Down And Dirty Type
Metallurgy is the examine of metal. Welding Metallurgy is the research of how welding affects the microstructure of metallic.
Do you know that there are metallurgists who devote their lives to only studying carbon steels So what about all the opposite metals like Stainless steel, nickel alloys, aluminum, magnesium, titanium, cobalt, and copper alloys
Metallurgy is such a deep and mysterious subject that it takes a lifetime to completely perceive carbon steels a lot less all the remainder.
So if is such a deep topic, what chance does a welder have in understanding enough about metallurgy with a view to be a greater welder.
There may be good news. And its not mattisland stone island that I saved a bunch of cash on my automobile insurance by switching to GEICO.
The excellent news is that you just dont have to know every thing about metallurgy. You just want to grasp some fundamental principles.
The absolute elementary factor to grasp is that heat from welding affects steel. That sounds actually simple but it’s profound. Why Because heat impacts completely different metals in other ways.
Whenever you heat a piece of steel to purple scorching, after which quench it by dunking it in a bucket of cold water, what do you assume occurs If you happen to reply “it hardens” you’re only partially proper. Just a few metals harden by heating and fast cooling. Most other metals react totally otherwise.
Carbon and low alloy Steels like 4130, device steel, forged iron, and a few 400 series stainless steels harden by fast cooling from a purple scorching temperature.
But most different stainless steels, nickel alloys, aluminum, magnesium, titanium, cobalt, and copper alloys will actually soften and lose properties by heating up purple scorching and fast cooling.
So what does this imply to you the welder
If you are doing a weld on 4130 chromoly, you should know not to hurry cool the weld or it’ll harden.
In case you are welding 6061 t6 aluminum, it’s essential to know that the weld space will soften if it gets too scorching for too lengthy, and strength will probably be lost and by no means regained until a full heat treatment might be finished.
Welding 301 full exhausting stainless steel is straightforward to do, however heat from welding recrystallizes the work hardened microstructure and the power and hardness goes proper out the window.
Welding 304 stainless could cause carbon and chromium to bind up and kind chromium carbides if the weld space stays too hot for too lengthy.
So do you get the picture. Heat affects completely different metals in different ways.
Welding Metallurgy studies precisely how the heat from welding impacts metallic and when you the welder take the time to study metallurgy, the information gained will make you higher.
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