30 results about "ZK60 magnesium alloy" patented technology

The invention relates to a preparation method of a biodegradable magnesium alloy / calcium phosphate coating composite material. The preparation method comprises the steps of pre-treating a matrix, preparing a conversion liquid, and preparing a bionic calcium phosphate coating to obtain the biodegradable magnesium alloy / calcium phosphate coating composite material. Compared with the prior art, the preparation method has the advantages that the prepared ZK60 magnesium alloy / calcium phosphate coating composite material can be used for remarkably improving the corrosion resistance of a ZK60 magnesium alloy, greatly reducing the degradation rate of the ZK60 magnesium alloy in a bionic body liquid and promoting the research and application of the ZK60 magnesium alloy in the medical field.

The invention provides a high yield ratio deformed magnesium alloy containing rare earth cerium and yttrium. The composition of the alloy includes Mg, Zn, Zr, Ce, and Y, and the mass percentage of each component is: Zn: 4.90~5.20wt .%; Zr: 0.50~0.80wt.%; Ce: 0.50~0.70wt.%; Y: 0.10~1.50wt.%; unavoidable impurities <0.12wt.%; the balance is Mg. Adding a certain amount of cerium and yttrium to the ZK60 magnesium alloy can effectively refine the grains. The cerium, yttrium and magnesium and zinc in the alloy form a fine and dispersed strengthening phase, which can effectively prevent the growth of recrystallized grains during thermal deformation. Large and strengthened matrix, high yield ratio can be obtained, the yield strength exceeds 300MPa, which is significantly higher than the high-strength wrought magnesium alloy ZK60, while ensuring good plasticity. The material of the invention can increase the reliability of mechanical parts, improve product quality, increase material utilization rate, and fully tap the use potential of magnesium alloy materials.

The invention provides a magnesium alloy material of high intensity and high yield ratio. The alloy comprises the following components by mass: 5.0-9.0% of Zn; 0.5-1.5% of Mn; 1-10% of Sn; less than 0.15% of inevitable impurities; and the balance magnesium. By means of plastic forming and a choice of reasonable technological conditions for heat treatment after forming, the magnesium alloy material of the invention can be of high intensity and high yield ratio, and is higher than the high-strength wrought magnesium alloy ZK60 in terms of yield strength and tensile strength. With low cost, goodextrudability and formability at a low temperature, the magnesium alloy material provided in the invention boasts substantial application potential, thus being able to partly replace the magnesium alloy material ZK60.

The invention relates to the technical field of wrought magnesium alloys, and specifically provides a method for regulating and improving the grain structure of ZK60 wrought magnesium alloys. The method of the invention comprises that after the ZK60 wrought magnesium alloy to be treated is subjected to solid solution treatment, the stepwise heating and pre-aging treatment is carried out, and then the extrusion treatment is carried out. This method can effectively control the grain size of ZK60 magnesium alloy by adding stepped pre-aging treatment, significantly improve the strength and plasticity of the material, fully exploit the advantages of low density and high specific strength of ZK60, and realize the promotion and application of ZK60 magnesium alloy in new energy buses. And the core problem of the lightweight goal of automobiles, laying the foundation for the promotion and application of ZK60 magnesium alloy in new energy buses.

The invention relates to a method for preparing a degradable magnesium alloy and modified polylactic acid coating composite material. The method includes the following steps that a magnesium alloy matrix is polished so that a surface oxidization layer is removed; acid etching pre-treatment and neutralizing treatment are carried out on the magnesium alloy matrix; polylactic acid is dissolved in a chloroform solution and a polylactic acid solution is prepared; the magnesium alloy matrix is immersed in the polylactic acid solution, and the surface of the magnesium alloy matrix is wrapped with a polylactic acid coating in a solution immersing and coating method; the obtained magnesium alloy material wrapped with the polylactic acid is stored for 2-3 days in a ventilated place, so that chloroform in the polylactic acid solution is volatilized completely, and the degradable magnesium alloy and modified polylactic acid coating composite material is obtained. Compared with the prior art, the anti-corrosion performance of ZK60 magnesium alloy can be improved obviously through the obtained magnesium alloy and modified polylactic acid coating composite material, the degradation rate of the ZK60 magnesium alloy in an organism can be greatly reduced, and researching and application of the ZK60 magnesium alloy in the medical field are promoted.

The invention discloses a low-cost preparation method of an ultrafine-grained high-strength plastic rare earth magnesium alloy. The low-cost preparation method comprises the steps of alloy smelting, solution treatment and isothermal extrusion, specifically, firstly a ZK60 magnesium alloy containing a rare earth element ytterbium (Yb) with a mass percentage of 0.8-1.5% is smelted according to the composition, then rapidly condensed into an ingot and then subjected to the solution treatment at 400 DEG C for 48 h, and finally the isothermal extrusion is performed at 330-350 DEG C with a strain rate of 0.1-1.0 s<-1> and an extrusion ratio of 10-30 to obtain an ultrafine-grained high-strength plastic magnesium alloy block with an average grain size of less than 1 [mu]m, the tensile strength ofmore than 400 MPa and the elongation of more than 15%. According to the low-cost preparation method of the ultrafine-grained high-strength plastic rare earth magnesium alloy, conventional low extrusion ratio deformation is utilized to obtain an ultrafine-grained structure which is difficult to obtain in a conventional magnesium alloy system, the addition amount of the rare earth element is combined to control the strength and plasticity of the alloy, and finally a magnesium alloy block material which is refined in structure and has high strength and plasticity is obtained. The cost is low, theprocess is short, the efficiency is high, and good industrial application prospects are achieved.

The invention discloses a method for reinforcing a ZK60 magnesium alloy by adding Sc, which is realized by adding a rare-earth element Sc into the ZK60 magnesium alloy. The method comprises the following concrete steps of: smelting and ingot making, homogenizing, hot-extruding, heat treatment and the like. Because of the addition of the Sc, crystalline grains of the ZK60 magnesium alloy is effectively refined, intergranular reticular precipitated phases become thin with uniform distribution, and thin and diffused particle-shaped precipitated phases are formed at a crystal boundary, and after the intergranular reticular precipitated phases and thin and diffused particle-shaped precipitated phases are subjected to homogenization, extrusion and heat treatment, the tensile strength of the alloy can reach 364MPa, the yield strength can reach 352MPa and the yield ratio is close to 1. Compared with the common ZK60 alloy, a product in the method has the tensile strength and the yield strengthwhich are respectively improved by 39MPa and 67MPa, and thus, the tensile strength and the yield strength of the ZK60 magnesium alloy are obviously improved and the industrial application range of the ZK60 magnesium alloy is widened.