CSP-低碳冷轧薄板组织与性能的研究
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摘要
本论文以涟钢CSP热轧基板生产冲压用冷轧薄板DC03钢为研究对象,分析了化学成分、终轧温度及卷取温度对产品组织和性能的影响,对热轧、冷轧及退火平整组织和织构进行了分析,观察了其组织及织构的演变。研究结果为涟钢制定DC03低碳冷轧深冲板的生产工艺提供了借鉴。论文的主要研究工作包括:
1、统计分析了涟钢DC03钢热轧板和冷轧板力学性能特征,并与国内一些厂家的DQ级产品进行对比了分析,为涟钢深冲板在全国同类产品中的定位提供了依据,认识了其性能的劣势和优势;
2、通过大生产实验,统计分析了涟钢DC03钢化学成分、终轧温度、卷取温度等工艺参数对产品性能质量的影响规律,优化了涟钢CQ级、冲压DQ级冷轧薄板的冶炼、热轧工艺制度;
3、研究了不同终轧温度和卷取温度下DC03钢热轧基板组织的变化,同时对DC03热轧基板、冷硬板及退火平整板组织及织构进行了分析,观察了其组织与织构的演变;
研究结果表明,在涟钢的化学成分控制标准上适当的增加Al元素的含量和减少C、Si、Mn元素的含量,且在CSP轧制中采用高温终轧和低温卷取有利于DC03成品板深冲性能的提高。组织分析表明,低温终轧、高温卷取下得到的DC03热轧基板组织不利于产品深冲性能的提高。DC03热轧基板、冷硬板、成品板的组织和织构之间存在一定的联系,原始状态的冷硬板织构在一定程度上影响到退火织构的演变结果。
The thesis regards CSP low carbon cold-rolled sheet DC03 steel of Lianyuan Iron and Steel Company as the research object, and analyses the effect of chemical composition , finishing temperature and coiling Temperature on microstructure and performance of products , the microstructures and texture of hot-rolled plate, cold-rolled plate and anneals plate were analysed,the evolution of microstructures and texture which were observed.the result offer basis for Lianyuan Iron and Steel Company on establishing technology of production of DC03 steel.The main research content of the thesis includes:
1. The mechanics performance of the hot-rolled plate and cold-rolled plate of DC03 steel of Lianyuan Iron and Steel Company is statistically analysised.and compare with DQ grade products of some domestic company and analyse,which offer basis about the localization of deep-drawing plate of Lianyuan Iron and Steel Company in the like products in the whole country, realizing the defect and advantage of its products;
2. Through statistical analysis to the data of production of CSP low carbon cold–rolled sheet of Lianyuan Iron and Steel Company.effects of chemical composition,coiling Temperature,finishing temperature on drawability of CSP low carbon cold–rolled sheet were studied,the technology system of refining and hot rolling for CQ and DQ products were optimized.
3. The variation of the hot–rolled base plate microstructures under different coiling temperature and finishing temperature was observed, and the microstructrue、second-phase and texture of hot-rolled base plate、chill plate and annealed sheet for CSP low carbon cold-rolled sheet were also studied.
The results show that, according to the control standard of chemical composition, increasing Al content,decreaseing C、Si、Mn content properly,and adopting high finishing temperature and low coiling temperature were propitious to the improvement of drawability. The microstructures of hot-rolled plate under low finishing temperature and high coiling temperature is unfavourable for drawability.The contact of microstructrue and texture between hot-rolled base plate、chill plate and annealed sheet exists,the annealing texture is effected by the chill plate texture.
1、统计分析了涟钢DC03钢热轧板和冷轧板力学性能特征,并与国内一些厂家的DQ级产品进行对比了分析,为涟钢深冲板在全国同类产品中的定位提供了依据,认识了其性能的劣势和优势;
2、通过大生产实验,统计分析了涟钢DC03钢化学成分、终轧温度、卷取温度等工艺参数对产品性能质量的影响规律,优化了涟钢CQ级、冲压DQ级冷轧薄板的冶炼、热轧工艺制度;
3、研究了不同终轧温度和卷取温度下DC03钢热轧基板组织的变化,同时对DC03热轧基板、冷硬板及退火平整板组织及织构进行了分析,观察了其组织与织构的演变;
研究结果表明,在涟钢的化学成分控制标准上适当的增加Al元素的含量和减少C、Si、Mn元素的含量,且在CSP轧制中采用高温终轧和低温卷取有利于DC03成品板深冲性能的提高。组织分析表明,低温终轧、高温卷取下得到的DC03热轧基板组织不利于产品深冲性能的提高。DC03热轧基板、冷硬板、成品板的组织和织构之间存在一定的联系,原始状态的冷硬板织构在一定程度上影响到退火织构的演变结果。
The thesis regards CSP low carbon cold-rolled sheet DC03 steel of Lianyuan Iron and Steel Company as the research object, and analyses the effect of chemical composition , finishing temperature and coiling Temperature on microstructure and performance of products , the microstructures and texture of hot-rolled plate, cold-rolled plate and anneals plate were analysed,the evolution of microstructures and texture which were observed.the result offer basis for Lianyuan Iron and Steel Company on establishing technology of production of DC03 steel.The main research content of the thesis includes:
1. The mechanics performance of the hot-rolled plate and cold-rolled plate of DC03 steel of Lianyuan Iron and Steel Company is statistically analysised.and compare with DQ grade products of some domestic company and analyse,which offer basis about the localization of deep-drawing plate of Lianyuan Iron and Steel Company in the like products in the whole country, realizing the defect and advantage of its products;
2. Through statistical analysis to the data of production of CSP low carbon cold–rolled sheet of Lianyuan Iron and Steel Company.effects of chemical composition,coiling Temperature,finishing temperature on drawability of CSP low carbon cold–rolled sheet were studied,the technology system of refining and hot rolling for CQ and DQ products were optimized.
3. The variation of the hot–rolled base plate microstructures under different coiling temperature and finishing temperature was observed, and the microstructrue、second-phase and texture of hot-rolled base plate、chill plate and annealed sheet for CSP low carbon cold-rolled sheet were also studied.
The results show that, according to the control standard of chemical composition, increasing Al content,decreaseing C、Si、Mn content properly,and adopting high finishing temperature and low coiling temperature were propitious to the improvement of drawability. The microstructures of hot-rolled plate under low finishing temperature and high coiling temperature is unfavourable for drawability.The contact of microstructrue and texture between hot-rolled base plate、chill plate and annealed sheet exists,the annealing texture is effected by the chill plate texture.
引文
[1] 佟强. 钢板深冲性能的实验研究[D]. 沈阳:东北大学,2003.
[2] 马鸣图. 我国汽车钢板研究与应用进展[J]. 钢铁,2001, 36(8):64-69.
[3] 王章忠. 新型冲压用钢的开发与展望[J]. 机械工程材料, 2003, 27(3):45-47.
[4] Ray R K,Jonas J J,Hook R E. Cold rolling and annealing textures in low carbon and extra low carbon steels[J].Internal mateirals Reviews,1994,39(4):126-129.
[5] Bhekwede D J. Strain hardening and anisotropy[J].Metal progress,1969,95(1):83-85.
[6] 庄权华. St15深冲钢再结晶规律研究与应用[D]. 沈阳:东北大学,2002.
[7] Weng Yuqing.Ultrafine Grained Steel[M].Beijing:Metallurgical Industry Press,2003.56-57.
[8] 邢峰. 本钢深冲板深冲性能的实验研究[D]. 北京:北京科技大学,2002.
[9] 吴光亮,郑柏平,焦国华,等。涟钢CSP连铸连轧流程的技术装备和生产实践[J]. 特殊钢, 2006, 27(2):46-48.
[10] 王有铭,李曼玉,韦光.钢材的控制轧制和控制冷却[M]. 北京:冶金工业出版社,1993.127-128.
[11] 康永林. 现代汽车板的质量控制与成形性[M]. 北京:冶金工业出版社,1999.
[12] 崔勇. 工艺参数对Ti-IF钢组织和性能的影响[D]. 沈阳:东北大学,2003.
[13] 张举东. 冷轧薄板与冲压成形性[J]. 模具技术,2001, 1: 47-49.
[14] Kang Yonglin,Yu Hao,Wang Zhongbing,eta1.Study of Microstructure Evolution and Strengthening Mechanism of Low Carbon Steel Produced by CSP Line[J].Iron and Steel,2003,38(8):2O一26.
[15] 赵广东,康海军,吕忠萍. 冷轧薄板成形性能研究的内容和方法[J]. 本钢技术,2006, 3: 17-21.
[16] 于浩. CSP热轧低碳钢板组织细化与强化机理研究[D]. 北京:北京科技大学,2003.
[17] 张云祥, 徐光, 赵刚,等. CSP与常规热轧工艺生产Q345B钢带的组织性能对比[J]. 钢铁研究,2007,35(1):30-32.
[18] Liu Qingyou,Sun Xinjun,Li Degang,eta1.Microstructure Evolution of Mild Carbon Steel During CSP Continuous Rolling[J].Iron and Steel,2003,38(7):12-15.
[19] Liu Delu,Fu Jie,Kang Yonglin,eta1. Oxide and SulfideDispersive Precipitation and Effects on Microstructure and Properties of Carbon Steels[J].J Mat Sci Tech,2002,18(1):7-9.
[20] 屠永刚. 本钢深冲板深冲机理的实验研究[D]. 北京:北京科技大学,2001.
[21] Cramb A W.New Steel Casting Process for Thin Slab and Strip a Histoircal Perspcetive[J].I&SM,1988,7:45—60.
[22] Yu Hao,Kang Yonglin,Wnag Kelu,etaL.Continuously Cooling Transformation and Microstructure Refinement of Thin Slab of low Carbon Steel Produced by CSP [J].Journalof Iron and steel Research,2002,14(1):42—46.
[23] 闫志波. 冷轧薄板冲压性能的影响因素[J]. 石家庄职业技术学院学报, 2006, 18(2): 14-16.
[24] 李晋霞, 刘相华, 王国栋. 钢板深冲性与织构研究的进展[J]. 钢铁研究,2001, 3: 56-61.
[25] 谢华. 高延伸率热轧深冲钢的生产实践[J]. 轧钢,2001,17(2):22-24.
[26] 杨旭生. t14深冲板生产工艺研究[D]. 沈阳:东北大学,2004.
[27] Liu Qinygou,Sun Xinjun,Chen Hongjun,etal.Microstructure Evolution of Mild Carbon Steel during CSP Continuous Rolling[J].Iron and Steel,2003,38(7):12—15.
[28] 孙景宏. 微碳深冲钢板组织演变规律和工艺优化的研究[D]. 北京:北京科技大学,2005.
[29] 李叙生. 热轧工艺对超深冲用钢性能影响研究[D]. 北京:北京科技大学,2001.
[30] 马水明. 邯钢CSP热轧酸洗深冲板SPHD的研究开发[D]. 武汉:武汉科技大学硕士论文,2007.
[31] 周乐育. 深冲板St15织构演变的实验研究和计算机模拟[D]. 北京:北京科技大学,2004.
[32] 李艳娇. IF钢冷轧工艺参数与深冲性能关系的研究[D]. 唐山:河北理工学院. 2002.
[33] 毛伟民. 晶体材料织构定量分析[M]. 北京:冶金工业出版社,1995.
[34] Daniel D and Jonas J J. Measurement and Prediction of Plastic Anisotropy in Deep-Drawing Steels[J]. Metallurgical Transactions ,1990,21(2):331—343.
[35] Christian Klinkenberg,Dierk Raabe and Kurt Lucke.Influence of Volume Fraction and Dispersion Rate of Grain-Boundary Cementite on the Cold-Rolling Textures of Low -Carbon Steel[J]. Steel Research,1992,63(6):263—269.
[36] Martha Patricia,Butron Guilen,John J Jonas.Effect of Finishing Temperatrue on Hot Band Textures in an IF Steel[J].ISU International,1996,36(1):68—73.
[37] 胡玉和. 关于低碳深冲钢板中{111}织构的形成机制问题(二)[J]. 鞍钢技术,1990, 4:1-6.
[38] 柴海涛.CSP轧制过程温度对产品性能的影响[J].钢铁研究学报,2005,17:70-72.
[39] 孟延军.轧钢基础知识[M].北京:冶金工业出版社.
[40] 田德新.新型微碳冷轧深冲薄钢板03Al研制总结[R].武汉:武汉钢铁(集团)公司,1998.
[41] D.Ravi Kumar. Formability analysis of extra-deep drawing steel[J]. Journal of Materials Processing Technology,2002,130:31-41.
[42] 田德新,凤佩华.深冲08Al钢成分工艺对成品成形性的影响[J].钢铁研究,1994,6:22-25.
[43] G.Erdem,Y.Taptik. Effect of hot rolling conditions to produce deep drawing quality steels for continuous annealing process[J]. Journal of Materials Processing Technology,2005,170:17-23.
[44] J.Asensio,G.Romano,V.J.Martinez,etc. Ferritic steels Optimization of hot-rolled textures through cold rolling and annealing[J]. Materials Characterization,2001,47:119-127.
[2] 马鸣图. 我国汽车钢板研究与应用进展[J]. 钢铁,2001, 36(8):64-69.
[3] 王章忠. 新型冲压用钢的开发与展望[J]. 机械工程材料, 2003, 27(3):45-47.
[4] Ray R K,Jonas J J,Hook R E. Cold rolling and annealing textures in low carbon and extra low carbon steels[J].Internal mateirals Reviews,1994,39(4):126-129.
[5] Bhekwede D J. Strain hardening and anisotropy[J].Metal progress,1969,95(1):83-85.
[6] 庄权华. St15深冲钢再结晶规律研究与应用[D]. 沈阳:东北大学,2002.
[7] Weng Yuqing.Ultrafine Grained Steel[M].Beijing:Metallurgical Industry Press,2003.56-57.
[8] 邢峰. 本钢深冲板深冲性能的实验研究[D]. 北京:北京科技大学,2002.
[9] 吴光亮,郑柏平,焦国华,等。涟钢CSP连铸连轧流程的技术装备和生产实践[J]. 特殊钢, 2006, 27(2):46-48.
[10] 王有铭,李曼玉,韦光.钢材的控制轧制和控制冷却[M]. 北京:冶金工业出版社,1993.127-128.
[11] 康永林. 现代汽车板的质量控制与成形性[M]. 北京:冶金工业出版社,1999.
[12] 崔勇. 工艺参数对Ti-IF钢组织和性能的影响[D]. 沈阳:东北大学,2003.
[13] 张举东. 冷轧薄板与冲压成形性[J]. 模具技术,2001, 1: 47-49.
[14] Kang Yonglin,Yu Hao,Wang Zhongbing,eta1.Study of Microstructure Evolution and Strengthening Mechanism of Low Carbon Steel Produced by CSP Line[J].Iron and Steel,2003,38(8):2O一26.
[15] 赵广东,康海军,吕忠萍. 冷轧薄板成形性能研究的内容和方法[J]. 本钢技术,2006, 3: 17-21.
[16] 于浩. CSP热轧低碳钢板组织细化与强化机理研究[D]. 北京:北京科技大学,2003.
[17] 张云祥, 徐光, 赵刚,等. CSP与常规热轧工艺生产Q345B钢带的组织性能对比[J]. 钢铁研究,2007,35(1):30-32.
[18] Liu Qingyou,Sun Xinjun,Li Degang,eta1.Microstructure Evolution of Mild Carbon Steel During CSP Continuous Rolling[J].Iron and Steel,2003,38(7):12-15.
[19] Liu Delu,Fu Jie,Kang Yonglin,eta1. Oxide and SulfideDispersive Precipitation and Effects on Microstructure and Properties of Carbon Steels[J].J Mat Sci Tech,2002,18(1):7-9.
[20] 屠永刚. 本钢深冲板深冲机理的实验研究[D]. 北京:北京科技大学,2001.
[21] Cramb A W.New Steel Casting Process for Thin Slab and Strip a Histoircal Perspcetive[J].I&SM,1988,7:45—60.
[22] Yu Hao,Kang Yonglin,Wnag Kelu,etaL.Continuously Cooling Transformation and Microstructure Refinement of Thin Slab of low Carbon Steel Produced by CSP [J].Journalof Iron and steel Research,2002,14(1):42—46.
[23] 闫志波. 冷轧薄板冲压性能的影响因素[J]. 石家庄职业技术学院学报, 2006, 18(2): 14-16.
[24] 李晋霞, 刘相华, 王国栋. 钢板深冲性与织构研究的进展[J]. 钢铁研究,2001, 3: 56-61.
[25] 谢华. 高延伸率热轧深冲钢的生产实践[J]. 轧钢,2001,17(2):22-24.
[26] 杨旭生. t14深冲板生产工艺研究[D]. 沈阳:东北大学,2004.
[27] Liu Qinygou,Sun Xinjun,Chen Hongjun,etal.Microstructure Evolution of Mild Carbon Steel during CSP Continuous Rolling[J].Iron and Steel,2003,38(7):12—15.
[28] 孙景宏. 微碳深冲钢板组织演变规律和工艺优化的研究[D]. 北京:北京科技大学,2005.
[29] 李叙生. 热轧工艺对超深冲用钢性能影响研究[D]. 北京:北京科技大学,2001.
[30] 马水明. 邯钢CSP热轧酸洗深冲板SPHD的研究开发[D]. 武汉:武汉科技大学硕士论文,2007.
[31] 周乐育. 深冲板St15织构演变的实验研究和计算机模拟[D]. 北京:北京科技大学,2004.
[32] 李艳娇. IF钢冷轧工艺参数与深冲性能关系的研究[D]. 唐山:河北理工学院. 2002.
[33] 毛伟民. 晶体材料织构定量分析[M]. 北京:冶金工业出版社,1995.
[34] Daniel D and Jonas J J. Measurement and Prediction of Plastic Anisotropy in Deep-Drawing Steels[J]. Metallurgical Transactions ,1990,21(2):331—343.
[35] Christian Klinkenberg,Dierk Raabe and Kurt Lucke.Influence of Volume Fraction and Dispersion Rate of Grain-Boundary Cementite on the Cold-Rolling Textures of Low -Carbon Steel[J]. Steel Research,1992,63(6):263—269.
[36] Martha Patricia,Butron Guilen,John J Jonas.Effect of Finishing Temperatrue on Hot Band Textures in an IF Steel[J].ISU International,1996,36(1):68—73.
[37] 胡玉和. 关于低碳深冲钢板中{111}织构的形成机制问题(二)[J]. 鞍钢技术,1990, 4:1-6.
[38] 柴海涛.CSP轧制过程温度对产品性能的影响[J].钢铁研究学报,2005,17:70-72.
[39] 孟延军.轧钢基础知识[M].北京:冶金工业出版社.
[40] 田德新.新型微碳冷轧深冲薄钢板03Al研制总结[R].武汉:武汉钢铁(集团)公司,1998.
[41] D.Ravi Kumar. Formability analysis of extra-deep drawing steel[J]. Journal of Materials Processing Technology,2002,130:31-41.
[42] 田德新,凤佩华.深冲08Al钢成分工艺对成品成形性的影响[J].钢铁研究,1994,6:22-25.
[43] G.Erdem,Y.Taptik. Effect of hot rolling conditions to produce deep drawing quality steels for continuous annealing process[J]. Journal of Materials Processing Technology,2005,170:17-23.
[44] J.Asensio,G.Romano,V.J.Martinez,etc. Ferritic steels Optimization of hot-rolled textures through cold rolling and annealing[J]. Materials Characterization,2001,47:119-127.