高温热处理对电沉积镍微观组织和力学性能的影响  

Effect of high temperature heat treatment on microstructure and mechanical properties of electrodeposited nickel

作　　者：张涵[1] 高月月 乔及森[1] 夏天东[1] Zhang Han;Gao Yueyue;Qiao Jisen;Xia Tiandong(State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal,Lanzhou University of Technology,Lanzhou Gansu 730050,China;Baiyin Novel Materials Research Institute,Lanzhou University of Technology,Baiyin Gansu 730900,China)

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [2]兰州理工大学白银新材料研究院,甘肃白银730900

出　　处：《金属热处理》2023年第10期109-115,共7页Heat Treatment of Metals

基　　金：甘肃省科技计划项目重点研发计划(21YF5GD186);兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室开放基金(SKLAB02019012)。

摘　　要：为了提高电沉积镍后续塑性变形能力,利用X射线衍射仪(XRD)、光学显微镜(OM)、电子背散射衍射(EBSD)、显微硬度仪、电子万能材料试验机等手段,研究高温热处理对电沉积镍微观组织和力学性能的影响。结果表明,经热处理后,电沉积镍(111)面的衍射峰强度几乎是最强的;始极片晶粒优先长大,逐渐跨界面生长,沉积层晶粒也逐渐长大,微观组织趋于均匀化。经高温热处理后其显微硬度明显下降,从185 HV0.2降低至79.1 HV0.2,最高降低了57%;其中1100℃×8 h热处理后电沉积镍始极片与沉积层间界面消失,整体组织均匀性最佳,平均抗拉强度降低了31.13%,平均伸长率提高了128.46%,为最优的高温热处理工艺。In order to improve its subsequent plastic deformation capacity,the effect of high temperature treatment on the microstructure and mechanical properties of electrodeposited nickel was studied by means of X-ray diffractometer(XRD),optical microscope(OM),electron backscatter diffraction(EBSD),microhardness tester and electronic universal material testing machine.The results show that the diffraction peak intensity of electrodeposited nickel(111)surface is almost the strongest after heat treatment.The starting sheet grains grow preferentially and gradually grow across the interfaces.At the same time,the electrodeposited layer grains also grow gradually and the microstructure tends to be homogenized.After high temperature heat treatment,the microhardness is decreased significantly from 185 HV0.2 to 79.1 HV0.2,with a maximum reduction of 57%.After heat treatment at 1100℃for 8 h,the interface between the electrodeposited nickel starting sheet and the electrodeposited layer disappears,the overall microstructure uniformity is the best,the average tensile strength is decreased by 31.13%,while the average elongation is increased by 128.46%,showing that the high temperature heat treatment at 1100℃for 8 h is the optimal process.

关 键 词：电沉积镍 高温热处理 始极片 微观组织 力学性能 

分 类 号：TG146.15[一般工业技术—材料科学与工程]