Metal heat treatment is an important technological means to improve the properties of metal materials, and temperature is the core control factor in the heat treatment process. Dry-block calibrators have an indispensable position in temperature calibration of metal heat treatment process. In heat treatment processes such as annealing, quenching and tempering of metals, it is necessary to accurately control the temperature and time in different stages. Dry-block calibrators can be used to calibrate temperature sensors in heat treatment furnaces to ensure that during annealing, the metal can be slowly cooled in a suitable temperature range, eliminating internal stress and improving the toughness and plasticity of the metal; during quenching, it can ensure that the metal is rapidly cooled to a predetermined low temperature to obtain the required hardness and strength; during tempering, the calibrated temperature sensors enable the metal to be heat-treated at a specific temperature, adjust its internal microstructure and further optimize the comprehensive properties of the metal. Through the accurate calibration of temperature by dry-block calibrators, the stability and reliability of the metal heat treatment process are ensured, the quality and performance of metal products are improved, and the diverse performance requirements of metal materials in different industrial fields are met.