研究结果表明，淬火钢的合金元素含量和硬度对刀具的耐用度均有明显的影响，淬火碳钢的可加工性最好；
The experimental results show that the alloying element content of a hardened steel and its hardness have a remarkable influence on the tool life. The hardened carbon steel has the best machinability.
以这两种刀片在不同切削用量条件下的耐用度、加工表面粗糙度和主切削力作为刀具加工性能的评价依据，同时研究了刀片的磨、破损机理和卷、排屑稳定性。
The tool lifespan, surface roughness and main cutting force of the two kinds of tools with different machining parameters are used as the evaluation criterion of machining ability.
切削温度不仅直接影响刀具的磨损和耐用度，而且也影响工件的加工精度和已加工表面质量。
Cutting temperature has direct effects on not only tool wear and tool life but also machining accuracy and quality of machined surfaces.
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