If you want to make a heterogenouos welding, where at least one base metal is stainless steel, always use the Schaeffler diagramm. My first guess would be a high alloyed filler metal, for example Citochromax-R (this is Oerlikon), with Cr18%, Ni9% and Mn6%. This would give you almost for sure an...
Normaly I would use an austenitical electrode with
10%Ni,18%Cr, maybe with 1-3%Mn.
The only problem is that after welding, you must use controlled cooling time. This should be such long that to not to let form martensite in the t8/5 cooling periode. In these cases martensite is public enemy...
Hi,
The people are right. Don't trust anything when it comes to lifting and rigging. But when you must deal with these kind of problems, you can always rely on old German welding school rules:
1. Modify your structure in a way that all welds should work only on compression. This way your weld...
Hi,
You can try Sika Force 7780 (bi-component structural adhesive). This is what I use for our asian client for bonding the zinc coated sidewall plates into the sidewall frame for some goods transport wagons.
Before that we used electro-rivetting (this is a MIG-MAG kind of spotwelding applied...
I repaired once a Mercedes 500 sport Al block by welding.
I can tell you that it can be pretty tricky.
First, it only worth doing it if that part of the block is not solicited dynamically. If that's the case, you can do the welding.
Then as the others told, stop the crack with drilling holes at...
It depends of the current and voltage you will use to weld. The aim is that the Heat Altered Zones of the welds not to be in touch with each other. When you homologate the welds, the HAZ must be under 350HV, anyway, it is always higher than what you can measure inside the weld. If the second HAZ...
A big hello to everybody!
We are working on a design of a citybus and the client wants exclusively a slide-out powered ramp for the boarding on the bus of the wheelchaired passengers. Our problem is that we can not find any supplier, and we need to be a European ramp supplier. If anybody knows...
hi,
All the others are right, but:
What is the main difference between Mig and Tig?
The difference is the Linear Energy Introduced in the assembly.
Now, if you had no problems with Mig, it means that the Energy (heat) input could be supported by the plate and the tube. (also it is possible...
As I know, the American Welding Society is member of the International Welding Society, and the IWE Diploma was the idea of IWS. I think it is only a problem of will. I am sure, that there are AWS offices in every state. I think it's about AWS not wanting to accept the teaching methods of the...
metengr;
If your company is ISO or TÜV certified, when they come for the next audit, they will ask for the qualified personell, which also should be documented (and they do not recognize other then EWE or IWE Diploma). You don't show them the man with the Diploma, you're certificate is simply...
Hello everybody!
As I see, the welding issues are taken very differently in the US compared to Europe. According to the new rules, no company will be certified for any welding-type activity, begining with 2005, if they don't have personell that have EWE or IWE Diploma. You can call it...
PatrickR!
A french engineer told me once, when I ask him about his very complecated design style:
"The less people understand our drawings, the more they need us."
:))
Cheers.
I worked three years for a trolleybus manufacturing company, it is standard equipment at trolleybuses, tramcars and metro-coaches in Europe.
When braking, the electrical engine is the main brake, and only at lower speeds these vehicles use classical friction brakes. When braking, the electrical...
According to the law, if they present a homologation paper for that part (their supplied part) where it is stated that the part is complying with the Regulation No.... (This homologation paper is issued by an other certified testing institute like TÜV, or French Automotive Authorithy or such...
