Heat treatment process - Part2

- Jul 17, 2020-

Heat treatment process - Part2


Features1. Reduce or eliminate inner pressure after quenching and reduce deformation and cracking of the workpiece.2. Adjust the hardness, improve the plasticity and longevity, and acquire the mechanical residences required for the work.. Stabilize the workpiece sizeApplication1. Keep the metallic excessive temperature and wear resistance after quenching with low temperature tempering, and use medium temperature temoering to preserve high effect toughness and plasticity whilst growing the pliancy and vield strength of steel beneath certain sturdiness conditions. Mainly, while there is enough energy, mood with excessive temperature.2. The widespread steel have to be avoided at 230-280 ranges. And the stainless metal need to be tempered between 400-450 levels, because there could be a mood brittleness.Cold treatmentOperation methodThe quenched metal is cooled to-60 to-80 ranges or decrease in a low temperature medium (inclusive of dry ice, liquid nitrogen), and the temperature is uniform and then taken out to room temperature.Features1. The entire or maximum of the retained austenite in the hardened steel is transformed into martensite, thereby enhancing the.Hardness, electricity, wear resistance and fatigue restriction of the steel.2. Stabilize the structure of the steel to stabilize the form and size of the metallic


Features1. Reduce or eliminate internal stress after quenching and reduce deformation and cracking of the workpiece.2. Adjust the hardness, improve the plasticity and toughness, and obtain the mechanical properties required for the work.. Stabilize the workpiece sizeApplication1. Keep the steel high temperature and wear resistance after quenching with low temperature tempering, and use medium temperature temoering to maintain high impact toughness and plasticity when increasing the elasticity and vield strength of steel under certain toughness conditions. Mainly, when there is sufficient strength, temper with high temperature.2. The general steel should be avoided at 230-280 degrees. and the stainless steel should be tempered between 400-450 degrees, because there will be a temper brittleness.Cold treatmentOperation methodThe quenched steel is cooled to-60 to-80 degrees or lower in a low temperature medium (such as dry ice, liquid nitrogen), and the temperature is uniform and then taken out to room temperature.Features1. The whole or most of the retained austenite in the hardened steel is converted into martensite, thereby improving the.hardness, strength, wear resistance and fatigue limit of the steel.2. Stabilize the structure of the steel to stabilize the shape and size of the steel



CarburizationOperation method:The steel is placed in a carburizing medium, heated to 900-950 degrees and insulated to obtain a carburized layer of a certain concentration and depth on the steel surface.Features:Imorove the surface hardness, wear resistance and fatigue strength of steel parts, and the heart remains in a tough state.Application:1. For low carbon steel and low alloy steel parts with a carbon content of 0.15% to 0.25%, the depth of the carburized layer is generally 0.5 to 2.5 mmt.2. After carburizing, quenching must be carried out to obtain martensite on the surface to achieve the purpose ofcarburizing.