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Scandium-zirconium-strontium composite micro-alloyed nickel-aluminum bronze and method for manufacturing same

A nickel-aluminum bronze and micro-alloying technology, which is applied in the field of scandium, zirconium and strontium composite micro-alloyed nickel-aluminum bronze and its preparation, new nickel-aluminum bronze and its preparation, can solve problems such as constraints, and achieve compact structure, The effect of low friction coefficient and high hardness

Active Publication Date: 2014-11-05
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] So far, my country has not yet had a scandium, zirconium and strontium composite microalloyed nickel-aluminum bronze with independent intellectual property rights available, which to a certain extent restricts the use of propellers for ships at sea, seawater pumps, offshore oil platforms, offshore Rapid development of water piping systems, mechanical molds, and mechanical parts such as bearings, bushings, and turbines that work at high speed, high pressure, and high temperature

Method used

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  • Scandium-zirconium-strontium composite micro-alloyed nickel-aluminum bronze and method for manufacturing same
  • Scandium-zirconium-strontium composite micro-alloyed nickel-aluminum bronze and method for manufacturing same

Examples

Experimental program
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Effect test

Embodiment 1

[0028] like figure 1 shown.

[0029] A kind of scandium, zirconium and strontium composite microalloyed nickel aluminum bronze is prepared by the following method

[0030] Take 7.2268kg as an example.

[0031] First, 7.1 kg of commercially available or prefabricated nickel aluminum bronze (copper (Cu) 77~82%, manganese (Mn) 0.5~4.0%, aluminum (Al) 7.0~11.0%, iron (Fe) 2.0~6.0%, Nickel (Ni) 3.0~6.0%, zinc (Zn) ￡1.0%, and the rest is impurity elements) after melting, add 35.9g Al-Sr master alloy (89.85%Al, 9.89%Sr (the content of strontium can be 8.901%~ 10.879%, the same below), 0.16%Fe, 0.10%Si) (the loss rate of Sr is about 40%), 86.4g Al-Zr master alloy (95.69%Al, 4.11%Zr (the content of zirconium can be in 3.699%~4.521%, the same below), 0.20%Fe, 0.10%Si ) (the loss rate of Zr is about 8%), 4.5g pure Sc (the loss rate of Sc is about 8%), the said The master alloy can be purchased directly from the market, or can be prepared by yourself by conventional methods. During th...

Embodiment 2

[0035]A kind of scandium, zirconium and strontium composite microalloyed nickel aluminum bronze is prepared by the following method

[0036] Take 7.2268kg as an example.

[0037] First, after melting 7.1kg nickel-aluminum bronze, add 30.9g Al-Sr master alloy (89.85%Al, 9.89%Sr, 0.16%Fe, 0.10%Si) (the loss rate of Sr is about 40%), 91.9g Al- Zr master alloy (95.69%Al, 4.11%Zr, 0.20%Fe, 0.10%Si ) (the loss rate of Zr is about 8%), 4g pure Sc (the loss rate of Sc is about 8%), the said master alloy It can be purchased directly from the market, or it can be prepared by yourself by conventional methods. During the melting process, wait for the former master alloy to melt before adding the latter master alloy or metal; Refining with high-purity nitrogen for 3 minutes; finally, pour it into a ladle, let it stand for 1 to 5 minutes, remove the slag and cast it into an ingot; that is, a nickel-aluminum bronze composite microalloyed with scandium, zirconium and strontium is obtained. ...

Embodiment 3

[0040] Such as figure 1 shown.

[0041] A kind of scandium, zirconium and strontium composite microalloyed nickel aluminum bronze is prepared by the following method

[0042] Take 7.2268kg as an example.

[0043] First, 7.157 kg of commercially available or prefabricated nickel aluminum bronze (copper (Cu) 77~82%, manganese (Mn) 0.5~4.0%, aluminum (Al) 7.0~11.0%, iron (Fe) 2.0~6.0%, Nickel (Ni) 3.0~6.0%, zinc (Zn) ￡1.0%, the rest is impurity elements) after melting, add 14.61g Al-Sr master alloy (89.85%Al, 9.89%Sr, 0.16%Fe, 0.10%Si) (Sr loss rate is about 40%), 53.51g Al-Zr master alloy (95.69%Al, 4.11%Zr, 0.20%Fe, 0.10%Si ) (Zr loss rate is about 8%), 1.96g pure Sc (the loss rate of Sc is about 8%), described master alloy can be purchased directly from the market, also can adopt conventional method self-preparation, in the melting process, wait for the former master alloy to melt and then add the latter master alloy or metal ; After all the melting, add slag agent (to rem...

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Abstract

The invention discloses scandium-zirconium-strontium composite micro-alloyed nickel-aluminum bronze and a method for manufacturing the same. The scandium-zirconium-strontium composite micro-alloyed nickel-aluminum bronze is characterized by comprising scandium (Sc) (0.025-0.078%), zirconium (Zr) (0.028-0.082%), strontium (Sr) (0.012-0.057%) and the balance nickel-aluminum bronze. The method for manufacturing the scandium-zirconium-strontium composite micro-alloyed nickel-aluminum bronze includes firstly, melting the nickel-aluminum bronze, and then sequentially adding Al-Sr master alloy, Al-Zr master alloy and the pure Sc into the melted nickel-aluminum bronze to obtain a mixture; secondly, adding slag removing agents into the mixture and feeding high-purity nitrogen to refine the mixture; and thirdly, pouring the refined mixture into a casting ladle, allowing the mixture to stand, then removing slag and casting the mixture into ingots. Compared with conventional nickel-aluminum bronze, the scandium-zirconium-strontium composite micro-alloyed nickel-aluminum bronze is fine and compact in structure, the hardness of the scandium-zirconium-strontium composite micro-alloyed nickel-aluminum bronze is improved by 13.4%, the uniform corrosion rate is reduced by 5.2% when the scandium-zirconium-strontium composite micro-alloyed nickel-aluminum bronze is placed in 3.5% NaCl solution, the friction coefficient is obviously reduced, and the scandium-zirconium-strontium composite micro-alloyed nickel-aluminum bronze has wide application prospects in fields of propellers of marine ships, seawater pumps, offshore oil platforms, seawater pipeline systems and mechanical molds, fields of bearings, bushings and turbines which work under conditions of high speed, high pressure and high temperature, and the like.

Description

technical field [0001] The invention relates to an aluminum bronze alloy and a preparation method thereof, in particular to a novel nickel-aluminum bronze and a preparation method thereof, in particular to a scandium, zirconium and strontium composite microalloyed nickel-aluminum bronze and a preparation method thereof. Background technique [0002] Nickel-aluminum bronze has excellent tribological properties, high-speed seawater erosion resistance, corrosion resistance and good formability (melting and casting properties, plastic formability, weldability), and is widely used in machinery, ships, offshore oil platforms, etc. In the field, it is the main material for the manufacture of marine ship propellers, seawater pumps, offshore oil platforms, seawater piping systems, mechanical molds, bearings, bushings, turbines and other mechanical parts that work under high speed, high pressure and high temperature. With the increase in size and depth of ocean-going ships and offshor...

Claims

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Application Information

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IPC IPC(8): C22C9/01C22C1/03C22C1/06
Inventor 许晓静王宏宇陈树东潘励楚满军何峰林何峰明丁志红
Owner JIANGSU UNIV
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