When a material is subjected to a constant load is less than the ultimate strength at high temperature, plastic deformation, deformation will be gradually increased with the growth of time, even will cause material damage, this phenomenon is called creep. Therefore, in the high temperature material, cannot be isolated to consider its strength,and should take the factors of temperature and time and strength of consider. For example, the damage of hot blast stove checker brick work for a long time at high temperature, is because the brick body soften gradually produceplastic deformation, strength significantly decreased or even failure, the creep phenomenon known as the main cause of checker brick stove damage. In the design of high temperature furnace, according to the refractory materialsoftening test and residual shrinkage, volume stability of products is working in the complex condition of long-termhigh temperature was not full of people, so the high temperature creep, understand the deformation characteristics at high temperature and long time under load is very necessary.
High temperature creep refractories material at constant temperature and under loading, the relation between deformation and time. Due to the applied load is different, can be divided into the high temperature compression creep, creep, high temperature flexural creep and temperature torsional creep. The compression creep and thecreep card easy to measure, so it is widely applied in.
High temperature creep representation for deformation amount (%) and time (H) curve, usually called the creepcurve, one can also be expressed as the creep rate%/h, or said that in order to achieve the required a certainamount of deformation time.
