Abstract In this paper, the wear and cutting performance of uncoated cemented tungsten carbide (WC) inserts textured by shot peening (SP) and electrical discharge machining (EDM) was compared to examine the hypothesis that texturing processes involving surface re-melting are inferior to processes based on surface plastic deformation. Lubricated orthogonal tube turning experiments demonstrated that the WC inserts with irregular rake face surface texture exhibit either longer or shorter tool lives than untreated inserts depending on the combination of surface roughness and residual stress. Higher roughness and compressive residual stress produced by SP led to increase in wear resistance and tool life by about 30% through reduction of the tool-chip contact area and the apparent tool-chip friction. Tensile surface residual stresses generated by EDM resulted in chipping of the tool and, hence, shorter tool life by more than 80% even when cutting forces were lowered. Moving the treated area away from the cutting edge neutralized the effect of texture on tool life. Based on the test results, surface modification of WC inserts through SP yielded better tool life performance than surface modification through EDM.

中文翻译：

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通过喷丸和电火花加工织构的 WC 刀片的磨损

摘要 本文比较了通过喷丸 (SP) 和电火花加工 (EDM) 织构的无涂层硬质合金 (WC) 刀片的磨损和切削性能，以检验涉及表面再熔化的织构工艺不如基于表面塑性变形的过程。润滑正交管车削实验表明，根据表面粗糙度和残余应力的组合，具有不规则前刀面表面纹理的 WC 刀片比未经处理的刀片具有更长或更短的刀具寿命。SP 产生的更高粗糙度和压缩残余应力通过减少刀具 - 切屑接触面积和表观刀具 - 切屑摩擦导致耐磨性和刀具寿命增加约 30%。由 EDM 产生的拉伸表面残余应力会导致刀具崩刃，因此即使在降低切削力的情况下，刀具寿命也会缩短 80% 以上。将处理过的区域从切削刃移开抵消了纹理对刀具寿命的影响。根据测试结果，通过 SP 对 WC 刀片进行表面改性比通过 EDM 进行表面改性产生了更好的刀具寿命性能。