(a)State one reason why high carbon steel can be hardened by heating and quenching.
(b)Describe the process of hardening the cutting end of a cold chisel in a forge under the following headings:
(i)method of heating;
(ii)temperature required;
(iii)medium of quenching;
(iv)method of quenching;

(c)Describe the heat treatment process required to make the chisel in (b) suitable for use after hardening.