(1.东北大学冶金系,沈阳110006;
2.鞍山钢铁公司炼铁厂,鞍山114021)
摘 要: 采用精密垂直拉杆膨胀仪在14~1000℃范围内测量了具有不同石墨化率的自焙炭块的相对热伸长量,并由此获得了热线膨胀系数α。结果表明:石墨化率一定时,α值在较低温度下随温度升高而增加,在较高温度下,α值随温度变化不明显;恒温时,石墨化率越高,α值越低。讨论了单位热应力下的弹性模量概念。
关键字: 自焙炭块 石墨化率 热膨胀系数 拉杆式膨胀仪 弹性模量
(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