Sea water corrosion resistant low-alloy cast iron

A low-alloy, seawater-resistant technology, applied in the field of new corrosion-resistant alloy cast iron materials, can solve the problems of low cost and high cost of corrosion-resistant alloy cast iron, and achieve the effects of reducing overall consumption, good economic benefits, and saving precious metal resources

Inactive Publication Date: 2008-07-23
山东省耐磨耐蚀材料工程技术研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned technical problem of high cost of corrosion-resistant alloy cast iron, and provide a seawater corrosion-resistant low-alloy cast iron with low cost and corrosion resistance similar to or better than the above-mentioned corrosion-resistant alloy cast iron

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: A corrosion-resistant cast iron material for seawater engineering, used for castings such as the top sill, bottom sill, side rail of the gate of the sea blocking dam, containing (weight percent) nickel Ni0.92, chromium Cr1.72, silicon Si1.92 , carbon C2.95, manganese Mn0.72, copper Cu2.45, rare earth elements RE0.15, impurities controlled at P≤0.12 and S≤0.06, calculate the type and quantity of the applied ferroalloy according to the above design components, and use the medium frequency induction furnace Or melt the molten iron in an electric arc furnace, add ferroalloy in the later stage of melting, and add rare earth ferrosilicon alloy for rare earth elements before it is released from the furnace. The temperature of the furnace is controlled at 1440-1480 °C. Instantaneous inoculation with flow is carried out, and the pouring temperature is controlled at 1380-1420°C. After testing and testing, the casting has good comprehensive mechanical properties and ...

Embodiment 2

[0026] Embodiment two: a kind of corrosion-resistant cast iron material for seawater engineering is used to manufacture castings such as water pump impellers, casings, and pipelines of facilities such as seawater desalination and power station seawater cooling, containing (weight percent) nickel Ni0.62, chromium Cr2 .42, silicon Si2.23, carbon C3.42, manganese Mn0.91, copper Cu2.92, rare earth elements RE0.15, impurities controlled at P≤0.12 and S≤0.06, the type of ferroalloy used is calculated according to the above design composition , quantity, use medium frequency induction furnace or other smelting furnace to melt molten iron, add ferroalloy in the later stage of melting, rare earth element is added with rare earth ferrosilicon alloy before the furnace is released, the temperature of the furnace is controlled at 1440-1480 ℃, and the long-term strengthening inoculant is used for the furnace. Inoculation is strengthened in the ladle, and instantaneous inoculation is carried ...

Embodiment 3

[0029] Embodiment three: a kind of corrosion-resistant cast iron material for seawater engineering is used to manufacture castings such as water pump impellers, casings, pipelines of facilities such as seawater desalination and power station seawater cooling, containing (weight percent) nickel Ni 1.58, chromium Cr1. 61, silicon Si2.23, carbon C3.42, manganese Mn0.91, copper Cu1.64, rare earth elements RE0.15, impurities controlled at P≤0.12 and S≤0.06. Calculate the type and quantity of the ferroalloy to be used according to the above design components, use the medium frequency induction furnace or other smelting furnace to melt the molten iron, add the ferroalloy at the later stage of melting, and add the rare earth ferrosilicon alloy for rare earth elements before the furnace is released, and the temperature of the furnace is controlled at 1440 ~ 1480 ℃ , use long-acting inoculant to intensify inoculation in ladle when it comes out of the furnace, and conduct instantaneous in...

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PUM

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Abstract

The invention discloses a seawater corrosion-resistant low alloy cast iron, which is mainly used for manufacturing components in seawater hydraulic projects. Adopting the weight percentage as unit, the seawater corrosion-resistant low alloy cast iron comprises 0.6 to 1.6 Ni, 1.5 to 3.0 Cr, 1.8 to 2.8 Si, 2.8 to 3.6 C, 0.6 to 1.0 Mn, 1.5 to 3.0 Cu, 0.1 to 0.3 RE, less than or equal to 0.4 Al, less than or equal to 0.1 Sb, less than or equal to 0.12 P, less than or equal to 0.06 S, and remaining part of Fe. The seawater corrosion-resistant low alloy cast iron has the advantages of improving corrosion resistant performance due to joint action of the cast iron chromium, nickel, copper and other alloy elements, reducing nickel content and cost, and improving corrosion resistant performance of the seawater corrosion-resistant cast iron compared with the Ni-Cr alloy corrosion resistant cast iron.

Description

technical field [0001] The invention relates to a new corrosion-resistant alloy cast iron material, in particular to a corrosion-resistant alloy cast iron used in seawater engineering. Background technique [0002] Seawater hydraulic engineering, seawater desalination facilities, etc. need to use a large amount of seawater corrosion-resistant steel materials, such as gate sills, bottom sills, side rails, seawater pump shells, impellers, pipelines, etc. use a large amount of corrosion-resistant cast iron. At present, corrosion-resistant cast iron is an alloy cast iron mainly containing Ni and Cr. [0003] For example, Chinese Patent Publication No. CN1101683 discloses a seawater corrosion-resistant alloy cast iron, which is suitable for manufacturing water conservancy and hydropower engineering gates, gate slots and other equipment. It is characterized in that the weight percentage is composed of nickel 2.6-3, chromium 0.8-1, 0.7-0.9, silicon 1.8-2.1, carbon 2.8-3.2, copper ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/08C22C37/10
Inventor 孙宏飞王灿明渠智彦毕继鑫
Owner 山东省耐磨耐蚀材料工程技术研究中心
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