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利用XRD对低合金高速钢及通用型高速钢M2各热处理状态下碳化物的数量及类型变化特点进行研究,同时对力学性能进行了测试。结果表明:由于采用较高的碳饱和度,低合金高速钢退火态的碳化物数量接近通用型高速钢M2,淬火过程中溶入基体及回火时析出的碳化物数量与M2钢相当,增加了固溶强化效果及二次硬化能力;使低合金高速钢经1170℃淬火+540℃×3 h三次回火后,其硬度和600℃红硬性可达M2钢的水平,获得了良好的综合性能。
XRD was used to study the variation of the quantity and type of carbides during the heat treatment of low-alloy high-speed steel and general-purpose high-speed steel M2. The mechanical properties were also tested. The results show that due to the higher carbon saturation, the amount of carbides annealed in the low-alloy high-speed steel is close to that of the common high-speed steel M2. The amount of carbides precipitated into the matrix and tempering during quenching is equivalent to that of the M2 steel, The solid solution strengthening effect and the secondary hardening ability; the low alloy high speed steel hardened by 1170 ℃ + 540 ℃ × 3 h after three times tempering, the hardness and red hardness of 600 ℃ up to the level of M2 steel obtained a good comprehensive performance.