Gray cast iron material for commercial vehicle brake drum and preparation method of gray cast iron material
A technology of gray cast iron and brake drum, which is applied in the field of gray cast iron materials for commercial vehicle brake drums and its preparation, can solve the problems of poor thermal fatigue performance, short service life of brake drums, poor thermal conductivity, etc., and achieve improved thermal performance. Effect of Fatigue Properties and Service Life
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Embodiment 1
[0032] The percentage by weight of each component of the commercial vehicle brake drum gray cast iron material described in Example 1 is as follows: C 3.75%, Si 1.7%, Mn 0.55%, S 0.07%, P 0.02%, Cu 0.5%, Cr 0.15%, V 0.08%, Sn 0.06%, Zr 0.02%, La0.008%, the balance is Fe and unavoidable impurities;
[0033] The preparation method of the commercial vehicle brake drum gray cast iron material is as follows:
[0034] (1) Put the raw materials into the electric furnace for smelting according to the above formula to obtain liquid raw materials;
[0035] (2) Raise the temperature of the liquid raw material in step (1) to 1510°C, remove the slag, add SiC pretreatment agent with a weight of 0.1% of the liquid raw material, and after 10 minutes, the temperature of the liquid raw material is reduced to 1490°C to obtain raw molten iron;
[0036] (3) Pour the original molten iron into the ladle, add SiMnZr inoculant of 0.2% by weight of molten iron in the ladle, add SiMnZr inoculant of 0.2...
Embodiment 2
[0039] The percentages by weight of the components of the commercial vehicle brake drum gray cast iron material in Example 2 are as follows: C3.85%, Si1.9%, Mn0.65%, S0.09%, P0.05%, Cu0.6% , Cr0.25%, V0.09%, Sn0.09%, Zr0.03%, La0.009%, the balance is Fe and unavoidable impurities;
[0040] The preparation method of the commercial vehicle brake drum gray cast iron material is as follows:
[0041] (1) Put the raw materials into the electric furnace for smelting according to the above formula to obtain liquid raw materials;
[0042] (2) Raise the temperature of the liquid raw material in step (1) to 1520°C, remove the slag, add SiC pretreatment agent with a weight of 0.1% of the liquid raw material, and after 13 minutes, the temperature of the liquid raw material is reduced to 1496°C to obtain raw molten iron;
[0043] (3) Pour the original molten iron into the ladle, add SiMnZr inoculant of 0.22% of the weight of molten iron in the ladle, add SiMnZr inoculant of 0.25% of the we...
Embodiment 4
[0046] The percentage by weight of each component of the commercial vehicle brake drum gray cast iron material described in Example 4 is as follows: C 3.8%, Si 1.8%, Mn 0.61%, S 0.08%, P 0.03%, Cu 0.55%, Cr 0.19%, V 0.085%, Sn 0.08%, Zr 0.025%, La 0.008%, the balance is Fe and unavoidable impurities;
[0047] The preparation method of the commercial vehicle brake drum gray cast iron material is as follows:
[0048] (1) Put the raw materials into the electric furnace for smelting according to the above formula to obtain liquid raw materials;
[0049] (2) Raise the temperature of the liquid raw material in step (1) to 1515°C, remove the slag, add SiC pretreatment agent with a weight of 0.1% of the liquid raw material, and after 13 minutes, the temperature of the liquid raw material is reduced to 1490°C to obtain raw molten iron;
[0050] (3) Pour the original molten iron into the ladle, add 0.20% SiMnZr inoculant by weight of molten iron in the ladle, and add SiMnZr inoculant b...
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