How exactly does B increase hardenability of hypo-eutectoid steels and not for hyper-eutectoid steels ?

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Bogdan Pawłowski

Quite good explanation you can find here:

Screenshot attached :)

http://books.google.pl/books?id=wWVgfUK0efYC&pg=PA195&lpg=PA195&dq=Boron+hardenability+hypereutectoid+steels&source=bl&ots=RzVnw3cSg9&sig=P_FM8vS2QiVC-T4w7RtopPChE8w&hl=pl&sa=X&ei=w0N4VKrXKcPeavmwgNgD&ved=0CCkQ6AEwAQ#v=onepage&q=Boron%20hardenability%20hypereutectoid%20steels&f=false

Rhushikesh Mane

Thanks for very informative answer!!!