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Cast iron weld Strength

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Greaser007 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Greaser007 Quote  Post ReplyReply Direct Link To This Post Topic: Cast iron weld Strength
    Posted: 09 Oct. 2019 at 2:16am
   You guys have to see this YouTube video !!

https://www.youtube.com/watch?v=zggrKXRPkyI

   I must say I have not yet tried this method, but I am going to soon, for sure.
This video was quite impressive for using 7018 electrode with flux removed.
My 91 year old father was just telling me that 50-years ago, some of the best local welder's said they had their best luck welding cast iron with cast iron electrodes plain with no-flux.    kinda interesting what methods may work for the task at hand.

   I was impressed with the way the guy bent the bar stock and the weld held.
Pretty convincing really, so i'm gonna try it next year, 2020, or before.

   I have a cracked water jacket on a GPW engine block. I am old-school and grew up in an engine machine shop as a kid. I grew up with old-school mechanics, blacksmiths and welder / machinists. Just like them, I have established habits or techniques for working metal. My dad's father was a blacksmith in the '20's.   So, where I am going with this is: I would like to weld the GPW block with a narrow V-groove using Harris NI99 nickel electrode.

   Now that I have been playing with this cast iron welding, I am now up for another challenge. From my experience, I just cannot be convinced that a 3-inch long horizontal crack running about 1-1/4" below the block deck will hold sufficiently with the torqueing of the head bolts if using Pinning.
UNLESS using the perpendicular Locks offered by LocknStitch in Turlock, Calif.

Here is a link to Pinning: (this is what I would consider if pinning)
http://www.locknstitch.com/cast-iron-repair-videos-tutorials.html
https://www.youtube.com/watch?v=FIKY--USk7Y
http://castingrepair.locknstitch.com/category/crack-repair-tools-supplieshttp://castingrepair.locknstitch.com/viewitems/l10-l15-5-locks/l15-5-locks

I do like their Locks that install perpendicular to the crack.
I could V-groove my own weld lock grooves perpendicular and fill with nickel.
Just today, I met an 86-year old engine machinist moving his shop. I will meet with him soon and pick his brain about his luck with pinning, before I do the nickel welding.   LocknStitch looks like a worthy product.
The L15 Lock which is .70" long may just be the ticket with 3 of these installed along the 3-1/2" long crack in the water jacket.
Norman Seppenfield pointed out to me after looking at this crack that he would pin it, but I didn't ask if he would use LocknStitch.
   I have watched old-school pins installed, but not LocknStitch.

   After some experimentation using the 7018 electrode with flux removed, I just might want to consider it over the Harris nickel rod.
   ( haha, I had a full bucket of grain for breakfast ). _ _ just teasing. :)

    
Anyone wish to chime in with comments ?


    Enjoy the links from LocknStitch !

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drm101 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote drm101 Quote  Post ReplyReply Direct Link To This Post Posted: 10 Oct. 2019 at 1:51pm
Jay Leno has a few videos where the used the Locknstitch to fix blocks. They seem to like it. 
Dean
'47 CJ2A "Hard Target"
The Less the Power the More the Force
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Greaser007 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Greaser007 Quote  Post ReplyReply Direct Link To This Post Posted: 17 hours 23 minutes ago at 1:45pm
   I just cannot digest the concept of a single row of pins holding together a 3-1/2-inch long crack which is under Tension from the torque of head-studs pulling, without using the perpendicular Lock to prevent tensional failure.

   So, with the same theory as the LocknStitch "Locks", I have determined that I can weld the 3-1/2-inch long crack in stitches of 3/4-inch increments using Harris NI-99 electrode, after first V-grooving the crack. Then when completed, I will mark-off 3 locations to grind a perpendicular groove to the crack just welded with the new groove breaching 5/8-inch each side of the first long repair. In essence, I will be creating my own "Lock" with a weld bead.

Simple-Simon right !!

The tensional strength of the perpendicular nickel rod weld bead may just equal or exceed that of the LocknStitch "L10" or L15" Lock.    Yep, by-cracky

   Has anyone tried this method of home-made weld-Locks ?
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