| Title |
Effects of the W addition on the Microstructure Evolution and Mechanical Properties of High Strength Si-Cr Spring Steels |
| Authors |
반덕영(Deok Young Ban) ; 남원종(Won Jong Nam) ; 이상래(Sang Lae Lee) |
| Abstract |
Effects of the W addition on the microstructure evolution and mechanical properties of high strength Si-Cr spring steels have been investigated. The W addition would reduce the coarsening rate of cementite due to the lower diffusion rate, resulting in a smaller size of cementite particles. The sag resistance depends on the distribution and the size of precipitates. Therefore, an abundance of precipitates at 350℃ tempering exhibits the maximum hysteresis loop area, i.e. the sag resistance. At the tempering temperature of 450℃-500℃, the W addition resulted in the improvement of the sag resistance through the suppression of the cementite coarsening. |