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本文应用扫描电子显微镜、电子探针显微分析仪等对不锈钢拉削鳞刺进行了探讨。测定了鳞刺成分及应力状态,分析了影响鳞刺形成的主要因素和鳞刺与冷作硬化层的关系,发现了鳞刺根部伸向基体的微细裂纹,论证了导致应力腐蚀和疲劳断裂的主要原因。并在此基础上,设计制造了可消除鳞刺的新型拉刀,使拉削光洁度提高2～3级,拉刀耐用度提高三倍。为整个拉刀系列的设计提供了新的经验和根据。
In this paper, the use of scanning electron microscopy, electron probe microanalysis Stainless steel barbed scales were discussed. The composition and stress state of the spines were determined. The main factors influencing the formation of spines and the relationship between the scales and the cold-hardening layer were analyzed. The microscopic cracks extending to the basal part of the spines were found. The results of stress corrosion and fatigue fracture main reason. And on this basis, the design and manufacture of a new type of broach can eliminate the spikes, so that improved finish 2 to 3, broach durability increased by three times. For the entire broach series design provides a new experience and basis.