Stray grains

Baffles fixed to the shell even out the temperature field during single-crystal withdrawal

An SJTU application: ceramic-fibre plates at critical levels of the mould block vertical radiation and reduce front tilt. Lower freckle and stray-grain tendency is claimed.

CN121715541A · Shanghai Jiao Tong University · 6 min read

SolidificationPaper

The seed-to-mould gap as a source of stray grains at the base of a single crystal

Molten metal from the seed runs into the gap and freezes as a chilled layer. With a 0.3 mm gap the casting stays single-crystal; with 1.0 mm, stray grains grow out of the layer.

Metals · 2026 · 7 min read