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Niobium-containing corrosion-resistant magnesium alloy

A magnesium alloy, corrosion-resistant technology, applied in the field of metal alloy materials, can solve the problems of poor plasticity at room temperature, easy to burn, and non-corrosion resistance, and achieve the effects of reducing corrosion rate, reducing the area of ​​the cathode phase, and enhancing the corrosion resistance of the matrix

Inactive Publication Date: 2014-12-31
无棣向上机械设计服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned technical defects, the present invention provides a corrosion-resistant magnesium alloy containing niobium, which solves the problems of easy combustion during smelting, poor room temperature plasticity, low mechanical properties, and non-corrosion resistance in the existing magnesium alloy technology. On the basis of alloy AZ30, the corrosion resistance of magnesium alloy is significantly improved by adding a certain amount of metal niobium for alloying and modification treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A corrosion-resistant magnesium alloy containing niobium, the weight percentage of the chemical composition of the magnesium alloy is: Al is 3wt%, Zn is 0.8wt%, Mn is 0.3wt%, Nb is 0.01wt%, and the balance is Mg.

[0022] Weigh the materials according to the ratio, preheat each component to 220°C, put aluminum ingots, zinc ingots and manganese nails into a low-carbon steel crucible with a preheating temperature of 280°C to melt, and pass through SF 6- CO 2 Shielding gas (SF 6 :CO 2 The volume ratio is 1:10), when the components are completely melted and the melt temperature reaches 740°C, niobium ingots are added, the niobium ingots are preheated to 200°C, then continuously stirred, and SF 6 -CO 2 Protect the gas until the alloy is completely melted, stir for 5 minutes, stand still for 20 minutes when the temperature reaches 710°C, and pour at 700°C to finally obtain a corrosion-resistant magnesium alloy containing niobium.

Embodiment 2

[0024] A corrosion-resistant magnesium alloy containing niobium, the weight percentage of the chemical composition of the magnesium alloy is: Al is 4.1wt%, Zn is 1.0wt%, Mn is 0.5wt%, Nb is 0.20wt%, and the balance is Mg.

[0025] Weigh the materials according to the ratio, preheat each component to 220°C, put aluminum ingots, zinc ingots and manganese nails into a low-carbon steel crucible with a preheating temperature of 280°C to melt, and pass through SF 6- CO 2 Shielding gas (SF 6 :CO 2 The volume ratio is 1:10), when the components are completely melted and the melt temperature reaches 730°C, niobium ingots are added, the niobium ingots are preheated to 200°C, then continuously stirred, and SF 6 -CO 2 Protect the gas until the alloy is completely melted, stir for 5 minutes, stand still for 20 minutes when the temperature reaches 710°C, and pour at 700°C to finally obtain a corrosion-resistant magnesium alloy containing niobium.

Embodiment 3

[0027] A corrosion-resistant magnesium alloy containing niobium, the weight percentage of the chemical composition of the magnesium alloy is: Al is 3.5wt%, Zn is 0.9wt%, Mn is 0.35wt%, Nb is 0.05wt%, and the balance is Mg.

[0028] The method for preparing the corrosion-resistant magnesium alloy is the same as that in Example 1.

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PUM

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Abstract

The invention relates to the technical field of metal alloy materials, in particular to niobium-containing corrosion-resistant magnesium alloy. The magnesium alloy comprises the following chemical components in percentage by weight: 3-4.1 wt% of Al, 0.8-1.0 wt% of Zn, 0.3-0.5 wt% of Mn, 0.01-0.20 wt% of Nb and the balance of Mg. Relative to rare earth elements and toxic heavy metals like cadmium, niobium has the largest solid solubility in the magnesium alloy, can be easily added in the smelting process and are relatively low in cost, so that the corrosion resistance of the AZ30 magnesium alloy is improved and the cost of the magnesium alloy can be reduced.

Description

technical field [0001] The invention relates to the technical field of metal alloy materials, in particular to a corrosion-resistant magnesium alloy containing niobium. Background technique [0002] Magnesium alloy has a series of advantages, such as high specific strength and specific stiffness, the strength is close to aluminum alloy, but the density is only 2 / 3 of aluminum alloy and 1 / 4 of steel; its elastic modulus is much higher than the specific strength Fiber-reinforced plastics are roughly the same as high-strength aluminum alloys and alloy steels, and can be 100% recycled, in line with environmental protection laws; they also have good damping properties and excellent cutting performance, and their thermal conductivity is second only to aluminum alloys and Non-magnetic; in addition, high dimensional stability, small shrinkage, not easy to change due to changes in ambient temperature. However, its poor corrosion resistance has become an obstacle to the industrial ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02
Inventor 姬胜国
Owner 无棣向上机械设计服务有限公司