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Etchant for chemical milling a high tungsten content superalloy and process
Etchant for chemical milling a high tungsten content superalloy and process
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机译:用于化学铣削高钨含量超合金的蚀刻剂和工艺
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摘要
Chemical milling of cast superalloys having high tungsten contents is advantageously accomplished with an etchant which consists by volume percent of 40-60 concentrated HNO3, 0.6-0.8 concentrated HF, 30-70 H2O, with which is included at least 0.008 moles/liter CuSO4 and 0.0016-0.025 moles/liter FeCl3. Preferably the molar ratio of CuSO4 to FeCl3 is 2:1 and etching is accomplished in the range 50 DEG -80 DEG C.
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