This 19th century style boarding axe was a bit larger than a trade spike axe and forge welding the languets on, then keeping them matched and even while the two halves of the axe are being forge welded together is almost a three handed job.
There is some speculation that the spike axe was derived from the boarding axe. I understand that these axes were used for general work aboard ship (have you seen the film Master & Commander?) but were also used as weapons when boarding an enemy ship hence the name. I believe that they would make a formidable addition to an arsenal. This one is patterned after the British navy boarding axe. Here I’m fitting the handle before heat treating and the final finish.