Extrusion-ECAP extrusion deformation device and method for preparing fine-grained material
A technology of extrusion deformation and fine grain, which is applied in the field of material processing, can solve the problems of short material length and inability to be widely used in engineering fields, and achieve the effect of improving material strength, meeting requirements, and fine grain size
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[0028] Example 1:
[0029] Such as figure 1 As shown, the device of the present invention includes an upper mold 1 and a lower mold 2. The lower mold 2 is provided with an extrusion cylinder 3 for placing materials, and the bottom of the upper mold 1 is provided with an open end for inserting the material from the top of the extrusion cylinder 3. A convex die 4 extruded from the bottom outlet end of the extrusion barrel 3; the lower die 2 also includes an equal-diameter extrusion channel 5 located in the lower die 2; wherein the bottom of the extrusion barrel 3 has a gradually smaller diameter Funnel shape 6, the outlet end of the bottom of the extrusion cylinder 3 is abutted with the inlet end of the extrusion channel 5, a bend 7 in the middle of the extrusion channel 5 is set at a bend, and the outlet end of the extrusion channel forms an outlet on the outer wall of the lower die.
[0030] In this embodiment, more specifically, the lower mold 2 is composed of a symmetrical left ...
Example Embodiment
[0035] Example 2:
[0036] (1) Smelting in a vacuum induction melting furnace with argon protection, and then casting to obtain qualified magnesium alloy ingots;
[0037] (2) After heating the heat treatment furnace to about 400℃, put the magnesium alloy ingot into the magnesium alloy ingot, keep it for 12 hours, and conduct homogenization heat treatment to eliminate micro segregation;
[0038] (3) The material is cooled to room temperature with the heat treatment furnace, and then machined into an extruded billet;
[0039] (4) Preheat the extruded billet to 250°C, apply lubricant on the surface of the billet and the inner surface of the extrusion cylinder, and then put the billet into the extrusion cylinder for extrusion, so that the billet will undergo extrusion deformation and ECAP deformation , To obtain a Φ8mm×100cm rod, the extrusion temperature is 250℃, the extrusion rate is 4mm / s, and the extrusion ratio is 25;
[0040] (5) The extruded bar is subjected to solution annealing, t...
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