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Spring Steel Strip and Wire, Hardened and Tempered
A spring must bend and come back. Mild steel bends and stays bent; high-carbon steel, hardened and then tempered to a blue colour, springs back. The strip or wire is shaped soft, heated until a magnet no longer sticks to it, quenched in warm oil to harden it, then tempered: cleaned bright and heated gently until the colour runs to blue.
It starts from high-carbon crucible steel. Wire is drawn while the steel is still annealed.
高级
A day
说明
1
1
Forge strip
Forge strip
Forge crucible steel at a yellow heat into strip, smoothing it with the flatter; never work it below red. Cut it to length while hot.
此步骤所需材料：
坩埚钢1 公斤
木炭10 公斤所需工具：
铁匠炉
铁砧
铁匠锤
平锤垫铁
铁匠钳
皮革围裙
电焊手套
安全眼镜2
2
Anneal
Anneal
Heat to a dull red and bury it in dry wood ash to cool slowly overnight.
此步骤所需材料：
硬木灰2 公斤所需工具：
金属桶3
3
Draw wire
Draw wire
For wire, forge a rod, anneal it, and draw it through the drawplate with wax, annealing after every hole. Coil or bend the springs now, while it is soft.
此步骤所需材料：
蜂蜡10 克所需工具：
钢制拉丝板
拉丝钳
台虎钳4
4
Harden
Harden
Heat the part evenly until a magnet no longer sticks, then plunge it into a lidded bucket of warm rapeseed oil and stir it. Keep the lid at hand for flare-ups.
此步骤所需材料：
菜籽油5 升所需工具：
铁匠炉
磁铁
带盖金属桶铁匠钳电焊手套5
5
Clean bright
Clean bright
Sand a stripe bright on the hardened steel so you can see the temper colours.
所需工具：
砂纸6
6
Temper to blue
Temper to blue
Heat it gently and evenly with the torch on fire bricks, or on a hot plate of steel, and watch the colours run straw, bronze, purple, blue. Stop at an even blue and let it cool.
所需工具：
丙烷喷灯
耐火砖铁匠钳7
7
Test
Test
Clamp one end in the vise and bend the free end a little: it must spring back straight.
所需工具：
台虎钳
6 英寸数显卡尺8
8
Troubleshooting
Troubleshooting
Spring tempering troubleshooting.
Flow
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