Die Casting Copper Rotors - Copper Development Association
Die Casting Copper Rotors - Copper Development Association
Die Casting Copper Rotors - Copper Development Association
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Heat radiation Q StQ St= A DGW*? *C S* ( T WO4- T UM4)A DGW = Contact face of the die to the surrounding air [ m 2 ]? = Emissions degreeC S = Stefan-Boltzmann-constant for the black body5.67 * 10 -8 W / m 2 K 4T WO = Surface temperature of the die [K]T UM = Surrounding temperature [K]Example: Emissions degree of steel? steel bright grinded 0.25steel little rusty 0.6steel strong rusty 0.8( values at 293 K )