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首页> 外文期刊>International Journal of Refractory Metals & Hard Materials >Experimental investigation on hard milling of high strength steel using PVD-AlTiN coated cemented carbide tool
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Experimental investigation on hard milling of high strength steel using PVD-AlTiN coated cemented carbide tool

机译：PVD-AlTiN涂层硬质合金刀具对高强度钢进行硬铣削的实验研究

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摘要

High strength steel 30Cr3SiNiMoVA (30Cr3) is usually used to manufacture the key parts in aviation industry owing to its outstanding mechanical properties. However, 30Cr3 has poor machinability due to its high strength and high hardness. Hard milling is an efficient way in machining high strength steels. This paper investigated hard milling of 30Cr3 using a PVD-AlTiN coated cemented carbide tool with regard to cutting forces, surface roughness, chip formation and tool wear, respectively. The experimental results indicated that the increase of cutting speed from 70 to 110 m/min leads to direct reduction of cutting forces and improvement of surface finish, while both feed rate and depth of cut have negative effect on surface finish. The occurrence of oxidation on chip surfaces under high cutting temperature makes the chips show different colors which are strongly influenced by cutting speed. Saw-toothed chips were observed with the occurrence of the thermo-plastic instability within the primary shear zone. Micro-chipping and coating peeling were confirmed to be the primary tool failure modes. Serious abrasion wear and adhesive wear with some oxidative wear were confimed to be the main wear mode in hard milling of 30Cr3.
机译：高强度钢30Cr3SiNiMoVA（30Cr3）由于其出色的机械性能而通常用于制造航空工业的关键零件。然而，由于30Cr3的高强度和高硬度，其可加工性差。硬铣削是加工高强度钢的有效方法。本文研究了使用PVD-AlTiN涂层硬质合金刀具对30Cr3进行硬铣削的方法，分别涉及切削力，表面粗糙度，切屑形成和刀具磨损。实验结果表明，切削速度从70 m / min增加到110 m / min导致切削力的直接降低和表面光洁度的提高，而进给速度和切削深度对表面光洁度均具有负面影响。在高切削温度下在切屑表面上发生氧化，使切屑显示出不同的颜色，这些颜色受切削速度的影响很大。观察到锯齿状切屑，并在主要剪切区内发生了热塑性不稳定性。确认微碎屑和涂层剥落是主要的工具失效模式。 30Cr3硬铣削的主要磨损方式被认为是严重的磨损和胶粘剂磨损以及一些氧化磨损。

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