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How to producehollow steel for drill rods?
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The processes of hollow steel for drill rods are as follow:
-smelted by an electric furnace
-refined by an LF furnace
-cast by a bloom caster
-rolling intermediate billet by a blooming mill
-drilling the central hole by a deep hole drilling machine
-adding mandrel
- rolledby a semi-continuous rolling mill
- controlled cooling
- quality inspection
- cut to certain length
- transferred tothe production line of drill rods.Previous article:
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