鍛造 is read as たんぞう (tanzou) and means forging.
たんぞう
tanzou
かたたんぞう
die forging
きたえる
to forge
たんれん
tempering (metal)
かじば
blacksmith's workshop
たんきん
hammering
きたえあげる
to temper thoroughly
せいぞう
manufacture
そうぞう
Creation (by God)
ぎぞう
forgery
もぞう
imitation
ちゅうぞう
casting
じょうぞう
brewing