Method for continuous drawing of wire rod
AssigneeSumitomo Metal Industries, Ltd.
InventorsHyoji Hagita, Takashi Fukuda, Shigeru Maeda, Hideo Imamura, Kazutosi Ogata, Masahiro Fukuoka
Life of this patent
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Abstract
A wire rod is payed out from a pay-off stand and descaled in a descaling process. After preheating to a predetermined temperature by a preheating device, it is subjected to a lubrication pretreatment through a zinc calcium phosphate solution applied with ultrasonic wave in the lubrication pretreatment process. After rinsing process, the lubrication-pretreated wire rod is coated with a calcium stearate or a sodium stearate in lubricating process. Thereafter, the wire rod is dried sufficiently in drying process, and then added with a predies lubricant in wire drawing process and coiled by a coiler.
Claims7
A method for continuously drawing a wire rod into a wire, comprising the steps of:
- descaling the wire rod;
- preheating the descaled wire rod;
- pretreating the preheated wire rod for lubrication by passing said rod through a calcium zinc phosphate solution heated to 70.degree.-90.degree. C. and having the ratio (Ca/Zn)=0.3-1.0;
- rinsing the pretreated wire rod;
- lubricating the rinsed wire rod by coating said rod with a calcium stearate or a sodium stearate;
- drying the lubricated wire rod;
- lubricating the dried wire by coating said wire with a predies lubricant having metallic soap as the main component added with an ethylene tetrafluoride in 1-10% by weight;
- and
- drawing the dried wire rod into a wire.
Dependencies are inferred from the claim text.