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Changes in Mechanical Properties along with Tempering:
Tempering enhances the toughness and ductility of quenched steel though decreases hardness. Following figure demonstrates how these properties are influenced with tempering. The tempering temperature is consequently chosen such it results in the required combination of the properties. Several steel shows drop in impact values in the specific tempering temperatures range. Third drop is a suggestion of brittleness and that range should be ignored. For mild steel this brittleness as termed blue brittleness happens at a tempering temperature of about 300oC.
Figure: Tempering Diagram of Property Chart for Water Quenched 26 mm Diameter Bars of Eu-12 Steel as Scale for Stress Only
Ratio of belt tension: For Open belt drive: Angle of contact (θ) for larger pulley = ∏ + 2α Angle of contact (θ) for smaller pulley = ∏ - 2α For cross belt drive:
METAL TRANSFER IN CO2 WELDING In CO 2 welding, two distinct types of metal transfers are identified viz. short circuiting transfer and free flight globular transfer. Short Cir
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Radiu s of Gyration (K) The radius of gyration of given lamina about given axis is that distance from te given axis at which all the elemental parts of lamina would have to be
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