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    少機架三輥連軋管機組“以熱代冷”的深入探討

    Further Discussion on Replacing Pipe Cold-rolling (drawing) Process with Pipe Hot-rolling Process of Less Stand 3-roll Mandrel Pipe Mill

    • 摘要: 以Ф76 mm少機架三輥連軋管機組的實踐應(yīng)用為背景，從生產(chǎn)成本、成材率、投資與運營維護、自動化水平、節(jié)能環(huán)保等多方面，對該機組與穿孔+冷軋（拔）機組進行了對比。認為在生產(chǎn)小直徑無縫鋼管方面，對于絕大多數(shù)尺寸精度和表面質(zhì)量要求不苛刻的小直徑低中壓鍋爐用無縫鋼管、結(jié)構(gòu)用無縫鋼管、普通流體輸送用無縫鋼管等品種，采用少機架三輥連軋管機組作為穿孔+冷軋（拔）的升級換代機組，進行“以熱代冷”，具有較為明顯的優(yōu)越性，具備推廣價值。

       

      Abstract: Based on the operation circumstances of the Ф76 mm less stand 3-roll mandrel pipe mill line, this very mill is compared with the piercing+cold-rolling (drawing) mill production line in terms of operation cost, finished product rate, investment and operation maintenance, automation level, and energy-saving and environmental friendliness, etc.As a result, it is concluded that when it comes to manufacture of small-sized seamless steel pipes, for producing most of the medium-low pressure boiler pipes, structure-purpose pipes and ordinary fluid transport pipes, etc., which are not so strictly required for demisional accuracy and surface quality, using the less-stand 3-roll mandrel mill as an upgrade mill to replace the piercing+cold-rolling (drawing) mill, in short words, "replacing cold rolling with hot rolling" will bring about remarkable advantages, which is worth spreading up.

       

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