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Home > Heat Treatment Process of Grinding Balls in Suizhou Gaincin

Heat treatment process of grinding ball from Suizhou Gaincin Machinery Co.,Ltd


The heat treatment process of steel ball can be divided into three categories: heat treatment, surface heat treatment and chemical heat treatment. According to the different heating medium, heating temperature and cooling method, each class can be divided into several different heat treatment processes. The same kind of steel ball with different heat treatment process, can get different organization, thus have different performance. Steel is the most widely used metal in industry, and the microstructure of steel is also the most complex. Therefore a wide variety of steel heat treatment process.


The overall heat treatment is a heat treatment process for the whole body heating and then cooling at the appropriate rate to change its overall mechanical properties. There are four basic processes of annealing, normalizing, quenching and tempering.


Annealing is the workpiece heated to the appropriate temperature, according to the material and the workpiece dimensions using different soaking time and then slowly cooled, the purpose is to make the ball inside the organization at or near equilibrium, obtain good process performance and use of performance, or prepare for quench further. Normalizing the workpiece is heated to a suitable temperature after cooling in the air, the effect of normalizing and annealing are similar, but the organization received more fine materials commonly used to improve the cutting performance, is also sometimes used for some less demanding parts as the final heat treatment.


Quenching is to heat the workpiece after heat preservation, in water, oil or other inorganic salts, organic water solution, such as quenching medium cooling. The hardened steel hardens, but becomes brittle. In order to reduce the brittleness of the steel, the steel parts after quenching for a long time at room temperature above 650 degrees Celsius, and then cooling. This process is called tempering. Annealing, normalizing, quenching and tempering are four fires in the whole heat treatment". Among them, the quenching and tempering are closely related.


Four fire with different heating temperature and cooling methods, and the evolution of different heat treatment process. In order to obtain a certain strength and toughness, the combination of quenching and high temperature tempering process, known as quenching and tempering. After the formation of supersaturated solid solution, some alloys will be kept at room temperature or slightly higher temperature for a long time in order to improve the hardness, strength or electrical properties of the alloy. The heat treatment process is called aging treatment.


The deformation and heat treatment of the pressure and effective combination of closely, so that the workpiece to obtain a good strength, toughness of the method known as deformation heat treatment. Heat treatment in vacuum or vacuum is called vacuum heat treatment. The utility model not only can make the work piece not to be oxidized, does not remove the carbon dioxide, but also can keep the surface of the workpiece to be bright and clean after processing, and improve the performance of the workpiece.


Surface heat treatment is a kind of steel ball heat treatment process, which can only change the surface mechanical properties of the workpiece surface. In order to heat the workpiece surface and not only excessive internal heat incoming workpiece, the heat source used must have high energy density, which give greater heat in the unit area of the workpiece, the workpiece surface or in part to reach short-term or transient high temperature. The main methods of surface heat treatment are flame quenching and induction heating. Commonly used heat sources such as oxy acetylene or propane flame, induced current, laser and electron beam, etc..


Chemical heat treatment is a steel ball heat treatment process by changing the chemical composition, structure and properties of the surface of the workpiece. The difference between chemical heat treatment and surface heat treatment is that the latter changes the chemical composition of the surface. Chemical heat treatment is the workpiece on the carbon, nitrogen or other alloy elements of the medium (gas, liquid, solid) heating, heat preservation for a long time. So that the workpiece surface into the carbon, nitrogen, boron and chromium and other elements. After penetrating elements. Other heat treatment processes such as quenching and tempering are sometimes necessary. The main methods of chemical heat treatment are carburizing, nitriding and carburizing.


Heat treatment is one of the most important processes in the manufacture of machine parts and dies. Generally speaking. It can guarantee and improve the performance of the workpiece. Such as wear resistance, corrosion resistance, etc.. The structure and stress state of the blank can be improved, which is favorable for various cold and hot working.


For example, the white cast iron can be obtained after a long time annealing treatment of malleable iron, improve plasticity. The gear adopts the proper heat treatment process. The service life can be increased by several times or several times than that without heat treatment. In addition, the low cost carbon steel has a certain amount of alloy steel properties by infiltrating some alloying elements. Can replace some heat-resistant steel, stainless steel. Almost all of the tools need to be used before heat treatment.