冷轧变形量及退火温度对Ni₄₇Ti₄₄Nb₉板材织构和性能的影响

冯昭伟¹，米绪军²，王江波¹，袁志山¹，缪卫东¹，周 瑾¹

(1. 有研亿金新材料股份有限公司，北京 102200；
2. 北京有色金属研究总院 有色金属材料制备加工国家重点实验室，北京100088)

摘 要：使用X射线衍射技术研究冷轧变形量和退火温度对Ni₄₇Ti₄₄Nb₉合金一次冷轧和二次冷轧板织构和性能的影响。结果表明，在冷轧变形量小于35%时，一次冷轧板的织构主要为{111}á110?，与热轧态织构不同，随冷轧变形量的增加，织构取向密度略有提高；二次冷轧板主要织构为{111}á110?，在á110?//RD取向线上从{111}á110?延伸到{110}á110?，二次冷轧使织构取向密度获得较大提高。当二次冷轧板材在高于500℃退火时，其主要织构为{111}á112?再结晶织构，700 ℃、60 min炉冷样品织构的取向密度明显高于相同制度下水淬样品织构的取向密度。

关键词：Ni₄₇Ti₄₄Nb₉形状记忆合金；冷轧板材；退火温度；织构

Influence of cold rolling reduction and annealing temperature on texture and properties of Ni₄₇Ti₄₄Nb₉ plate

FENG Zhao-wei¹, MI Xu-jun², WANG Jiang-bo¹, YUAN Zhi-shan¹, MIAO Wei-dong¹, ZHOU Jin¹

(1. Grikin Advanced Materials Co., Ltd., Beijing 102200, China;
2. State Key Laboratory for Fabrication and Processing of Nonferrous Metals,
General Research Institute for Nonferrous Metals,)

Abstract:The effects of the cold rolling reduction and annealing temperature on the texture and properties of Ni₄₇Ti₄₄Nb₉ first and secondary cold-rolled plate were investigated by using XRD method. The results show that the major texture of the first cold-rolled plate is {111}á110? that is different from the hot-rolled texture and the orientation density increases slightly with increase of cold reduction when the cold reduction is less than 35%. The orientation density of the secondary cold-rolled plate is greatly enhanced and the major texture is {111}á110? and spreads from {111}á110? to {110}á110? in a á110?//RD fiber. When the annealing temperature of the secondary cold-rolled plate is above 500 ℃ the major texture is {111}á112? recrystallization texture. The orientation density is obviously higher in the secondary cold-rolled plate after furnace cooling at 700 ℃ for 60 min than that of water quenching texture.

Key words:Ni₄₇Ti₄₄Nb₉ shape memory alloy; cold-rolled plate; annealing temperature; texture