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Zirconium micro-alloyed nickel-aluminum bronze

A nickel-aluminum bronze and micro-alloying technology is applied to nickel-aluminum bronze alloy and its preparation, zirconium microalloyed nickel-aluminum bronze and its preparation field, can solve problems such as restricting high-speed development, and achieve the reduction of friction coefficient and the reduction of friction coefficient. Low, good corrosion resistance

Active Publication Date: 2015-06-17
ZHENJIANG JINYE PROPELLER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there is no zirconium microalloyed nickel-aluminum bronze with independent intellectual property rights available in our country, which to a certain extent restricts the use of propellers, seawater pumps, offshore oil platforms, seawater pipeline systems, and molds in my country's offshore ships. And the rapid development of bearings, bushings, turbines and other mechanical parts working at high speed, high pressure and high temperature

Method used

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  • Zirconium micro-alloyed nickel-aluminum bronze
  • Zirconium micro-alloyed nickel-aluminum bronze

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 shown.

[0023] A zirconium microalloyed nickel-aluminum bronze, the preparation method of which is:

[0024] Take 8.9577kg as an example.

[0025] First, 8.85kg of self-made (see comparative example 1) or commercially available nickel-aluminum bronze (composition: 79.77Cu, 1.1Mn, 8.84Al, 5.05Fe, 4.54Ni, 0.58Zn, the numbers before all element symbols in the examples represent Mass percentage, the same below) After melting, add 107.7g Al-Zr master alloy (95.69%Al, 4.11%Zr (the content of zirconium is preferably 3.699~4.521%), 0.20%Fe, 0.10%Si ) (the loss rate of Zr about 8%), the master alloy can be purchased directly from the market, or can be self-prepared by conventional methods; after it is completely melted, add a slag remover (to remove impurities), and then pass into high-purity nitrogen for refining for 3 minutes; finally , poured into the ladle, and after standing for 1-5 minutes, the slag was removed and cast into an ingot; that is, a zircon...

Embodiment 2

[0029] A zirconium microalloyed nickel-aluminum bronze, the preparation method of which is:

[0030] Take 8.9577kg as an example.

[0031] First, melt 8.855kg of nickel-aluminum bronze (composition: 78.34Cu, 1.30Mn, 9.94Al, 5.52Fe, 4.30Ni, 0.43Zn, the numbers before all element symbols in the examples represent mass percentages, the same below) and add 102.7 g Al-Zr master alloy (95.69%Al, 4.11%Zr, 0.20%Fe, 0.10%Si) (the loss rate of Zr is about 8%), described master alloy can be purchased directly from the market, also can adopt conventional The method is self-prepared; after it is completely melted, add a slag remover (to remove impurities), and then pass high-purity nitrogen to refine for 3 minutes; finally, pour it into a ladle, keep it for 1-5 minutes, remove the slag and cast it into an ingot; that is A zirconium microalloyed nickel aluminum bronze is obtained.

[0032] The nickel-aluminum bronze after microalloying of zirconium in this embodiment is actually measured ...

Embodiment 3

[0034] A zirconium microalloyed nickel-aluminum bronze, the preparation method of which is:

[0035] Take 8.9577kg as an example.

[0036] First, 8.887kg of self-made (see comparative example 1) or commercially available nickel-aluminum bronze (composition: 79.77Cu, 1.1Mn, 8.84Al, 5.05Fe, 4.54Ni, 0.58Zn, the numbers before all element symbols in the examples represent Mass percentage, the same below) After melting, add 71.07g Al-Zr master alloy (95.69%Al, 4.11%Zr (the content of zirconium is preferably 3.699~4.521%), 0.20%Fe, 0.10%Si ) (loss rate of Zr about 8%), the master alloy can be purchased directly from the market, or can be self-prepared by conventional methods; after it is completely melted, add a slag remover (to remove impurities), and then pass into high-purity nitrogen for refining for 3 minutes; finally , poured into the ladle, and after standing for 1-5 minutes, the slag was removed and cast into an ingot; that is, a zirconium microalloyed nickel-aluminum bronz...

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Abstract

The invention relates to zirconium micro-alloyed nickel-aluminum bronze and a preparation method thereof. The zirconium micro-alloyed nickel-aluminum bronze is characterized in that the alloy mainly comprises nickel-aluminum bronze and zirconium (Zr) with mass percentage of 0.03 to 0.1%. The preparation process flow of alloy comprises the following steps of: firstly, after melting the nickel-aluminum bronze, and then adding Al-Zr intermediate alloy; after completely melting, adding a deslagging agent, and then introducing a high-purity nitrogen gas to refine for 3min; and finally, pouring into a ladle, keeping stand and keeping the temperature for 1-5min, deslagging and casting into ingots. Compared with the conventional nickel-aluminum bronze, the alloy provided by the invention has a fine microstructure, the hardness is increased by 8.1%, the uniform corrosion rate in 3.5% NaCl solution is reduced to 5.3%, and the coefficient of friction is obviously reduced; and the alloy has wide application prospects in fields such as marine ship propellers, seawater pumps, marine oil platforms, seawater piping systems, mechanical molds and bearings, bushings and turbines which work at high speed, high pressure and high temperature.

Description

technical field [0001] The invention relates to an aluminum bronze alloy and a preparation method thereof, in particular to a nickel-aluminum bronze alloy and a preparation method thereof, in particular to a zirconium microalloyed nickel-aluminum bronze and a preparation method thereof. Background technique [0002] Nickel-aluminum bronze has excellent resistance to high-speed seawater erosion, corrosion resistance and tribological properties. Compared with super duplex stainless steel, it has good formability, low raw material prices and low manufacturing costs. However, when it is used to manufacture large parts, the casting structure is coarse due to the slow cooling rate of the casting, which seriously inhibits the improvement of the performance of the casting. [0003] As we all know, alloying and microalloying are effective means to improve the microstructure and properties of copper alloys. From the composition of nickel aluminum bronze (copper (Cu) 77~82%, manganese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/01C22C1/03C22C1/06
Inventor 何峰林何峰明丁志红许晓静潘励陈树东王宏宇楚满军
Owner ZHENJIANG JINYE PROPELLER
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