40t EAF-LF-VD-3.7t铸锭工艺高品质齿轮钢20MnCr5H-1的研制  

Development of High Quality Gear Steel 20MnCr5H-1 by 40 t EAF-LF-VD-3.7 t Ingot Casting Process

作　　者：丁忠[1] 宋建萍[1] 林俊[1] 

机构地区：[1]宝钢特钢有限公司制造管理部,上海200940

出　　处：《特殊钢》2014年第5期50-51,共2页Special Steel

摘　　要：采用40 t电弧炉-LF-VD-3.7 t锭模铸-轧制工艺开发了20MnCr5H-1高品质齿轮钢（/%：0.17-0.22C,≤0.12Si,1.0-1.5Mn,≤0.035P,0.015-0.035S,0.8-1.3Cr,≤0.0020O,0.015-0.045A1）-Φ80 mm材。通过控制EAF终点[P]≤0.015%,LF精炼渣碱度≥2.5,并调整钢中元素含量,VD处理、喂硫线等工艺措施,试制的5炉20MnCr5H-1钢的成分为（/%）：0.16-0.20C,0.05-0.12Si,1.20-1.30Mn,0.009-0.025P,0.020-0.035S,1.00-1.10Cr,0.000 8-0.001 5O,0.015-0.040Al,淬透性带宽AHRC为4,各项指标均满足要求。The Ф80 mm rolled product of high quality gear steel 20MnCr5H-1 for car （/% ： 0. 17 - 0. 22C, ≤ 0. 12Si, 1.0 - 1.5Mn, ≤0. 035P, 0. 015 - 0. 035S, 0. 8 - 1.3Cr, ≤0. 002 00, 0. 015 - 0. 045A1） has been developed by 40 t EAF- LF- VD- 3.7 t ingot casting-rolling process. With the process measures including controlling EAF end [ P] ≤ 0. 015%, LF refining slag basicity ≥2. 5 and adjusting content of elements in steel, VD treating and feeding sulphur wire, the analysis of 5 heats steel 20MnCr5H-1 is （/% ： ） 0. 16- 0. 20C, 0. 05 - 0. 12Si, 1.20 - 1.30Mn, 0. 009 - 0. 025P. 0. 020 - 0. 035S, 1.00 - I. lOCr, 0.000 8 - 0.00150, 0. 015 - 0. 040A1, hardenability band width AHRC 4, and each index all meets the requirement.

关 键 词：20MnCr5H-1齿轮钢 40t EAF-LF-VD-3.7t铸锭工艺 淬透性带 氧含量 

分 类 号：TF76[冶金工程—钢铁冶金]