Cast iron weld Strength |
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Greaser007
Member Joined: 16 Jan. 2018 Location: Anderson, Calif Status: Offline Points: 850 |
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Posted: 09 Oct. 2019 at 7:16am |
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
Member Joined: 12 Dec. 2012 Location: Clarkston, MI Status: Offline Points: 1468 |
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Jay Leno has a few videos where the used the Locknstitch to fix blocks. They seem to like it.
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Dean
'47 CJ2A "Mud Hen" The less the Power the More the Force |
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Greaser007
Member Joined: 16 Jan. 2018 Location: Anderson, Calif Status: Offline Points: 850 |
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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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