Tempering of low carbon steel
Tempering of low carbon steel
(OP)
I have got a quench and tempered low carbon steel. The microstructure like pearlite + ferrite. Shouldn't it be tempered martensite?
Can someone provide me some useful information about quench and tempering microstructure?
thx
Can someone provide me some useful information about quench and tempering microstructure?
thx





RE: Tempering of low carbon steel
RE: Tempering of low carbon steel
Chocolates,men,coffee: are somethings liked better rich!!
(noticed in a coffee shop)
RE: Tempering of low carbon steel
RE: Tempering of low carbon steel
Mn1.3, Si0.25,Cr/Ni0.14,Mo0.2
RE: Tempering of low carbon steel
RE: Tempering of low carbon steel
RE: Tempering of low carbon steel
RE: Tempering of low carbon steel
In fact, I had 3 samples, which are same materials.
I had them for different heat treatment. Quenching, quenching_tempering at 580, and Q+T at 650.
The just quenched one shows there are some martensite formed.
For 580C I think it is the tempered martensite structure.
But for 650C, the pearlite come, and I do not understood.
Thanks again
RE: Tempering of low carbon steel
RE: Tempering of low carbon steel
RE: Tempering of low carbon steel
RE: Tempering of low carbon steel
If you can not access to it, please let me know your emails please.
Thanks
Also, as I am a graduate working in the metalurgy area. Is there any good way to ahieve knowlage and experience like you guys as fast as possible?
RE: Tempering of low carbon steel
As far as your second question, there is no shortcut. Thirty years ago I was in your shoes, the best thing I can say is to work with metallurgists that do have the experience. Not everything is in the textbooks.
RE: Tempering of low carbon steel
Can you confirm the etchant and the magnification of the image? I believe this is spheroidized carbides in a ferritic matrix, but the magnification appears to be quite low. Can you obtain higher magnification?
RE: Tempering of low carbon steel
I use to think this is a spheroidized phase, but I do not think the time 1 hour is enough for it. Also, a testhouse call bodycote say that is pearlite.
I really wish to learn from other metallurgists but I am the only "metallurgist" as my company is a design based.
I have attached the file in 2003 version.
Thanks
RE: Tempering of low carbon steel
I just downloaded a PPTX viewer and I agree with TVP. If you can get a 500X shot we can confirm the structure for you.
RE: Tempering of low carbon steel
Thanks
RE: Tempering of low carbon steel
RE: Tempering of low carbon steel
Can anyone confirm that it is ferrite + pearlite for the 580C one?
Thanks
RE: Tempering of low carbon steel
It is difficult to tell from the photomicrograph. It could be highly tempered martensite but more resolution is needed.
RE: Tempering of low carbon steel
RE: Tempering of low carbon steel
RE: Tempering of low carbon steel
Hello. What is the etchant you are using? Also, are you aware that Mn is austenite stabilizer? Perhaps with this carburdizing alloy you cannot form martensite using water as a quenching agent. What is the Ms Temperature for this alloy? Maybe it's below room temperature.
About the microstructure you presented. You have to be careful with ductile materials when polishing. It's very easy to generate polishing artifacts. Also, please when you present a micrograph put in a marker for scale.
Best Regards
RE: Tempering of low carbon steel
I have retake the microgaphs this time by myself, please have a look again I think it is much clearer!
The scale bar is not working at the moment.
Thanks
This is the 580C one
RE: Tempering of low carbon steel