| 250 mm铸坯红送工艺生产Nb-V-Ti微合金钢板表面裂纹分析 |
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| 引用本文： | 曹磊,王国连. 250 mm铸坯红送工艺生产Nb-V-Ti微合金钢板表面裂纹分析[J]. 特殊钢, 2018, 39(4): 55-57 |
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| 作者姓名： | 曹磊 王国连 |
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| 作者单位： | 秦皇岛首秦金属材料有限公司,秦皇岛066000 |
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| 摘 要： | 利用金相观察、能谱分析、连铸坯红送与冷送工艺的对比试验等手段，对红送工艺生产微合金钢板出现的表面裂纹进行了分析研究。结果表明,红送工艺生产微合金钢板表面裂纹并不是因为连铸坯本身存在裂纹缺陷，而是由于铸坯在凝固后的冷却过程中，大量细小的C、N化合物在奥氏体晶界析出，降低了晶界强度，导致钢板表面裂纹形成。
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| 关 键 词： | Nb-V-Ti微合金钢 红送 表面裂纹 |
| 收稿时间： | 2018-02-10 |
Investigation of Surface Crack of Nb-V-Ti Micro-Alloyed Steel Plate by 250 mm Casting Slab Hot Charging Process |
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| Cao Lei,Wang Guolian. Investigation of Surface Crack of Nb-V-Ti Micro-Alloyed Steel Plate by 250 mm Casting Slab Hot Charging Process[J]. Special Steel, 2018, 39(4): 55-57 |
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| Authors: | Cao Lei Wang Guolian |
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| Affiliation: | Qinhuangdao Shouqin Metal Material Co., Ltd. , Qinhuangdao 066000 |
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| Abstract: | Surface crack on micro-alloyed steel plate produced by hot charging process was investigated by means of metallographic analysis, energy spectrometer analysis and contrast test of HCR and CCR. The results show that the main factors of surface crack on micro-alloyed steel plate produced by hot charging process are not the cracks on slab but the precipitation of a large of fine carbon and nitrogen compound at the boundary of the austenite grains,which decreases the strength of the grain boundary sharply. |
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