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误码甲Formaster－Digital全自动相变仪测定了H13钢的退火用TTT图。利用物理化学相分析法，扫描电镜分析，X射线衍射分析，测定研究了H13钢不同退火工艺处理后钢的基体中合金元素含量，碳化物类型、尺寸，分布和相对数量。测显钢的退火硬度，分析了硬度与碳化物粒子大小、相刘数量、碳化物结构类型的依赖关系。
Error code A Formaster-Digital automatic phase change instrument measured H13 steel annealing TTT chart. The contents of alloying elements, carbide types, sizes, distributions and relative amounts in the matrix of steel after H13 steel were treated by different annealing processes were determined by means of physical and chemical analysis, scanning electron microscopy and X-ray diffraction analysis. The hardness of the steel was measured and the dependence of the hardness on the size of the carbide particles, the number of phases and the type of carbide structure was analyzed.