Low temperature spheroidal graphite cast iron material and preparation method and application thereof
A ductile iron, low temperature technology, applied in the field of low temperature ductile iron material and its preparation, can solve problems such as poor impact resistance, and achieve the effects of good low temperature impact resistance, good mechanical strength, low temperature impact performance, and high mechanical strength
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[0036] The present invention also provides a method for preparing the low-temperature ductile iron material described in the above technical solution, comprising the following steps:
[0037] Spheroidizing, inoculating and casting the alloy liquid having the above-mentioned element ratio in sequence to obtain an ingot having the above-mentioned element ratio;
[0038] The ingot having the above-mentioned element ratio is heat-treated to obtain the low-temperature ductile iron material.
[0039] In the present invention, the alloy liquid with the above-mentioned element ratio is sequentially subjected to spheroidization treatment, inoculation treatment and casting to obtain an ingot with the above-mentioned element ratio; in the present invention, the preparation of the alloy liquid with the above-mentioned element ratio is preferably It is: according to the above-mentioned ratio, the above-mentioned corresponding alloy raw materials are smelted to obtain the alloy liquid with ...
Embodiment 1
[0052] Composition of low temperature ductile iron material: by mass percentage, including the following alloying elements: C3.50%, Si2.13%, Mn 0.20%, S 0.015%, P 0.02%, Cr 0.014%, Ni 0.77%, Mg 0.43 %, Re0.008%, Ti 0.018%, and the rest of iron and unavoidable impurities;
[0053] According to the above ratio, the pig iron and other elements corresponding to the alloy raw materials are smelted to obtain the alloy liquid (1550° C.) with the above element ratio;
[0054] The alloy liquid is sequentially subjected to spheroidization treatment (the nodulizer is ELmag5800, the particle size is 3-20mm, and the mass is 1.2% of the mass of the alloy liquid), inoculation treatment (inoculant: Si 78%, Ba 2%, Al 0.8% and Ca 1.0% and the iron of balance; Quality is 1.1% of described alloy liquid quality) and cast, obtain the ingot with above-mentioned proportioning;
[0055] First, the ingot with the above-mentioned element ratio is raised from a heating rate of 100°C / min to 650°C, and af...
Embodiment 2
[0057] Composition of low temperature ductile iron material: by mass percentage, including the following alloying elements: C 3.8%, Si2.15%, Mn 0.16%, S 0.012%, P 0.023%, Cr 0.014%, Ni 0.83%, Mg 0.54% , Re0.005%, Ti 0.01%, and the balance of iron and unavoidable impurities;
[0058] According to the above ratio, the pig iron and other elements corresponding to the alloy raw materials are smelted to obtain the alloy liquid (1550° C.) with the above element ratio;
[0059] The alloy liquid is sequentially subjected to spheroidization treatment (the nodulizer is ELmag5800, the particle size is 3-20mm, and the mass is 1.2% of the mass of the alloy liquid), inoculation treatment (inoculant: Si 78%, Ba 2%, Al 0.8% and Ca 1.0% and the iron of balance; Quality is 1.1% of described alloy liquid quality) and cast, obtain the ingot with above-mentioned proportioning;
[0060] First, the ingot with the above-mentioned element ratio is raised from a heating rate of 100°C / min to 650°C, and...
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