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Strontium, titanium and boron composite microalloying manganese brass and preparation method of manganese brass

A technology of microalloying and manganese brass, applied in the field of manganese brass and its preparation, achieves the effects of fine grain size, breaking technical blockade and good corrosion resistance

Active Publication Date: 2013-02-06
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 high-performance manganese brass with independent intellectual property rights of strontium, titanium and boron composite microalloying available for use.

Method used

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  • Strontium, titanium and boron composite microalloying manganese brass and preparation method of manganese brass
  • Strontium, titanium and boron composite microalloying manganese brass and preparation method of manganese brass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] like figure 1 shown.

[0029] A strontium, titanium and boron composite microalloyed manganese brass, its preparation method:

[0030] Take 8.3624kg as an example.

[0031] First, 8.3 kg of commercially available manganese brass (52-62% of copper, 0.5-4.0% of manganese, 0.5-3.0% of aluminum, 35-40% of zinc, 0.5-2.5% of iron, 1% of nickel, and the balance of A small amount of impurity elements, the same below) After melting, add 21g of Al-Sr master alloy (89.85%Al, 9.89%Sr (can fluctuate between 8.901% and 10.879), 0.16%Fe, 0.10%Si) (loss rate of Sr about 40%), 41.4g AlTiB master alloy (93.69%Al, 5.01%Ti (can fluctuate between 4.509%~5.511%, loss rate is about 8%), 0.98%B (can be between 0.882%~1.078%) Float between), 0.19%Fe, 0.13%Si), the above-mentioned master 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 is added...

Embodiment 2

[0035] A strontium, titanium and boron composite microalloyed manganese brass, its preparation method:

[0036] Take 8.3624kg as an example.

[0037] First, after melting 8.305kg of commercially available manganese brass (composition: 58.51Cu, 38.47Zn, 1.16Mn, 0.81Al, 0.72Fe, 0.23Ni, the numbers before all element symbols in the examples represent mass percentages, the same below) Add 16g 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%), 41.4g of AlTiB 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%), the master alloy can be purchased directly from the market, or can be prepared by conventional methods. After melting, add the latter intermediate alloy; after it is completely melted, pour it into a ladle, let it stand for 1-5 minutes, remove the slag and cast it into an ingot; that is, the manganese brass with composite microalloying of strontium, titanium and boron is obtained .

[00...

Embodiment 3

[0041] A strontium, titanium and boron composite microalloyed manganese brass, its preparation method:

[0042] Take 8.3624kg as an example.

[0043] First, 8.304 kg of commercially available manganese brass (52-62% of copper, 0.5-4.0% of manganese, 0.5-3.0% of aluminum, 35-40% of zinc, 0.5-2.5% of iron, 1% of nickel, and the balance of A small amount of impurity elements, the same below) After melting, add 42g Al-Sr master alloy (89.85%Al, 9.89%Sr, 0.16%Fe, 0.10%Si) (the loss rate of Sr is about 40%), 19gAlTiB 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%), described master alloy can be purchased directly from the market, also can adopt conventional method to prepare by oneself, During the melting process, wait for the former master alloy to melt before adding the latter master alloy; after it is completely melted, pour it into a ladle, let it stand for 1 to 5 minutes, remove the slag and cast it into an ingot; that is, stronti...

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Abstract

The invention provides strontium, titanium and boron composite microalloying manganese brass which is mainly prepared from the following components in percentage by weight: 0.01 to 0.03% of strontium (Sr), 0.01 to 0.05% of titanium (Ti), 0.002 to 0.008% of boron (B), and the balance of the manganese brass, wherein sum of mass percentage of the components is of 100%. The preparation method of an alloy comprises the technical processes as follows: melting the manganese brass; adding an Al-Sr intermediate alloy and an Al-Ti-B intermediate alloy in sequence, wherein materials are added based on specified sequence, which means that a following intermediate alloy just can be added after a previous intermediate alloy is melted; transferring into a casting ladle after the ally is completely molten; standing; removing slag; and casting to obtain an ingot, thus obtaining the strontium, titanium and boron composite microalloying manganese brass. Compared with a conventional manganese brass, the strontium, titanium and boron composite microalloying manganese brass provided by the invention has the advantages that texture is small, hardness is improved by 21.6%, an uniform corrosion speed in 3.5% of NaCl solution is reduced by 9.9%, and a frictional coefficient is greatly reduced.

Description

technical field [0001] The present invention relates to a kind of manganese brass and its preparation method, especially a kind of novel manganese brass alloy and its preparation method, specifically a kind of strontium, titanium and boron composite micro-alloyed manganese brass and its preparation method . Background technique [0002] Manganese brass is an ancient propeller material that has been used since 1876. Compared with propeller materials such as nickel-aluminum bronze and high-manganese-aluminum bronze, manganese brass has low raw material price and good casting process performance. It is one of the main materials used for medium and small propellers of inland ships. However, with the development of high-speed and large-scale inland ships, higher requirements are put forward for the performance of manganese brass propeller materials. [0003] As we all know, alloying and microalloying are effective means to improve the structure and properties of manganese brass...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04C22C1/03
Inventor 何峰林何峰明丁志红王宏宇许晓静潘励楚满军陈树东
Owner ZHENJIANG JINYE PROPELLER
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