25-07-2023 дата публикации
Номер: CN116475374A
Принадлежит:
The invention discloses a semi-solid thixotropic die-casting forming method for narrow solid-liquid two-phase region alloy, which comprises the following steps of: 1, adding the narrow solid-liquid two-phase region alloy into heating equipment, heating to an overheating temperature, and standing and cooling for a certain time after the narrow solid-liquid two-phase region alloy is completely melted, so as to obtain an alloy blank with an as-cast structure; secondly, the alloy blank is added into extrusion equipment to be subjected to cold extrusion, and the alloy blank containing a high-density dislocation and lattice distortion structure is obtained; thirdly, the alloy blank is heated for the first time, the heating temperature is set between the recrystallization temperature and the solidus temperature of the alloy, isothermal heat treatment is conducted, and fine and uniform recrystallization grains are obtained; fourthly, the alloy blank is heated for the second time, the temperature ...
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