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Anticorrosion magnesium alloy

A magnesium alloy and corrosion-resistant technology, applied in the field of corrosion-resistant magnesium alloys, can solve the problems of poor plasticity at room temperature, low mechanical properties, poor corrosion resistance, etc., and achieve the effects of large solid solubility, improved corrosion resistance, and reduced hazard.

Inactive Publication Date: 2012-07-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the performance shortcomings of pure magnesium, the present invention provides a corrosion-resistant magnesium alloy containing cadmium, which solves the problems existing in the prior art, such as easy combustion during smelting, poor plasticity at room temperature, low mechanical properties, and no corrosion resistance.

Method used

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Embodiment 1

[0020] Embodiment 1: Mg+Cd (Cd=0.9%) alloy

[0021] In the present embodiment, the composition and mass percent of the corrosion-resistant magnesium alloy containing cadmium are: Cd 0.9%, impurity element Fe 0.015%, Cu 0.0015%, Si 0.008%, Ni 0.0015%, Mg surplus; select magnesium ingot ( purity 99.995wt%) and cadmium ingot (purity 99.995wt%); the corrosion properties of the alloy are shown in Table 1, the mechanical properties are shown in Table 2, and the effects of inhibiting hydrides and negative differential numbers are shown in Figure 1.

[0022] Weigh the material according to the ratio, preheat the pure magnesium to 200°C, put it into a low-carbon steel crucible with a preheating temperature of 300°C, and put it into SF 6 -CO 2 Shielding gas (SF 6 :CO 2 The volume ratio is 1:100), when the magnesium alloy is completely melted and the melt temperature reaches 730-740°C, add cadmium ingots, which are preheated to 200°C; then continue to stir, and pass into SF 6 -CO 2 ...

Embodiment 2

[0023] Embodiment 2: Mg+Cd (Cd=1.7%) alloy

[0024] In the present embodiment, the composition and mass percent of the corrosion-resistant magnesium alloy containing cadmium are: Cd 1.7%, impurity element Fe 0.018%, Cu 0.0016%, Si 0.007%, Ni 0.0012%, Mg surplus; select magnesium ingot ( purity 99.995wt%) and cadmium ingot (purity 99.995wt%); the corrosion properties of the alloy are shown in Table 1, the mechanical properties are shown in Table 2, and the effects of inhibiting hydrides and negative differential numbers are shown in Figure 1.

[0025] Weigh the material according to the ratio, preheat the pure magnesium to 200°C, put it into a low-carbon steel crucible with a preheating temperature of 300°C, and put it into SF 6 -CO 2 Shielding gas (SF 6 :CO 2 The volume ratio is 1:100), when the magnesium alloy is completely melted and the melt temperature reaches 730-740°C, add cadmium ingots, which are preheated to 200°C; then continue to stir, and pass into SF 6 -CO 2 ...

Embodiment 3

[0026] Embodiment 3: Mg+Cd (Cd=2.4%) alloy

[0027] In the present embodiment, the composition and the mass percent of the corrosion-resistant magnesium alloy containing cadmium are: Cd 2.4%, impurity element Fe 0.010%, Cu 0.0013%, Si 0.01%, Ni 0.002%, Mg surplus; select magnesium ingot ( purity 99.995wt%) and cadmium ingot (purity 99.995wt%); the corrosion properties of the alloy are shown in Table 1, the mechanical properties are shown in Table 2, and the effects of inhibiting hydrides and negative differential numbers are shown in Figure 1.

[0028] Weigh the material according to the ratio, preheat the pure magnesium to 200°C, put it into a low-carbon steel crucible with a preheating temperature of 300°C, and put it into SF 6 -CO 2 Shielding gas (SF 6 :CO 2 The volume ratio is 1:100), when the magnesium alloy is completely melted and the melt temperature reaches 730-740°C, add cadmium ingots, which are preheated to 200°C; then continue to stir, and pass into SF 6 -CO ...

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Abstract

The invention relates to an anticorrosion magnesium alloy, belonging to the field of metal materials. The magnesium alloy comprises the following components by mass: 0.3-3% of Cd, not more than 0.02% of Fe, not more than 0.002% of Cu, not more than 0.01% of Si, not more than 0.002% of Ni and the balance of magnesium, wherein Fe, Cu, Si and Ni are impurity elements. The alloy has the following beneficial effects: the element cadmium is added to the alloy, thus obviously lowering the cost of the alloy and avoiding the rare earth resources from being wasted; and the mechanical performance and the anticorrosion performance of the alloy are superior to the mechanical performance and the anticorrosion performance of pure magnesium, thus solving the problems of easy combustion, poor room temperature plasticity, lower mechanical performance, incapability of being against corrosion and the like during smelting in the prior art.

Description

technical field [0001] The invention relates to a corrosion-resistant magnesium alloy and belongs to the field of metal materials. Background technique [0002] Magnesium alloy is the lightest metal material among practical metals. The development and utilization of magnesium alloy products is the trend of development in the world today. It has shifted from the aerospace industry to the fields of automobiles, electronic information, and household appliances. It has broad application prospects and development potential. 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 pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04
Inventor 董俊华胥珊娜柯伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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