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Copper Round Bar: Ingot Hammered Round with Annealing
Copper is soft and ductile but stiffens as it is hammered; heating it (annealing) and cooling it in air or water softens it again, the way copper has been worked for a thousand years. Draw a copper ingot out on the anvil to a square, take the corners down to an octagon, then round, annealing whenever it stiffens.
The picture: our diagram of the cross-sections.
中级
Half a day
说明
1
1
Anneal the ingot
Anneal the ingot
Heat the copper ingot in the forge to a dull red and quench it in water to soften it.
此步骤所需材料：
铜锭1 个
木炭1 as required
水10 升所需工具：
铁匠炉
铁匠钳
淬火水桶
电焊手套
安全眼镜2
2
Draw it square
Draw it square
Hammer it out on the anvil into a long square bar, turning it a quarter turn between blows. Anneal again whenever it gets hard to move.
所需工具：
铁砧
横向楔头锤铁匠钳铁匠炉淬火水桶3
3
Octagon, then round
Octagon, then round
Hammer the four corners down to make an octagon, then the eight corners to make it round. Check the diameter along its length.
所需工具：
铁砧横向楔头锤
6 英寸数显卡尺4
4
True and finish
True and finish
Anneal a last time if it must be bent later, straighten it, and file off hammer marks and the ragged ends.
所需工具：
锉刀套装铁砧此蓝图制作
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