2205双相不锈钢不同厚度层的r值与铁素体织构间的关系  

Relationship between r value and ferritic texture of 2205 duplex stainless steel sheet in various layers

作　　者：陈雨来[1] 荀晓晨[1] 李静媛[2] 

机构地区：[1]北京科技大学冶金工程研究院,北京100083 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《哈尔滨工业大学学报》2016年第11期135-141,共7页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金(51174026);十二五国家科技支撑计划(2015AA03A502)

摘　　要：研究了热轧、冷轧及退火状态下,2205双相不锈钢板各厚度层中铁素体相的织构演变规律,以及其对退火板塑性应变比r值的影响.结果表明,热轧板的表层板表现出明显的{001}<110>织构,而中间层板由于晶粒转动相对滞后,织构强点集中在(118)[16-24 1]和(001)[-1-20]取向.这种热轧织构的差异造成冷轧、退火之后,各厚度层的织构和平均塑性应变比rm不相同.冷轧板经1 100℃,90 s退火,各厚度层的铁素体相均未形成γ纤维再结晶织构,而形成了(112)[1-10]织构和处于(110)[1-18]^(554)[-2-25]取向间的织构,这与Σ9、Σ3和Σ17b重位点阵有着密切的关系,分别是(001)[1-10](001)[-1-10]和(110)[1-10]冷轧织构的再结晶产物.这类织构使得与轧向成0°的r值明显低于45°及90°的.另外,由于中间层板退火后残留的{001}<110>取向较少,因此中间层板的rm高于表层板.The evolution of ferritic texture in various layer of 2205 duplex stainless steel sheet are researched after hot rolled,cold rolled and annealed,and the effects of the textures on plastic strain ratio of the annealed sheet were studied. The results show that the strong { 001} 110 texture near surface while concentrated（ 118） [16-24 1]and（ 001） [-1-20] orientation in the center of the hot rolled sheet caused different textures appeared in the surface and center after subsequent cold rolling and annealing processing. It leads to different the average plastic strain ratio in between the surface and center sheet. After annealed at 1100 ℃ for 90 s,（ 112） [1-10]and（ 110）[1-18]-（ 554） [-2-25]recrystallization textures formed from（ 001） [1-10],（ 001） [-1-10]and（ 110） [1-10] cold rolled textures respectively,which is in accordance with Σ9,Σ3 and Σ17b coincidence site lattice relationship. Such annealed textures made that r0 value was significantly lower than r45 and r90value. Moreover,extremely few { 001} 110 orientation was remained in center sheet after annealed,which resulted in a higher average plastic strain ratio in the center sheet.

关 键 词：2205双相不锈钢 塑形应变比 织构 重位点阵 

分 类 号：TG142.7[一般工业技术—材料科学与工程]