On Feb 13, 2012, at 9:29 AM, Viesturs Lācis wrote: > I have a question about steel hardening (I really hope that this is the > correct word in English to describe that process), when plasma-cutting a > material that is submerged in water. How much does it really occur and > how much difficulties with post-processing the parts (on mill etc) > does it really make? And does the decreased deformation of material > due to enhanced cooling by the liquid really offset the problems from > steel hardening?
I will defer to an expert. I don't know the answers to these questions, though they are interesting ones. I do know that the water cools the cut instantaneously. Or more accurately, I should say that if the part is sitting at or just below the surface, when you cut you can touch the part immediately after the cut and it will be cool to the touch. > Does such a partial submerging in water help with reducing smoke and > fumes from the cutting zone? I have read that full submerging in water > helps a lot on this issue. You don't even need to partially submerge. Just having the part above the water helps immensely. Before we had the water pan we were limiting cuts because the fine dust that is created spreads throughout the room. A few cuts and everything in the room was covered in a fine black powder. My Macbook has magnetic latches in the screen and had small piles of filings stuck to the those magnets. With the water table, even above the water, as far as I can tell nearly all of the dust is eliminated. There is still some I am sure that comes from the top of the part, sparks will fly off the top to a minor extent, but the fine dust does not appear that I have been able to tell. And if the part is just below the surface (even just on the edge of above and below) you have very few sparks from the top. Tom ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
