Recent developments in turning hardened steels _ A review

Frontiers in Automobile and Mechanical Engineering

Sivaraman, V.^1 ; Prakash, S.^2

Sathyabama University, Jeppiar Nagar, Chennai, India^1

Faculty of Mechanical Engineering, Sathyabama University, Jeppiar Nagar, Chennai, India^2

关键词: Coated carbide insert;    Cooling requirements;    Cutting temperature;    Difficult to machine materials;    Literature reviews;    Polycrystalline cubic boron nitride;    Process parameters;    Turning of hardened steel;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/197/1/012009/pdf
DOI  :  10.1088/1757-899X/197/1/012009

来源: IOP

【 摘 要 】

Hard materials ranging from HRC 45 - 68 such as hardened AISI H13, AISI 4340, AISI 52100, D2 STL, D3 STEEL Steel etc., need super hard tool materials to machine. Turning of these hard materials is termed as hard turning. Hard turning makes possible direct machining of the hard materials and also eliminates the lubricant requirement and thus favoring dry machining. Hard turning is a finish turning process and hence conventional grinding is not required. Development of the new advanced super hard tool materials such as ceramic inserts, Cubic Boron Nitride, Polycrystalline Cubic Boron Nitride etc. enabled the turning of these materials. PVD and CVD methods of coating have made easier the production of single and multi layered coated tool inserts. Coatings of TiN, TiAlN, TiC, Al2O3, AlCrN over cemented carbide inserts has lead to the machining of difficult to machine materials. Advancement in the process of hard machining paved way for better surface finish, long tool life, reduced tool wear, cutting force and cutting temperatures. Micro and Nano coated carbide inserts, nanocomposite coated PCBN inserts, micro and nano CBN coated carbide inserts and similar developments have made machining of hardened steels much easier and economical. In this paper, broad literature review on turning of hardened steels including optimizing process parameters, cooling requirements, different tool materials etc., are done.