My ladle pre-heat trick fixed our cold shut issues

Honestly, we were struggling with cold shuts in our iron castings for weeks. Tbh, it was causing a lot of scrap and slowing down production. I noticed the metal was cooling too fast during the pour, so I started pre-heating the ladle before each use. Ngl, it took a bit of extra time, but the castings came out much better. Last batch, we had zero defects after I made this change. Has anyone else tried this? I'm curious if other foundries have similar fixes.

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harper2056mo ago

Cold shuts are that common? We just pour at normal temp and our castings come out fine.

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the_kai4mo ago

Laughing at myself here - ive ruined plenty of casts by being too lazy to check temps.

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black.kevin6mo ago

That foundry over on Third Street had the same attitude as @harper205, until their "normal temp" dropped ten degrees over a week. Suddenly every other plate had a hairline fracture nobody caught until machining. It's wild how much small changes in routine can mess things up without anyone noticing.

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