Preparation method of long-period stacking order (LPSO) structural phase enhanced magnesium gadolinium zinc calcium aluminium alloy plate

A calcium-aluminum alloy, magnesium-gadolinium-zinc technology is applied in the field of preparation of long-period ordered stacking structure phase reinforced magnesium-gadolinium-zinc-calcium-aluminum alloy sheets, which can solve the problem of long production cycle, difficulty in forming LPSO phase, and small number of X phases, etc. problems, to achieve the effect of reducing the corrosion rate, increasing the corrosion voltage, and improving the corrosion resistance
CN107058839AActive Publication Date: 2017-08-18TAIYUAN UNIV OF TECH
4 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TAIYUAN UNIV OF TECH
Publication Date
2017-08-18

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a preparation method of a long-period stacking order (LPSO) structural phase enhanced magnesium gadolinium zinc calcium aluminium alloy plate. The preparation method is aimed at the problem that an LPSO structural phase is hard to form in a cast magnesium gadolinium zinc alloy. The preparation method comprises the steps that calcium and aluminium elements are doped in the magnesium gadolinium zinc alloy, vacuum melting, argon bottom blowing protection and casting ingot forming are adopted, forming of the LPSO structural phase is induced, and a cast LPSO structural phase enhanced magnesium gadolinium zinc calcium aluminium alloy ingot is prepared; and an LPSO structural phase enhanced magnesium gadolinium zinc calcium aluminium alloy plate enhanced product is prepared through vacuum hot extrusion aging. The preparation method is advanced in technology, data is accurate and detailed, purity of the product is good and reaches 99.6%, strength reaches 417 MPa, elongation is 12%, corrosion voltage of the cast magnesium gadolinium zinc calcium aluminium alloy is minus 0.447 V, corrosion current density is 5.528 * 10<-6> A / cm<2>, corrosion voltage is improved by 3 times and corrosion rate is decreased by 500 times compared with those of the alloy in which Ca and Al are not added.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a preparation method of a long-period ordered stacking structure phase-reinforced magnesium-gadolinium-zinc-calcium-aluminum alloy plate, which belongs to the technical field of preparation and application of nonferrous metal materials. Background technique

[0002] Long-period stacking order, LPSO has high hardness, high elastic modulus, high thermal stability, and has a coherent interphase interface with the magnesium matrix, which can significantly improve the strength, plasticity, and corrosion resistance of magnesium alloys However, it is difficult for magnesium-gadolinium-zinc alloys to form LPSO phases in the as-cast state, and the LPSO phase can only be formed after a long time of high-temperature solution treatment; while the brittle β-( MgZn) 3 The Gd phase is often distributed in the grain boundary in the form of a coarse continuous network / skeleton, splitting the matrix of the magnesium alloy and deteriorating the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More