双辊薄带连铸高速钢铸带中碳化物的形成及演变
Formation and Evolution of Carbides in High Speed Steel Cast-strip Produced by Twin-roll Strip Casting
摘 要
采用光学显微镜观察了在工业双辊薄带连铸机上制备的M2高速钢铸带中的碳化物,利用二次枝晶间距计算了铸带的凝固速率;并用扫描电镜和透射电镜研究了高温热处理后铸带中亚稳相M2C碳化物的演变情况.结果表明:双辊薄带连铸高速钢工业铸带的凝固速率为1.7×103 K·s-1,比实验室铸带的5.4×102 K·s-1高一个数量级,远远高于工业铸锭的2×10-1 K·s-1;双辊薄带连铸工艺可以细化高速钢铸带中的共晶碳化物,并获得较多的亚稳相M2C碳化物,在高温热处理过程中M2C碳化物与部分奥氏体反应生成稳定相M6C和MC碳化物,使碳化物分布更加均匀弥散.
高速钢
碳化物
亚稳相
twin-roll strip casting
high speed steel
carbide
metastable phase
Abstract
The carbides in M2 high speed steel cast-strip produced by industrial twin-roll castor was studied by means of optical microscopy.The cooling rate of M2 industrial cast-strip was calculated according to the secondary dendrites space.The evolution of metastable phase M2C carbides in M2 cast-strip after heat-treatment was investigated by means of SEM and TEM.The results showed that the cooling rate in industrial twin-roll casting was 1.7×103 K·s-1,faster than that in laboratorial twin-roll casting (5.4×102 K·s-1) and in industrial casting(2×10-1 K·s-1).The twin-roll strip casting technology could refine the eutectic carbides in cast-strip and more metastable phase of M2C carbides could be obtained by this technology.The carbides in M2 cast-strip could be refined and homogenized by the decomposing of metastable phase M2C carbides during heat-treatment.
中图分类号 TG142.4
所属栏目 试验研究
基金项目 高校博士基金资助项目(教技发中心函[2001]156号);重庆市科委重点资助项目(2000-6539)
收稿日期 2007/11/7
修改稿日期 2008/3/2
网络出版日期
作者单位点击查看
备注张彩东(1979-),男,河北迁安人,助理研究员,博士研究生.
引用该论文: ZHANG Cai-dong,DING Pei-dao,JIANG Bin,ZHOU Shou-ze. Formation and Evolution of Carbides in High Speed Steel Cast-strip Produced by Twin-roll Strip Casting[J]. Materials for mechancial engineering, 2008, 32(11): 31～33
张彩东,丁培道,蒋斌,周守则. 双辊薄带连铸高速钢铸带中碳化物的形成及演变[J]. 机械工程材料, 2008, 32(11): 31～33
共有人对该论文发表了看法，其中：
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】Spinelli J E,Tosetti J P.Microstructure and solidification thermal parameters in thin strip continuous casting of a stainless steel[J].Materials Processing Technology,2004,150:255-262.
【2】王定武.以普通碳素钢为突破口Castrip薄带连铸取得重大进展[J].冶金管理,2007(1):52-54.
【3】尹嵬.Nucor公司Crawfordsville厂薄带连铸的商业化进展[J].太钢译文,2006(4):30-35.
【4】Boccalini M,Goldenstein H.Solidification of high speed steels[J].International Materials Reviews,2001,46(2):92-115.
【5】Cook R,Grocock P G.Progress in direct strip casting[J].Steel Times,1999,55(4):23-26.
【6】Opalka W A.Direct strip casting developments quicken[J].Iron Making & Steel Making,1999(2):39-40.
【7】郭耕三.高速钢及其热处理[M].北京:机械工业出版社,1985.
【2】王定武.以普通碳素钢为突破口Castrip薄带连铸取得重大进展[J].冶金管理,2007(1):52-54.
【3】尹嵬.Nucor公司Crawfordsville厂薄带连铸的商业化进展[J].太钢译文,2006(4):30-35.
【4】Boccalini M,Goldenstein H.Solidification of high speed steels[J].International Materials Reviews,2001,46(2):92-115.
【5】Cook R,Grocock P G.Progress in direct strip casting[J].Steel Times,1999,55(4):23-26.
【6】Opalka W A.Direct strip casting developments quicken[J].Iron Making & Steel Making,1999(2):39-40.
【7】郭耕三.高速钢及其热处理[M].北京:机械工业出版社,1985.
相关信息
