The refractories are subjected to the dual impacts of temperature and external forces during prolonged usage, and various stresses and changes will result as a result. The mechanical qualities of refractory materials refer to how well they operate under certain loads and strains. Normal temperature mechanical strength, high temperature mechanical strength, load softening temperature, high temperature creep, elastic modulus, and wear resistance are the key technical indicators used in engineering to assess the mechanical properties of refractories.
1、 Mechanical strength of refractories at room temperature
The critical stress of a refractory material that resists external force without damage at room temperature. It is usually expressed by three technical indicators: normal temperature compressive strength, normal temperature flexural strength and normal temperature shear strength.
2、Refractory materials' mechanical strength at high temperatures
a. High temperature compressive strength
b. High temperature flexural strength
c. high temperature shear strength.
3. The temperature at which refractory materials weaken under load
The chemical mineral composition and organizational structure, the quantity and interaction of crystal phases and liquid phases, the viscosity of the liquid phase, and macroscopic organizational structure, such as density and porosity, are the main factors influencing the load softening temperature of refractories. Generally speaking, the softening temperature under load is higher for refractories with crystal network structures and lower for refractories with island-like structures distributed in the liquid phase; the material has more liquid phase or liquid phase. The softening temperature under load is inversely correlated with viscosity: it decreases with decreasing porosity and increases with decreasing viscosity.
4、high temperature creep
When refractory materials are subjected to the constant force of their critical strength over an extended period of time at a high temperature, deformation occurs, and the degree of deformation rises with time. High temperature creep is the term for this phenomenon. Creep rupture is the term used to describe a material breakdown caused by creep. The high temperature creep property of a material is defined as the relationship between the amount of deformation and time of a refractory material under constant temperature and force for an extended period of time.
5、Elasticity modulus
Elastic modulus is often higher in refractory materials with higher compressive strength and flexural strength, and it is roughly inversely correlated with wear resistance. The acoustic frequency approach and the static load method are the two basic techniques for determining the elastic modulus of refractories.
6、Refractory materials' resilience to abrasion
The hardness of the particles, the strength of the bonding between the particles, the presence of vacancies, etc., all affect how resistant refractory materials are to wear. Refractories that have a uniformly dense structure, little porosity, high levels of hardness, and high levels of strength typically have good wear resistance.
