TC21合金是一种高强度钛合金,因其优异的强度组合而受到各行业的关注,韧性,和耐腐蚀性。鉴于这种合金是难以切割的材料,因此,本研究旨在优化不同条件下Turing这种合金的工艺参数(即收到的合金,和热处理合金)。L9Taguchi基于方法的正交阵列用于确定最佳切割参数和所需的最少实验试验次数。实现这一目标,在实验工作中使用了三个不同的切削参数;每个切削参数有三个级别。切削速度选择为120、100和80m/min。进给速率值分别为0.15、0.1和0.05mm/rev,切削深度值为0.6、0.4和0.2mm。在进行三个步骤的热处理之后(第一步:将样品加热至920°C持续1小时,然后降至820°C也持续1小时,第二步:通过水淬火(WQ)将样品冷却至室温,第三步:将样品在600°C下保持4小时(老化过程))。结果表明,三重热处理导致微观结构从(αβ)到(αβ)的变化,在残留的β基体中形成次级α血小板(αs),导致表面粗糙度降低56.25%,工具磨损24.18%。影响刀具刀片磨损和表面粗糙度的两个最关键因素是切削死亡和切削速度,分别占总数的46.6%和46.7%,分别。进料速率,另一方面,最不重要的是,贡献分别为20.2%和31.9%。
TC21 alloy is a high-strength titanium alloy that has been gaining attention in various industries for its excellent combination of strength, toughness, and corrosion resistance. Given that this alloy is hard to cut material, therefore this study aims to optimize the process parameters of Turing this alloy under different conditions (i.e. as-received alloy, and heat-treated alloy). The L9 Taguchi approach-base orthogonal array is used to determine the optimum cutting parameters and the least number of experimental trials required. The achievement of this target, three different cutting parameters are used in the experimental work; each cutting parameter has three levels. The cutting speeds are chosen as 120, 100, and 80 m/min. The feed rates\' values are 0.15, 0.1, and 0.05, mm/rev, and the depth of cut values are 0.6, 0.4, and 0.2 mm. After applying three steps of heat treatment (First step: is heating the sample to 920 °C for 1 h then decreasing to 820 °C also for 1 h, second step: cooling the sample to room temperature by water quenching (WQ), the third step: holding the sample at 600 °C for 4 h (Aging process)). The results revealed that the triple heat treatment led to the change in the microstructure from (α + β) to (α + β) with secondary α platelets (αs) formed in residual β matrix leading to a decreased surface roughness by 56.25% and tool wear by 24.18%. The two most critical factors that affect the tool insert wear and surface roughness are the death of cut and cutting speed, which contribute 46.6% and 46.7% of the total, respectively. Feed rate, on the other hand, has the least importance, contributing 20.2% and 31.9% respectively.