Performance of CBN and PCBN Tools on the Machining of Hard AISI 440C Martensitic Stainless Steel

Abstract

the cutting forces and also causes the heat generated at tool tip and work surface interface. High cutting forces are identified and this may be due to heat and flank wear combinations. Flank and crater wear on the rake face and hard metal deposition due to diffusion of metals on the cuttiug tool surface are the damages occurred during process. mRODUCTIONHard turning has been applied in Inany areas like production of bearings, gears, shafts, axles, and other mechanical components [l-21. ATSI 440 C martensitic stainless steel is pronounced as difticult to cut materials and t l~i s~a r d e n e d %~~r i k e~-d~s * R r m i~ of these types of materials require hard and tough cutting tools like CBN and PCBN tools. These types of cutting tools will reduce flank wear and withstand the heat generation. The generatlon of heat will produce low cutting forces due to thermal softening of the chips. It is known that 60 % of the heat generated by the turning is c a~i e d away by chips and the remaining is retained by work material and tool cutting edges. However, stainless steels are low thermal conductivity material and very small percentages of heat retained by the work material. Tool wears are complex phenon~enon.Tool wear is common in all the machining processes and depend very much on the hardness of the work materials, type of tool, rigidity of the machine, hardness of the work materials heat All rights reserved. No pan of contents or this paper may be reproduced or tnnsmined in any brm or by any means wimoufthe wrnten permissionof TTP.

Effects of Nb and C Addition on Corrosion Resistance of Metal-Injection-Molded 440C Stainless Steel

“…As a martensitic stainless steel, 440C stainless steel has high strength and hardness is widely used for transportation, machining, and in medical instruments [1][2][3]. However, stainless steel parts with small sizes and complex shapes are difficult to manufacture by traditional methods such as casting and machining.…”

Investigating the Impact of Physical Vapour Deposition (PVD)-Coated Cutting Tools on Stress Corrosion Cracking Susceptibility in Turning Super Duplex Stainless Steel

“…This is well illustrated by Chen's findings [23], which establish a correlation between ductility and surface finishing quality. Specifically, materials exhibiting higher ductility tend to exhibit comparatively inferior surface finishes when contrasted with harder, less ductile materials [21,34]. Intriguingly, Chen's work introduced the notion of an optimal level of flank wear, a concept that unexpectedly suggests that controlled wear may enhance surface finishing attributes.…”

Experimental Study on Laser Ablation Texture-Assisted Grinding of Tungsten Alloy

“…At present, tungsten alloy machining methods mainly include cutting [ 2 ], grinding and polishing [ 3 ]. In the traditional cutting process, due to the large differences between the characteristics of biphase materials in tungsten alloy, the workpiece appears with scaly spines and furrows, and a series of problems such as tool wear, poor machining integrity and chip adhesion occur, which makes it difficult to obtain the high surface quality of tungsten alloy, and limits the application of tungsten alloy [ 4 ]. In view of the above problems in machining, some scholars proposed ultrasonic elliptical vibration machining technology [ 5 ] and low-temperature cutting technology [ 6 ], but the improvement of tungsten alloy machining quality by these technologies is limited.…”