Dear Sir/Madam experts,
I've some problem quenching problem for 4140 etc. steel at car bottom type heat treatment furnance. Austenizing temperature 880C. Quenching media is polymer. Consantration is nearly %12-13. The Materials is bloom. The diameter is 400mm. I measure nonuniform hardness profile at same charge with the other materials. But the other materils is ok.
And also the other problem is almost same. But the furnence is fit type furnance, quenching media is salt bath that is 150C. The material has rust of bottom after quenching and low hardness according to top of material.
The last, what is your opinion dimension difference quenching process at same charge?
Thank you for your attention.
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Burak Turk
Material Science Engineer
Termo Induction Heat Treatment and Machine Industry
Tuzla
+905314750609
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