- Joined
- Nov 26, 2001
- Messages
- 1,375
I'm quite a newbie in the topic of the smith job. But I'm no idiot as well.
I Have a precise notion of what a good weld must be, having worked in the electronic hardware sector for many years.
Weld with tin alloy, weld with silver, braze or do autogenous welding, a weld is always a weld and must have the same characteristics to be a good one.
So.
I can weld and braze decently if not well. I tried to weld steel to steel using iron welding rods in all manners.
No way.
First attempt was with a dual gas rig with oxygen and a propane-butane-propylene-acetilene mixture from Rohtenberger.
No way.
The flame is too cold. I can make it hot enough to melt the material, but to do so I have to dial up the oxygen tap so much that the welding rig becomes, actually, a cutting rig. The whole molten mass oxidizes, becomes porous and, although the weld seems ok initially, as it cools you can see it's all scale and porous. A single light tap with a hammer is all that's needed to make the whole thing come apart.
The mixture is the only one I could find in small cans.
I have no room for a full-sized acetilene torch, nor would it be wise to store such huge gas cans in my attic!
So I went and asked for small cans of acetilene and the guy gave me this can, it's called "Novacet" from Walkover.
Still, I couldn't make a decent weld.
I tested it trying to weld two nails together.
No way.
I tuned the flame so that the plume just disappeared, but anyway I got a mess. Leave some plume and the welding rod will not melt.
Somebody knows wich mixture is "novacet"?
Why I can't get a decent weld?
What I'm doing wrong?
I Have a precise notion of what a good weld must be, having worked in the electronic hardware sector for many years.
Weld with tin alloy, weld with silver, braze or do autogenous welding, a weld is always a weld and must have the same characteristics to be a good one.
So.
I can weld and braze decently if not well. I tried to weld steel to steel using iron welding rods in all manners.
No way.
First attempt was with a dual gas rig with oxygen and a propane-butane-propylene-acetilene mixture from Rohtenberger.
No way.
The flame is too cold. I can make it hot enough to melt the material, but to do so I have to dial up the oxygen tap so much that the welding rig becomes, actually, a cutting rig. The whole molten mass oxidizes, becomes porous and, although the weld seems ok initially, as it cools you can see it's all scale and porous. A single light tap with a hammer is all that's needed to make the whole thing come apart.
The mixture is the only one I could find in small cans.
I have no room for a full-sized acetilene torch, nor would it be wise to store such huge gas cans in my attic!
So I went and asked for small cans of acetilene and the guy gave me this can, it's called "Novacet" from Walkover.
Still, I couldn't make a decent weld.
I tested it trying to weld two nails together.
No way.
I tuned the flame so that the plume just disappeared, but anyway I got a mess. Leave some plume and the welding rod will not melt.
Somebody knows wich mixture is "novacet"?
Why I can't get a decent weld?
What I'm doing wrong?
