Chapter 13 - Ferrous Alloys

Question 1

Ferritic stainless steels

Answer 1

Steels that contain up to 30% Cr and less than 0.12% C

Question 2

Martensitic stainless steels

Answer 2

Unusually high hardness in a steel tempered at a high temperature caused by the precipitation of alloy carbides

Question 3

Austenitic stainless steels

Answer 3

Nickel, which is an austenite stabilizing element, increases the size of the austenite field, while nearly eliminating ferrite from the iron-chromium-carbon alloys. (These are non-magnetic.)

Question 4

Precipitation-hardening (PH) stainless steels

Answer 4

The steel is first heated and quenched to permit the austenite to transform to martensite. Reheating permits precipitates such as Ni3Al to form from the martensite

Question 5

Compacted graphite iron has small additons of __ and ______

Answer 5

Mg and Titanium

Question 6

small additions of Mg and titanium in Compacted grphic iron causes

Answer 6

graphite to grow, during solidification, as an interconnected, coral shaped precipitate.

Question 7

Compacted graphite iron has properties

Answer 7

intermediate to gray and ductile cast iron.