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Surface Engineering and Processes
Published in Kenneth C. Ludema, Oyelayo O. Ajayi, Friction, Wear, Lubrication, 2018
Kenneth C. Ludema, Oyelayo O. Ajayi
2.Induction hardening is done by placing a metal into a loosely fitting coil, which is cooled by water and in which an alternating high current (from 60 Hz up to radio frequency, i.e., kHz) flows. The current in the coil induces a magnetic field in the metal, which because of magnetic reluctance causes heating in the metal, mostly in the surface at the higher frequencies. The coil current is shut off and cooling water is applied to the part at the appropriate time. This process is clean and readily automated, but it is restricted in its ability to heat specific regions on a surface.
Heat Treatments and Surface Hardening of Small Weapon Components
Published in Jose Martin Herrera Ramirez, Luis Adrian Zuñiga Aviles, Designing Small Weapons, 2022
Jose Martin Herrera Ramirez, Luis Adrian Zuñiga Aviles
Induction hardening is a selective hardening process in which a localized surface of a steel workpiece is heated by induction and then quenched. Only such a surface undergoes a martensitic transformation and is selectively hardened, while the rest of the workpiece is not affected. Carbon steels and alloy steels with a carbon content of 0.40–0.45 wt% are most suitable for this process [22].
Surface Engineering of Metals
Published in Zainul Huda, Metallurgy for Physicists and Engineers, 2020
Induction Hardening. Induction hardening involves the use of electric inductor coils to locally heat the steel component followed by fast cooling (quenching). The high frequency electric fields rapidly heat the surface of the component; which is then quenched using water. This surface treatment results in a localized hardened layer at the surface.
Impact of induction hardened workpiece hardness on EDM performance
Published in Materials and Manufacturing Processes, 2018
Induction hardening or short cycle austenization is a versatile thermo-electric heating process widely used for uniform surface hardening, localized surface hardening, through hardening, and tempering of hardened parts for a wide range of whole or selective parts such as machine tools, hand tools, crankshafts, camshafts, axle shafts, transmission shafts, universal joints, gears, and many other parts of the automotive system and established itself as a part and parcel of the automated manufacturing environment.[1] This process fits itself well to both the inline manufacturing and dedicated stand-alone cell. It increases wear life, contact strength and/or contact fatigue life, fatigue resistance, and in-service life of components.[2]
Effect of Spot Continual Induction Hardening on the Tribological Performance of Grey Cast Iron with Curved Surface
Published in Tribology Transactions, 2018
Xunpeng Qin, Kai Gao, Zhou Wang, Xuliang Chen
There are many surface strengthening methods that can improve wear resistance, such as flame, laser, and induction strengthening (Lee, et al. (2); Wang, et al. (3); Totik, et al. (4). Some researchers have considered the effect of laser and induction strengthening processes on the tribological performance of cast iron. Pang, et al. (5) manufactured samples with microhardness differencees between bionic coupling units and the base metal by laser surface remelting in order to improve the wear resistance of gray cast iron guide rails. The results indicated that when the microhardness difference was 561 HV0.2, the wear resistance was the best. Chen, et al. (6) improved grey cast iron fatigue wear resistance through laser cladding carbon, a proposed process referred as laser carburizing. Optimization of laser carburizing processing conditions was achieved by studying the effects of input energy density on sample fatigue wear resistance. Results demonstrated that laser carburizing was a more effective means of improving fatigue wear resistance than laser remelting and that the improvement was significantly affected by an increase in energy density during treatment. Slatter, et al. (7) studied the impact wear resistance of untreated and induction = hardened compacted graphite iron. The induction hardening improved the impact wear resistance of the compacted graphite iron and it performed much better compared to the laser-hardened cast iron. Compared to other surface strengthening methods, induction hardening shows favorable features of controlled heating depth, energy savings, and low cost (Leatherman and Stutz (8).
On the residual life assessment of high-speed railway axles due to induction hardening
Published in International Journal of Rail Transportation, 2018
S. C. Wu, Z. W. Xu, Y. X. Liu, G. Z. Kang, Z. X. Zhang
The heat-induced induction hardening can produce a larger hardened layer (about 5 mm) as compared to the deep rolling process (about 2 ~ 3 mm hardened layer) [14,17]. In addition, the induction hardening can achieve a relatively small stress gradient and uniform hardness distribution, which can effectively prevent the near-surface material from debonding. Such technological advantage throw more prospective action against fatigue crack initiation and casual propagation of full-scale axles [14,15,22].