TECHNIQUE ESTABLISHING STAMPING CAPABILITY OF MOLYBDENUM SHEETS WITHOUT SURFACE RUPTURE Russian patent published in 2004 - IPC

FIELD: mechanical engineering, electric vacuum production of cup-shaped parts by stamping. SUBSTANCE: technique establishing stamping capability of molybdenum sheets without surface rupture consists in test of Rockwell hardness of sheet surface with load of 100.0 kgf. Thereafter parts are stamped from such sheet. In this case value of hardness HRC₁₀₀ is converted to HV₅₀ by relation HV₅₀ = 7,24•HRC₁₀₀-33,9, hardness of sheet surface HV₅ is established, hardness difference by thickness of sheet ΔHV =HV₅-HV₅₀ is computed and capability of molybdenum sheet for stamping is calculated theoretically by relation Б(%) = 174,8-3,2875•ΔHV.. EFFECT: technique makes it feasible to establish hardness difference of surface layer and core of molybdenum sheet. 2 dwg