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高碳钢及许多高碳低合金钢的预先热处理采用球化退火,获得铁素体和球状渗碳体组织;最终热处理常用不完全淬火,获得马氏体、残留奥氏体和未溶渗碳体。退火态和淬火态的渗碳体(包括合金渗碳体)的尺寸、形状及均匀性(包括尺寸均匀性、形状均匀性及分布均匀性)对钢材的性能都具有显著影响。因此,准确地测定这些渗碳体的尺寸,对于确定热加工和热处理工艺,从而获得最佳的性能,是非常重要的。然而,在测试方法和指标上,往往存在相当大的误差。所测定的指标太少,不能很好地说明问
High-carbon steel and many high-carbon low-alloy steel pre-heat treatment using spheroidizing annealing to obtain ferrite and spherical cementite; final heat treatment commonly used incomplete quenching to obtain martensite, retained austenite and undissolved carburization body. The size, shape and uniformity (including size uniformity, shape uniformity and distribution uniformity) of annealed and quenched cementite, including alloying cementite, have a significant effect on the properties of the steel. Therefore, accurately measuring the size of these cementites is important for determining the hot working and heat treating processes for optimal performance. However, there is often considerable error in testing methods and metrics. Too few indicators of measurement, can not explain very well