A kind of free-cutting lead brass bar with excellent cold working plasticity and preparation method thereof
A lead brass and easy-cutting technology, which is applied in the field of free-cut lead brass rods and its preparation, can solve the problems of poor cold-working plasticity and easy cracking, and achieve excellent cold-working plasticity, improve product plasticity, and eliminate product stress.
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Embodiment 1
[0029] The present embodiment provides a free-cutting lead-brass rod with excellent cold working plasticity, and its preparation process includes the following steps:
[0030] 1. Smelting and casting: in weight percentage, weigh the corresponding raw materials according to the components shown in Table 1, and mix 1# red copper, 2# red copper, copper-iron alloy, brass scraps, lead brass scraps, tin phosphor bronze scraps, zinc scraps White copper scrap, zinc ingots, lead ingots, copper-magnesium alloys, and copper-phosphorus alloys are sequentially added to the induction furnace for melting in batches at a melting temperature of 1080°C. After all the metal is melted, stir well and let stand for 20 minutes. The above alloys were continuously cast horizontally, with a casting size of 200 mm, and the ingots were sawed on a semi-automatic horizontal metal band saw with a sawing length of 1200 mm.
[0031] 2. Extrusion: The ingot is heated in an intermediate frequency induction hea...
Embodiment 2
[0040] The present embodiment provides a free-cutting lead-brass rod with excellent cold working plasticity, and its preparation process includes the following steps:
[0041] 1. Smelting and casting: in weight percentage, weigh the corresponding raw materials according to the components shown in Table 1, and mix 1# red copper, 2# red copper, copper-iron alloy, brass scraps, lead brass scraps, tin phosphor bronze scraps, zinc scraps White copper scrap, zinc ingots, lead ingots, copper-magnesium alloys, and copper-phosphorus alloys are sequentially added to the induction furnace for melting in batches at a melting temperature of 1060°C. After all the metal is melted, stir well and let stand for 20 minutes. The above alloys were continuously cast horizontally, with a casting size of 2450 mm, and the ingots were sawed on a semi-automatic horizontal metal band saw with a sawing length of 800 mm.
[0042] 2. Extrusion: The ingot is heated in a medium frequency induction heating fu...
Embodiment 3
[0051] The present embodiment provides a free-cutting lead-brass rod with excellent cold working plasticity, and its preparation process includes the following steps:
[0052] 1. Smelting and casting: in weight percentage, weigh the corresponding raw materials according to the components shown in Table 1, and mix 1# red copper, 2# red copper, copper-iron alloy, brass scraps, lead brass scraps, tin phosphor bronze scraps, zinc scraps White copper scrap, zinc ingots, lead ingots, copper-magnesium alloys, and copper-phosphorus alloys are sequentially added to the induction furnace for melting in batches at a melting temperature of 1080°C. After all the metal is melted, stir well and let stand for 20 minutes. The above alloys were continuously cast horizontally, with a casting size of 200 mm, and the ingots were sawed on a semi-automatic horizontal metal band saw with a sawing length of 1200 mm.
[0053] 2. Extrusion: The ingot is heated in an intermediate frequency induction hea...
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Abstract
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