Nowadays gray cast iron still represents an adequate material for many products. But if the requirements on strength increase, gray cast iron bows out because of the limited tensile strength. In this case compacted graphite iron is the material of choice. But in past years the increasing material costs and the poor castability expedited the development of new materials. In this development austempered gray iron is of utmost importance. By a special heat treatment a microstructure is generated which is comparable to ADI materials an which causes a clearly higher tensile strength without alloying. But for a wider industrial use the ... More...


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