5results about How to "Weakened base texture" patented technology

The invention discloses a zirconium alloy cast ingot, a high-quality Zr-Sn-Nb alloy strip for nuclear power and a preparation method and application of the high-quality Zr-Sn-Nb alloy strip. According to the method, a direct hot rolling coiling process of the zirconium alloy large plate blank is adopted, the technical parameters of hot continuous rolling of the large plate blank, namely the plate blank thickness, the hot rolling temperature, the rolling speed and the pass deformation, are mainly controlled, and the key performance such as zirconium alloy corrosion is guaranteed; according to the process, the deformation amount is increased, the basal texture is weakened, the transverse texture is improved, and the structure performance of the finished strip is improved.

The present application belongs to the field of light metal plastic forming, and particularly relates to a device and method for preparing fine-grained magnesium alloy rod by asymmetric multi-directional shear extrusion. The wedge block combination in the present application can combine multi-directional shear extrusion deformation and differential speed torsional deformation, effectively weaken the magnesium alloy basal plane texture, and improve the mechanical properties of the magnesium alloy. While the magnesium alloy material is subjected to torsional extrusion in the torsional extrusion deformation zone, the sectional area of the channel gradually decreases, and the angle of the channel deflection is different, so that the frictional force of the magnesium alloy material on the surface of the convex and concave dies at the contact position is different, and the degree of torsional deformation is also different, so that the material realizes differential speed torsional deformation, and the grain refinement effect of the magnesium alloy rod is more remarkable. When the magnesium alloy material passes through the large and small concave dies, the deformation degrees of the magnesium alloy material are different due to the particularity of the structure, so that the grain refinement is effectively realized. At the same time, the flowability of the magnesium alloy material is also different, causing differential speed flow to deflect the c-axis, thereby weakening the texture.

The invention belongs to the technical field of rare earth magnesium alloy materials, and discloses a high-strength and high-plasticity rare earth magnesium alloy deformed material which is prepared from the following raw materials in percentage by mass: 8-9.5% of Gd, 3-4.5% of Y, 2-3.5% of Zn, 0.4-0.6% of Zr, 0.3-0.6% of Ca and the balance of Mg. The invention further discloses a preparation method of the magnesium alloy deformed material. The preparation method comprises the steps of smelting and casting, homogenizing treatment, variable-speed isothermal extrusion treatment, aging treatment and the like. By adding the Ca element and adjusting the proportion of all metal elements in the alloy, the magnesium alloy deformed material shows excellent comprehensive mechanical properties, the yield strength is 416 MPa-420 MPa, the tensile strength is 471 MPa-477 MPa, and the ductility is 13.0%-13.7%.

The invention belongs to the technical field of magnesium alloy plastic forming, and specifically relates to a device and method for preparing a weak texture fine-grained magnesium alloy rod; the device comprises a punch, an extrusion die, and a twisting die, the punch is installed on the action end of a vertical sliding mechanism, the twisting die is connected to a torque input mechanism, and rotates synchronously with the downward movement of the punch; a variable-section curved channel is arranged in the extrusion die, and a twisting variable-section channel is arranged in the twisting die; the variable-section curved channel comprises an entrance channel, a first extrusion channel, a transition channel of equal diameter, and a second extrusion channel from top to bottom in sequence; the transition channel comprises a first transition channel, a second transition channel, and a third transition channel connected at a corner; a plurality of spherical convex hulls are distributed above and below in the twisting variable-section channel; the magnesium alloy billet undergoes multiple variable-section twistings in the variable-section curved channel and the twisting variable-section channel, a large amount of shear torsional deformation is introduced in the deformation process, and the grain size is greatly reduced compared with the magnesium alloy before extrusion.

The invention provides an ultralight high-strength and high-plasticity dual-phase magnesium-lithium alloy as well as a preparation process and application thereof. The ultralight high-strength and high-plasticity dual-phase magnesium-lithium alloy comprises the following components in percentage by weight: 6.5 to 9.5 percent of Li, 1 to 5 percent of Al, 1 to 5 percent of Zn, 0.2 to 4 percent of RE (rare earth element), 0.2 to 1 percent of Ca and the balance of Mg. According to the preparation process, on the basis of a dual-phase Mg-Li-Al-Zn alloy system, preparation of the ultra-light high-strength and high-plasticity dual-phase magnesium-lithium alloy is achieved through the measures of adding double rare earth elements Gd and Y and a grain refining element Ca, optimizing smelting process parameters, heat treatment and composite deformation process parameters and the like. The magnesium-lithium alloy has excellent mechanical properties, is suitable for industrial production, and can meet the performance requirements required by magnesium-lithium alloy application in the fields of aerospace, traffic transportation and the like.