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Boron-containing high-silicon bainite wear-resistant corrosion-resistant alloy and manufacturing method thereof

A technology of corrosion-resistant alloy and manufacturing method, which is applied in the field of steel preparation, can solve problems such as insufficient toughness, poor wear resistance, and low initial hardness, and achieve improved seawater corrosion resistance, excellent strength-toughness coordination, and refined as-cast structure Effect

Active Publication Date: 2014-11-19
CHANGXING DETIAN ENG MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its initial hardness is very low and cannot be used as a wear-resistant material, especially under low or no impact load conditions; high-chromium cast iron has excellent wear resistance and good resistance to pitting and crevice corrosion, but Its toughness is too low, and it will break due to insufficient toughness under a large impact load, and there are problems such as welding repair difficulties
Moreover, due to the addition of a large number of alloy elements, the cost of use is high; the mooring chain steel has high strength, good toughness, good cold bending performance and welding performance, and has good seawater corrosion resistance, fatigue resistance, wear resistance and other characteristics , but the preparation process of this kind of steel is complicated, suitable for large-scale production, and the preparation cost is high; low alloy steel can greatly improve strength, hardness and toughness, and improve corrosion resistance through the addition of alloying elements and microstructure control, but at present The low-alloy steel used has the disadvantages of low hardness and poor wear resistance

Method used

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  • Boron-containing high-silicon bainite wear-resistant corrosion-resistant alloy and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A boron-containing high-silicon bainite wear-resistant and corrosion-resistant alloy, its chemical composition is 0.45%C, 2.15%Si, 0.92%Mn, 2.6%Cr, 0.35%Mo, 0.38%Ni, 0.41%Cu, 0.2%Ti , 0.1% B, 0.05% Ce, 0.08% Nb, 0.016% P, 0.011% S, and the rest is Fe. The specific preparation steps are as follows: first put the calculated and weighed returned materials and ordinary steel scrap into the induction furnace for smelting, and add calculated and weighed ferromolybdenum, nickel plate, ferrochrome, copper plate, ferroniobium and ferromanganese during the smelting process , ferrosilicon, after the furnace charge is melted, use a carburant to adjust the carbon content; then raise the melt temperature to 1600-1620°C and then insert aluminum for one-time deoxidation, the amount of aluminum added is 0.15-0.3% of the weight of the alloy melt; then Add ferro-titanium and ferro-boron. After the molten steel is melted and slag removed, aluminum is inserted for secondary deoxidation. The...

Embodiment 2

[0043] A boron-containing high-silicon bainite wear-resistant and corrosion-resistant alloy, its chemical composition is 0.42%C, 2.25%Si, 0.85%Mn, 2.32%Cr, 0.37%Mo, 0.31%Ni, 0.35%Cu, 0.22%Ti , 0.1% B, 0.055% Ce, 0.07% Nb, 0.014% P, 0.010% S, and the rest is Fe. The specific preparation steps are as follows: first put the calculated and weighed returned materials and ordinary steel scrap into the induction furnace for smelting, and add calculated and weighed ferromolybdenum, nickel plate, ferrochrome, copper plate, ferroniobium and ferromanganese during the smelting process , ferrosilicon, after the furnace charge is melted, use a carburant to adjust the carbon content; then raise the melt temperature to 1600-1620°C and then insert aluminum for one-time deoxidation, the amount of aluminum added is 0.15-0.3% of the weight of the alloy melt; then Add ferro-titanium and ferro-boron. After the molten steel is melted and slag removed, aluminum is inserted for secondary deoxidation. ...

Embodiment 3

[0045] A boron-containing high-silicon bainite wear-resistant and corrosion-resistant alloy, its chemical composition is 0.35%C, 2.12%Si, 0.95%Mn, 1.92%Cr, 0.34%Mo, 0.41%Ni, 0.32%Cu, 0.18%Ti , 0.1% B, 0.054% Ce, 0.06% Nb, 0.018% P, 0.014% S, and the rest is Fe. The specific preparation steps are as follows: first put the calculated and weighed returned materials and ordinary steel scrap into the induction furnace for smelting, and add calculated and weighed ferromolybdenum, nickel plate, ferrochrome, copper plate, ferroniobium and ferromanganese during the smelting process , ferrosilicon, after the furnace charge is melted, use a carburant to adjust the carbon content; then raise the melt temperature to 1600-1620°C and then insert aluminum for one-time deoxidation, the amount of aluminum added is 0.15-0.3% of the weight of the alloy melt; then Add ferro-titanium and ferro-boron. After the molten steel is melted and slag removed, aluminum is inserted for secondary deoxidation. ...

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Abstract

The invention relates to a boron-containing high-silicon bainite wear-resistant corrosion-resistant alloy and a manufacturing method thereof. The alloy comprises the following chemical components in percentage by weight: 0.3-0.6% of C, 1.6-2.6% of Si, 0.6-1.0% of Mn, 0.6-4.0% of Cr, 0.3-0.5% of Mo, 0.3-0.5% of Ni, 0.3-0.5% of Cu, 0.1-0.3% of Ti, 0.05-0.1% of B, 0.05-0.15% of Ce, 0.05-0.15% of Nb, less than 0.04% of P, less than 0.04% of S and the balance of Fe. The manufacturing method comprises the following steps: carrying out electric-furnace smelting, carrying out secondary aluminum insertion deoxidization, putting on the bottom of a casting ladle to form a casting, austenizing the casting at 850-950 DEG C, keeping the temperature for some time, putting in a salt bath at 200-260 DEG C to carry out primary isothermal quenching, keeping the temperature for 5-10 minutes, carrying out secondary isothermal quenching in a salt bath at 260-400 DEG C, keeping the temperature for 0.5-4 hours, and cooling in air to obtain the wear-resistant corrosion-resistant alloy of which the austenite-bainite base is distributed with boride. The alloy is low in preparation cost and suitable for marine silt erosion and corrosion environments, has favorable comprehensive properties of toughness, wear resistance and corrosion resistance, and can be used for dredger cutter teeth, slurry pipelines, centrifugal-pump impellers, blades and the like.

Description

Technical field: [0001] The invention belongs to the technical field of steel preparation, and in particular relates to a boron-containing high-silicon bainite wear-resistant and corrosion-resistant alloy and a manufacturing method thereof. Background technique: [0002] Ocean engineering is one of the important aspects of the national strategic development of ocean affairs. With the development of ocean resources, ocean engineering platforms, large-scale ocean engineering auxiliary ships and related industries have developed rapidly. Wear-resistant materials for marine engineering is a direction of great research and development value. Wear-resistant components of construction machinery working in seawater environment, such as dredger cutter teeth, mud conveying pipes, centrifugal pump impellers, blades, etc. Shear force erosion, sediment wear and seawater erosion, corrosion and wear are quite serious, requiring sufficient strength and toughness and good wear and corrosion...

Claims

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Application Information

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IPC IPC(8): C22C38/50C22C33/06C21D6/00C21D1/20
Inventor 孙峰范静邬海斌
Owner CHANGXING DETIAN ENG MACHINERY
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