去应力退火对B10铜镍合金厚壁三通表面残余应力及组织性能的影响  

Influence of stress relieving annealing on surface residual stress,microstructure and properties of B10 colomony equal diameter tee

作　　者：王军亮 周铁柱 付利国 郁炎 李春辉 Wang Junliang;Zhou Tiezhu;Fu Liguo;Yu Yan;Li Chunhui(Luoyang Ship Material Research Institute,Luoyang Henan 471000,China)

机构地区：[1]中国船舶集团有限公司第七二五研究所,河南洛阳471000

出　　处：《金属热处理》2023年第7期111-116,共6页Heat Treatment of Metals

基　　金：国家重点研发计划(2021YFB3700700)。

摘　　要：在不同退火温度和保温时间下对冷推制成形B10铜镍合金厚壁三通管件进行真空去应力退火处理,研究B10铜镍合金厚壁三通管件去应力退火前后力学性能及残余应力的变化规律。结果表明,冷成形后等径三通主管、支管表面残余应力为压应力,主管与支管过渡位置表面残余应力为拉应力;去应力退火在不损害力学性能的前提下对B10铜镍合金等径三通表面残余应力消除明显。在本试验范围内,经300℃退火1 h随炉冷却,管件轴向和切向的残余应力基本消除。Vacuum stress relieving annealing of the B10 colomony equal diameter tee formed by internal high pressure was implemented at different temperatures and holding time.The evolution of mechanical properties and residual stress of the B10 colomony equal diameter tee during stress removal annealing was researched.The results show that the surface residual stress of the main pipe and branch pipe of equal diameter tee is compressive stress,and the surface residual stress of the transition position between the main pipe and branch pipe of equal diameter tee is tensile stress.On the premise of not damaging mechanical properties,stress removal annealing can obviously eliminate the surface residual stress of the B10 colomony equal diameter tee.In the range of orthogonal,axial and shear residual stresses of pipe fitting are basically eliminated after annealing at 300 ℃ for 1 h and cooling with the furnace.

关 键 词：B10铜镍合金厚壁三通 去应力退火 表面残余应力 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]