QBe2铍青铜合金固溶工艺与组织性能研究-中国材料进展

文章信息/Info

Title:: Study on Solid Solution Technology and Microstructure of QBe2 Beryllium Bronze Alloy

作者:: 岳丽娟1; 2; 王艳婷1; 赵红运1; 饶晓方2; 王泓3; （1. 宁夏中色新材料有限公司，宁夏石嘴山 753000） (2. 西北稀有金属材料研究院宁夏有限公司稀有金属特种材料国家重点实验室，宁夏石嘴山 753000) (3. 西北工业大学材料学院，陕西西安 710072）

Author(s):: YUE Lijuan1; 2; WANG Yanting1; ZHAO Hongyun1; RAO Xiaofang2; WANG Hong3; (1. CNMC Ningxia New Materials Co., Ltd., Shizuishan 753000, China) (2. State Key Laboratory of Special Rare Metal Materials, Northwest Rare Metal Materials Research Institute Ningxia Co., Ltd., Shizuishan 753000, China) (3. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China)

Keywords:: beryllium bronze; solution treatment; microstructure; plasticity; electrical property

摘要:: 为了研究固溶保温时间对QBe2铍青铜合金组织性能的影响规律，对QBe2铍青铜合金进行790 ℃固溶处理，保温时间为30~120 min，并在流动清水中快速冷却以使富铍相充分固溶于基体中，获得可以产生沉淀强化的过饱和固溶体，分析了不同固溶保温时间对合金力学性能、电性能及微观组织的影响。结果表明，当固溶保温时间为60 min时，第二相能完全溶解到基体中；当固溶保温时间为90 min时，合金的力学性能完全满足固溶态产品的要求；当固溶保温时间达到120 min时，合金的塑性最好。经不同保温时间固溶后的材料，其屈服强度与平均晶粒尺寸符合Hall-Petch关系。

Abstract:: In order to study the effect of solution holding time on the microstructure and properties of QBe2 beryllium bronze alloy, QBe2 beryllium bronze alloy was conducted by solution treatment under 790 ℃ for 30, 60, 90 and 120 min, then quenched with the flowing clean water in order to make the beryllium as rich phase fully dissolve in the matrix to obtain the supersaturated solid solution which can produce precipitation strengthening. The effects of different solution holding time on mechanical properties, electrical properties and microstructure of the alloy were also analyzed. The results show that the second phase can be completely dissolved into the matrix when the solution holding time is 60 min. When the solution holding time is 90 min, the mechanical properties of the alloy fully meet the requirements of the industrial products. When the solution holding time reaches 120 min, the plasticity of the alloy is the best. Besides, it also can be found that the yield strength and average grain size of the material after the different solution holding time are in accordance with the Hall-Petch relation.