Forging and rolling integrated manufacturing process of large-diameter ultrahigh-strength high temperature resisting magnesium alloy shell part
A preparation process and ultra-high-strength technology, which is applied in the deformation of magnesium alloys, forging deformation and ring rolling deformation of Mg-Gd-Y-Zr rare earth magnesium alloys, and can solve the problems of difficult preparation of magnesium alloy shell parts and limitation of continuous deformation, etc. problem, to achieve the effect of uniform deformation and small anisotropy
Active Publication Date: 2017-08-04
CENT SOUTH UNIV
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The invention discloses a forging and rolling integrated manufacturing process of a large-diameter ultrahigh-strength high temperature resisting magnesium alloy shell part. The manufacturing process comprises the following steps in sequence: semi-continuous electromagnetic casting; machining of an ingot blank; uniform annealing; multi-directional free forging; mechanical perforation; annular rolling; and T6 thermal treatment. The dimension of the prepared shell part is as follows: the outer diameter Phi is 600 mm to 1700 mm; the wall thickness is 35 mm to 100 mm; the height is 300 mm to 700 mm; the T6-state room-temperature tangential and height-direction tensile strength is larger than or equal to 470 MPa; the elongation rate is larger than or equal to 5%; the tangential and height-direction tensile strength at the temperature of 200 DEG C is larger than or equal to 350 MPa; and the elongation rate at the temperature of 200 DEG C is larger than or equal to 7%. A product prepared by the process disclosed by the invention has the characteristics of large size, no cracks, ultrahigh room-temperature strength, excellent heat resistance and the like, and the process disclosed by the invention can provide a qualified magnesium alloy shell part for the fields such as aeronautics and astronautics.
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