Mayf;
As I recall, in that article there was more concern than just the hardening
of the ends of the dry-abrasive-cut 4130 tubing. I think their worry was
also about some cracking of the ends due to the severe locallized heat of
the abrasive-cutoff. Also, there was concern about abrasive grain inclusions
in the weld.
Welding 4130N with a torch gives you a pretty good (but NOT completely)
stress-relieved joint due to the broad heat zone and slow heating/cooling
rate. TIG requires subsequent stress-relief, if I'm not mistaken-- I don't
TIG weld, so I'm not as familiar with its requirements.
Regards, Neil Tucson, AZ
-----Original Message-----
From: DrMayf [mailto:drmayf@teknett.com]
Sent: Friday, March 21, 2003 1:50 PM
To: Albaugh, Neil; 'Waldron, James'; land-speed@autox.team.net
Subject: Re: Re: Plasma Cutter or band saw or ?
Neil, all...doesn't welding of the tube end make the question of hardening
the tube by chop saw cutting, moot? Seems to me it would.. Both gas welding
and TIG welding put far more heat into the metal than the chop saw which is
localized. So what diference does it make whatyou cut 4130 with?
mayf
----- Original Message -----
From: "Albaugh, Neil" <albaugh_neil@ti.com>
To: "'Waldron, James'" <James.Waldron@CWUSA.COM>;
<land-speed@autox.team.net>
Sent: Friday, March 21, 2003 7:46 AM
Subject: RE: Re: Plasma Cutter or band saw or ?
> Jim;
>
> A chop saw (abrasive cut-off wheel) isn't recommended for cutting 4130
steel
> tubing. The heat of friction leaves the alloy in poor condition for
> about 1/8" from the cut. I read this somewhere but I can't tell you
> that
source--
> I simply can't remember where I saw it.
>
> Regards, Neil Tucson, AZ
>
>
> -----Original Message-----
> From: Waldron, James [mailto:James.Waldron@CWUSA.COM]
> Sent: Thursday, March 20, 2003 8:06 PM
> To: land-speed@autox.team.net
> Subject: RE: Re: Plasma Cutter or band saw or ?
>
>
> Thanks to all on the list who contributed their experience. It really
> made a big difference and is going to save me a lot of money.
>
> After Elon made the plasma torch sould a lot like a light saber I'm
leaning
> towards a chop saw or a portable band saw. About a factor of 10 less
> expensive. I'll just use the old cutting torch for plate and visit my
> grinder.
>
> Thanks!
> Jim W.
/// unsubscribe/change address requests to majordomo@autox.team.net or try
/// http://www.team.net/mailman/listinfo
/// Archives at http://www.team.net/archive/land-speed
/// what is needed. It isn't that difficult, folks.
|