Temperature-dependent specific heat capacity for dry and wet vitrified-bond grinding wheels: Models of experiment and prediction
DOI:
https://doi.org/10.65419/albahit.v5i1.131Keywords:
Specific heat capacity, thermophysical properties, vitrified abrasives, temperature dependence, additive prediction model, DSC measurement, grinding wheel dryingAbstract
The vitrified-bond grinding wheels are widely used in precision grinding because of their versatility and high performance. These wheels are manufactured from abrasive grains such as aluminum oxide and carbide combined with bonding materials like ceramic or glass, which provide strength and stability. They are commonly applied in industries including metalworking, aerospace, automotive, and tool manufacturing, where they ensure efficient material removal and high-quality surface finishing. Their durability and thermal stability contribute significantly to consistent grinding performance.
The specific heat capacity of vitrified-bond grinding wheels is an important property because it determines the wheel’s ability to absorb and store the heat generated during grinding without overheating. A higher heat capacity helps reduce thermal shock, prevents thermal damage to the workpiece, and improves wheel efficiency and lifespan through better heat distribution and temperature control. This characteristic is especially important in precision grinding operations and applications involving high material removal rates.
This paper aims to determine the specific heat capacity of vitrified-bond grinding wheels containing agglomerated aluminum oxide abrasive grains within a temperature range of 10–80 °C. Experiments were conducted on samples 38A120LVS and 38A60LVB5 using a modified differential calorimeter (MDSC 2920), which enabled the measurement of temperature-dependent heat capacity. The results showed that the specific heat capacity increased with temperature. A predictive model based on mass ratios was also developed and demonstrated strong agreement with the experimental results, with an average deviation of about 5%. The study considered both dry and low-moisture conditions. The obtained data were applied to improve the modeling of drying processes and to reduce crack defects in vitrified grinding wheels caused by thermal stresses.
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