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Pouring and polishing process for propeller and copper alloy formula for propeller

A propeller, copper alloy technology, applied in propellers, manufacturing tools, metal processing equipment and other directions, can solve the problems of poor anti-cavitation erosion performance of propellers, low mechanical strength of propellers, and easy to be eroded by seawater, etc. Performance, the overall connection strength will not be damaged, the effect of improving the overall mechanical properties

Active Publication Date: 2016-06-22
TAIZHOU JIAOJIANG YONGGU SHIP PROPELLER FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of existing propellers are: propellers made of copper alloy have poor cavitation erosion resistance; propellers made of cast iron have low mechanical strength, are brittle and easy to break, and are easily corroded by seawater; The propellers are uniformly deformed during the casting process; at the same time, cast steel is more susceptible to seawater erosion than other metals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A copper alloy for manufacturing propellers, the copper-aluminum alloy is composed of the following components in weight ratio: 7% aluminum, 8% manganese, 4% iron, 1% nickel, 1% zinc, and 0.1% titanium , chromium is 0.1%, cobalt is 0.010%, and the rest is copper.

[0041] A propeller pouring and grinding process, comprising the following steps:

[0042] The first step: copper alloy melting

[0043] S101. Rough smelting: put the copper alloy described in the above formula into the melting furnace for heating and melting; at the same time, place a nitrogen blowing device on the melting furnace to blow nitrogen at low pressure and small flow rate;

[0044] S102. Refining: After rough refining, add ice crystal powder to the metal solution, the amount of ice crystal powder is 0.1% of the alloy mass; heat the furnace to 1000 degrees, and then add copper alloy refining slag removal agent with a mass fraction of 0.4% ;

[0045] Step Two: Pouring

[0046] S201. Inject the re...

Embodiment 2

[0099] Embodiment 2 differs from Embodiment 1 in that it is a copper alloy for manufacturing propellers, and the copper-aluminum alloy is composed of the following components in weight ratio: 8% of aluminum, 15% of manganese, 5% of iron, and 5% of nickel. 2%, 3% zinc, 0.2% titanium, 0.1% chromium, 0.02% cobalt, and the rest is copper.

[0100] The propeller made of the manufacturing materials produced in this case has been tested and has the following properties: the yield point of the propeller is 320N / mm2, the tensile strength is ≥660N / mm2, and the elongation is 18.5%, which is higher than the mechanical properties of the existing nickel-aluminum-bronze propeller . The performance index of the existing nickel-aluminum-bronze propeller: yield point 245N / mm2, tensile strength ≥ 590N / mm2, elongation 16% performance standard.

Embodiment 3

[0102] Embodiment 3 differs from Embodiment 1 in that it is a copper alloy for manufacturing propellers, and the copper-aluminum alloy is composed of the following components in weight ratio: 10% of aluminum, 20% of manganese, 6% of iron, and 6% of nickel. 3%, 6% zinc, 0.3% titanium, 0.3% chromium, 0.025% cobalt, and the rest is copper.

[0103] The propeller made of the manufacturing materials produced in this case has been tested and has the following properties: the yield point of the propeller is 300N / mm2, the tensile strength is ≥680N / mm2, and the elongation is 20.5%, which is higher than the mechanical properties of the existing nickel-aluminum-bronze propeller . The performance index of the existing nickel-aluminum-bronze propeller: yield point 245N / mm2, tensile strength ≥ 590N / mm2, elongation 16% performance standard.

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Abstract

The invention discloses a pouring and polishing process for a propeller and a copper alloy formula for the propeller. A copper-aluminum alloy consists of the following components in percentage by weight: 7-10% of aluminum, 8-20% of manganese, 4-6% of iron, 1-3% of nickel, 1-6% of zinc, 0.1-0.3% of titanium, 0.1-0.3% of chromium, 0.010-0.025% of cobalt and the balance of copper. On the basis of the copper alloy, microelements of titanium, chromium and cobalt are added, so that the toughness, cavitation erosion resistance and seawater corrosion resistance of the propeller are integrally improved, and the service life of the propeller is prolonged. A propeller workpiece is polished into a finished product through the working procedures of primary milling, detecting, polishing, blade surface coarse grinding, milling, edging and finishing; the finished product is high in smoothness and good in levelling effect; a stress structure cannot be damaged; water resistance during use is small; and the service life is long.

Description

technical field [0001] The invention relates to the technical field of propeller manufacturing, in particular to a copper alloy formulation of a propeller and a pouring and grinding process of the propeller. Background technique [0002] The propeller is one of the main power equipment of the hull. It converts the kinetic energy of the hull into the driving force of the ship. Therefore, the manufacturing quality and process of the propeller are very important. The main manufacturing materials of the propeller are usually copper alloy, cast iron and cast iron. Mainly steel. [0003] The disadvantages of existing propellers are: propellers made of copper alloy have poor cavitation erosion resistance; propellers made of cast iron have low mechanical strength, are brittle and easy to break, and are easily corroded by seawater; The propellers are uniformly deformed during the casting process; at the same time, cast steel is more susceptible to seawater erosion than other metals....

Claims

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Application Information

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IPC IPC(8): B23P15/00C22C9/01C22C9/05B22D41/50
CPCB22D41/50B23P15/00B64C11/00C22C9/01C22C9/05
Inventor 王以军
Owner TAIZHOU JIAOJIANG YONGGU SHIP PROPELLER FACTORY
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