Free-cutting nickel brass alloy and preparation method thereof
A nickel-brass, easy-cutting technology, applied in the field of free-cutting nickel-brass alloy and its preparation, can solve the problems of cutting performance and mechanical performance to be improved, high burning loss rate, etc., and achieve the effect of superior cutting performance and mechanical performance
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Embodiment 1
[0014] Embodiment 1: A kind of free-cutting nickel brass alloy, its chemical composition is: copper 62.5wt%, nickel 0.25wt%, lead 0.18wt%, arsenic 0.13wt%, aluminum 0.05wt%, manganese 0.03wt%, tin 0.06 wt%, iron 0.03 wt%, cerium 0.02 wt%, neodymium 0.04wt%, cobalt 0.03wt%, titanium 0.02wt%, germanium 0.03 wt%, holmium 0.02wt%, the balance is zinc and unavoidable impurities, of which not The content of avoided impurities does not exceed 0.2 wt%;
[0015] Its preparation method is as follows:
[0016] 1) Pretreatment A: Raise the temperature of the furnace to 1120°C, put in 8 wt% copper, and after complete melting, add the formula amounts of cerium, germanium and neodymium in turn, keep it warm for 12 minutes and pour it to obtain alloy a;
[0017] 2) Pretreatment B: Raise the temperature of the furnace to 1500°C, put in 29 wt% copper, and after complete melting, add cobalt, titanium, holmium, iron, nickel and manganese in sequence, keep warm for 20-30min and then pour , to ob...
Embodiment 2
[0020] Embodiment 2: A kind of free-cutting nickel brass alloy, its chemical composition is: copper 62wt%, nickel 0.2wt%, lead 0.15wt%, arsenic 0.1wt%, aluminum 0.02wt%, manganese 0.02wt%, tin 0.04wt% %, iron 0.01 wt%, cerium 0.01 wt%, neodymium 0.02 wt%, cobalt 0.01 wt%, titanium 0.01 wt%, germanium 0.02 wt%, holmium 0.01 wt%, the balance is zinc and unavoidable impurities, of which unavoidable The content of impurities does not exceed 0.2 wt%;
[0021] Its preparation method is as follows:
[0022] 1) Pretreatment A: raise the temperature of the furnace to 1100°C, put in 5 wt% copper, and after complete melting, add cerium, germanium and neodymium in sequence, keep warm for 10 minutes and pour to obtain alloy a;
[0023] 2) Pretreatment B: raise the temperature of the furnace to 1450 ℃, put in 23 wt% copper, and after complete melting, add the formula amount of cobalt, titanium, holmium, iron, nickel and manganese in sequence, and pour after holding for 20 minutes. Alloy b...
Embodiment 3
[0026] Embodiment 3: A kind of free-cutting nickel-brass alloy, its chemical composition is: copper 63wt%, nickel 0.3wt%, lead 0.2wt%, arsenic 0.15wt%, aluminum 0.08wt%, manganese 0.04wt%, tin 0.07wt% %, iron 0.06 wt%, cerium 0.03 wt%, neodymium 0.05 wt%, cobalt 0.05 wt%, titanium 0.03 wt%, germanium 0.05 wt%, holmium 0.04 wt%, the balance is zinc and unavoidable impurities, of which unavoidable The content of impurities does not exceed 0.2 wt%;
[0027] Its preparation method is as follows:
[0028] 1) Pretreatment A: Raise the temperature of the furnace to 1150°C, put in 11wt% copper, and after complete melting, add cerium, germanium and neodymium in the formula in sequence, keep it warm for 15 minutes, and pour it to obtain alloy a;
[0029] 2) Pretreatment B: raise the temperature of the furnace to 1550°C, put in 34wt% copper, and after complete melting, add the formula amount of cobalt, titanium, holmium, iron, nickel and manganese in sequence, keep it warm for 30 minute...
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