斜轧扩径生产工艺刍议

Discussion on Rotary-expanding Process

简述了斜轧扩径工艺的发展过程和应用情况。介绍了斜轧扩径机的结构、轧辊布置及调整方式、特点,以及斜轧扩径的生产工艺流程和变形特点。初步分析了天津钢管集团股份有限公司Φ720mm斜轧扩管扩径机组试生产期间的产品质量及影响因素,该试生产结果表明斜轧扩径机可轧制径壁比大于50的薄壁管;生产的部分产品填补了国内空白,产品质量达到或接近国外同类产品的实物质量。

Briefly described in the article are the development and application of the rotary-expanding process. Detailed are such aspects of the rotary expander, covering structure, roll arrangement and roll-setting mode and features as well as the manufacture process flow and deformation characteristics. An initial investigation is made into the quality and quality-affecting factors of the products as made from the trial production of the φ720 mm rotary expander plant as located in Tianjin Steel Pipe Group Corp. Ltd. The said trial production demonstrates that the rotary expander is capable of producing light-wall tubes with DIS ratio over 50. Part of the products as rolled by the mill are the first of their kinds in the domestic circles, and the product quality is close to or even up to the physical quality of similar products as produced overseas.