The book contains useful information on precipitation hardening and related topics.
'Precipitation Hardening in "Alloy Series, Harper Brothers, Publishers, New York, USA (1956) [49-50].
Thus, the precipitation hardening
has a decisive effect on creep properties of microalloyed steels.
The company has completed extensive development on Hastalloy B, precipitation hardening
alloys and the duplex alloys, all of which have excellent mechanical properties.
Different mechanisms realize the aimed high strength of this steel group: precipitation hardening
by hindering the dislocation movement, grain refinement due to nucleation at precipitates, and grain growth hindrance at high temperature by TiN.
Chemical composition of steel can be modified adding some alloying elements such as Cr, Ni, Mn, Si, W and others, which form hard carbides or joint intermetallic compounds required for precipitation hardening
The hardening effect deriving from solid-solution strengthening of hydrogen eventually overrode that from precipitation hardening
. The maximum hardness elevation was from 236.9 to 491.1 VHN.
The strengthening mechanisms alloys (A and B) divided into the precipitation hardening
in addition to dispersion strengthening.