学术
开坯工艺对易切削奥氏体不锈钢坯表面开裂的影响
李壮[1,2] 吴迪[1] 齐瑞贵[3]
[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
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30kg真空感应炉冶炼，φ450mm轧机经8道次开坯成75mm×75mm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。[著者文摘]
文章出处:
《特殊钢》-2008年1期 -37-39页
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相关文章:
Effect of Breakdown Process on Surface Cracking of Billet of Free Cutting Austenite Stainless Steel
Li Zhuang, Wu Di and Qi Ruigui （1 State Key Lab of Rolling and Automation, Northeastern University, Shenyang 110004; 2 Dept of Materials Engineering, Shenyang Institute of Aeronautical Engineering, Shenyang 110034; 3 Dept of Machine and Automobile, Shenyang Institute of Aeronautical Engineering, Shenyang 110034）
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. llS, 9. 14 -9.20Ni, 18. 12 -18.30Cr, 0. 73 -0. 78Ti） was melted by a 30 kg vacuum induction furnace and broken down to 75 mm x 75 mm billet with 8 pass by a （φ450 mm mill, As steel ingot was heated to 1 200 ℃ and rolled at 1 150 - 1 060℃ in 1 -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 with 1 - 8 oass at 1 150 - 1 060 ℃.[著者文摘]
Key words:
Sulphur, Free Cutting, Austenite Stainless Steel, Cracking, Hot Rolling Process
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