High temperature bending strength and high temperature creep

High temperature bending strength refers to the material at high temperature unit cross section can withstand the ultimate bending stress. Which characterizes the ability of a material to resist bending at high temperatures. That is, the columnar solid is subjected to external bending deformation, the convex surface is stretched, the concave surface is compressed, and when the sum of the applied external force exceeds a certain limit, it is broken in the curved vertical section, and the strength at this time is called the bending strength of the material. High temperature bending strength of the material will increase its impact on the material and wear, enhance slag resistance.
High temperature resistance of the material is a very important performance indicators, and the actual use are closely related. It depends on the chemical composition of the material, the organizational structure and the production process. The flux effect in the material has a significant effect on the high temperature flexural strength of the material.

When the refractory material at a high temperature to withstand less than its ultimate strength of a constant load, resulting in plastic deformation, deformation will increase over time, and even make the refractory material damage, this phenomenon is called creep. In the design of high-temperature furnace, according to the softening test of the refractory material and residual shrinkage, to a certain extent, can predict the high temperature volumetric stability of refractory materials, but the knowledge of materials in the long-term high temperature load conditions, the stability of the volume or not It is necessary to test its high temperature creep and understand its deformation characteristics under high temperature load for a long time.
High temperature creep of refractory material refers to the constant temperature deformation of the material at constant high temperature due to stress changes over time. According to the way of applying external force, high temperature creep can be divided into high temperature compression creep, high temperature tensile creep, high temperature bending creep and high temperature torsional creep, the most commonly used is high temperature compression creep.