximum strength at 600℃ for the 15% cold worked specimens; whereas, ductility was minimum. Strengthening by the ageing treatment might be attributed to the very fine dispersed precipitates in W grains. |