|
#1
|
|||
|
|||
Welding a carrier floor
I have a carrier floor which I hope to repair by welding a strip from one end to the other.
Dose anybody have some proven advise? Has any one here done it before? If I use a mild steel patch will it weld to the floor? can I Mig it, or should I stick weld it with stainless rods ( I have a Mig and an Arc)
__________________
Bluebell Carrier Armoured O.P. No1 Mk3 W. T84991 Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6. Dodge WC55. 37mm Gun Motor Carriage M6 Jeep Mb #135668 So many questions.... |
#2
|
|||
|
|||
Mild steel and normal MIG wire will work fine but weld in short runs well spaced apart to keep the heat down.
Also don't be tempted to use thinner steel than the original. If you operate the carrier you will scrape its belly on something sooner or later and if the something is solid it can put a huge force on the belly plate and dent it. David |
#3
|
||||
|
||||
UK, Can, Aus or NZ production?
I know the steel used in the Australian LP Carriers is a local alloy (ABP3) that has very different composition and heat treating to, say, the UK Armour Plate, and as a result the technique and materials (and the quality of the end result) will differ. I believe the NZ steel is also similar to Aus ABP3, and Canadian steel is closer to UK Plate, but may well be different due to the wartime availability of raw materials and production techniques. But maybe you're working on an NZ LP1 (NZR 6, 21 or 29?? ), which were just Mild Steel and any welding technique will work!
__________________
You can help Keep Mapleleafup Up! See Here how you can help, and why you should! |
#4
|
|||
|
|||
Welding Technique
Lynn, use mild steel solid core 0.9mm wire with CO2 shielding. This is the most cost effective and best results with no cracking. It will weld any of the armour from any country, and yes use techniques that dissipate the heat from the weld zone, as David has eluded to. One technique is "backstep" welding, where you stop your run from where you last started it , if that makes sense, as it does not allowe heat to keep transferring along the direction of weld. Also use veeing the steel as well for penetration, and gap depending on thickness for sound welds, Cheers Andrew.
__________________
Valentine MkV Covenanter MkIV Lynx MKI and MKII Loyd Carrier / English / Candian / LP. M3 Stuart |
#5
|
|||
|
|||
From the Manual ...
Lynn,
Instructions from the Aust Carrier Workshop Manual for ABP-3 plate repairs. Mike |
#6
|
|||
|
|||
Thank you guys. I will try to follow your accumulated advice. This floor is from a Canadian hull. It is 3mm thick.
As an aside, the NZ Bren has a new floor made from Corten. I am not working on that. When i tried to weld the div plate from the NZ Bren, it kept cracking, when I used the mig. That was "mild steel" (nothing like mild!) from the ship "Bowen" built in 1901. I ended up using the stick welder, and I can't remember which rods. Anyhow I'm guessing others have patched a Canadian carrier floor.
__________________
Bluebell Carrier Armoured O.P. No1 Mk3 W. T84991 Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6. Dodge WC55. 37mm Gun Motor Carriage M6 Jeep Mb #135668 So many questions.... |
#7
|
|||
|
|||
Hi Lynn, I used basic rods 7016 on my British carrier with pretty good results. No preheating, armoured plates to mild steel.
I was surprised how easy it went.
__________________
UCw Mk.III |
#8
|
|||
|
|||
3 MM thick?
Quote:
Hi Lynn 3 MM seems thin, check my math guys that would be .11811 inches thick that's less than 1/8 of an inch. Floor plates in CMP cab are thicker than that. I've welded 1/4 inch diamond plate very successfully with Mig welder using CO2 or CO2-Argon with a 110 volt machine. As suggested weld in short sections to prevent warping. If you can find an old brass kick plate I have had very very good luck using them as a heat sink behind the weld to prevent warping. Brass or copper are good because the weld won't stick to them. If you don't have brass plate I've been using scrap copper pipe just slit it and flatten it out. Another good heat sink trick is wet toilet paper scrunch up and stuck to the steel about an inch from weld. Before and after pictures of the repair would be interesting. Cheers Phil
__________________
Phil Waterman `41 C60L Pattern 12 `42 C60S Radio Pattern 13 `45 HUP http://canadianmilitarypattern.com/ New e-mail Philip@canadianmilitarypattern.com |
#9
|
|||
|
|||
I agree with all of Phill's comments but copper works much better than brass because of its higher melting point.
I must admit I thought carrier floor was 6mm but have never cut into it to see. David |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Tailgate welding. | Jordan Baker | The Softskin Forum | 4 | 16-04-17 06:01 |
Carrier petrol tank floor cleats fixing ? | RichardT10829 | The Carrier Forum | 3 | 21-02-12 00:59 |
all about welding | Phil Waterman | The Restoration Forum | 16 | 30-04-11 00:57 |
WW2 welding trailers | Ryan | The Softskin Forum | 4 | 26-05-10 06:17 |
Welding/machining help please | Bruce Parker (RIP) | The Restoration Forum | 22 | 04-10-05 23:34 |