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Spring Steel Strip and Wire, Hardened and Tempered

作成者

Forge

11. 10月 2026

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.

上級者

A day

手順

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.

このステップの材料:

るつぼ鋼1 kg

木炭10 kg

必要な工具:

鍛冶炉

金床

鍛冶ハンマー

平らし工具

鍛冶やっとこ

革のエプロン

溶接用手袋

保護めがね

Anneal

Heat to a dull red and bury it in dry wood ash to cool slowly overnight.

このステップの材料:

堅木の灰2 kg

必要な工具:

金属バケツ

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.

このステップの材料:

蜜蝋10 g

必要な工具:

鋼製ダイス板

引き抜き用やっとこ

万力（ベンチバイス）

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.

このステップの材料:

菜種油5 リットル

必要な工具:

鍛冶炉

磁石

蓋付きの金属バケツ

鍛冶やっとこ

溶接用手袋

Clean bright

Sand a stripe bright on the hardened steel so you can see the temper colours.

必要な工具:

紙やすり

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.

必要な工具: