宝钢φ140mm连轧管机组轧制技术进步.pdfVIP

宝钢φ 140mm 连轧管机组轧制技术进步 王小宝 郑坚敏 谢麒麟 （宝钢股份钢管事业部无缝钢管厂，上海 201900 ）1 摘 要 宝钢φ 140mm 连轧管机组是一套全浮动芯棒连轧管机组，原设计以生产碳钢为主，年产 50 万吨。投产后 历经8 年爬坡，实现了年达产；后续经过持续技术攻关和设备优化升级，产能突破了84 万吨；在管坯加热、穿孔、 连轧和张减等工序开发了专有技术系统，产品规格和钢级在原设计的基础上实现了飞跃发展，目前正在朝着生产用 于能源和机械制造业的高精度、高合金等高端产品的方向迈进。 关键词 全浮动芯棒连轧管机组 环形炉 轧制技术 孔型设计 Steel Tube Pipe Rolling Technology Progress of the φ 140mm Mandrel Mill of Baosteel Wang Xiaobao Zheng Jianmin Xie Qilin (Seamless Tube Plant of Baoshan Iron ＆ Steel Co ．，Ltd ．，Shanghai，201900) Abstract The φ 140mm mandrel mill (hereinafter referred to as 140 mill) is a set of free floating mandrel mill, according to its original design, most products are carbon steel. After 8 years running, the 140 mill reached its designed output (500000 tons per year) in 1993. Then in the following years, the characteristic of fast piece rate was brought into full play through technology and equipment upgrading, and the peak annual output exceeded 840000 tons. The know-how system of the billet heating, rotary piercing, continuous rolling and stretch reducing was developed successfully. Compared with the original design, the product’s size and steel grade have progressed significantly. And now, the 140 mill is turning to produce high-end products, such as high-precision, high-alloy tube and pipe used in energy and machinery. Key words free floating mandrel mill, rotary hearth furnace, rolling technology, caliber design 1 引言 宝钢无缝钢管厂φ 140mm 连轧管机组（以下简称140 机组）是一套全浮动芯棒连轧管机组，于1985 年 11 月投产，代表了20 世纪70 年代无缝钢管生产的世界先进水平。历经8 年的生产爬坡，在1993 年达到了 设计产量（50 万吨/a ），随后通过不断地技术改造和设备优化升级，充分发挥了全浮动芯棒连轧管机组生产 节奏快的特点，2002 年首次突破年产80 万吨大关，2004 年达到了84 万吨[1] 。 140 机组原设计产品定位以碳钢为主，产品合金含量不超过5 ％。为适应市场需求的变化，产品结构在 不断地优化调整，2008 年成功实施了深度改造，其核心是将桶形辊穿孔机改造成锥形辊穿孔机，为高合金 生