李新强,赵升吨,丘铭军,等.铁素体不锈钢430连续铸造板坯成形合理工艺参数的研究[J].精密成形工程,2024,16(7):239-245.
LI Xinqiang,ZHAO Shengdun,QIU Mingjun,et al.Reasonable Process Parameters for Continuous Casting of Ferritic Stainless Steel 430 Continuous Casting Billets[J].Journal of Netshape Forming Engineering,2024,16(7):239-245. |
| 铁素体不锈钢430连续铸造板坯成形合理工艺参数的研究 |
| Reasonable Process Parameters for Continuous Casting of Ferritic Stainless Steel 430 Continuous Casting Billets |
| 投稿时间：2024-05-31 |
| DOI：10.3969/j.issn.1674-6457.2024.07.022 |
| 中文关键词: 铁素体不锈钢430 连铸板坯 工艺参数 铸坯成形 等轴晶率 |
| 英文关键词: ferritic stainless steel 430 continuous casting slab process parameters casting billet forming equiaxed grain rate |
| 基金项目:国家自然科学基金(519705449);陕西省秦创原“科学家+工程师”队伍建设(2023KXJ-151) |
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| 中文摘要: |
| 目的 以某钢厂板厚为180~220 mm的铁素体不锈钢430连铸板坯为对象，研究合理的板坯连铸工艺参数，以提高不锈钢430连铸坯的等轴晶率，强化铸坯质量。方法 通过高温拉伸试验、结晶器凝固冷却温度分析以及电磁搅拌磁感应强度模拟，探讨了液体加热温度、结晶器冷却水参数及电磁搅拌参数等工艺参数对连铸坯质量的影响规律。结果 高温拉伸试验结果表明，430不锈钢在不同温度下的应力-应变曲线都是典型的塑性拉伸曲线，当温度超过1 000 ℃后，抗拉强度显著减小;在结晶器宽面水量3 400 L/min、窄面水量400 L/min的参数条件下，结晶器宽面及窄面铜板温度均匀，满足铸坯成形要求;在扇形1段第6#和7#辊位并列增加电磁搅拌辊后，430不锈钢铸坯电磁场分布合理且铸坯中心磁感应强度最大，为0.104 T，平均磁感应强度为0.09 T，显著提升了液相穴内钢水的流动性。结论 在结晶器宽面水量为3 400 L/min、窄面水量为400 L/min条件下，在连铸机扇形1段第6#和7#辊位并列增加电磁搅拌辊后，对430不锈钢进行连续铸造工业试验，铁素体不锈钢430板坯等轴晶率达到62.5%，裂纹发生率降低。 |
| 英文摘要: |
| The work aims to study the continuous casting process parameters of ferritic stainless steel 430 continuous casting slabs with a thickness of 180-220 mm to improve the equiaxed grain rate of the stainless steel 430 continuous casting slabs and strengthen the quality of the slabs. The influence of process parameters such as liquid heating temperature, crystallizer cooling water parameters, and electromagnetic stirring parameters on the quality of continuous casting billets was explored through high-temperature tensile tests, analysis of crystallizer solidification cooling temperature, and simulation of electromagnetic stirring magnetic induction intensity. The high-temperature tensile test clearly showed that the stress-strain curves of 430 stainless steel at different temperature were typical plastic tensile curves. After the temperature exceeded 1 000 ℃, the tensile strength significantly decreased; Under the parameter conditions of 3 400 L/min wide surface water volume and 400 L/min narrow surface water volume in the crystallizer, the temperature of the wide and narrow surface copper plates in the crystallizer was uniform, meeting the requirements for billet forming; After adding electromagnetic stirring rollers in parallel at the 6th and 7th roller positions in sector 1, the electromagnetic field distribution of the 430 stainless steel billet was reasonable, and the maximum magnetic induction intensity at the center of the billet was 0.104 T, with an average magnetic induction intensity of 0.09 T, significantly improving the fluidity of molten steel in the liquid phase cavity. In conclusion, when conducting continuous casting industrial experiments on 430 stainless steel through a crystallizer with a wide surface water flow rate of 3 400 L/min and a narrow surface water flow rate of 400 L/min by adding electromagnetic stirring rollers in parallel at the 6th and 7th roller positions of the first section of the continuous casting machine, the equiaxed grain rate of the ferritic stainless steel 430 slab reaches 62.5%, and the crack occurrence rate is reduced. |
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