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Author: Subject: New toy (Reicherter Rockwell tester)
Fulmen
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[*] posted on 27-4-2015 at 11:27
New toy (Reicherter Rockwell tester)


I really don't have space for it, but how often does something like this come along for free?


Now I just have to learn how to use it...




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Fulmen
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[*] posted on 27-4-2015 at 13:19


I think I have this figured out, I'm getting fairly even and plausible results on test pieces. I got some calibration blocks as well, but I don't want to waste them until I am sure I know what I'm doing. There is an instruction placard that comes with it, but due to it's fragile nature I want to have a glass frame ready for it before I pick it up.
I really wish I could get my hands on the relevant ISO (or ASTM) for this, but I can't afford spending money on that right now. I am especially unsure about soak times at each stage...


I could also use a good text on the relationship between Rockwell and tensile strength, the charts out there do wary a bit. This unit has 63.5, 100, 150 and 187.4kg weights, and it comes with the diamond indenter as well as 1/16" and 2.5mm steel balls. This makes for a pretty wide measuring range if there is correlation factors and tables available.

[Edited on 27-4-15 by Fulmen]




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blogfast25
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[*] posted on 27-4-2015 at 13:46


Quote: Originally posted by Fulmen  

I could also use a good text on the relationship between Rockwell and tensile strength, the charts out there do wary a bit. This unit has 63.5, 100, 150 and 187.4kg weights, and it comes with the diamond indenter as well as 1/16" and 2.5mm steel balls. This makes for a pretty wide measuring range if there is correlation factors and tables available.



Going by other hardness testers (Shore A and Shore D) I've first hand experience with, Rockwell results should correlate much better to elastic modulus than to tensile strength.





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aga
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[*] posted on 27-4-2015 at 13:52


Looks like it's meant for Metal hardness, as in Steel.

Cool thing to have for free !

However, i'm the same with Space : i'd have nowhere to put it, and have never had a use for one.




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Chemosynthesis
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[*] posted on 27-4-2015 at 15:25


Pretty awesome.
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Fenir
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[*] posted on 27-4-2015 at 16:11


Congratulations on your equipment, it would be interesting to test various stainless steels and compare them to tool/carbon steels.
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Fulmen
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[*] posted on 27-4-2015 at 22:08


Blogfast: Rockwell should correlate fairly well with yield strength. It measures permanent deformation after the load has been released while durometers IIRC measure deformation during load. It's not as good as say Vickers, but it's far simpler to perform.

Couldn't come at a better time as I'm doing a bit of case hardening at the moment.




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jock88
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[*] posted on 28-4-2015 at 02:55



They are used at the viagra factory too ;)
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