Cause analysis of surface cracking of TA1 pure titanium cold rolled sheet
CHEN Rong, ZHANG Dafu, ZHANG Lei, YANG Liu
State Key Laboratory for Comprehensive Utilization of Vanadium and Titanium Resources, Pangang Group Resources Institute Co.,Ltd.,Panzhihua 617000,China
Abstract：Aiming at the surface cracking problem of TA1 pure titanium cold rolled sheet, the causes of cracking were analyzed by means of macroscopic analysis,scanning electron microscope(SEM),chemical analysis,optical microscope and microhardness tester.The results showed that the cracking of cold rolled sheet was located in the serious surface wrinkle area,and there was a hard α phase area in the center of the wrinkle area.The hard and brittle α phases formed by the enrichment of oxygen elements could not be deformed synchronously during the rolling process,leading to surface wrinkles with different degrees of internal cracking.The area with low oxygen enrichment formed shallow surface wrinkles,while the area with high oxygen enrichment formed serious surface wrinkles.At the same time,the abnormal enrichment of impurity Al elements in some hard α areas aggravated the embrittlement of materials,forming cleavage fracture.The internal cracking wrinkle defect in the sheet expanded to the macroscopic surface cracking in advance.
[1] 李政,陈从喜.全球钛资源行业发展现状[J].地球学报,2021,42(2):245-250. LI Zheng,CHEN Congxi.Development status of global titanium resources industry[J].Acta Geoscientica Sinica,2021,42(2):245-250. [2] 邱冠周,郭宇峰.我国钛金属工业的现状及发展趋势[J].国际矿物杂志,2022,29(4):599-610. QIU Guanzhou,GUO Yufeng.The present situation and development trend of titanium metal industry in China[J].International Journal of Minerals,2022,29(4): 599-610. [3] 安仲生,陈岩,赵巍.2021 年中国钛工业发展报告[J].钢铁钒钛,2022,43(4):1-9. AN Zhongsheng,CHEN Yan,ZHAO Wei.Report on China titanium industry in 2021 [J].Iron Steel Vanadium Titanium,2022,43(4):1-9. [4] 赵永庆.国内外钛合金研究的发展现状及趋势[J].中国材料进展,2010(5):1-8. ZHAO Yongqing.Current situation and development trend of titanium alloys[J].Materials China,2010(5):1-8. [5] 李明利,舒滢,冯毅江,等.我国钛及钛合金板带材应用现状分析[J].钛工业进展,2011,28(6):14-17. LI Mingli,SHU Ying,FENG Yijiang,et al.Application status on domestic titanium and titanium alloys plate and strip[J].Titanium Industry Progress,2011,28(6):14-17. [6] 王瑞琴,黄先明,吴晓东,等.冷轧钛板材缺陷分析与讨论[J].热加工工艺,2014,43(13):147-149. WANG Ruiqin,HUANG Xianming,WU Xiaodong,et al.Discussions and ananysis of defects for cold rolled titanium sheet[J].Hot Working Technology,2014,43(13):147-149. [7] 何龙,张海龙,张延生,等.对钛及钛合金板材表面“酸斑”的探讨[J].钛工业进展,2005,22(5):41-43. HE Long,ZHANG Hailong,ZHANG Yansheng,et al.Discussion on “etching trace” on plate/sheet surface of Ti and Ti alloy[J].Titanium Industry Progress,2005,22(5):41-43. [8] 付文杰,高维娜,蔡丹娜.轧制工艺对钛板质量的影响[J].热加工工艺,2015,44(19):137-139. FU Wenjie,GAO Weina,CAI Danna.Effects of rolling technologies on qualities of titianium plates[J].Hot Working Technology,2015,44(19):137-139. [9] 刘利香,马吉力,付振坡,等.开坯轧制钛板成材率影响因素及控制措施[J].宽厚板,2018,24(1):37-39. LIU Lixiang,MA Jili,FU Zhenpo,et al.Influencing factors and control measures of yield ratio for titanium plate rolled from ingot[J].Wide and Heavy Plate,2018,24(1):37-39. [10] 李渤渤,陈涛,刘茵琪,等.冷轧纯钛带分层缺陷分析[J].材料开发与应用,2015,30(5):35-39. LI Bobo,CHEN Tao,LIU Yinqi,et al.Analysis on delamination defects of cold rolled titanium strip[J].Development and Application of Materials,2015,30(5):35-39. [11] 杨柳.TA1纯钛冷轧薄板冲压过程开裂原因分析[J].塑性工程学报,2018,25(2):73-78. YANG Liu.Analysis on the causes of stamping cracking of TA1 pure titanium cold rolled sheet[J].Journal of Plasticity Engineering,2018,25(2):73-78. [12] 张家铭,余伟,张泽宇.工业纯钛热轧及冷轧板表面缺陷研究[J].金属功能材料,2020,27(1):8-15. ZHANG Jiaming,YU Wei,ZHANG Zeyu.Research on surface defects of commercially pure titanium hot-rolled and cold-rolled plates[J].Metallic Functional Materials,2020,27(1):8-15. [13] 黄德明,杨雄飞,韦青峰,等.TA17合金冷轧板材表面条状裂纹缺陷成因分析[J].钢铁钒钛,2013(1):26-30. HUANG Deming,YANG Xiongfei,WEI Qingfeng,et al.Cause analysis of strip cracks on surface of TA17 alloy cold-rolled sheet[J].Iron Steel Vanadium Titanium,2013(1):26-30. [14] 付应乾,董新龙.工业纯钛动态压缩特性及破坏的实验研究[J].稀有金属材料与工程,2016,45(1):102-106. FU Yingqian,DONG Xinlong.Experimental study on mechanical properties and failure characteristic of commercially pure titanium under dynamic compression[J].Rare Metal Materials and Engineering,2016,45(1):102-106. [15] 许峰,张喜燕,程佑铭.动态塑性变形纯钛的绝热剪切带研究[J].稀有金属材料与工程,2013,42(4):801-804. XU Feng,ZHANG Xiyan,CHENG Youming.Study on adiabatic shear band in pure titanium subjected to dynamic plastic deformation[J].Rare Metal Materials and Engineering,2013,42(4):801-804. [16] 刘英明,郭洪宇,关彬.连退机组炉内带钢褶皱缺陷控制[J].鞍钢技术,2017(4):51-54. LIU Yingming,GUO Hongyu,GUAN Bin.Control of wrinkles defect on surface of strip steel heated in furnace of continunous annealing mills[J].Angang Technology,2017(4):51-54. [17] 张楠.低碳钢头部褶皱缺陷分析与预防措施[J].金属世界,2021(4):46-48. ZHANG Nan.Analysis and preventive measurements of low carbon steel head wrinkle[J].Metal World,2021(4):46-48. [18] 刘昌明,刘斌,刘永前.热轧双相钢边部褶皱缺陷形成原因分析及改进[J].钢铁研究,2017,45(5):41-43. LIU Changming,LIU Bin,LIU Yongqian.Cause analysis of edge wrinkle forming of hot-rolled dual-phase steel and improving[J].Research on Iron and Steel,2017,45(5):41-43. [19] 彭进明,刘康康,柯鹏,等.椭圆孔型宽高比对线材表面变形状态的影响[J].物理测试,2021,39(3):13-17. PENG Jinming,LIU Kangkang,KE Peng,et al.Influence of oval pass width-height ratio on surface deformation of wire rod[J].Physics Examination and Testing,2021,39(3):13-17. [20] 张德松,杨霄,曹京华,等.方形轧件在椭圆孔的塑性失稳分析[J].物理测试,2020,38(1):31-35. ZHANG Desong,YANG Xiao,CAO Jinghua,et al.Plastic instability analysis of square rolled parts in elliptical holes[J].Physics Examination and Testing,2020,38(1): 31-35. [21] 张翥,王群骄,莫畏.钛的金属学和热处理[M].北京:冶金工业出版社,2014:16-41. [22] 赵永庆,洪权,葛鹏.钛及钛合金金相图谱[M].长沙:中南大学出版社,2011:10-15. [23] Tuomi T,Knuuttila L,Riikonen J,等.未掺杂VCz GaAs晶体的同步辐射X射线形貌[J].晶体生长学报,2002,237:350-355. Tuomi T,Knuuttila L,Riikonen J,et al.Synchrotron X-ray topography of undoped VCz GaAs crystals[J].Journal of Crystal Growth,2002,237:350-355. [24] 刘娜.工业纯钛板材冷轧和退火过程中的微观组织及织构演变[D].重庆:重庆大学,2017. [25] 马宏声.钛及难熔金属真空熔炼[M].长沙:中南大学出版社,2010:160-167.
