SS-Micro-structure Interpretation
SS-Micro-structure Interpretation
(OP)
Hi,
Hope you guys are doing well. I have occurred a microstructure (pic attached) which appears to be resembling that of martensitic stainless steel, however, the composition of the material is telling a different story. I used OES for chemical analysis, the sample consists of C (0.129 wt%), Si (0.108wt%), Mn (0.702wt%), Cr(17.341wt%),Mo(0.992wt%),Ni(4.41wt%), Nb(0.1wt%) and Fe (balance).

Hope you guys are doing well. I have occurred a microstructure (pic attached) which appears to be resembling that of martensitic stainless steel, however, the composition of the material is telling a different story. I used OES for chemical analysis, the sample consists of C (0.129 wt%), Si (0.108wt%), Mn (0.702wt%), Cr(17.341wt%),Mo(0.992wt%),Ni(4.41wt%), Nb(0.1wt%) and Fe (balance).


RE: SS-Micro-structure Interpretation
More Ni for use in thicker sections perhaps?
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P.E. Metallurgy, consulting work welcomed
RE: SS-Micro-structure Interpretation
Regards, Wil Taylor
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RE: SS-Micro-structure Interpretation
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RE: SS-Micro-structure Interpretation
RE: SS-Micro-structure Interpretation
I am sure that with the Ni and C you have it is possible to quench and get a lot of retained austenite.
While this might be helpful in hot working or welding it will require some attention.
If you single temper you will likely end up with a bunch of un-tempered martensite (because it converted later).
I didn't try to calculate a Mf temp, but my gut feel is that it would colder than room temp.
My thought is quench, temper, chill, re-temper.
What HT was used on this sample?
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P.E. Metallurgy, consulting work welcomed
RE: SS-Micro-structure Interpretation
DHURJATI SEN
RE: SS-Micro-structure Interpretation
Regards By,
Karthik
Material Engineer
RE: SS-Micro-structure Interpretation
Give us some info here.
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P.E. Metallurgy, consulting work welcomed
RE: SS-Micro-structure Interpretation
Hard-core SS if you get my meaning.
p.s., nobody should be reporting major alloy analyses to three decimal places.
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"
RE: SS-Micro-structure Interpretation