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Scandium, zirconium and strontium (Sc-Zr-Sr) compounded micro-alloyed high manganic aluminum bronze and preparation method thereof

A high-manganese-aluminum bronze and micro-alloying technology, which is applied in the field of new-type high-manganese-aluminum bronze and its preparation, scandium, zirconium and strontium composite micro-alloyed high-manganese-aluminum bronze and its preparation, can solve the problem of restricting the rapid development of industrial equipment and other problems, to achieve the effect of fine grain, high hardness and good corrosion resistance

Active Publication Date: 2014-11-05
ZHENJIANG JINYE PROPELLER
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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 high-manganese-aluminum bronze available for use in China, which to a certain extent restricts the use of large-scale ship propellers, seawater pumps, valves, and seawater desalination in my country. The rapid development of industrial equipment such as equipment

Method used

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  • Scandium, zirconium and strontium (Sc-Zr-Sr) compounded micro-alloyed high manganic aluminum bronze and preparation method thereof
  • Scandium, zirconium and strontium (Sc-Zr-Sr) compounded micro-alloyed high manganic aluminum bronze and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 shown.

[0030] A scandium, zirconium and strontium composite microalloyed high manganese aluminum bronze, prepared by the following method:

[0031] Take 8.09kg as an example.

[0032] First, 7.95 kg of commercially available or self-made high manganese aluminum bronze (copper (Cu) 70~80%, manganese (Mn) 8.0~20.0%, aluminum (Al) 6.5~9.0%, iron (Fe) 2.0~5.0% , Nickel (Ni) 1.5~3.0%, Zinc (Zn) ￡6.0%, the rest is impurity elements) After melting, add 40.19g Al-Sr master alloy (89.85%Al, 9.89%Sr (can be 8.901%~10.879% floating between, the same below), 0.16%Fe, 0.10%Si) (the loss rate of Sr is about 40%), after the Al-Sr master alloy is melted, add 96.81g Al-Zr master alloy (95.69%Al, 4.11 %Zr (can float between 3.699% ~ 4.521, the same below), 0.20%Fe, 0.10%Si ) (the loss rate of Zr is about 8%) for melting, after the Al-Zr master alloy is melted, add 3g of pure Sc (the loss rate of Sc is about 8%), the master alloy and pure Sc can be purchased directl...

Embodiment 2

[0036] A scandium, zirconium and strontium composite microalloyed high manganese aluminum bronze, prepared by the following method:

[0037]Take 8.09kg as an example.

[0038] First, after melting 7.955kg high manganese aluminum bronze, add 35.19g Al-Sr master alloy (89.85%Al, 9.89%Sr, 0.16%Fe, 0.10%Si) (the loss rate of Sr is about 40%), 96.81g Al - Zr master alloy (95.69%Al, 4.11%Zr, 0.20%Fe, 0.10%Si ) (the loss rate of Zr is about 8%), 3g pure Sc (the loss rate of Sc is about 8%), the said intermediate The alloy can be purchased directly from the market, or can be prepared by yourself by conventional methods. During the melting process, the former master alloy is melted and then the latter master alloy or metal is added; Then pass through high-purity nitrogen for refining for 3 minutes; finally, pour it into a ladle, let it stand for 1-5 minutes, remove the slag and cast it into an ingot; that is, high manganese-aluminum bronze with scandium, zirconium and strontium compos...

Embodiment 3

[0042] A scandium, zirconium and strontium composite microalloyed high manganese aluminum bronze, prepared by the following method:

[0043] Take 8.09kg as an example.

[0044] First, 7.95 kg of commercially available or self-made high manganese aluminum bronze (copper (Cu) 70~80%, manganese (Mn) 8.0~20.0%, aluminum (Al) 6.5~9.0%, iron (Fe) 2.0~5.0% , nickel (Ni) 1.5~3.0%, zinc (Zn) ￡6.0%, the rest is impurity elements) after melting, add 40.19g Al-Sr master alloy (89.85%Al, 9.89%Sr, 0.16%Fe, 0.10% Si) (the loss rate of Sr is about 40%), after the Al-Sr master alloy is melted, add 96.81g Al-Zr master alloy (95.69%Al, 4.11%Zr, 0.20%Fe, 0.10%Si ) (of Zr Loss rate is about 8%) to melt, after the Al-Zr master alloy is melted, add 1.32 pure Sc (the loss rate of Sc is about 8%), described master alloy and pure Sc can be purchased directly from the market, also can It can be self-prepared by conventional methods. During the melting process, the former master alloy is melted and the...

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Abstract

The invention discloses Sc-Zr-Sr compounded micro-alloyed high manganic aluminum bronze, which is characterized by mainly comprising the following components in percentage by mass: 0.015-0.058% of Sc, 0.028-0.074% of Zr, 0.012-0.057% of Sr and the balance of high manganic aluminum bronze, wherein the sum of mass percentages of all the components is 100%. The preparation process of the alloy comprises the following steps of: firstly, melting the high manganic aluminum bronze, and sequentially adding an Al-Sr intermediate alloy, an Al-Zr intermediate alloy and pure Sc; then, adding a slag cleaning agent for removing impurities after completely melting the added materials, and feeding high-purity nitrogen for refinement; and finally, pouring into a casting ladle, removing slag after standing, and casting to form ingots. Compared with the conventional high manganic aluminum bronze, the Sc-Zr-Sr compounded micro-alloyed high manganic aluminum bronze is fine and compact in structure, has the hardness which is increased by 46.3%, the uniform corrosion rate in a 3.5% NaCl solution is reduced by 8%, and the friction coefficient is reduced significantly. The Sc-Zr-Sr compounded micro-alloyed high manganic aluminum bronze effectively makes up the defect of insufficient performance of the existing high manganic aluminum bronze on the market, and can meet the requirements on high-performance high manganic aluminum bronze of the rapid development in fields including propellers, seawater pumps, valves, seawater desalination equipment and the like for large ships in our country.

Description

technical field [0001] The present invention relates to an aluminum bronze alloy and its preparation method, especially a novel high manganese aluminum bronze and its preparation method, specifically a scandium, zirconium and strontium composite microalloyed high manganese aluminum bronze and its preparation method. Background technique [0002] High-manganese aluminum bronze has excellent resistance to high-speed seawater erosion and seawater corrosion. It is one of the main materials for manufacturing large-scale offshore ship propellers, seawater pumps, offshore oil platforms, and seawater piping systems. With the increase in size and deep water of ocean-going ships and offshore oil platforms, as well as the extension of the service period and the further harshness of the service environment, there is an urgent need for high-manganese-aluminum bronze with higher performance. [0003] As we all know, alloying and microalloying are effective means to improve the structure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/01C22C9/05C22C1/03
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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