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本文应用(日)HHS—2X扫描电子显微镜和电子探针显微分析仪对拉削奥氏体不锈钢、镍基高温合金等难加工材料的鳞刺现象进行了研究。提出拉削中的鳞刺与金属晶界滑移、晶格畸变所形成的冷作硬化层之间的关系;如何消除拉削鳞刺对提高刀具耐用度、拉削表面质量及工件的抗疲劳强度、抗腐蚀能力有着重要的影响。在此基础上,设计制造了拉削不锈钢、高温合金的新型拉刀。拉削光洁度提高两级到三级,劳动生产率和刀具耐用度提高三倍以上,拉刀长度缩短1/3～1/5。为其它形式的拉刀设计,提供了有益的借鉴。
In this paper, HHS-2X scanning electron microscopy and electron probe microanalyzer were used to study the scaly phenomenon of difficult-to-machine materials such as broached austenitic stainless steel and nickel-based superalloy. Proposed broaching in the scale of thorns and metal grain boundary sliding, lattice distortion formed by the cold hardening of the relationship between the layer; how to eliminate broaching scales to improve tool durability, broaching surface quality and fatigue resistance of the workpiece Strength, corrosion resistance has an important impact. On this basis, the design and manufacture of broaching stainless steel, high-temperature alloy of the new broach. Broaching smoothness improved two to three levels, labor productivity and tool durability increased more than three times, broach length shortened 1/3 to 1/5. For other forms of broach design, provides a useful reference.