Study on Annealing Process of Large Size Copper Nickel Alloy Tube
-
摘要: 选用6个典型规格的铜镍合金无缝管材经拉拔生产后,按拟定的退火试验方案进行退火试验,退火后取样进行性能测试。通过检测拉伸强度、屈服强度和伸长率,以及布什硬度和洛氏硬度,并进行金相试验,观察合金是否由加工态组织变为单相再结晶α组织。结果表明:小于等于700℃的退火温度无法保证获得完全再结晶的单相α组织。退火温度大于730℃只会让晶粒持续长大;退火保温时间小于等于30 min无法实现全部再结晶,大于40 min,只会让晶粒持续长大。(720±10)℃保温40 min是比较适宜的铜镍合金无缝管材退火工艺制度。Abstract: The annealing process of copper nickel alloy seamless pipe was studied. Six typical copper nickel alloy seamless tubes were selected and produced by drawing. The annealing test was carried out according to the proposed annealing test scheme. After annealing, samples were taken for performance test. By testing tensile strength, yield strength and elongation, as well as Bush hardness and Rockwell hardness, and carrying out metallographic test, that whether the microstructure change from processed state to single-phase recrystallized α structure was observed. When the annealing temperature was less than or equal to 700 ℃, it was impossible to obtain single-phase α structure with complete recrystallization. When the annealing temperature was higher than 730 ℃, the grains would grow continuously. Annealing holding time less than or equal to 30 minutes could not achieve all recrystallization, and more than 40 minutes could make the grain continue to grow. The optimal annealing process for seamless copper nickel alloy pipe was holding at(720±10) ℃ for 40 minutes.
-
Key words:
- copper nickel alloy /
- seamless pipe /
- annealing /
- process
-
[1] 邓楚平,黄伯云,潘志勇,等.退火工艺对冷凝器用白铜管组织和性能的影响[J].金属热处理,2006,31(11):57-60. [2] 田荣璋,王祝堂,主编.铜合金及其加工手册[M].长沙:中南大学出版社,2002:60-69. [3] 陈琴,刘广龙,张娟,等.大口径φ219 mm×4.5 mm BFel0-1-1白铜管生产工艺研究[J].锻压技术,2013,38(2):69-73. [4] 茹祥坤,刘廷光,夏爽,等.形变及热处理对白铜 B10 合金晶界特征分布的影响[J].中国有色金属学报,2013,23(8):24-27. [5] 钟卫佳,等编.铜加工实用技术手册[M].北京:冶金工业出版社,2007:234. [6] 狄大江.舰船用铜及铜合金管[J].有色金属加工,2011,40(1):33. [7] 陈琴,刘龙光,李娟,等.大口径自铜管产品开发及工艺研究[J].上海有色金属,2013,34(2):55-58. [8] 张迎晖.形变及热处理对白铜B10合金晶界特征分布的影响[C].第三届中国铜工业科学技术发展大会会刊,2017:24-27. [9] 姜庆伟,刘印,王尧,等.超细晶铜在退火与高温变形条件下微观结构的不稳定性研究[J].金属学报,2009,45(7):873-879. [10] 周蕾,史庆南,蔡晓兰,等.大变形退火超细晶铜中的晶界特征分布[J].材料热处理学报,38,2017(6):25-30. [11] 胡江桥.金属材料退火挛晶控制及应用[J].科技资讯,2013(3):4-6. -
点击查看大图
计量
- 文章访问数: 184
- HTML全文浏览量: 120
- PDF下载量: 11
- 被引次数: 0
下载:
