Prediction of Quench-Harndess Within The Whole Volume of Axially-Symmetric Workpieces of Any Shape
B. Liščić, S. Singer, B. Smoljan:
PREDICTION OF QUENCH-HARDNESS WITHIN THE WHOLE VOLUME OF AXIALLY-SYMMETRIC WORKPIECES OF ANY SHAPE,
Journal of ASTM International, Vol.7, No.2, (Paper ID JAI102647)
A quench probe, based on Temperature Gradient method was used to measure and record cooling curves when quenching real axially symmetric workpieces of any complex shape in liquid quenchants. Calculation of relevant heat transfer coefficients is based on the cooling curve measured just be-low surface of the cylindrical probe of 50 mm diameter. A two-dimensional computer program, based on the cooling time from 800°C to 500°C (t8/5), and the Jominy hardenability curve of the steel grade in question, is used to predict the hardness distribution within the whole volume of the workpiece, all at once, which is a unique feature of this method.