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 d

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] The preparation method of the ductile iron material provided by the present invention includes the following steps:

[0028] (1) Weigh the charge, according to the weight percentage, the charge includes: pig iron 45%-65%, ductile iron recharge charge 5%-20%, scrap steel 30%-45%, recarburizer 0.4%-0.9%, ferrosilicon 0.6% ~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 weight percentage, the charge includes: 60% pig iron, 5% nodular iron recycle charge, 35% scrap steel, 0.7% recarburizer, 0.9% ferrosilicon, 1.3% electrolytic copper, and 0.15 tin ingot %, antimony iron 0.035%. In the nodular cast iron material provided by the present invention, the proportion of pig iron is not less than 45% to ensure that the original molten iron has sufficient nucleation core; the proportion of scrap steel is controlled above 30%, so that the molten iron has sufficient nitrogen conten...

Example Embodiment

[0034] Example 1

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

[0036] Table 1

[0037]

[0038] The properties and metallography of the ductile iron material are shown in Table 2.

[0039]

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

[0041] (1) Weigh the charge for use. The charge includes: 60% pig iron, 5% cast iron recycle charge, 35% steel scrap, 0.7% recarburizer, 0.9% ferrosilicon, 1.3% electrolytic copper, and tin ingots. 0.15%, antimony iron 0.035%.

[0042] (2) Add scrap steel, recarburizer, nodular iron recharge, ferrosilicon and pig iron into the electric furnace in turn for smelting. After being completely melted, add electrolytic copper, tin ingot and antimony iron, and raise the temperature to 1410℃~1450℃. Analyze the composition, adjust the composition to meet the requirements of Table 3, quickly raise the temperature to 1470℃~1500℃, and keep it for 2~5min.

[00...

Example Embodiment

[0049] Example 2

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

[0051] (1) Weigh the charge for use. The charge includes: 60% pig iron, 5% cast iron recycle charge, 35% steel scrap, 0.7% recarburizer, 0.9% ferrosilicon, 1.3% electrolytic copper, and tin ingots. 0.15%, antimony iron 0.035%.

[0052] (2) Add scrap steel, recarburizer, nodular iron recharge, ferrosilicon and pig iron into the electric furnace in turn for smelting. After being completely melted, add electrolytic copper, tin ingot and antimony iron, and raise the temperature to 1410℃~1450℃. Analyze the composition, adjust the composition to meet the requirements of Table 3, quickly raise the temperature to 1470℃~1500℃, and keep it for 2~5min.

[0053] (3) The temperature of the molten iron in the furnace is reduced to 1420℃~1460℃, and the molten iron is quickly poured into the ladle, while spheroid...

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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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