Help me solve this riddle

A lonely wanderer, wounded with iron, I am smitten with war-blades, sated with strife,
Worn with the sword-edge; I have seen many battles, Much hazardous fighting, oft without hope
Of comforts or help in the carnage of war Ere I perish and fall in the fighting of men.
The leavings of hammers, the handiwork of smiths, Batter and bite me, hard-eged and sharp;
The brunt of the battle I am doomed to endure. In all the folk-stead no leech could I find
With wort or simple to heal my wounds; But day and night with the deadly blows
The marks of the war-blades double and deepen.