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南通宝钢钢铁有限公司,南通,226002
[ "杨钢铁(1958-),男,工程师,1981年西安建筑学院(本科)毕业,炼钢工艺研究。" ]
收稿:2013-10-11,
网络首发:2022-09-09,
纸质出版:2014-09-09
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杨钢铁. 50 t EBT EAF-LF( VD) -CC 流程冶炼 25MnB 钢终点B控制的工艺实践[J]. 特殊钢, 2014,35(2):37-39.
杨钢铁. Process Practice for End B Control of Steel 25MnB Steelmaking by 50 t EBT EAF-LF(VD)-CC Flow Sheet[J]. Special Steel, 2014, 35(2): 37-39.
杨钢铁. 50 t EBT EAF-LF( VD) -CC 流程冶炼 25MnB 钢终点B控制的工艺实践[J]. 特殊钢, 2014,35(2):37-39. DOI:
杨钢铁. Process Practice for End B Control of Steel 25MnB Steelmaking by 50 t EBT EAF-LF(VD)-CC Flow Sheet[J]. Special Steel, 2014, 35(2): 37-39. DOI:
通过电弧炉配加25~36 t/炉铁水
出钢加100 kg铝铁预脱氧
LF精炼过程精炼渣碱度≥4
喂Al线(目标0.015%Al)后加钛铁(目标0.04%Ti)
VD后加硼铁
软吹氩5~10 min
连铸全程保护浇铸等工艺措施
25炉25MnB钢(/%:0.23~0.28C,0.15~0.35Si,1.00~1.30Mn,0.0005~0.0030B,≤0.065Ti)Φ180 mm圆坯的O含量为8×10
-6
~13×10
N含量为30×10
~49×10
B含量0.0015%~0.0024%
B的回收率可达90%
有效地改善了B的控制精度和25MnB钢成品B的命中率。
With the process measures including EAF charging hot metal 25-36 t/heat
during tapping adding 100 kg ferroaluminium to pre-deoxidizing
controlling refining slag basicity ≥ 4 during LF refining
after feeding Al wire ( aim 0.015% Al) adding ferrotitanium (aim 0.04%Ti)
after VD adding ferroboron and soft argon blowing for 5-10 min
and whole process shielding casting
the 25 heats production results show that in Φ180 mm round billet of steel 25MnB (/% : 0.23 ~0.28C
0.15-0.35Si
1.00-1.30Mr
0.0005-0.0030B,≤0.065Ti) the oxygen content is 8 x 10
-13 x 10
the nitrogen content is 30 x 10
-49 x 10
and the boron content is 0.0015% -0.0024%
and the yield of boron is up to 90%
it is available to improve the control extent of boron content and the hitting accur
acy of B in finishing steel 25MnB.
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