Rolling machining method for improving microstructure texture and mechanical property of magnesium alloy sheet strip
A magnesium alloy plate and processing method technology, applied in the direction of metal rolling, etc., can solve the problems of small pass reduction, limited processing deformation, and high plate preparation cost, achieve controllable grain size, and weaken basal surface texture. , the effect of improving mechanical properties
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[0031] Example 1:
[0032] AZ31 magnesium alloy hot-rolled billet, its macro-texture {0001} pole figure is shown in figure 1 shown. figure 1 The macroscopic pole figure of , shows that the hot-rolled slab has a strong basal texture with a maximum strength of 7.795. The AZ31 magnesium alloy hot-rolled slab with an initial thickness of 7mm was continuously cooled and rolled, and the rolling path was unidirectional synchronous rolling. The rolling temperature was 400 °C, and the number of continuous rolling was 4 passes. The secondary reduction is about 5%; after continuous rolling, intermediate annealing at 350°C is performed, and the annealing time is 30 minutes, and then the aforementioned continuous cooling and rolling is repeated until the thickness of the magnesium alloy sheet reaches the required size.
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[0033] Example 2:
[0034] The AZ31 magnesium alloy hot-rolled billet with an initial thickness of 4 mm has a macro-texture {0001} pole figure as shown in figure 1 shown. figure 1 The macroscopic pole figure of , shows that the hot-rolled slab has a strong basal texture with a maximum strength of 7.795. The AZ31 magnesium alloy hot-rolled slab is subjected to continuous cooling and rolling. The rolling path is unidirectional asynchronous rolling (different speed ratio is 1.1-1.5), the rolling temperature is 350 °C, and the number of continuous rolling is 2 passes. , the reduction in a single pass is about 10%; after continuous rolling, intermediate annealing at 350 ° C is carried out, and the annealing time is 15 minutes, and then the aforementioned continuous cooling and rolling is repeated until the thickness of the magnesium alloy sheet reaches the required size.
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[0035] Example 3:
[0036] The AZ31 magnesium alloy hot-rolled billet with an initial thickness of 4 mm was subjected to cooling and continuous rolling. The rolling path was multi-directional rolling, and the rolling method was asynchronous rolling (different speed ratio was 1.5), and the rolling temperature was 400 °C. , the number of continuous rolling is 4 passes, and the single pass reduction is about 5%; after continuous rolling, intermediate annealing at 350 ° C is carried out, and the annealing time is 15 min, and then the aforementioned cooling and continuous rolling are repeated once to obtain the total reduction. The rolled sheet with an amount of about 40% is subjected to final annealing treatment at 250°C×1h, 300°C×1h, and 350°C×1h.
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