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Low-alloy abrasion-proof and corrosion resistant steel and method for producing the same

A low-alloy, corrosion-resistant steel technology, applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve problems such as welding repair difficulties, insufficient comprehensive performance of wear resistance and corrosion resistance, insufficient strength and toughness, etc., to achieve good corrosion resistance and wear performance, The effect of superior corrosion resistance

Inactive Publication Date: 2009-05-06
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem: The present invention provides a low-alloy wear-resistant and corrosion-resistant steel, which solves the common problems of insufficient strength and toughness, insufficient wear-resistant and corrosion-resistant comprehensive performance, and difficulty in welding and repairing in existing marine metal materials.

Method used

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  • Low-alloy abrasion-proof and corrosion resistant steel and method for producing the same
  • Low-alloy abrasion-proof and corrosion resistant steel and method for producing the same
  • Low-alloy abrasion-proof and corrosion resistant steel and method for producing the same

Examples

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Effect test

Embodiment 1

[0024] A low-alloy wear-resistant and corrosion-resistant steel, the microstructure of the steel is carbide-free bainite, and the chemical composition of the steel is:

[0025] C: 0.12%; Si: 1.2%; Mn: 0.8%; Cr: 1.0%; Mo: 0.3%; Ni: 0.4%; Al: 0.6%; rare earth: 0.02%; Nb: 0.08%;

[0026] The method for preparing the above-mentioned low-alloy wear-resistant and corrosion-resistant steel comprises the following steps:

[0027] a. Electric furnace smelting: Use a high-power electric arc furnace to melt the furnace charge. When the carbon steel new material is smelted to 20%, add ferromolybdenum, nickel plate, ferro-niobium and low-carbon chromium. When the smelting reaches 80%, add part of the aluminum material. After it is completely melted, Sampling and analysis were made to make up the amount of aluminum, and ferromanganese (1620°C), ferrosilicon (1630°C), and rare earth ferrosilicon (1650°C) were added in sequence, respectively covered with slag removal covering agent, and slag ...

Embodiment 2

[0032] A low-alloy wear-resistant and corrosion-resistant steel, the microstructure of the steel is carbide-free bainite, and the chemical composition of the steel is:

[0033] C0.16%; Si1.6%; Mn0.8%; Cr1.6%; Mo0.4%; Ni0.4%; Al0.6%; rare earth 0.05%; Nb0.04%; the balance is Fe.

[0034] The method for preparing the above-mentioned low-alloy wear-resistant and corrosion-resistant steel comprises the following steps:

[0035] a. Electric furnace smelting: Use a high-power electric arc furnace to melt the furnace charge. When the carbon steel new material is smelted to 20%, add ferromolybdenum, nickel plate, ferro-niobium and low-carbon chromium. When the smelting reaches 80%, add part of the aluminum material. After it is completely melted, Sampling and analysis were made to make up the amount of aluminum, and ferromanganese (1620°C), ferrosilicon (1630°C), and rare earth ferrosilicon (1650°C) were added in sequence, respectively covered with slag removal covering agent, and slag ...

Embodiment 3

[0040] A low-alloy wear-resistant and corrosion-resistant steel, the microstructure of the steel is carbide-free bainite, and the chemical composition of the steel is:

[0041] C 0.15%; Si 1.6%; Mn 1.0%; Cr 1.0%; Mo 0.4%; Ni 0.3%; Al 1.0%; rare earth: 0.03%; Nb: 0.05%;

[0042] The method for preparing the above-mentioned low-alloy wear-resistant and corrosion-resistant steel comprises the following steps:

[0043] a. Electric furnace smelting: Use a high-power electric arc furnace to melt the furnace charge. When the carbon steel new material is smelted to 20%, add ferromolybdenum, nickel plate, ferro-niobium and low-carbon chromium. When the smelting reaches 80%, add part of the aluminum material. After it is completely melted, Sampling and analysis were made to make up the amount of aluminum, and ferromanganese (1620°C), ferrosilicon (1630°C), and rare earth ferrosilicon (1650°C) were added in sequence, respectively covered with slag removal covering agent, and slag was rem...

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Abstract

The invention relates to low alloy wearing resistance corrosion resistance steel which is suitably used in the ocean mud-sand wearing and corrosive environment, which is produced by the following steps: Mn-Si-Cr-Mo system non-carbide bainite alloy steel is taken as research basis, the carbon content and other alloy element contents are properly adjusted, elements of Al, Nb and rare earth contributing to improving the corrosion resistance of the alloy steel are added for modification, and the Mn-Si-Cr-Mo-Al system non-carbide bainite steel is formed by the progression quenching heat treatment process, so that the low alloy wearing resistance corrosion resistance steel is obtained. The steel has good obdurability, wearing resistant and corrosion resistant comprehensive performance and welding repair performances, and can be used to solve the problem of repairing worn blades of a centrifugal pump of a ship, and can also be applied to other ocean wearing resistance welding parts.

Description

1. Technical field [0001] The invention relates to a low-alloy steel and a manufacturing method thereof, in particular to a Mn-Si-Cr-Mo-Al low-alloy wear-resistant and corrosion-resistant steel and a manufacturing method thereof. 2. Background technology [0002] Ocean engineering is one of the important aspects of modern industrial development. The seawater environment is complex. The bucket teeth of dredgers and centrifugal pump blades that have been working in seawater for a long time are affected by the shear force formed by the sediment and the surface of the workpiece driven by high-speed water flow, and corrosion The wear is pretty bad. At present, the marine metal materials are mainly carbon steel, low alloy steel and high chromium cast iron. These materials generally have problems such as insufficient strength and toughness, insufficient comprehensive performance of wear resistance and corrosion resistance, or difficulty in welding and repairing. [0003] Due to t...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C38/44C21C5/52C21D1/58
CPCY02P10/20
Inventor 马爱斌王秋月江静华
Owner HOHAI UNIV
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