It is a process by which the properties of steel are enhanced to meet machinability requirements
1. Full Annealing-The process involves heating the steel to 30 to 50 degrees Centigrade above the critical temperature of steel and maintaining the temperature for a specified period of time, then allowing the material to slowly cool down inside the furnace itself without any forced means of cooling. 5. Isothermal Annealing – This is a process where is steel is heated above the upper critical temperature. This causes the structure of the steel to be converted rapidly into austenite structure. Annealing, in metallurgy and materials science, is a heat treatment wherein a material is altered, causing changes in its properties such as strength and hardness. It is a process that produces conditions by heating to above the recrystallization temperature and maintaining a suitable temperature, and then cooling. 2. During annealing process, the temperature is slowly reduced so that the stress on the molecular level is removed the beads. 3. Annealing means the burning of metallic colors into glass, earthenware, etc. 4. To heat glass or metal and then cool slowly to prevent brittleness. Process annealing [edit]. Process annealing, also called intermediate annealing, subcritical annealing, or in-process annealing, is a heat treatment cycle that restores some of the ductility to a product during the process of cold working, so it can be worked further without breaking further heat treatment cycles. Annealing occurs by the diffusion of atoms within a solid material, so that the material progresses towards its equilibrium state. Heat increases the rate of diffusion by providing the energy needed to break bonds. PDF FILE-CLICK HERE FOR PRINTABLE WORKSHEET. Annealing is a heat process whereby a metal is heated to a specific temperature /colour and then allowed to cool slowly. This softens the metal which means it can be cut and shaped more easily. Mild steel, is heated to a red heat and allowed to cool slowly.  Annealing is a heating process that can apply to all types of material, metal, or semiconductor or insulator alike. It is commonly used in semiconductor industry. Its purposes can be to activate impurities in the substrate or repair crystal damage. BTW, this is NOT a cooling process. The process involves heating the material above a transition temperature (the austenite or austenite-cementite temperature for steels), and then slowly (rapidly for aluminum and some others) cooling it. Rapid cooling can lock in strains and is used as a hardening process with many materials. injanier · 9 years ago. Annealing is used to get the steel (or other metal) into its softest state, trying to cool it slowly enough to allow practically all of the crystals to transform from their high-temperature state, to the natural room-temperature state. The process involves heating the material above a transition temperature (the austenite or austenite-cementite temperature for steels), and then slowly (rapidly for aluminum and some others) cooling it. Rapid cooling can lock in strains and is used as a hardening process with many materials. injanier · 9 years ago. Annealing is a NOUN.. Annealing is process in which metal, alloy, or other material are heating to a temperature, holding for a certain time, and then cooling to room temperature, done to improve ductility and reduce brittleness. This is used in industries before all the metal to be use.. 2. During annealing process, the temperature is slowly reduced so that the stress on the molecular level is removed the beads. 3. Annealing means the burning of metallic colors into glass, earthenware, etc. 4. To heat glass or metal and then cool slowly to prevent Annealing is a process by which the properties of steel are enhanced to meet machinability requirements. Annealing is a process of heating the steel slightly above the critical temperature of steel (723 degrees Centigrade) and allowing it to cool down very slowly. slide 2 of 3. 5. Isothermal Annealing – This is a process where is steel is heated above the upper critical temperature. This causes the structure of the steel to be converted rapidly into austenite structure. Annealing, in metallurgy and materials science, is a heat treatment that alters the physical and sometimes chemical properties of a material to increase its ductility and reduce its hardness, making it more workable. Annealing occurs by the diffusion of atoms within a solid material, so that the material progresses towards its equilibrium state. Heat increases the rate of diffusion by providing the energy needed to break bonds.
http://www.brighthubengineering.com/manufacturing-technology/50523-heat-treatment-of-steels-annealing/ http://entrance-exam.net/forum/general-discussion/what-does-annealing-mean-101848.html https://en.wikipedia.org/wiki/Annealing_%28metallurgy%29 http://www.technologystudent.com/equip1/heat3.htm https://answers.yahoo.com/question/index?qid=20060716213159AAKweFp https://answers.yahoo.com/question/index?qid=20060716213159AAKweFp http://entrance-exam.net/forum/general-discussion/what-does-annealing-mean-101848.html http://www.brighthubengineering.com/manufacturing-technology/50523-heat-treatment-of-steels-annealing/ https://en.wikipedia.org/wiki/Annealing_%28metallurgy%29
what does annealing mean