(1.東北大學(xué)冶金系，沈陽110006；
2.鞍山鋼鐵公司煉鐵廠，鞍山114021)
摘 要: 采用精密垂直拉桿膨脹儀在14~1000℃范圍內(nèi)測量了具有不同石墨化率的自焙炭塊的相對熱伸長量，并由此獲得了熱線膨脹系數(shù)α。結(jié)果表明:石墨化率一定時，α值在較低溫度下隨溫度升高而增加，在較高溫度下，α值隨溫度變化不明顯；恒溫時，石墨化率越高，α值越低。討論了單位熱應(yīng)力下的彈性模量概念。
關(guān)鍵字: 自焙炭塊 石墨化率 熱膨脹系數(shù) 拉桿式膨脹儀 彈性模量
（1.Department of Metallurgy, Northeastern University, Shenyang110006
2． Ironmaking Works, Anshan Iron and Steel Complex, Anshan 114021）
Abstract:Relative thermal expansions,ΔL/L0,of self-baking carbon blocks with different graphitization degree were measured by using a precise vertical pull-rod dilatometer within temperature range of 14~1000℃, based on which the linear thermal expansion coefficients,α,of the carbon blocks were obtained. Results showed that the value ofαincreased with increasing temperature at a given graphitization degree; the higher the graphitization degree, the lower the value ofαat a given temperature. Thermal elastic moduli of the carbon blocks were discussed.
Key words: self-baking carbon block graphitization degree thermal expansion coefficient dilatometer modulus of elasticity
