控轧控冷对38CrMoAl钢盘条硬度的影响和工艺优化

特殊钢 ›› 2019, Vol. 40 ›› Issue (3): 35-38.

控轧控冷对38CrMoAl钢盘条硬度的影响和工艺优化

马志军

江苏永钢集团有限公司技术部,张家港215628

收稿日期:2019-11-28 出版日期:2019-06-01 发布日期:2022-05-16
作者简介:马志军(1971-)，男，高级工程师,1996年武汉科技大学(本科)毕业，钢铁材料、产品和工艺研究。

Effect of Control Rolling and Cooling on Hardness of Steel 38CrMoAl Coil and Optimization of Process

Ma Zhijun

Technology Department, Jiangsu Yonggang Group Co Ltd, Zhangjiagang 215628

Received:2019-11-28 Published:2019-06-01 Online:2022-05-16

摘要/Abstract

摘要： Φ8～20 mm 38CrMoAl钢(/%:0.35～0.42C,0.20～0.45Si,0.30～0.60Mn,≤0.035P,≤0.035S,1.35～1.65Cr,0.15～0.25Mo,0.70～1.10Alt)的生产工艺为90 t转炉-LF-VD-150 mm×150 mm方坯连铸-连轧。分析了成分、轧制温度、冷却速度对38CrMoAl钢组织的影响。通过将铸坯加热温度、开轧温度和吐丝温度分别由(1100±40)℃,(1020±20)℃(和(900±15)℃降至(1060±40)℃,(980±20)℃和(840±15)℃,同时降低冷却线辊道速度,盘条HB硬度值由284～353降至221～254,显著降低冷拔过程的断丝率。

Abstract: The production process of Φ8 ~20 mm coil of steel 38CrMoAl (/% : 0.35 ~0.42C, 0.20 ~ 0.45Si, 0.30 ~0.60Mn, ≤ 0.035P, ≤ 0.035S, 1.35 ~ 1.65Cr, 0.15 〜0.25Mo, 0.70 〜1.l0Alt) is 90 t converter-LF-VD-150 mm X 150 mm billet casting-continuous rolling. The effect of chemical composition, rolling temperature and cooling speed on structure of steel 38CrMoAl has been analyzed. With decreasing the billet heating temperature, beginning rolling temperature and coil laying-off temperature respectively from (1100±40)℃, (1 020 ± 20 )℃ and ( 900 土 15)℃ to (1 060 ± 40)℃,(980 ±20)℃ and (840 ± 15)℃ , the HB hardness scale of coil decreases from 284 〜353 to 221 〜254 obviously to decrease the wire breakage rate in cold drawing process of coil.

马志军. 控轧控冷对38CrMoAl钢盘条硬度的影响和工艺优化[J]. 特殊钢, 2019, 40(3): 35-38.

Ma Zhijun. Effect of Control Rolling and Cooling on Hardness of Steel 38CrMoAl Coil and Optimization of Process[J]. Special Steel, 2019, 40(3): 35-38.