Down And Dirty Model
Metallurgy is the research of steel. Welding Metallurgy is the examine of how welding impacts the microstructure of steel.
Did you know that there are metallurgists who dedicate their lives to solely 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 topic that it takes a lifetime to completely understand carbon steels a lot less all the remaining.
So if is such a deep subject, what probability does a welder have in understanding enough about metallurgy as a way to be a better welder.
There’s excellent news. And its not that I saved a bunch of money on my automobile insurance coverage by switching to GEICO.
The excellent news is that you just dont have to know all the pieces about metallurgy. You just need to understand some primary rules.
Absolutely the elementary factor to know is that heat from welding affects metal. That sounds really easy but it’s profound. Why Because heat affects completely different metals in different ways.
Once you heat a bit of steel to crimson hot, after which quench it by dunking it in a bucket of cold water, what do you assume happens Should you answer “it hardens” you’re solely partially right. Just a few metals harden by heating and fast cooling. Most different metals react completely otherwise.
Carbon and low alloy Steels like 4130, tool steel, forged iron, and some 400 sequence stainless steels harden by fast cooling from a pink scorching temperature.
But most other stainless steels, nickel alloys, aluminum, magnesium, titanium, cobalt, and copper alloys will truly soften and lose properties by heating up purple scorching and quick cooling.
So what does this mean to you the welder
In case you are doing a weld on 4130 chromoly, you want to know not to hurry cool the weld or it’s going to harden.
In case you are welding 6061 t6 aluminum, it’s worthwhile to know that the weld area will soften if it gets too sizzling for too lengthy, and power will probably be misplaced and by no means regained except a full heat remedy will be performed.
Welding 301 full laborious stainless steel is easy to do, but heat from welding recrystallizes the work hardened microstructure and the power and hardness goes proper out the window.
Welding 304 stainless can cause carbon and chromium to bind up and kind chromium carbides if the weld space stays too hot for too long.
So do you get the image. Heat impacts different metals in alternative ways.
Welding Metallurgy research precisely how the heat from welding impacts metallic and when you the welder take the time to check metallurgy, the knowledge gained will make you higher.
Creator Field Jody Collier has 1 articles online
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