提高圓管坯質(zhì)量的工藝實踐及研究

Technological Practice for and Research on Improvement of Round Blooms for Tube-making

摘要: 針對攀鋼生產(chǎn)的軋制無縫管用圓管坯存在的問題,通過取樣分析,認為缺陷主要是管坯的表面裂紋,為此進行了針對性的研究。在煉鋼方面提出了控制入爐原料硫含量、鋼液終點碳含量及鋼中酸溶鋁等措施,在軋制管坯時優(yōu)化軋制工藝,改進圓管坯的夾持裝置,采用高壓水除鱗等措施,使管坯質(zhì)量大幅度改善,從而提高了圓管坯的軋管成材率。

Abstract: Addressing the defects relating to the Pangang-supplied round blooms for tube-rolling, it was identified by sample analysis that the major defect of the bloom is surface crack, based on which, follow-up studies were conducted. As a result, positive measures have been taken, including proper control of the sulfur content of the charges of the melting furnace, and final carbon content and content of acid-dissolved aluminium in the molten metal; optimization of the bloom-rolling process, improving the bloom clamping device and employment of a hi-pressure descaling system. Thanks to the a.m. measures, quality of the round bloom has been significantly improved, thus the yield of the tube rolling operation.