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Corrosion-resistant material for large propeller blade and preparation method

A corrosion-resistant material and technology for propellers, which are applied in the field of corrosion-resistant materials and preparation for large-scale propeller blades, can solve problems such as the strength and corrosion resistance of copper alloys, the corrosion resistance of propellers, and the inability to replace copper alloys. , to achieve the effect of improving corrosion resistance and prolonging service life

Inactive Publication Date: 2021-02-19
ZHENJIANG TONGZHOU PROPELLER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In ship design, most propellers are made of copper alloy, which has the advantages of good corrosion resistance and relatively simple casting. However, due to serious pollution in recent years, the corrosion resistance of copper alloy propellers has also begun to have problems. Some people also use iron alloys. to make propellers, but for propellers, iron alloys are not as strong and corrosive as copper alloys, so they cannot be used as a substitute for copper alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] The corrosion-resistant material for large-scale propeller blades according to the present invention, the chemical composition contained in the material and its mass percentage are as follows: copper is used as the main raw material, and Fe iron: 3.5% to 10.5%; Sr strontium: 1.5% to 1.7% ;Si silicon: 0.01%~1.2%; B boron: 0.003%~0.048%; Mn manganese: 2.3%~4.1%; Ni nickel: 3.5%~7.5%; Mo molybdenum: 0.3%~0.9%; %~0.15%; Zn Zinc: 0~1.5%.

[0076] On this basis, a method for preparing a corrosion-resistant material for large propeller blades is also provided, comprising the following steps:

[0077] (1) Preparation of materials: weigh each component material required, the proportion is qualified, and add according to the weight ratio;

[0078] (2) First add 3.5-10.5 parts of iron, 0.3-0.9 parts of molybdenum, 0.01-1.2 parts of silicon and 0.003-0.048 parts of boron, heat to 2200-2400 degrees Celsius, and fully stir to obtain a mixture;

[0079] When the temperature reaches ...

Embodiment 2

[0085]Corrosion-resistant materials for large propeller blades. The chemical composition and mass percentage of the material are as follows. Copper is the main raw material. Among other materials, the weight ratio of Si and B in the percentage content is: (0.02-0.4): (0.005 -0.04).

[0086] Further, the Si / B ratio of the elements Si and B by weight has a minimum value of 0.5 and a maximum value of 10, which can ensure the improvement of alloy performance.

Embodiment 3

[0088] A corrosion-resistant material for large propeller blades, the components of which include by weight percentage: Fe iron: 5.2% to 10.1%; Sr strontium: 1.3% to 1.65%; Si silicon: 0.26% to 0.94%; B boron: 0.014% %~0.026%; Mn manganese: 2.35%~3.63%; Ni nickel: 4.8%~6.6%; Mo molybdenum: 0.44%~0.79%; P phosphorus: 0.008%~0.091%; Zn zinc: 0.83%~1.25%; The remainder is Cu and unavoidable impurities.

[0089] On this basis, a method for preparing a corrosion-resistant material for large propeller blades is also provided, comprising the following steps:

[0090] (1) Preparation of materials: weigh each component material required, the proportion is qualified, and add according to the weight ratio;

[0091] (2) First add Fe: 5.2% to 10.1%, Mo: 0.44% to 0.79%, silicon 0.26% to 0.94% and boron 0.014% to 0.026%, heat to 2200-2400 degrees Celsius, and fully stir to obtain mixture;

[0092] When the temperature reaches between 650°C and 950°C, perform at least one thermoforming ope...

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PUM

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Abstract

The invention discloses a corrosion-resistant material for a large propeller blade. The material is prepared from the chemical components including, by mass, 3.5%-10.5% of Fe, 1.5%-1.7% of Sr, 0.01%-1.2% of Si, 0.003% to 0.048% of B, 2.3%-4.1% of Mn, 3.5%-7.5% of Ni, 0.3%-0.9% of Mo, 0.003% to 0.15% of P, 0-1.5% of Zn, and the balance Cu and inevitable impurities. According to the material, Si andB are added to the alloy, and a certain proportion is limited, so that the corrosion resistance of the alloy is improved; and the service life of a marine propeller is prolonged.

Description

technical field [0001] The invention relates to the technical field of propeller manufacturing, in particular to a corrosion-resistant material for large propeller blades and a preparation method. Background technique [0002] In ship design, most propellers are made of copper alloy, which has the advantages of good corrosion resistance and relatively simple casting. However, due to serious pollution in recent years, the corrosion resistance of copper alloy propellers has also begun to have problems. Some people also use iron alloys. To make propellers, but the strength and corrosion resistance of iron alloys are not as good as copper alloys for propellers, so they cannot be used as a substitute for copper alloys. Contents of the invention [0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a corrosion-resistant material for large propeller blades. The material has high strength, high hardness, sufficien...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C9/06C22C1/02
CPCC22C1/02C22C9/00C22C9/06
Inventor 王湘来袁建军梅斌贤侯进宝张晨卢斌
Owner ZHENJIANG TONGZHOU PROPELLER