QUENCHING DILATOMETER RITA L78

This practice is based upon the principle that, during heating and cooling of steels, dimensional changes occur as a result of both thermal expansions associated with temperature change and phase transformation. In this practice, sensitive high-speed quenching dilatometer equipment is used to detect and measure the changes in dimension that occur as functions of both time and temperature during dened thermal cycles. The resulting data are converted to discrete values of strain for specic values of time and temperature during the thermal cycle. Strain as a function of time or temperature, or both,...

Operation Method Operation Method of Quenching Dilatometer A solid or hollow sample is continuously heated to a certain temperature plateau. At this plateau a continuous cooling is started. The cooling is repeated at different (linear or exponential) cooling rates. The phase transformations occurring in the different cooling cycles are indicated by the measured change of length. An array of cooling curves with different cool down cycles represents a continuous or isothermal TTT diagram (Time Temperature Transformation diagram). Start and stop of the transformation dene the elds of e.g. ferrite,...

Technical Specifications Features -Software • Program capable of text editing All LINSEIS thermo analytical instruments are PC controlled. The indi- • Data security in case of power failure vidual software modules exclusively run under Microsoft® Windows® • Thermocouple break protection operating systems. The complete software consists of 3 modules: tem- • Repetition measurements with minimum parameter input perature control, data acquisition and data evaluation. The 32 bit soft- • Evaluation of current measurement ware incorporates all essential features for measurement preparation, • Curve...

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