| 汽车零部件用45Mn2R硫系易切削钢的开发 |
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| 引用本文： | 梁娜,刘永昌,王升. 汽车零部件用45Mn2R硫系易切削钢的开发[J]. 特殊钢, 2022, 43(5): 51-54 |
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| 作者姓名： | 梁娜 刘永昌 王升 |
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| 作者单位： | 山东钢铁股份有限公司，莱芜 271105 |
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| 摘 要： | 采用≥40%铁水-50 t EAF-LF-VD-180 mm×220 mm铸坯-轧制流程开发了45Mn2R钢Φ40～50 mm轧材。通过控制EAF终点[C]≥0.10%,[P]≤0.015%,出钢温度1620～1660℃,出钢过程用“增碳剂+复合脱氧剂(15%Ca-12%Al-45%Si)+合成渣(50%CaO-34%Al2O3-4%MgO)”预脱氧，Ca处理前钢水S含量≤0.010%,Ca处理20 min后喂S线，VD后软吹25～30 min等工艺措施，提升钢的纯净度和可浇性。结果表明，生产的45Mn2R钢(/%:0.43～0.46C,0.22～0.27Si, 0.009～0.017P,0.065～0.086S,0.32～0.36Cr, 0.003～0.010Ti, 0.013～0.034Als)具有良好的综合性能，各项指标满足用户要求。
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| 关 键 词： | 45Mn2R硫系易切削钢 ≥40%铁水-50 t EAF-LF-VD-CC流程 硫化物控制 洁净度 |
| 收稿时间： | 2022-03-08 |
Development of 45Mn2R Sulfur Free-Cutting Steel for Automobile Parts |
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| Liang Na,Liu Yongchang,Wang Sheng. Development of 45Mn2R Sulfur Free-Cutting Steel for Automobile Parts[J]. Special Steel, 2022, 43(5): 51-54 |
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| Authors: | Liang Na Liu Yongchang Wang Sheng |
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| Affiliation: | Shandong Iron and Steel Company Ltd. , Laiwu 271105 |
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| Abstract: | The 45Mn2R steel Φ40-50 mm rolled product is developed by ≥ 40% hot metal- 50 t EAF-LF-VD-180 mm x 220 mm cast billet-rolling flow sheet. The cleanliness and casting ability are improved by controlling EAF end [C] ≥ 0.10% ,[P] ≤ 0.015% , tapping temperature 1 620-1 660 °C , preliminay deoxidation using " recaburizing agent + (15%Ca-12%Al-45%Si) compound deoxidation reagent + (50%CaO-34%A12O3-4%MgO) synthetic slag" during tap ping, S content in metal ≤ 0.010% before Ca treatment, feeding S wire after Ca treatment for 20 min, soft blowing for 20 min after VD etc process measure. Results show that produced 45Mn2R steel (/% : 0.43-0.46C, 0.22-0.27Si, 0.009-0.017P, 0.065-0.086S, 0.32-0.36Cr, 0.003-0.010Ti, 0.013-0.034AIs) has better comprehensive properties to meet user requirement. |
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| Keywords: | 45Mn2R Sulfur Free-Cutting Steel ≥ 40% Hot Metal-50 t EAF-LF-VD-CC Flowsheet Sulphide Control Cleanliness |
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