Calguns.net  

Home My iTrader Join the NRA Donate to CGSSA Sponsors CGN Google Search
CA Semiauto Ban(AW)ID Flowchart CA Handgun Ban ID Flowchart CA Shotgun Ban ID Flowchart
Go Back   Calguns.net > INTERESTS AND ACTIVITIES > Gunsmithing & How To
Register FAQ Members List Calendar Mark Forums Read

Gunsmithing & How To Pro, Amateur & WECSOG and Tutorials, Guides & OLL Build Instructions

Reply
 
Thread Tools Display Modes
  #1  
Old 12-11-2012, 8:45 AM
ArchStanton's Avatar
ArchStanton ArchStanton is offline
Junior Member
 
Join Date: Jan 2011
Posts: 63
iTrader: 2 / 100%
Default AK74 Ejector Wear Concern

I joined the South Bay Rod and Gun club yesterday and shot just under 300 rounds of surplus 5.45 through my AK. It was a great feeling finally being able to zero my irons after building it last March at the San Diego Build party.

At home I noticed the ejector deformation and now I'm questioning my heat treatment.

http://i.imgur.com/EYMCi.jpg

Should I be concerned about this kind of wear?

Last edited by ArchStanton; 12-11-2012 at 8:48 AM..
Reply With Quote
  #2  
Old 12-11-2012, 8:58 AM
Aaron707's Avatar
Aaron707 Aaron707 is offline
Junior Member
 
Join Date: Jan 2012
Location: Fortuna, CA
Posts: 80
iTrader: 1 / 100%
Default

Yes, redo the heat treatment on the ejector.It shouldn't be wearing at all. You may have annealed it too much. I typically heat the very corner with a mapp torch and dip it in oil without the annealing step after.
Reply With Quote
  #3  
Old 12-11-2012, 9:27 AM
tujungatoes's Avatar
tujungatoes tujungatoes is offline
Calguns Addict
 
Join Date: Dec 2006
Location: LA/SFV
Posts: 7,965
iTrader: 37 / 100%
Blog Entries: 2
Default

Looks like you may have gotten it too hot on the tempering step. It's a simple fix. Just repeat the heat treating.
__________________
Quote:
Originally Posted by Dr. Elky View Post
If your a man who wears white sunglasses, your probably a douche bag
Quote:
Originally Posted by CSACANNONEER View Post
I've been know to cross dress and go the other way at certain events.
Reply With Quote
  #4  
Old 12-11-2012, 12:21 PM
Jayruta's Avatar
Jayruta Jayruta is offline
Senior Member
 
Join Date: Aug 2009
Location: Mira Mesa
Posts: 923
iTrader: 22 / 100%
Default

Bring it over tomorrow. We can redo it.
Reply With Quote
  #5  
Old 12-11-2012, 2:06 PM
ArchStanton's Avatar
ArchStanton ArchStanton is offline
Junior Member
 
Join Date: Jan 2011
Posts: 63
iTrader: 2 / 100%
Default

Thanks for the replies.

Looks like I'll be fixing it tomorrow. I'll take it to the range afterwards and see how it took.
Reply With Quote
  #6  
Old 12-11-2012, 2:26 PM
6mmintl's Avatar
6mmintl 6mmintl is offline
Veteran Member
 
Join Date: Apr 2008
Location: Free land, Star Idaho.
Posts: 4,523
iTrader: 51 / 98%
Default

Did you hit it with a file to check heat treatment? if it skips over metal it 58-60 C Scale, if it digs in with resistence its lower, if it bite into metal and files easily it is way too soft.
Reply With Quote
  #7  
Old 12-11-2012, 9:14 PM
ArchStanton's Avatar
ArchStanton ArchStanton is offline
Junior Member
 
Join Date: Jan 2011
Posts: 63
iTrader: 2 / 100%
Default

Quote:
Originally Posted by 6mmintl View Post
Did you hit it with a file to check heat treatment? if it skips over metal it 58-60 C Scale, if it digs in with resistence its lower, if it bite into metal and files easily it is way too soft.
I did not hit it with a file. Though, I will soon to re-shape the tip before heat treating again.
Reply With Quote
  #8  
Old 12-12-2012, 1:14 AM
Ryan in SD Ryan in SD is offline
Senior Member
 
Join Date: Apr 2009
Posts: 1,909
iTrader: 55 / 100%
Default

One of my builds has the same amount of wear after about the same amount of rounds.
Im curious to see how far it will go before giving me problems.
__________________
PM me for:
AK-47 receiver bending kits or CNC AK47 MagLocks
All gun control advocates are either negligently or purposefully advocating tyranny.
Reply With Quote
  #9  
Old 12-12-2012, 2:24 AM
ArchStanton's Avatar
ArchStanton ArchStanton is offline
Junior Member
 
Join Date: Jan 2011
Posts: 63
iTrader: 2 / 100%
Default

Quote:
Originally Posted by Ryan in SD View Post
One of my builds has the same amount of wear after about the same amount of rounds.
Im curious to see how far it will go before giving me problems.
I had thought about doing that as well. Seeing as I still have the spare receiver from the build party.

I'll be fixing it, though. It's my only gun at the moment.

I'd be curious to see how long before it gives you problems.
Reply With Quote
  #10  
Old 12-12-2012, 3:46 AM
Ryan in SD Ryan in SD is offline
Senior Member
 
Join Date: Apr 2009
Posts: 1,909
iTrader: 55 / 100%
Default

Ok, Ill keep running it. Ill try to remember round count.
__________________
PM me for:
AK-47 receiver bending kits or CNC AK47 MagLocks
All gun control advocates are either negligently or purposefully advocating tyranny.
Reply With Quote
  #11  
Old 12-25-2012, 12:37 PM
ArchStanton's Avatar
ArchStanton ArchStanton is offline
Junior Member
 
Join Date: Jan 2011
Posts: 63
iTrader: 2 / 100%
Default

Update:

Jayruta was able to help me weld a bead onto the ejector. After re-shaping and another heat treat, I shot another 240 rounds. This is what the ejector looks like now.

http://imgur.com/v7S77

Though not as bad as the first time, the metal is still deforming. Time for another round of heat treating?
Reply With Quote
  #12  
Old 12-25-2012, 12:45 PM
nicoroshi's Avatar
nicoroshi nicoroshi is offline
www.Buildyourownak.info
CGN Contributor - Lifetime
 
Join Date: Jan 2009
Location: Da East Bay Bro!
Posts: 3,697
iTrader: 23 / 100%
Default

From the color of that ejector you got it too hot during the anneal step.
Color should be blue grey.
Progression of colors:
Brown
Purple
Blue
Blue grey (almost silver )
STOP!
From the looks of it you're a couple steps beyond that.
Reply With Quote
  #13  
Old 12-25-2012, 6:55 PM
Jayruta's Avatar
Jayruta Jayruta is offline
Senior Member
 
Join Date: Aug 2009
Location: Mira Mesa
Posts: 923
iTrader: 22 / 100%
Default

We did Ssop at blue grey... you can come back over and try it again if u want. I say roll with and see it mushrooms more. I have a some ejectors on a few builds that have a small mushroom but still function fine after over 2000 rounds and it has never gotten worse.
Reply With Quote
  #14  
Old 12-25-2012, 9:37 PM
ArchStanton's Avatar
ArchStanton ArchStanton is offline
Junior Member
 
Join Date: Jan 2011
Posts: 63
iTrader: 2 / 100%
Default

Quote:
Originally Posted by Jayruta View Post
We did Ssop at blue grey... you can come back over and try it again if u want. I say roll with and see it mushrooms more. I have a some ejectors on a few builds that have a small mushroom but still function fine after over 2000 rounds and it has never gotten worse.
Yeah dude I was thinking that. I checked the ejector twice during that last range session. It didn't seem to get any worse.

Looks like I have to go to the range again. Not disappointed at all.
Reply With Quote
  #15  
Old 12-25-2012, 9:44 PM
69Mach1's Avatar
69Mach1 69Mach1 is offline
Super Moderator
CGN Contributor - Lifetime
 
Join Date: Jan 2006
Location: Los Angeles County
Posts: 14,867
iTrader: 397 / 100%
Default

I don't think you had a problem the first time. That "peening" is normal. My factory 5.45 rifle has an ejector that looks like that.
__________________

69Mach1
munkeeboi
TURBOELKY
antix2
WTSGDYBBR
tujungatoes
jmpgnr24K
Reply With Quote
  #16  
Old 12-25-2012, 9:50 PM
ArchStanton's Avatar
ArchStanton ArchStanton is offline
Junior Member
 
Join Date: Jan 2011
Posts: 63
iTrader: 2 / 100%
Default

Quote:
Originally Posted by 69Mach1 View Post
I don't think you had a problem the first time. That "peening" is normal. My factory 5.45 rifle has an ejector that looks like that.
Good to know! I just want to be able to take this thing to an Appleseed and not worry about it.
Reply With Quote
  #17  
Old 12-25-2012, 10:06 PM
ENTHUSIAST's Avatar
ENTHUSIAST ENTHUSIAST is online now
Veteran Member
 
Join Date: Feb 2008
Location: San Diego
Posts: 3,561
iTrader: 99 / 100%
Default

Shoot the heck out of it if you have any issues at all let me know and we can get it squared away at the next Build Party.
__________________
Quote:
America was founded by men who understood that the threat of domestic tyranny is as great as any threat from abroad. If we want to be worthy of their legacy, we must resist the rush toward ever-increasing state control of our society. Otherwise, our own government will become a greater threat to our freedoms than any foreign terrorist.

-Ron Paul
Reply With Quote
  #18  
Old 12-26-2012, 12:17 AM
Yemff's Avatar
Yemff Yemff is offline
Senior Member
 
Join Date: Nov 2010
Location: New New Mexico
Posts: 1,111
iTrader: 9 / 100%
Default

It could be a number of things. It could be that the quench was too slow(ideally less than 5s from orange to room temp), which would result in a softer steel where further tempering would yield no changes in hardness. If you are worried about it try annealing and tempering at lower temps, which may lead to quicker quenching. For the initial heat it is only necessary to heat the ejector above around 800 C (grey), but it doesn't hurt to heat up to higher temps, personally I wouldn't go above about 1000 C(orange). As far as tempering, try heating to around 300-500 C(brown/purple) , much higher than that may make you loose some hardness gained from quenching.
__________________
Charlie don't surf!

Solidworks drafting

Last edited by Yemff; 12-27-2012 at 9:51 AM..
Reply With Quote
  #19  
Old 12-26-2012, 11:47 PM
SJgunguy24's Avatar
SJgunguy24 SJgunguy24 is offline
I need a LIFE!!
 
Join Date: May 2008
Location: Northern Mexico(San Jose) Where illegals have rights and citizens get screwed
Posts: 14,856
iTrader: 18 / 100%
Default

Quote:
Originally Posted by Yemff View Post
It could be a number of things. It could be that the quench was too slow(ideally less than 5s from orange to room temp), which would result in a softer steel where further tempering would yield no changes in hardness. If you are worried about it try annealing and tempering at lower temps, which may lead to quicker quenching. For the initial heat it is only necessary to heat the ejector above around 800 C (grey), but it doesn't hurt to heat up to higher temps, personally I wouldn't go above about 1700 C(orange). As far as tempering, try heating to around 300-500 C(brown/purple) , much higher than that may make you loose some hardness gained from quenching.
You should change your temps here, 1700c is 3092f, that's molten temps there dude.
__________________
There are 3 kinds of people in this world.
The wise, learn from the mistakes of others.
The smart, learn from their own mistakes.
The others, well......they just never learn.

"Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it, almighty God! I know not what course others may take; but as for me, Give Me Liberty, Or Give Me Death!"
Patrick Henry.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT -8. The time now is 9:26 PM.




Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Proudly hosted by GeoVario the Premier 2A host.
Calguns.net, the 'Calguns' name and all associated variants and logos are ® Trademark and © Copyright 2002-2016, Calguns.net an Incorporated Company All Rights Reserved.