Method for prolonging long-time service life of magnesium alloy through drying
A service life and magnesium alloy technology, which is applied in the field of non-ferrous metal material processing, can solve the problems of long aging treatment time, increased magnesium alloy density, and reduced production efficiency, so as to improve service life, increase yield strength, and increase production efficiency. Effect
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Embodiment 1
[0023] In this embodiment, the raw material is Mg-0.6Ca-0.9Zn ingot (mass percentage), the Ca / Zn mass ratio is 0.67, and a plate with a thickness of 15 mm is obtained by hot rolling. After solution treatment, the plate was pre-deformed at room temperature with a true strain of 0.03, then baked at 220°C for 60 minutes, and quenched in water. The compression performance test is carried out on the baked sample at 200°C to obtain its yield strength; the compression fatigue and creep performance tests are respectively carried out under the preset service conditions of 200°C and 100MPa, and the number and time of fracture are respectively recorded For fatigue and creep life, and compared with the samples without baking treatment, the results are shown in Table 1.
[0024] Table 1
[0025]
[0026] It can be seen from Table 1 that the compressive yield strength of the baked magnesium alloy is 130MPa at 200°C, which is about 53.8% higher than that of the unbaked sample of 90MPa. ...
Embodiment 2
[0028] In this embodiment, the raw material is Mg-0.2Ca-0.2Zn ingot (mass percentage), the Ca / Zn mass ratio is 1, and a plate with a thickness of 2 mm is obtained by hot extrusion. After solution treatment, the plate is pre-deformed at room temperature with a true strain of 0.07, then baked at 150°C for 120 minutes, and quenched in water. The tensile properties of the baked samples were tested at room temperature to obtain their yield strength. Tensile fatigue performance test is carried out under the preset room temperature and service conditions of 80MPa, and the number of times when fracture occurs is recorded as the fatigue life; tensile creep performance test is carried out at a preset temperature of 300°C and 30MPa, and the time when fracture occurs is recorded is the creep life. And compared with the sample without baking treatment, the results are shown in Table 2.
[0029] Table 2
[0030]
[0031] It can be seen from Table 2 that the tensile yield strength of t...
Embodiment 3
[0033] In this embodiment, the raw material is Mg-0.65Ca-0.6Si ingot (mass percentage), the Ca / Zn mass ratio is 1.08, and hot rolling is used to obtain a plate with a thickness of 20 mm. After solution treatment, the plate is pre-deformed at room temperature with a true strain of 0.02, then baked at 220°C for 30 minutes, and quenched in water. The compressive performance test was carried out on the baked samples at room temperature to obtain their yield strength. The compression fatigue performance test is carried out under the preset room temperature and 100MPa service conditions, and the number of times when the fracture occurs is recorded as the fatigue life; the compression creep performance test is carried out at the preset 220°C and 100MPa, and the time when the fracture occurs is recorded as the creep Change life. And compared with the sample without baking treatment, the results are shown in Table 3.
[0034] table 3
[0035]
[0036] It can be seen from Table 3 ...
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