CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] cast iron

Posted by Smoke
on 2001-02-10 08:37:34 UTC
Jay, do you know of a source for programable controllers and high
temperature heating elements we could incorporate into home built electric
heating/melting furnaces?

I'd love to build a somewhat larger heat treating furnance and I know of
others who'd like to do this as well. In fact, I just got a post at
HomeFoundry about a guy that wants to build an elcectric furnace for
controlling temperatures on salt baths.

Smoke



>I set up heat treat furnaces for foundries. The heat profile for cast iron
can differ greatly depending on the type of cast iron,
>its thickness and geometry. The important factors are the ramp up, soak and
ramp down. Usually the temperature can ramp up rapidly
>to 600F. The ramp up is then tightly controlled at not more than a 200
degree F rise per hour until the soak temperature is reached
>. For some castings this could be 1050F or as high as 1650F, This
temperature is held for a soak cycle of two hours per inch of
>casting thickness. The casting is then slowly cooled in the ramp down cycle
at a rate of not less than 200 degrees F per hour, to
>600F. Often a fully loaded HT furnace will naturally ramp down if it is
shut down and bottled up at the end of the soak cycle.
>
>Aging castings is no where as effective as heat treating. Some castings
have an extremely tough skin that can take an edge right off
>a cutting bit. Aging won't help, but heat treating can make it cut like
butter.
>
>Hope this helps.
>
>Jay Hayes
>

Discussion Thread

Carlos Guillermo 2001-02-08 09:35:50 UTC cast iron dave engvall 2001-02-08 09:56:38 UTC Re: [CAD_CAM_EDM_DRO] cast iron Joe Vicars 2001-02-08 10:36:33 UTC Re: [CAD_CAM_EDM_DRO] cast iron ballendo@y... 2001-02-08 11:08:19 UTC Re: [CAD_CAM_EDM_DRO] cast iron Dan Mauch 2001-02-08 11:09:08 UTC Re: [CAD_CAM_EDM_DRO] cast iron Carlos Guillermo 2001-02-08 11:54:52 UTC RE: [CAD_CAM_EDM_DRO] cast iron ballendo@y... 2001-02-08 12:02:34 UTC RE: [CAD_CAM_EDM_DRO] cast iron James Owens 2001-02-08 12:57:13 UTC Re: [CAD_CAM_EDM_DRO] cast iron Alan Marconett KM6VV 2001-02-08 13:10:10 UTC Re: [CAD_CAM_EDM_DRO] cast iron ballendo@y... 2001-02-08 13:56:34 UTC Re: cast iron Carlos Guillermo 2001-02-08 14:08:17 UTC RE: [CAD_CAM_EDM_DRO] cast iron dave.schultz@s... 2001-02-08 15:37:07 UTC Re: cast iron ballendo@y... 2001-02-08 15:46:22 UTC re:Re: cast iron (stress relieving) dave.schultz@s... 2001-02-08 16:04:52 UTC re:Re: cast iron (stress relieving) dave engvall 2001-02-08 16:43:51 UTC Re: [CAD_CAM_EDM_DRO] cast iron Carlos Guillermo 2001-02-08 17:58:10 UTC RE: [CAD_CAM_EDM_DRO] cast iron Sven Peter, TAD S.A. 2001-02-08 18:40:36 UTC Re: [CAD_CAM_EDM_DRO] cast iron davemucha@j... 2001-02-08 20:19:57 UTC re:Re: cast iron (stress relieving) davemucha@j... 2001-02-08 20:23:46 UTC re:Re: cast iron (stress relieving) Smoke 2001-02-08 20:49:54 UTC Re: [CAD_CAM_EDM_DRO] cast iron Jay Hayes 2001-02-08 22:25:01 UTC Re: [CAD_CAM_EDM_DRO] cast iron ballendo@y... 2001-02-09 03:53:54 UTC Re: cast iron James Owens 2001-02-09 04:15:01 UTC Re: [CAD_CAM_EDM_DRO] Re: cast iron Carlos Guillermo 2001-02-09 06:44:34 UTC cast iron ballendo@y... 2001-02-09 12:22:14 UTC RE:re:Re: cast iron Smoke 2001-02-09 13:08:19 UTC Re: [CAD_CAM_EDM_DRO] cast iron machines@n... 2001-02-09 16:03:26 UTC Re: cast iron Smoke 2001-02-10 08:28:33 UTC Re: [CAD_CAM_EDM_DRO] Re: cast iron Smoke 2001-02-10 08:37:34 UTC Re: [CAD_CAM_EDM_DRO] cast iron dave engvall 2001-02-10 10:04:07 UTC Re: [CAD_CAM_EDM_DRO] Re: cast iron davemucha@j... 2001-02-10 14:09:17 UTC Re: cast iron James Owens 2001-02-10 14:43:58 UTC Re: [CAD_CAM_EDM_DRO] RE:re:Re: cast iron davemucha@j... 2001-02-10 18:08:39 UTC RE:re:Re: cast iron