Abrasion-proof cast iron roll collar for straightening steel rail and preparation method thereof
A wear-resistant cast iron and roll ring technology, which is applied in the direction of rolls, metal rolling, manufacturing tools, etc., can solve the problems of easy cracks on the roll surface, high rail strength, and large deformation resistance, so as to achieve less processing and low production costs , the effect of high hardness and wear resistance
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Embodiment 1
[0034] ①Smelting outer cast iron: firstly mix ordinary scrap steel, graphite blocks, ferrochrome, ferrosilicon, ferromanganese, ferromolybdenum, ferroniobium, nickel plate and copper plate to heat and melt. After the molten iron is melted, add ferro-vanadium, and adjust the composition before the furnace to meet the requirements. After that, the temperature was raised to 1540℃, and then out of the furnace. During the outer layer of molten iron out of the furnace, 75Si-Fe and barium-containing Si-Fe (5-7% Ba, 65-70% Si, 0.8-1.5% Ca, 1.0-1.8 %Al, the remainder Fe) is used to inoculate the molten iron with the flow, and the rare earth magnesium alloy is used for the spheroidizing treatment by the flushing method. When the molten iron is 40-60% out of the furnace, the iron boron and iron tellurium are crushed to a small particle size of 6-10 mm. Blocks, wrapped in paper and thrown directly into the molten iron ladle, the molten iron can be poured after standing still and slagging off;...
Embodiment 2
[0043] ①Smelting outer cast iron: firstly mix ordinary scrap steel, graphite blocks, ferrochrome, ferrosilicon, ferromanganese, ferromolybdenum, ferroniobium, nickel plate and copper plate to heat and melt. After the molten iron is melted, add ferro-vanadium, and adjust the composition before the furnace to meet the requirements. After that, the temperature was raised to 1522℃, and then out of the furnace. During the outer layer of molten iron out of the furnace, 75Si-Fe and barium-containing Si-Fe (5-7% Ba, 65-70% Si, 0.8-1.5% Ca, 1.0-1.8 %Al, the remainder Fe) is used to inoculate the molten iron with the flow, and the rare earth magnesium alloy is used for the spheroidizing treatment by the flushing method. When the molten iron is 40-60% out of the furnace, the iron boron and iron tellurium are crushed to a small particle size of 6-10 mm. Blocks, wrapped in paper and thrown directly into the molten iron ladle, the molten iron can be poured after standing still and slagging off;...
Embodiment 3
[0052]①Smelting outer cast iron: firstly mix ordinary scrap steel, graphite blocks, ferrochrome, ferrosilicon, ferromanganese, ferromolybdenum, ferroniobium, nickel plate and copper plate to heat and melt. After the molten iron is melted, add ferro-vanadium, and adjust the composition before the furnace to meet the requirements Then the temperature was raised to 1549℃, and then out of the furnace. During the outer layer of molten iron out of the furnace, 75Si-Fe and barium-containing Si-Fe (5-7% Ba, 65-70% Si, 0.8-1.5% Ca, 1.0-1.8 %Al, the remainder Fe) is used to inoculate the molten iron with the flow, and the rare earth magnesium alloy is used for the spheroidizing treatment by the flushing method. When the molten iron is 40-60% out of the furnace, the iron boron and iron tellurium are crushed to a small particle size of 6-10 mm. Blocks, wrapped in paper and thrown directly into the molten iron ladle, the molten iron can be poured after standing still and slagging off;
[0053]...
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