采用应力松弛法研究了600-1100℃温度、30％-50％变形量条件下,Ti添加量为0.15％的高Ti钢中Ti的应变诱导析出规律.结果表明,Ti在600-1100℃温度范围内有明显的应变诱导析出过程.这种过程不只存在于单相奥氏体区,也存在于铁素体、奥氏体两相区以及单相铁素体区.温度越低,析出相的尺寸越小.在1000℃以上析出相的尺寸较大,而在900℃以下析出相的尺寸在几纳米至几十纳米.当温度降低到700℃以下时,析出相的尺寸约为3nm.在800-1100℃温度范围内析出的开始时间约为2s,但开始只是少数部位的少量析出.析出是一个持续的过程,样品不同部位的析出开始时间略有不同,10s以后TiC大量均匀析出.析出结束的时间在300-700 s范围内.析出时间与温度(PTT)曲线不符合“C”型特征.在30％、40％、50％三种变形量情况下,40％变形量的变形抗力与30％的相当,回复速度相当,析出开始时间相同,但是TiC的析出速度比30％时快,弛豫后残余应力最大,析出强化效果最明显.继续增加变形量到50％时变形抗力明显增大,回复速度也随之增大,但是析出开始时间由2s推迟到2.7s.弛豫后残余应力反而降低.
参考文献
| [1] | FANG Shufang,ZHANG Jian.Strain induced precipitation of (Ti,V)CN in high carbon steels,Acta Metall.Sin.,26(3),A228 (1990)(方淑芳,张健,(Ti,V)CN在高碳钢中的应变诱导析出,金属学报,26(3),A228(1990)) |
| [2] | S.G.Hong,K.B.Kang,C.G.Park,Strain induced precipitation of NbC in Nb-Ti microalloyed HSLA steel,Scripta Mater.,46,163(2002) |
| [3] | YUAN Shaoqiang,LIU Bingxin,ZHANG Fengrnei,Strain-induced precipitation in Nb and Nb-Ti microalloyed steel,J.Tangshan College 18(4),104(2005)(苑少强,刘炳新,张风梅,Nb钢及Nb-Ti钢的应变诱导析出行为,唐山学院学报,18(4),104(2005)) |
| [4] | G.F.Zhou,M.B.Wen,X.M.Wang,X.L.He,Effect of copper and boron content on strain-induced Nb(C,N) precipitation in ULCB steels at hot deformation temperature,Acta Metall.Sin.,(English Lett.),13,623 (2000) |
| [5] | WANG Shaodong,QU Jinbo,LIU Xianghua,WANG Guodong,Investigation of strain-induced precipitation on behavior in a microalloying steel by stress relaxation method,Acta Metall.Sin.,36(6),618 (2000)(王昭东,曲锦波,刘相华,王国栋,松弛法研究微合金钢碳氮化物的应变诱导析出行为,金属学报,36(6),618 (2000) |
| [6] | LI Zhi,WANG Yu,GUO Lihuan,WANG Guodong,LIU Xianghua,Strain induced precipitation of microalloy carbonitride in microalloyed bainitic engineering steel,Shanghai Metals,24(2),24(2002)(李智,王宇,郭丽环,王国栋,刘相华,贝氏体型非调制钢微合金碳氮化物的应变诱导析出,上海金属,24(2),24(2002)) |
| [7] | YUAN Shaoqiang,YANG Shanwu,WU Huibin,WANG Xuemin,HE Xinlai,Strain-induced precipitation in a multi-microalloyed steel,J.Univ.Sci.Technol.Beijing,25(5),414(2003)(苑少强,杨善武,武会宾,王学敏,贺信莱,多元微合金钢中的应变诱导复合析出,北京科技大学学报,25(5),414(2003)) |
| [8] | CAI Ning,JU Xinhua,XING Yang,Study on Ti Micro-alloyed 700MPa high strength Automobile-beam steels,Steel Rolling,30(5),5(2013)(蔡宁,鞠新华,邢阳等,Ti微合金化700 MPa级汽车大梁钢的研究,轧钢,30(5),5(2013)) |
| [9] | Z.H.Zhang,Y N.Liu,X.K.Liang,Y.She,The effect of Nb on recrystallization behavior of a Nb micro-alloyed steel,Mater.Sci.Eng.,A474,254 (2008) |
| [10] | Y.B.Cao,F.R.Xiao,G.Y.Qiao,C.J.Huang,X.B.Zhang,Z.X.Wu,B.Liao,Strain-induced precipitation and softening behaviors of high Nb microalloyed steels,Mater.Sci.Eng.,A552,502 (2012) |
| [11] | Z.Q.Wang,X.J.Sun,Z.G.Yang,Q.L.Yong,C.Zhang,Z.D.Li,Y.Q.Weng,Carbide precipitation in austenite of a Ti-Mo-containing low-carbon steel during stress relaxation,Mater.Sci.Eng.,A573,84(2013) |
| [12] | A.Pandit,A.Murugaiyan,A.Saha Podder,A.Haldar,D.Bhattacharjee,S.Chandra,R.K.Ray,Strain induced precipitation of complex carbonitrides in Nb-V and Ti-V microalloyed steels,Scripta Mater,53,1309 (2005) |
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