Mr. Firdaus,
Cast Iron repair could be done in 2 ways.
1. Hot welding.
Preheat the repair area to 400/450 deg.C and maintain inter pass temp. of min. 300 deg. on an average.
Drill 2 holes on either side of a crack (if any) to arrest their further progression.
You can use E St (SFA 5.15) / E 7018 / E 8018 G - size 3.20 / 4.00 size after grinding and removing the said defects.
Peen each and every layer of weld after its completion using ball point hammer to avoid stress concentration.
Wrap with dry sand, asbestos cloth to avoid fast cooling rate.
The welds are non machinable. Could be ground to get a finish. good for machinery (lathe, milling etc) beds where
dimensional accuracy is not an issue. Process is economical.
2. Cold welding.
Preheat the repair area to 100/150 deg.C to remove any oil,grease stains.
Drill 2 holes on either side of a crack (if any) to arrest their further progression.
You have to use E Ni-Cu B -Monel core with 70 Ni & 30 Cu (or) E Ni-Cl with 98 Ni & 2 Fe (or) E Ni-Fe-Cl with 55 Ni & 45 Fe
size 3.20/4.00 after grinding and removing the defects. DP check if possible.
Peen each and every layer of weld after its completion using ball point hammer to avoid stress concentration.
The welds are machinable with carbide tipped tools (or) could be ground to get a finish.
Good for machinery bases, work out surfaces, correcting machining errors,joining CI to Steel etc. where dimensional accuracy
Cast Iron repair could be done in 2 ways.
1. Hot welding.
Preheat the repair area to 400/450 deg.C and maintain inter pass temp. of min. 300 deg. on an average.
Drill 2 holes on either side of a crack (if any) to arrest their further progression.
You can use E St (SFA 5.15) / E 7018 / E 8018 G - size 3.20 / 4.00 size after grinding and removing the said defects.
Peen each and every layer of weld after its completion using ball point hammer to avoid stress concentration.
Wrap with dry sand, asbestos cloth to avoid fast cooling rate.
The welds are non machinable. Could be ground to get a finish. good for machinery (lathe, milling etc) beds where
dimensional accuracy is not an issue. Process is economical.
2. Cold welding.
Preheat the repair area to 100/150 deg.C to remove any oil,grease stains.
Drill 2 holes on either side of a crack (if any) to arrest their further progression.
You have to use E Ni-Cu B -Monel core with 70 Ni & 30 Cu (or) E Ni-Cl with 98 Ni & 2 Fe (or) E Ni-Fe-Cl with 55 Ni & 45 Fe
size 3.20/4.00 after grinding and removing the defects. DP check if possible.
Peen each and every layer of weld after its completion using ball point hammer to avoid stress concentration.
The welds are machinable with carbide tipped tools (or) could be ground to get a finish.
Good for machinery bases, work out surfaces, correcting machining errors,joining CI to Steel etc. where dimensional accuracy
is needed. Process is economical.
Sridhar.
Sridhar.
---------------------------------------------------------------------------------------------------------------------------------------------------------
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Dudy Firdaus
Sent: Sunday, December 23, 2012 1:50 AM
To: materials-welding@googlegroups.com
Subject: [MW:16305] Welding for cast iron repair
Dear Experts,
Could you share me the best experiences regarding with welding for cast iron repair?
What in best process of welding and spec of the electrodes?
Highly appreciated for your help.
Thanks.
Kind Regards,
Dudy Firdaus
m: +62 85859020475 ; +62 81217149000
e: dudy.pfirdaus@yahoo.com.au
www.linkedin.com/pub/dudy-firdaus/1a/44/558
Sent from my Private BlackBerry®
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