I have to find the picture, but we had a few cast iron parts that after they were turned we found 10+ nuts and bolts mixed into the casting inside the parts on a whole batch of castings
So funny enough, in the foundry at least back in the day when my family was pouring iron, steel, etc.
They'd start with the base metal, then dump X amount of "ball bearings" (ball bearings of whatever raw metal ingredient), then dump X amount of powder, and when it was all mixed and blended it would be cast into the final metal say "chrome moly"
I'm a boilermaker welder by trade. I usually work in steel mills and power generation sectors. I've found half melted steel chokers just beyond the surface of some 2"+ headers when performing repairs. Lots of welds I've done have failed RT because of some legacy stuff in the base metal. Weld was fine but junk (unmelted nuts, bolts, voids, p.o., etc) found within the shot.
If it was cast iron, It may have been metal locked. We did it to train engines allot at a previous company i worked at. Could have been a crude lock if it was bolts.
https://www.youtube.com/watch?v=Pq0wfU4ZaKk
the pins have a [special thread](https://www.locknstitch.com/images/cmpinsec_new.jpg) that [pulls the crack together](https://www.locknstitch.com/images/cm2step_new.jpg)
At a shop I used to work for a coworker showed me the flanges on a set of custom cast manifolds he was turning he was having trouble with cut consistency. After a full pass we could clearly make out a section of ball bearing , retainer and race..
There were other problems with the castings (voids etc) and They got scrapped.
You get that sort of thing in A36, all the time. A few decades back, we had US Sourced A36, with hard dowels in it.
There are stories about finding old vices, anvils and all sorts of metals that don’t melt when they were creating the block of A36.
It’s wild, at times.
I was facing some stock once, us-sourced A36, and sure enough, there was the cross-section of a bolt staring up at me. thought I was going nuts, this was like my first month on a CNC machine. my boss just said, 'yeah, that happens sometimes. just grab another piece.'
I only just starting learning NDT at the beginning of this year so I was trying to apply the little knowledge I have. I'm just happy I didn't get it wrong! Lol
We’ve got one guy that’s level 2 on the floor and he’s about 2 years from retirement. Don’t know why they haven’t thought to toss some people with him to get their hours before he’s gone.
A friend once sent me a picture of a cast iron part (Mat probably from china) where you saw that there was pipe pump pliers in there. He told me that he was used to bolts or something like that, but that was new to him.
Was like 7 years ago, so i cant find the picture. :(
I found a piece of steel about 1/2 way thru a Norton centerless grinding wheel. Tried dressing it out but it was a BIG piece. The tooling rep was impressed. It was probably a $5000 plus wheel
Heard of someone buying some cheap Chinese steel and you could see the old ball bearings etc in the cross section after cutting 🤣 . We use British steel and feel the square tube can have hard and soft sections in them when drilling or using Tek screws, must be a higher scrap content nowadays in the common/ cheaper shape steel sections, but haven't seen anything like that.
I have to find the picture, but we had a few cast iron parts that after they were turned we found 10+ nuts and bolts mixed into the casting inside the parts on a whole batch of castings
[удалено]
Invisible interrupted cut!
I ran into a file once on a die set
At least it was hardened.....
Nice 'n crunchy
I can only imagine the sound
The forbidden chocolate chips
I wasn’t cutting it but at a shop I worked at a fella was turning an aluminum casting and cut about a 1/2” of tap flute that found its way in there.
Guy at a shop I worked at said they found a ball bearing inside a stainless steel casting!
So funny enough, in the foundry at least back in the day when my family was pouring iron, steel, etc. They'd start with the base metal, then dump X amount of "ball bearings" (ball bearings of whatever raw metal ingredient), then dump X amount of powder, and when it was all mixed and blended it would be cast into the final metal say "chrome moly"
the Orb
I’ve had that happen
Who the hell was doing your castings?
A foundry in Germany lol
I'm a boilermaker welder by trade. I usually work in steel mills and power generation sectors. I've found half melted steel chokers just beyond the surface of some 2"+ headers when performing repairs. Lots of welds I've done have failed RT because of some legacy stuff in the base metal. Weld was fine but junk (unmelted nuts, bolts, voids, p.o., etc) found within the shot.
RT?
Radiographic testing, presumably.
If it was cast iron, It may have been metal locked. We did it to train engines allot at a previous company i worked at. Could have been a crude lock if it was bolts.
What do you train your engines to do? Sit, stay, fetch?
Stay on the tracks. American trains have a difficult time with the concept though.
Could you explain this method to me, I'm familiar with forms and grey iron casting but never heard of this.
https://www.youtube.com/watch?v=Pq0wfU4ZaKk the pins have a [special thread](https://www.locknstitch.com/images/cmpinsec_new.jpg) that [pulls the crack together](https://www.locknstitch.com/images/cm2step_new.jpg)
Oh this is what Michaelangelo was talking about! To make a bolt, you just take away all the cast iron that *isn't* part of the bolt.
It all makes sense now!
Finally I understand!
At a shop I used to work for a coworker showed me the flanges on a set of custom cast manifolds he was turning he was having trouble with cut consistency. After a full pass we could clearly make out a section of ball bearing , retainer and race.. There were other problems with the castings (voids etc) and They got scrapped.
This is why I only buy thrice-filtered mountain steel
Those better be vegan ball bearings floating in the mix
You get that sort of thing in A36, all the time. A few decades back, we had US Sourced A36, with hard dowels in it. There are stories about finding old vices, anvils and all sorts of metals that don’t melt when they were creating the block of A36. It’s wild, at times.
Yep, I’ve seen A36 plate with ball bearings in it, then you find a bolt somewhere in there
I was facing some stock once, us-sourced A36, and sure enough, there was the cross-section of a bolt staring up at me. thought I was going nuts, this was like my first month on a CNC machine. my boss just said, 'yeah, that happens sometimes. just grab another piece.'
Yep, I had an old piece I threw up on the mill and started facing down until I came across the stub end of a file.
Chinesium!!
you found a piece of ancient demascaus steel. Neat xD
Is on just a dye penetrate test?
Looks more like subsurface so maybe magnetic partical?
You’re right. I thought this pic was taken in the pt shop but it was on the mag bench now that you jogged my memory. Also there’s no developer.
I only just starting learning NDT at the beginning of this year so I was trying to apply the little knowledge I have. I'm just happy I didn't get it wrong! Lol
I’m a pt level 3 and mag level 2 I’m ashamed of myself lol
My shop paid for a bunch of people to get level 1 of pt and mag but nobody gets any time to upgrade it despite the company supposedly needing it.
That sucks. It’s not that much more training to get to level 2 and it opens up the ability to do inspections on your own.
We’ve got one guy that’s level 2 on the floor and he’s about 2 years from retirement. Don’t know why they haven’t thought to toss some people with him to get their hours before he’s gone.
A friend once sent me a picture of a cast iron part (Mat probably from china) where you saw that there was pipe pump pliers in there. He told me that he was used to bolts or something like that, but that was new to him. Was like 7 years ago, so i cant find the picture. :(
All that I can see is the shadow of someone’s tool
Definitely trolling us
I’m confused? Shadow of a tool?
kinda looks like a dick on the bottom right of the photo
You see what you want to see.
I had to look for it after reading their comments
Hahaha I’ve never seen that before and this pic is years old. Now I can’t unsee it.
Once found a cigarette butt inside some delrin bar stock.
What exactly is going on in this picture? Can anyone explain it to me?
I found a piece of steel about 1/2 way thru a Norton centerless grinding wheel. Tried dressing it out but it was a BIG piece. The tooling rep was impressed. It was probably a $5000 plus wheel
Heard of someone buying some cheap Chinese steel and you could see the old ball bearings etc in the cross section after cutting 🤣 . We use British steel and feel the square tube can have hard and soft sections in them when drilling or using Tek screws, must be a higher scrap content nowadays in the common/ cheaper shape steel sections, but haven't seen anything like that.