杭钢80t DC EAF-LF-CC工艺20Mn2链用钢盘条的试制

特殊钢 ›› 2005, Vol. 26 ›› Issue (6): 57-58.

杭钢80t DC EAF-LF-CC工艺20Mn2链用钢盘条的试制

鲁欣武 ,潘志军

杭州钢铁集团公司技术中心，杭州310022

收稿日期:2005-06-20 出版日期:2005-11-08 发布日期:2023-04-13
作者简介:鲁欣武(1966-),男，1990年毕业于北京科技大学，硕士，高级工程师，从事新产品开发工作。

Pilot Production of Steel 20Mn2 Coil for Chain by 80 t DC EAF-LF-CC Process at Hangzhou Steel

Lu Xinwu , Pan Zhijun

Technical Center,Hangzhou Iron and Steel Group Co,Hangzhou 310022

Received:2005-06-20 Published:2005-11-08 Online:2023-04-13

摘要/Abstract

摘要： 杭钢采用80 t超高功率直流偏心底电弧炉-钢包炉(LF)-150 mm×150 mm连铸-高速线材轧机试制了20Mn2(%:0.19~0.24C,1.50~1.70Mn)链用钢Φ8 mm和Φ12 mm盘条。LF冶炼时将钢中酸溶铝控制在0.020%0.025%,喂硅钙线并全程吹氩,连铸时采用长水口,钢水过热度为2535℃,使钢水纯净度较高,全氧含量为(22~31)×10^-6,夹杂物≤2.0级。通过控制开轧温度950~980℃、终轧温度820~860℃和轧后延迟性冷却工艺,钢的晶粒度为8~10级,屈服强度为620~650 MPa,抗拉强度835~875 MPa,延伸率15%18%,热轧材硬度(HB)175~195,满足标准和使用的要求。

关键词: 20Mn2链用钢, 盘条, 控制冷却

Abstract: The Φ8 mm~12 mm rod coil of 0. 19~0.24C,1.50~1.70Mn steel 20Mn2 was produced by an 80 t DC UHP EBT are furnace-ladle furnace(LF)- 150 mm×150 mm concasting- high speed rod rolling mill process at Hangzhou Steel. During LF refining,the soluble aluminium in steel was controlled between 0.020% and 0.025% with feeding Silicon- calcium wire and argon stiring full period, in concasting the long nozzle was adopted and the over heat of liquid steel was between 25 ℃ and 35 ℃,therefore the cleanliness of steel was higher that the total oxygen content in steel was between (22~31)×10-⁶ and the inclusion rating was ≤2.0.With controlling beginring rolling temperature between 950 ℃ and 980 ℃,finishing temperature between 820 ℃ and 860 ℃,and after rolling delay cooling process the grain size of steel was 8~10 class,yield strength 620~650 MPa,tensile strength 835~875 MPa,elongation 15%～18% and hardness(HB)of hot rolled products 175~195 to meet the requirement of standard and service.

Key words: 20Mn2 , Steel for Chain, Rod Coil, Controlling Cooling

鲁欣武 , 潘志军. 杭钢80t DC EAF-LF-CC工艺20Mn2链用钢盘条的试制[J]. 特殊钢, 2005, 26(6): 57-58.

Lu Xinwu , Pan Zhijun. Pilot Production of Steel 20Mn2 Coil for Chain by 80 t DC EAF-LF-CC Process at Hangzhou Steel[J]. Special Steel, 2005, 26(6): 57-58.