A method for crushing and spheroidizing the second phase in magnesium alloy by heating and rotating rolling

A magnesium alloy, clockwise rotation technology, applied in the field of metal material rolling processing, can solve the problems of difficulty in greatly improving the comprehensive mechanical properties of magnesium alloys, inability to mass industrial production, high production costs, etc., to promote dynamic recovery and dynamic recovery. The effect of crystallization, broadening the range of composition design, and saving energy consumption
CN110129697BActive Publication Date: 2020-05-08JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JILIN UNIV
Publication Date
2020-05-08

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Abstract

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.
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Description

technical field

[0001] The invention relates to the field of rolling processing of metal materials, in particular to a method for crushing and spheroidizing the second phase in a magnesium alloy by temperature-rising rotary rolling. Background technique

[0002] As the lightest structural material currently available, magnesium has great application value and broad prospects in light weight. The mechanical properties of magnesium alloys are closely related to the second phase, texture, grain size and other factors. Improving the shape, size and distribution of the second phase will greatly increase the tensile strength and elongation of magnesium alloys. However, as-cast magnesium alloys will inevitably produce a large number of dendrites and coarse eutectic phases, and in the composition design process of magnesium alloys, some elements will form large-sized second phases (tin, calcium, zinc, etc.) after combination, even It is also difficult to eliminate after high temper...

Claims

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