Method for preparing semi-solid blank material by using liquides line die stamping process
A semi-solid, liquidus technology, applied in wire processing, metal rolling, application, etc., can solve the problems of blank specification limitation, inability to directly form parts, etc., and achieve the effects of stable quality, low cost and simple process
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Embodiment 1
[0019] LD10 bar semi-solid forming
[0020] Bar specification: φ120×250mm
[0021] Organization: Primary grain size 0.2 ≥380Mpa, б b ≥480Mpa,
[0022] б≥10%
[0023] Process parameters: mold temperature>400℃, specific pressure>100MPa
[0024] Holding time: 60sec, pouring temperature 641℃
[0025] Lubrication: Oil Colloidal Graphite
Embodiment 2
[0027] AlSi 17 Semi-solid Forming of Pistons for Mg Miniature Automobiles
[0028] 1) Make a billet φ62×125 by imitating Example 1, and its process parameters: mold temperature > 400°C, specific pressure > 100MPa, pressure holding time 40sec, pouring temperature 620°C, lubrication: colloidal graphite;
[0029] 2) Cut into φ62×40;
[0030] 3) Thixotropic forming: mold temperature > 300°C, specific pressure > 100MPa, holding pressure 20sec, semi-solid billet secondary heating temperature 580°C;
[0031] 4) Mechanical properties: in CS state: б b ≥270Mpa, б 0.2 ≥2%
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