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The cutting wheel burns with

Time:2012.05.23 News sources:Yangzhong Hongtu Grinding Tools Co.,Ltd. Browse the number:

Wheel during cutting, the workpiece is often oxidation discoloration, which is a lot of users do not want to happen, certain industries, such as the nuclear industry, equipment for processing, is strictly prohibited oxidative discoloration. Therefore, the phenomenon of study, and find how to reduce or even completely eliminate the phenomenon of burn, the high-end wheel developed a new topic.

, Burns the substance we first explore the reasons of the burn. In fact, this reason is not complicated, and the help of some equipment and mechanism of this reason it is easy to figure out, that is, high-temperature oxidation discoloration. Fe + O2 = FexOy (x = 2 or 3, y = 3 or 4) at high temperatures, the oxygen in the air will be metal, mainly iron, oxidation of the different ingredients. Fe2O3 as red and black, Fe3O4, a mixture of both colors, according to the proportion of different show different colors of blue and so on. Some workpieces contain traces of other metals in the oxidation of the color slightly different. So if we are to of the problem studied, it comes down to the following aspects: how to reduce heat generation;, how to improve the cutting efficiency to reduce meaningless friction;, can reduce oxygen contact with the workpiece; four there is no update of other ideas; five, the program can be applied to all the conditions, such as INOX wheel. How to reduce heat generation in fact, how to improve cutting efficiency, and the ability to cut off from oxygen contact with the workpiece, the content of these three issues is the author discussed in the previous article "How to improve high temperature performance of the wheel".

Therefore, the program provided in the previous article on the problems. But there is no doubt that not all of the answers, there will be some more basic research to tell us the mysteries of the grinding process. This paper focuses on the fourth and fifth two points. MKC-S, anti-burn elite ----- MKC-S is the wisdom of years of research by the Austrian the Chemetall companies in the anti-burn. Above the role of iron sulfide, although it could partially improve the efficiency of cutting grinding, but in some formula or poor working conditions are still insufficient to prevent burn phenomenon, we need to find more efficient materials. But often a single set of copies of the materials can not meet the complex requirements of MKC-S is a composite of multiple properties of new materials.

Let's take a look at the TGA diagram of the MKC-S. From the TGA analysis, MKC-S has the following characteristics:

 Liquefaction, occurred about 1,510 degrees in a very good lubricant in the wheel, the wheel is easy to reach this temperature, thus MKC is very easy to play a role; about 2,800 degrees to generate tiny vaporization layer, play an isolated heat the absence of oxygen, to protect the role of the grinding wheel; 3, loss of focus on more than 900 degrees, and after a high temperature of 1200 degrees, the material is still about 50% remaining, hence, have the basis of the work in the high temperature environment. Change of grinding wheel, grinding contact point in the process of working surface of grinding wheel and workpiece contact point what is the situation? If the to MKC material, will produce what kind of changes? Austria Chemetall MKC-S structure from the microscopic point of view and wheel contact with the interface changes. MKC material is very soft, easily occur between the layer and the layer pan, under pressure, these soft and prone layer shift filler will fill the wheel surface depression, and do not add the material of the wheel contact surface contact surface increases, that is a significant increase in the point of contact between the grinding wheel and workpiece, such as the original two points of contact, later increased to four by adding lubricant. In this way, the original two points of the pressure, temperature on the distribution of four points, the pressure in each point, the heat will be significantly reduced. This not only reduces the wear of the wheel, but also to improve the high temperature performance of the grinding wheel. It is difficult to have the role of other materials.

 Four, MKC-S anti-ablation chemical mechanism of MKC-S through the layer shift to change the characteristics of the point of contact, as well as the characteristics of the low melting point low vaporization point belong to its physical properties. Materials Chemistry has no features to make it to prevent burns? Have. MKC-S is chlorine - Mn phase multi-element composite material by a complex formula designed to make the material at high temperatures under the automatic formation of a chemical reaction produces a gas, the gas and ferrous metal chemical reaction with high activity in oxygen. Although there will be the surface of the iron atom has given priority to a chemical reaction with the gas, loss of activity, the oxygen can not occur with the iron metal oxidation, the work will not burn, and the gas and iron react to form the resultant color, but because of very low boiling point, the course of their work has been fully volatile, will not be left in the steel surface, so the workpiece does not change color. Wheel during cutting, the workpiece is often oxidation discoloration, which is a lot of users do not want to happen, certain industries, such as the nuclear industry, equipment for processing, is strictly prohibited oxidative discoloration.

Therefore, the phenomenon of study, and find how to reduce or even completely eliminate the phenomenon of burn, the high-end wheel developed a new topic.

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