43results about How to "Weakened texture" patented technology

The invention relates to a heat-resistant soluble magnesium alloy and a preparation method and application of the heat-resistant soluble magnesium alloy. The heat-resistant soluble magnesium alloy isprepared from the following elements comprising by atom, 0.10%-8.00% of Lu, 0.001-0.05% of Ce, 0.10%-0.60% of Al, 0.001%-0.50% of Ca, 0.01%-1.00% of Cu, 0.01%-1.00% of Ni, less than 0.30% of impurityelements and the balance Mg. Lu5Mg24, Mg2Cu, Mg2Ni, Mg12Ce, Al11Ce3 and (Mg, Al) 2Ca high-temperature phases and long period orderly-stacked LPSO phase Mg-Lu-Al and Mg-Ce-Al are formed in the magnesium alloy. The magnesium alloy has good mechanical properties at 150 DEG C, and the dissolution rate of the magnesium alloy in the 3% KCl solution at 93 DEG C is 30-100mg.cm<-2>h<-1>.

The invention discloses a method for realizing the weakening of the texture of an ATX series magnesium alloy plate by adopting asymmetric extrusion, and belongs to the technical field of magnesium alloy extrusion processing. In the invention, the ATX series magnesium alloy ingot is homogenized firstly, then the magnesium alloy plate is prepared by conventional extrusion, and finally the extruded plate is preheated and put into an asymmetric extrusion die for extrusion. Since the central axis of the forming channel hole of the asymmetric extrusion die does not coincide with the central axis of the extrusion die cavity, the proportion of the billets on the left and right sides of the forming channel hole in the mold cavity is different, and extra parts of the billet will be upset during the extrusion process. Coarse deformation, the entire extrusion deformation process can be regarded as the combined superposition of upsetting and extrusion deformation, so the texture of the finally obtained asymmetric extruded sheet is obviously weaker than that of the initial extruded sheet. The asymmetric extrusion die is easy to manufacture, simple to operate and easy to implement, and has good industrial application prospects.

The invention discloses a light alloy rolling compound forming process with controllable edge cracking, which belongs to the technical field of light alloy plate compound forming process. Alloy liner, the alloy plate and the hard liner are heated and rolled together. The grooves can effectively control the edge cracks during the rolling process; the protrusions cooperate with the rolls to cause local severe shear deformation of the alloy plate during the rolling process, promote the widening of the plate along the transverse direction, and weaken the texture Effect. The entire liner is the same as the liner rolling in the composite forming process, which can increase the single-pass reduction, reduce the rolling passes, reduce the rolling temperature, and more effectively refine the grain size. Under the premise of controllable edge cracking, the whole deformation process can be regarded as the compound superposition of rolling, shearing and widening deformation of the lining plate. The whole technological process is simple and easy to realize, and has good industrial application prospect.

The invention relates to a large reduction rolling method for magnesium alloy. According to the rolling method, a hard alloy lining plate is additionally arranged on the upper surface or the lower surface of the magnesium alloy, or two hard alloy lining plates are additionally arranged on the upper surface and the lower surface of the magnesium alloy at the same time, and the added hard alloy lining plates are rolled synchronously together with the magnesium alloy. The rolling method includes the steps that after a high temperature lubricating agent is evenly smeared on the surfaces of the lining plates and the surface of the magnesium alloy, the high temperature lubricating agent, the lining plates and the magnesium alloy are simultaneously placed into a heating box to be heated, after the temperature rises to a preset temperature, standing and thermal insulation are performed for a certain period of time, one hard alloy lining plate is placed on the upper surface or the lower surface of magnesium alloy blank, or the two hard alloy lining plates are placed on the upper surface and the lower surface of the magnesium alloy at the same time, and the hard alloy lining plates and the magnesium alloy are simultaneously fed into the position between rollers so that rolling can be completed. Through the method, the single pass reduction of the magnesium alloy can be greatly increased in the rolling process, the number of rolling passes is decreased, magnesium alloy crystalline grains are thinned, the texture is weakened, magnesium alloy plates with high strength and plasticity are prepared, and the large reduction rolling method for the magnesium alloy is also suitable for the large deformation rolling process of titanium, manganese and metal-matrix composite materials.

The invention relates to the field of metal material rolling processing and particularly discloses a method for carrying out warming, rotary rolling, fragmentation and spheroidization on a second phase in magnesium alloy. The method comprises the following steps: S1, carrying out earlier stage thermal insulating treatment; S2, carrying out single-pass fragmentation on the second phase; and S3, carrying out warming and rotary rolling on the second phase. According to the method, warming four-pass rotary rolling is utilized, and clockwise 90-degree rotation is realized each pass, so that the situation that the second phase is cured in a multidirectional manner is ensured, and submicron order second phase also can separate out dynamically; and in addition, high-density dislocation is introduced during first-pass low temperature rolling to promote dynamic recrystallization and realize the purpose of refining grain during the following warming rolling process; and moreover, the submicron order second phase and fine grain structures improve the strengthening and processing hardening capacity and improve the strength and plasticity simultaneously.

The invention provides a method for preparing a billet for a medicine-shaped cover, which sequentially performs multi-directional reciprocating and ultra-low temperature large-deformation extrusion; the multi-directional reciprocating upsetting extrusion is sequentially performed on three faces of the six-sided billet with the same apex Reciprocating upsetting extrusion, single extrusion ratio ≥ 1.5, complete 2 to 4 cycles of multi-directional reciprocating upsetting extrusion; the ultra-low temperature and large deformation extrusion is to subject the billet to cryogenic treatment for 60 to 150 minutes, and extrude the working part of the extrusion die The inner cone angle is 90°~140°, and the extrusion rate is 10~20mm / s. The invention can realize fine-grained and weak texture structure, and improve the isotropy, high yield ratio and high ductility of the liner.

The invention relates to a method for preparing a magnesium alloy plate strip with a grain size in symmetric gradient distribution along a plate thickness direction. In the method, the magnesium alloy plate strip is subjected to bidirectional continuous bending deformation and then recrystallization annealing; during deformation, a surface layer is subjected to large twinning deformation, and shear stress applied to the surface layer makes a base surface texture deflected and weakens the original texture; during annealing, the surface layer with large deformation is subjected to static recrystallization so as to refine grains and randomize the texture; and when the deformation is less than or equal to 0.03, the grains on the surface layer are quickly recrystallized and grown to be coarsened due to a low recrystallization nucleation rate. By the method, two gradient materials with refined or coarsened grains on the surface layer can be prepared. The process is reasonable in design and easy to operate, required equipment is realized by modifying and upgrading the conventional straightener, the gradient structure along the plate thickness direction is obtained by coordinating repeated bending with recrystallization annealing, the texture of the magnesium alloy plate strip is weakened, the strength and the ductility of the magnesium alloy plate strip are improved, and the subsequent processability of a magnesium alloy plate is improved.