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Mg-Sr-Ti-B composite micro-alloyed manganese brass and preparation method thereof

A technology of micro-alloying and manganese brass, which is applied in the field of brass alloys and its preparation, can solve the problems that the performance of manganese brass cannot meet the requirements of high-performance use, and achieve fine grain size, good corrosion resistance and low friction coefficient Effect

Active Publication Date: 2014-05-14
江苏国鑫铝业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the performance of existing manganese brass is difficult to meet the requirements of high-performance use, and to invent a manganese brass composite microalloyed with magnesium, strontium, titanium and boron, by adding trace amounts of magnesium, strontium, titanium and Boron element further microalloys it to improve the performance of manganese brass, and at the same time provides a method for preparing microalloyed manganese brass using an intermediate alloy method

Method used

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  • Mg-Sr-Ti-B composite micro-alloyed manganese brass and preparation method thereof
  • Mg-Sr-Ti-B composite micro-alloyed manganese brass and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] like figure 1 , 2 shown.

[0022] A magnesium, strontium, titanium and boron composite microalloyed manganese brass, its preparation method:

[0023] Take 8.4715kg as an example.

[0024] First, 8.4025 kg of commercially available manganese brass (mainly composed of copper (Cu), aluminum (Al), manganese (Mn), zinc (Zn), iron (Fe) and nickel (Ni), the mass of zinc (Zn) The percentage is 35~40%, the mass percentage of manganese (Mn) is 0.5~4.0%, the mass percentage of aluminum (Al) is 0.5~3.0%, the mass percentage of iron (Fe) is 0.5~2.5%, nickel (Ni) The mass percentage is ￡1.0%, the same below) After melting, add in sequence:

[0025] 1. Al-Sr master alloy prefabricated or directly ordered from the market: 21.2g (89.85%Al, 9.89%Sr (strontium content can fluctuate 10% around 9.89%), 0.16%Fe, 0.10%Si) (Sr The loss rate is about 40%),

[0026] 2. Al-Ti-B master alloy prefabricated or directly ordered from the market: 41.9g (93.69% Al, 5.01% Ti (the content of titaniu...

Embodiment 2

[0032] A magnesium, strontium, titanium and boron composite microalloyed manganese brass, its preparation method:

[0033] Take 8.4715kg as an example.

[0034] First, after melting 8.4027kg of manganese brass, add 15.2g of Al-Sr master alloy (89.85%Al, 9.89%Sr, 0.16%Fe, 0.10%Si) (the loss rate of Sr is about 40%), 46.3g Al-Ti-B master alloy (93.69%Al, 5.01%Ti, 0.98%B, 0.19%Fe, 0.13%Si) (Ti loss rate is about 8%), 10g Mg (Mg loss rate is about 20% ), the master alloy can be purchased directly from the market, or can be prepared by yourself by conventional methods; after it is completely melted, it is poured into a ladle, and after standing for 1 to 5 minutes, the slag is removed and cast into an ingot; that is, magnesium, Strontium, titanium and boron composite microalloyed manganese brass

[0035] The composition of the composite microalloyed manganese brass of the present embodiment is actually measured by spectrum: 37.07%Zn, 1.42%Mn, 1.52%Al, 0.73%Fe, 0.32%Ni, 0.094%Mg, 0...

Embodiment 4

[0048] A magnesium, strontium, titanium and boron composite microalloyed manganese brass, its preparation method:

[0049] Take 8.4715kg as an example.

[0050] First, after melting 8.378kg of manganese brass, add 45.6g of Al-Sr master alloy (89.85%Al, 9.89%Sr, 0.16%Fe, 0.10%Si) (the loss rate of Sr is about 40%), 46.3g Al-Ti-B master alloy (93.69%Al, 5.01%Ti, 0.98%B, 0.19%Fe, 0.13%Si) (the loss rate of Ti is about 8%), 4.8g Mg (the loss rate of Mg is about 20 %), the master alloy can be purchased directly from the market, or can be self-prepared by conventional methods; after it is completely melted, it is poured into a ladle, and after standing for 1 to 5 minutes, the slag is removed and cast into an ingot; that is, to obtain magnesium , strontium, titanium and boron composite microalloyed manganese brass

[0051] The composition of the composite microalloyed manganese brass of the present embodiment is actually measured by spectrum: 37.07%Zn, 1.42%Mn, 1.52%Al, 0.73%Fe, 0....

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Abstract

The invention discloses an Mg-Sr-Ti-B composite micro-alloyed manganese brass and a preparation method thereof. The Mg-Sr-Ti-B composite micro-alloyed manganese brass is characterized by comprising 0.05 to 0.1% by mass of Mg, 0.005 to 0.03% by mass of Sr, 0.008 to 0.05% by mass of Ti, 0.002 to 0.0075% by mass of B and the balance manganese brass. The preparation method comprises the following steps of melting manganese brass, orderly adding an Al-Sr intermediate alloy, an Al-Ti-B intermediate alloy and pure Mg into the melted manganese brass, after full melting, pouring the fully-melted mixture into a casting ladle, standing, removing dregs, and carrying out casting to obtain a cast ingot of the Mg-Sr-Ti-B composite micro-alloyed manganese brass. Compared with the conventional manganese brass, the Mg-Sr-Ti-B composite micro-alloyed manganese brass has a fine microstructure, hardness improved by 11.6%, a uniform corrosion rate reduced by 7.6% in a NaCl solution having a concentration of 3.5%, and a friction coefficient greatly reduced.

Description

technical field [0001] The present invention relates to a kind of brass alloy and its preparation method, especially a kind of manganese brass alloy and its preparation method, specifically a kind of magnesium, strontium, titanium and boron composite micro-alloyed manganese brass and its preparation method. Background technique [0002] Compared with materials such as nickel-aluminum bronze and high-manganese-aluminum bronze, manganese brass has lower raw material prices and better casting process performance. Manganese brass is a material that is still widely used in inland water pumps, valves, ship propellers and other fields. In recent years, since the performance of manganese brass has not been significantly improved, it has gradually been unable to meet the requirements of the rapid development of modern ships. [0003] As we all know, alloying and microalloying are effective means to improve the structure and properties of manganese brass. Composition from manganese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04C22C1/03
Inventor 许晓静潘励王宏宇陈树东楚满军何峰林何峰明丁志红
Owner 江苏国鑫铝业有限公司
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