... I don't, but depending on what you are pouring, steel wool can work great. Cheap and readily available. Best, Jeshua Lacock Founder/Engineer 3DTOPO...
41714
Jeshua Lacock
jeshuala
Feb 16, 2012 4:05 am
... Another idea is volcanic/lava rock. They are quite porous and sell big bags at Home Depot. Not sure if the pores are large enough, but I have seen quite...
41715
Rupert
rwenig2
Feb 16, 2012 4:27 am
Hello Doug, Check this site out <http://www.mgstevens.com/filters.html>. Might be what your looking for. I've used the mica filters with good success. Rupert ...
41716
postello@...
dpostellon
Feb 16, 2012 12:29 pm
Sometimes they are available at www.sciplus.org, but I haven't seen them recently. Scott Walker; Wisconsin; Madison; Maddow the collective bargaining situation...
41717
Scott Trostel
blwloco
Feb 16, 2012 1:07 pm
What does this mean? ________________________________ From: "postello@..." <postello@...> Scott Walker; Wisconsin; Madison; Maddow the collective...
41718
Dieter's Mail
hornbymagic
Feb 16, 2012 3:39 pm
There is a new wave of spammers on the prowl. They have hit other groups already. I am glad You are on the alert. ... From: rwenig2 To:...
41719
Lyle
creepinogie
Feb 17, 2012 4:33 pm
OK, I'll bite. What metal does steel wool work great for when pouring thruogh? Have you ever done it? LL...
41720
Jeshua Lacock
jeshuala
Feb 17, 2012 5:11 pm
... I have used it for both aluminum and cast iron. I didn't specify this but I have only used the course type. Note they also make copper wool too if you were...
41721
Jeshua Lacock
jeshuala
Feb 17, 2012 5:18 pm
... One correction, I was thinking it was called steel wool, but what I meant was "steel scouring pads". They are also available in copper and aluminum. Best, ...
41722
Pierre Coueffin
darkblood_
Feb 17, 2012 9:51 pm
That makes sense... I was trying to figure out how you keep the steel wool from bursting into flames... I use the stuff for tinder when camping sometimes. I...
41723
Jeshua Lacock
jeshuala
Feb 17, 2012 9:52 pm
... Correct. Though, I don't think aluminum would be nearly hot enough to ignite steel wool. I guess it would need to be about 3,000 degrees first. Best, ...
41724
stan campbell
stan2778
Feb 18, 2012 2:48 pm
you can light fine steel wool with a match or cigarette lighter, its, neat, a fast oxidation, rust! not much left. STAN www.toolfools.com/forum [Non-text...
41725
Lyle
creepinogie
Feb 18, 2012 4:21 pm
And brass or bronze will dissolve it almost instantaneously. I'd really like some photos. LL...
41726
Jeshua Lacock
jeshuala
Feb 18, 2012 6:54 pm
... Yup, or a touch of a 9-volt battery. Best, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated <http://3DTOPO.com> Phone: 208.462.4171...
41727
Jeshua Lacock
jeshuala
Feb 18, 2012 7:02 pm
... See photos of what? 1. I corrected myself, I meant scouring pads *not* fine steel wool. 2. I have never used a steel scouring pad or steel wool with brass...
41728
postello@...
dpostellon
Feb 18, 2012 8:58 pm
It might dissolve the fine steel wool. Dan P. Scott Walker; Wisconsin; Madison; Maddow the collective bargaining situation in Wisconsin...
41729
Jeshua Lacock
jeshuala
Feb 18, 2012 9:09 pm
... It certainly might. Again, I never meant to say steel wool, I meant to say steel scouring pads. They are very similar and was easily mislabeled. Best, ...
41730
rogers92026
Feb 20, 2012 6:18 pm
Hi Folks, About a month ago I posted a question about heat treating aluminum. I had cast some parts out of "wheelium"; (I guess something like A356) and it was...
41731
David Knaack
davek4096
Feb 20, 2012 7:29 pm
Thanks for posting a follow-up! After the 400F baking, how did you cool it? Does the cooling rate from there affect machining characteristic? ... [Non-text...
41732
Lyle
creepinogie
Feb 21, 2012 12:18 am
Ok, that's what I figured....
41733
Lyle
creepinogie
Feb 21, 2012 12:25 am
I'm guessing your porosity isn't hydrogen. I think if you get as fast as heat possible possibly even pre-heating the furnace if it's slow one, and pouring as...
41734
Jeshua Lacock
jeshuala
Feb 21, 2012 12:57 am
... What did you figure? You are talking about something that I used the wrong word for what I meant - after I already corrected myself on the issue. But you...
41735
stinson_voyager
Feb 26, 2012 3:36 pm
+1 on what Kyle said. The biggest cause of pinhole porosity in metal melted in electric, Natural Gas or Propane furnaces is getting the metal too hot. Large...
41736
Evan Daniel
evan.daniel...
Feb 26, 2012 6:03 pm
What temperature do you typically pour at? I usually pour somewhere around 700-750 C, and have a very small amount of pinhole porosity. I might try pouring...
41737
Dan Brewer
danqualman
Feb 27, 2012 4:18 am
Try putting a small chunk of charcoal brickett on the melt as you add metal This will keep some of the atmosphere neutral and displace the hydrogen. Carbon...
41738
ferrman1001
Feb 27, 2012 5:36 am
To Dave Patterson and to anyone else interested I decided to get my homemade cast iron professionally analysed. So what is the difference between steel and...
41739
Lyle
creepinogie
Feb 27, 2012 3:01 pm
One thing that happens to me once I get everything melted is the top of the melt swirls from the air blast. This swirling constantly breaks the top surface...
41740
Evan Daniel
evan.daniel...
Feb 27, 2012 4:18 pm
... Almost certainly some, probably not a lot. You should normally run a slightly reducing atmosphere, AIUI. The reducing component will be a mix of CO and...
41741
tmoranwms
Feb 27, 2012 4:26 pm
I've never seen swirling in the melt in a crucible furnace before, but I don't know what yours looks like. FYI, the oxide surface is a cover but it is NOT a...
41742
David Patterson
odd_kins
Feb 27, 2012 11:11 pm
Looks like you hit it pretty close. http://www.matweb.com/search/datasheet.aspx?matguid=ec56a89f37f74e2f867a64b0f87f1e9d&ckck=1 nicely done. Dave Patterson ...
