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本文阐述了低淬钢小模数齿轮宏观淬硬层分布,易控制在“半轮廓分布”、“凸肚形分布”状态。齿顶淬硬层深度和齿沟淬硬层深度呈一定比值。通常,齿顶淬硬层深度≥齿沟淬硬层深度。论证并规定了低淬钢齿轮齿顶淬硬层深度≤5/6齿全高,齿沟淬硬层深度≥0.15M(M为模数)。生产中,调节和改变淬火介质浓度,是控制低淬钢小模数齿轮宏观淬硬层分布的主要因素和有效手段。中频4档加热工艺使齿顶、齿工作面、齿沟获得均匀的6级细马氏体。
This paper describes the macroscopically hard layer distribution of low modulus steel gear, which is easy to control in “semi-profile distribution” and “convex belly distribution”. Teeth hardened layer depth and tooth groove hardened layer depth was a certain ratio. In general, the depth of the tooth tip hardened layer ≥ the depth of the tooth hardened layer. Demonstration and regulation of the low-quenched steel gear tip hardened layer depth ≤ 5/6 tooth full height, tooth groove hardened layer depth ≥ 0.15M (M is the modulus). In production, adjusting and changing the concentration of quenching medium is the main factor and effective means to control the distribution of macroscopic hardened layer of low modulus steel gear. The intermediate frequency 4-stage heating process makes the top of the tooth, the tooth face and the tooth groove obtain a uniform 6-grade fine martensite.