Total or partial copying, modification and translation is forbidden FC040K0068V1000UK FLAME HARDENING Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. -Nitriding is a lower distortion process than carburizing but it can be used for certain type of steel such as chromium-molybdenum alloy steel -Flame hardening is preferred for heavy cases or selective hardening of large machine components. One of the reasons is that induction hardening is easily incorporated into a manufacturing cell. Induction hardening. Optimizing process parameters such as heating cycles, frequencies and coil and quench design result in the best possible outcomes. You can change your ad preferences anytime. Both methods, case hardening and induction hardening, have advantages and downsides. This is a brief overview of Induction hardening I presented in early 2012. The analysis of an induction hardening process is a complex process because induction hardening is a combination of heat transfer, electromagnetic and metallurgical phenomenon. Induction heating is a non-contact heating process. Flame hardening can be done of any shape, like flat, circular, irregular shapes, etc. The converter emits an alternate current in the induction coil, where an electromagnetic field is generated. See our Privacy Policy and User Agreement for details. In many cases today (2013), virtual tests and eva-luations can be made more quickly and at a lower cost than physical ones (Ref 10–12). See our User Agreement and Privacy Policy. Now customize the name of a clipboard to store your clips. Parts don’t have to be taken out of the production flow and sent to a separate heat treating department. Case hardening process used to increase wear resistance, surface hardness and fatigue life through creation of a hardened surface layer while maintaining an unaffected core microstructure. INDUCTION HARDENING Induction hardening is commonly used to heat treat gears as it is a quick process that takes very little time. Induction coil designs and process recipes are “virtually” tested to determine resulting heat patterns. process method used to handle and transport the hardening elements to the surface of the part. -Induction hardening works best on parts small enough and SHIVAM SONI ( GME/SL/14/4621 ) The quenched metal undergoes a martensitic transformation, increasing the hardness and brittleness of the part. Heat is applied to the part being hardened, using an oxy- acetylene (or similar gas) flame on the surface of the steel being hardened and heating the surface above the upper critical temperature before quenching the steel in a spray of water. Precipitation disperses hard particles throughout the existing more ductile material. These particles disrupt long dislocation planes physicsinv-140316012232-phpapp02. UltraGlow® Induction Hardening is a form of heat treatment in which a steel or cast iron part is heated by electromagnetic induction, immediately followed by rapid cooling (quenching). The method of hardening is called precipitation hardening and age hardening. 11. Review of Surface Hardening * Induction hardening (~67 HRC) (a) (b) Can be used on any type of steel Utilizes localized heating Has clean transition pattern Process takes less than 1 minute Nitriding (~69 HRC) (c) Uses ammonia or cyanide salt baths Depth of 1 mm Roughly 4 hours per work piece Carburizing (~50 HRC) Images of gear teeth hardened by (a) Used on low carbon content steel … Induction hardening boosts throughput. It is a common process applied to bearing races, pinion shafts, gears, crane wheels and treads, threaded pipe and other parts common to heavy machinery. For the mass production of components in medium or large quantities however, induction hardening offers a range of benefits: Induction hardening is used to selectively harden areas of a part or assembly without affecting the properties of the part as a whole. Main Applications of Induction Heating ¾Hard (Silver) Brazing ¾Tin Soldering ¾Heat Treatment (Hardening, Annealing, Tempering, …) ¾Melting Applications (ferrous and non ferrous metal) ¾Forging This document is property of CEIA which reserves all rights. Ashley Lane MSE 440 January 24, 2012Image taken from http://www.contourhardening.com/images/753_GearGlowing.jpg. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Parts don’t have to be taken out of the production flow and sent to a separate heat treating department. 4. the induction hardening process and to obtain ideal values of hardness and case depth. Induction hardening. 2. Another rea-son is that induction hardening is often considered a “green” alternative. One of the reasons is that induction hardening is easily incorporated into a manufacturing cell. BY:- Clipping is a handy way to collect important slides you want to go back to later. 3. These coils create a magnetic field around the coils, inducing an electric current to go through it. Introduction What is Induction Heating? Heat treating is a group of industrial and metalworking processes used to alter the physical, and sometimes chemical, properties of a material. Flame Hardening: Flame hardening is the process of selective hardening … Another rea-son is that induction hardening is often considered a “green” alternative. These process variations naturally produce differences … The cyaniding process is the fast and most efficient surface hardening process. Flame hardening is similar to induction hardening, in that it is a surface hardening process. Induction hardening involves the surface hardening of steel and other alloy parts. The major disadvantage is the cost. & Induction hardening is a process used for the surface hardening of steel and other alloy components. Induction hardening is a type of surface hardening in which a metal part is induction-heated and then quenched. Induction Gear Hardening: Part 1 The practice and science of modern induction heat-treating has advanced in many areas over the last decade, including computer modeling, power supplies, failure analysis, quality assurance, and more. Limitations of Induction Hardening Requires an Induction Coil and Tooling which relates to the Part’s Geometry Based on the process variables and their levels, an orthogonal array of L27 (33) was found to be appropriate for the experimental layout which requires 27 trials. The heating temperature for nitriding Ranges from 480 degree Celsius to 550 degree Celsius. Induction hardening is used to increase the mechanical properties of ferrous components in a specific area. The alternating current in the coil induces an alternating magnetic field within the work piece which causes the outer surface of the part to heat to a temperature above the transformation range. The proposed method discussed in this presentation is known as Dual Pulse Induction Hardening (DPIH). The Induction Hardening Process. Figure 7. Automatic handling of components and fixtures holding parts for heating and quenching provide for high output operation and help produce uniform results, part after part. 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