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钛合金TB6铣削加工硬化实验

, PP. 135-140

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Abstract:

研究了使用涂层硬质合金刀具对钛合金TB6进行端铣加工时,铣削参数以及刀具后刀面磨损量对加工硬化(表面硬化率、硬化层深度以及硬化层硬度分布)的影响,以弄清TB6铣削硬化现象及机理.结果表明,在实验参数范围内,刀具无磨损的情况下,硬化率基本保持在107%~112%范围内,硬化层深度范围为18~36μm;铣削速度增加时,加工硬化程度会有较为明显的降低现象,而进给量与切深对加工硬化的影响并不明显;刀具磨损对加工硬化的影响较为显著,后刀面磨损量低于0.2mm时,硬化层深度随着磨损增加从30μm增加至55μm,而后刀面磨损量为0.35mm时,硬化层深度达到了130μm.刀具磨损后在加工表面下较浅位置出现软化区域,而且随着磨损量的增加,软化越来越明显.

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