An alloy steel (containing ni, cr, mo, etc.) may be hardened to a greater degree than an unalloyed steel. this behavior is due to the presence of the alloying elements that delay austenite-to-pearlite and austenite-to-bainite reactions.

a. false
b. true

True.

In fact, this is essential for the creation of new alloys. By adding elements not only the creation of perlite from austenite is delayed, but also allows the addition of resistance, ductility, wear and impact properties. For example, the Nickel improves the heat treatment properties by reducing the hardening temperature and distortion when tempered. Chromium increases the depth of hardening and improves resistance to wear and corrosion. Molybdenum, on the other hand, allows the alloy with steel to form carbides and also dissolves in ferrite to a certain extent, so that it intensifies its hardness and toughness. Molybdenum substantially lowers the transformation point. Due to this abatement, molybdenum is ideal for optimizing the hardenability properties in oil or air.

answer:

2d

explanation: