Boronizing Process of 45 Carbon Steel Mold for Fabricating Sand-Lime Brick

摘要

With the orthogonal experiment approach, the boronizing process parameters such as the boronizing temperature, the amount of boron carbide, potassium fluoborate, silicon carbide and rare earth used were determined, and the thickness of the bonding layer is less than 0.25 mm. By co-permeation of boron, chromium, rare earth and carbon, the hardness of the transition layer is improved and the service life of the mold used for fabricating the sand-lime brick is achieved at 1.2 million times. Through testing with appropriate fast quenching oil, the hardness of the substrate after boronizing process is guaranteed to meet the technological requirements and its deformation is also ensured to meet the application requirements.