Chromium-molybdenum-copper alloy vermicular iron brake drum and preparation method thereof
A copper alloy and brake drum technology, applied in the field of brake drums, can solve the problems of reduced machining performance and increased processing cost, and achieves the effects of improving strength, improving high temperature stability and good thermal conductivity
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Embodiment 1
[0036] A brake drum: configured as the following components by weight percentage: 3.8% carbon, 1.2% silicon, 0.4% manganese, 0.25% chromium, 0.40% molybdenum, 0.45% copper, 0.02% magnesium, rare earth (lanthanum, cerium and The mass fraction is 50%, 50% mixed) 0.02%, and the balance is iron and unavoidable impurities.
[0037] The preparation method is as follows: use nodular iron, scrap steel, ferromanganese, ferrosilicon, ferrochrome, ferromolybdenum and copper plate as raw materials, mix all the raw materials, melt them in an intermediate frequency induction furnace at a temperature of 1520°C, and wrap the casting treatment in a Baking at 350°C, and then placing the vermicularizing agent, inoculant and vermicular iron filings at the bottom of the bag for compaction; wherein the vermicularizing agent is rare earth magnesium-aluminum alloy, and the amount of vermisifying agent added is 0.8% of the mass of the smelting liquid; The inoculant used is ferrosilicon alloy, and its ...
Embodiment 2
[0048] A kind of brake drum, preparation method is as follows: be configured as following composition by weight percentage: carbon 3.5%, silicon 1.6%, manganese 0.3%, chromium 0.45%, molybdenum 0.2%, copper 0.6%, magnesium 0.04%, rare earth (lanthanum )0.02%, the balance is iron and unavoidable impurities. Using nodular iron, scrap steel, ferromanganese, ferrosilicon, ferrochrome, ferromolybdenum and copper plate as raw materials, all raw materials are mixed and smelted in an intermediate frequency induction furnace. Baking, then put the vermicularizing agent, inoculant and vermicular iron filings on the bottom of the bag for compaction; wherein the vermisifying agent is rare earth magnesium aluminum alloy, and the amount of vermisifying agent added is 0.5% of the mass of the smelting liquid; the used inoculant The inoculant is ferrosilicon alloy, and its addition amount is 0.6% of the mass of the smelting liquid, wherein 0.5% of the inoculant covers the vermicular agent, and ...
Embodiment 3
[0054] A kind of brake drum, preparation method is as follows: be configured as following composition by weight percentage: carbon 3.9%, silicon 1.0%, manganese 0.6%, chromium 0.10%, molybdenum 0.5%, copper 0.3%, magnesium 0.01%, rare earth (cerium )0.02%, the balance is iron and unavoidable impurities.
[0055] Using nodular iron, scrap steel, ferromanganese, ferrosilicon, ferrochrome, ferromolybdenum and copper plate as raw materials, all raw materials are mixed and smelted in an intermediate frequency induction furnace with a furnace temperature of 1510°C. Baking, and then put the vermicular agent, inoculant and vermicular iron filings on the bottom of the bag for compaction; wherein the vermicular agent is rare earth magnesium aluminum alloy, and the amount of vermicular agent added is 1.2% of the mass of molten iron; the used inoculant The inoculant is ferrosilicon alloy, and its addition amount is 1.2% of the mass of the smelting liquid, of which 0.4% of the inoculant co...
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