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Nodular cast iron material and preparation method thereof

A technology for ductile cast iron and molten iron, applied in the field of ductile iron materials and their preparation, can solve the problems of difficult preparation process, large deviation, and insufficient hardness, and achieve the effects of strong process controllability, low production cost, and good hardness uniformity

Active Publication Date: 2016-12-07
KOCEL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the difficulties in the preparation process of ductile iron materials in the prior art and the problems that the hardness is not high enough and the deviation is relatively large, the present invention proposes a high-hardness ductile iron material with low production cost and simple process and its preparation method

Method used

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  • Nodular cast iron material and preparation method thereof
  • Nodular cast iron material and preparation method thereof
  • Nodular cast iron material and preparation method thereof

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preparation example Construction

[0027] The preparation method of ductile iron material provided by the present invention may further comprise the steps:

[0028] (1) Weigh the charge, according to the weight percentage, the charge includes: 45%-65% of pig iron, 5%-20% of nodular iron return charge, 30%-45% of scrap steel, 0.4%-0.9% of recarburizer, and 0.6% of ferrosilicon ~1.0%, electrolytic copper 1.2%~1.6%, tin ingot 0.13%~0.16%, antimony iron 0.025%~0.045%. In a preferred embodiment of the present invention, according to the weight percentage, the charge includes: 60% pig iron, 5% nodular iron return charge, 35% steel scrap, 0.7% recarburizer, 0.9% ferrosilicon, 1.3% electrolytic copper, 0.15% tin ingot %, antimony iron 0.035%. For the nodular cast iron material provided by the present invention, the proportion of pig iron is not less than 45%, ensuring that the original molten iron has sufficient nucleation cores; the proportion of scrap steel is controlled above 30%, so that there is sufficient nitrog...

Embodiment 1

[0035] The main chemical composition of the ductile iron material in this embodiment is shown in Table 1.

[0036] Table 1

[0037]

[0038] The performance and metallographic phase of the ductile iron material are shown in Table 2.

[0039]

[0040] The preparation method of the ductile iron material comprises the following steps:

[0041] (1) Weigh the charge for use, and the charge includes: 60% pig iron, 5% ductile iron return charge, 35% scrap steel, 0.7% recarburizer, 0.9% ferrosilicon, 1.3% electrolytic copper, tin ingot according to weight percentage 0.15%, iron antimony 0.035%.

[0042] (2) Add steel scrap, recarburizer, nodular iron return charge, ferrosilicon and pig iron to the electric furnace for smelting in turn, and after complete melting, add electrolytic copper, tin ingot and iron antimony, and raise the temperature to 1410℃~1450℃ Component analysis, after adjusting the components to meet the requirements of Table 3, quickly raise the temperature to ...

Embodiment 2

[0050] The main chemical components and measurement results of the ductile iron material in this embodiment are shown in Table 5. Its preparation method is as follows:

[0051] (1) Weigh the charge for use, and the charge includes: 60% pig iron, 5% ductile iron return charge, 35% scrap steel, 0.7% recarburizer, 0.9% ferrosilicon, 1.3% electrolytic copper, tin ingot according to weight percentage 0.15%, iron antimony 0.035%.

[0052] (2) Add steel scrap, recarburizer, nodular iron return charge, ferrosilicon and pig iron to the electric furnace for smelting in turn, and after complete melting, add electrolytic copper, tin ingot and iron antimony, and raise the temperature to 1410℃~1450℃ Component analysis, after adjusting the components to meet the requirements of Table 3, quickly raise the temperature to 1470°C ~ 1500°C, and keep it warm for 2 ~ 5min.

[0053] (3) Lower the temperature of the molten iron in the furnace to 1420°C to 1460°C, quickly pour the molten iron into t...

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Abstract

The invention discloses a nodular cast iron material and a preparation method thereof. The nodular cast iron material comprises the following components of, by weight, 3.300%-3.700% of carbon, 1.800%-2.400% of silicon, 0.100%-0.300% of manganese, 0.060%-0.120% of sulfur, 0.000%-0.050% of phosphorus, 1.200%-1.500% of copper, 0.120%-0.150% of tin, 0.020%-0.040% of antimony, 0.040%-0.060% of magnesium, 0.003%-0.010% of cerium, and the balance iron. The nodular cast iron material is 310 HB-340 HB in hardness, has good hardness uniformity and is suitable for production of heavy-section abrasion-resistant components. The production process of the nodular cast iron material is simple and convenient, the procedure is high in controllability, the production cost is low, and large-scale application and popularization are easy.

Description

technical field [0001] The invention relates to a nodular cast iron material and a preparation method thereof, in particular to a nodular cast iron material used for thick and large section wear-resistant parts and a preparation method thereof. Background technique [0002] High-hardness ductile iron has high strength, hardness and good toughness. Its performance is comparable to that of cast steel, and it has great economic advantages compared with cast steel. It is increasingly used in large wear-resistant parts. Such components rub against hard foreign objects repeatedly during use, and are subjected to high load and high moment. The service conditions are very harsh, and there are high requirements for the structure and performance of the material. [0003] This kind of wear-resistant parts are generally thick and large section ductile iron (wall thickness ≥ 100mm), the general wall thickness is 150mm ~ 250mm, the maximum can reach more than 300mm, the control of graphit...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C33/08C21C1/10
CPCY02P10/20
Inventor 郭亮韩军孙升尤国庆陶涛潘俊安晓雷
Owner KOCEL EQUIP
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