| 开坯工艺对易切削奥氏体不锈钢坯表面开裂的影响 |
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| 引用本文： | 李壮,吴迪,齐瑞贵.开坯工艺对易切削奥氏体不锈钢坯表面开裂的影响[J].特殊钢,2008,29(1):37-39. |
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| 作者姓名： | 李壮 吴迪 齐瑞贵 |
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| 作者单位： | 1东北大学轧制技术及连轧自动化国家重点实验室，沈阳110004;
2沈阳航空工业学院材料工程系，沈阳110034;
3沈阳航空工业学院机械与汽车学院，沈阳110034 |
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| 摘 要： | 易切削奥氏体不锈钢(%:0.09～0.10C、0.80～0.82Si、0.40～0.43Mn、0.08～0.09P、0.10～0.11S、9.14～9.20Ni、18.12～18.30Cr、0.73～0.78Ti)由30 kg真空感应炉冶炼,Φ450 mm轧机经8道次开坯成75 mm×75 mm坯。当钢锭加热温度1200℃,1～4道次(1150～1060℃)轧制未出现开裂,5～8道次(950～770℃)轧制钢坯出现严重表面裂纹。扫描电镜与能谱分析表明,钢中夹杂物为硫化锰-硫化铁复合夹杂物。通过将1～8道次开坯温度控制在1150～1060℃时,有效地避免了钢坯表面开裂的发生。
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| 关 键 词： | 硫 易切削 奥氏体不锈钢 开裂 热轧工艺 |
| 收稿时间： | 2007-07-16 |
| 修稿时间： | 2007年7月16日 |
Effect of Breakdown Process on Surface Cracking of Billet of Free Cutting Austenite Stainless Steel |
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| Li Zhuang,Wu Di,Qi Ruigui.Effect of Breakdown Process on Surface Cracking of Billet of Free Cutting Austenite Stainless Steel[J].Special Steel,2008,29(1):37-39. |
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| Authors: | Li Zhuang Wu Di Qi Ruigui |
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| Affiliation: | 1 State Key Lab of Rolling and Automation,Northeastem University,Shenyang 110004;
2 Dept of Materials Engincering,Shenyang Institute of Aeronautical Engineering,Shenyang 110034;
3 Dept of Machine and Automobile,Shenyang Institute of Aeronautical Engineering,Shenyang 110034 |
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| Abstract: | The free cutting austenite stainless steel(0.09~0. 10C,0.80~0.82Si,0.40~0.43Mn,0.08~0.09P, 0. 10~0. 11S,9. 14~9.20Ni,18.12～18.30Cr,0.73~0.78Ti)was melted by a 30 kg vacuum induction furnace and broken down to75 mm×75 mm billet with8 pass by a φ450 mm mill.As steel ingot was heated to 1200 ℃ and rolled at 1150~1060℃ in1~4 pass there was not cracking on billet surface but continuously rolled at 950~770 ℃ in 5~8 pass the serious surface cracking of billet occurred. The SEM analysis results indicated that inclusion in steel was mainly manga- nese sulphide - iron sulphide compounded inclusions.The steel billet cracking has been effectively avoided by controlling breakdown with1~8 pass at 1150~1060 ℃. |
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| Keywords: | Sulphur Free Cutting Austenite Stainless Steel Cracking Hot Rolling Process |
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