Multielement-enhanced heat-resistant corrosion-resistant magnesium alloy and manufacturing method thereof

Abstract

The invention discloses a multielement-enhanced heat-resistant corrosion-resistant magnesium alloy and a manufacturing method of the multielement-enhanced heat-resistant corrosion-resistant magnesium alloy. The ingredients of the multielement-enhanced heat-resistant corrosion-resistant magnesium alloy comprise pure magnesium ingots, pure zinc ingots, Mg-Gd alloy, Mg-Y alloy, Mg-Nd alloy, Mg-Ca alloy, Mg-Zr alloy and nanometer-scale NdN particles. The elements in the raw materials comprise, by mass, 3.5-5.0% of Gd, 1.0%-3.0% of Y, 0.5%-0.8% of Nd, 0.8%-1.5% of Zn, 0.3%-0.8% of Ca, 0.3%-0.6% of Zr, 0.5%-1.5% of nanometer-scale NdN particles and the balance Mg. The sequence of the mass percentage contents of the three rare earth elements of the Gd, the Y and the Nd from large to small is Gd>Y>Nd, and the mass percentage of the total addition amount of the three rare earth elements of the Gd, the Y and the Nd does not exceed 10%. The particle size of the nanometer-scale NdN particles is 80-150 nm. The steps of pretreatment and cladding of the NdN particles, preheating of the ingredients, smelting, refining, doping, pouring, sectioned solution treatment and artificial aging treatment are sequentially conducted, and then the fine, dispersive nanometer-precipitated-phase microscopic-structure heat-resistant corrosion-resistant magnesium alloy product is obtained. By the adoption of the multielement-enhanced heat-resistant corrosion-resistant magnesium alloy and the manufacturing method of the multielement-enhanced heat-resistant corrosion-resistant magnesium alloy, the manufacturing cost is low, and the heat resistance and corrosion resistance of the magnesium alloy are excellent.

Description

technical field [0001] The invention relates to a magnesium alloy, in particular to a multi-component reinforced heat-resistant and corrosion-resistant magnesium alloy. The invention also relates to a manufacturing method of the multi-component reinforced heat-resistant and corrosion-resistant magnesium alloy. Background technique [0002] Magnesium alloys have the advantages of low density, high specific strength and specific stiffness, good shock absorption, casting performance, machinability and regeneration, and are considered to be "green engineering materials in the 21st century". Transportation and other fields have broad application prospects. However, at present, most Mg-Al alloys begin to soften and coarsen when they exceed 120 °C, and their mechanical properties are greatly reduced, which cannot meet the requirements for long-term use at higher temperatures; in addition, the corrosion potential of magnesium alloys is low. Easy to corrode, poor heat resistance an...

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Problems solved by technology

[0005] The primary purpose of the present invention is to solve the problems in the prior art that it is necessary to add a relatively high content of Gd or Y elements in the magnesium alloy to obtain a better strengthening effect, and the problem of poor corrosion resistance of the heat-resistant magnesium alloy, and to provide a Multi-component reinforced heat-resistant and corrosion-resistant magnesium alloy with low manufacturing cost and superior performance

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