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Ni plating is the deposition of a Ni coating on a base metal from a nickel-based solution by means of chemical replacement, which shows excellent economy and simplicity [16]. In the present study... in Fig. 2(c). The formation of Al3Ni and Al3Ni2 phases can be described according to the following equations [20]: 3Al+Ni→Al3Ni+1083.6 kJ/mol  ......
不同气氛激光立体成形镍基高温合金Inconel 718的显微组织和力学性能刘奋成1,林鑫1,杨高林1,黄春平1,陈静1,黄卫东1(1.陕西省西安市西北工业大学凝固技术国家重点实验室)摘 要:在Ar气和空气环境中激光立体成形了Inconel 718镍基高温合金坯.显微组织观察,拉伸性能和高周疲劳性能测试结果表明...能均低于锻件标准,主要原因是试样中存在氧化物夹杂,显微气孔等冶金缺陷以及热处理后的晶粒尺寸较大.关键词:镍基高温合金; 激光立体成形; 气氛; 显微组织; 力学性能......
Effect of electropulsing treatment on corrosion behavior of nickel base corrosion-resistant alloy LIU Yang1, WANG Lei1, LIU Hong-yan1, ZHANG Bei-jiang2, ZHAO Guang-pu2 1. Key Lab for Anisotropy... October 2010; accepted 27 May 2011 Abstract: Electropulsing treatment (EPT) was performed on a nickel base corrosion resistant alloy during aging. The effect of EPT on the microstructure and corrosion......
nickel base alloy underhigh H2S and CO2 partial pressure CHEN Chang-feng1, FAN Cheng-wu2, ZHENG Shu-qi1, ZHANG Guo-an1, GE Lei1, CHEN Li-qiang1 (1. Department of Materials Science and Engineering... nickel base alloy under high H2S and CO2 partial pressure were investigated by X-ray photoelectron spectroscopy(XPS) as a function of depth. The effects of two type of corrosion environments......
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, both of them can strengthen the alloy. Key words: Ni-base superalloy; K4648; α-(Cr, Ni) phase; M23C6 carbide; microstructure  ...生α相和γ′-Ni3(Al, Ti ,Nb)相,且在晶界区补充析出粒状M23C6碳化物,起到强化合金的作用. 关键词:镍基高温合金;K4648;α-(Cr, Ni)相;M23C6碳化物;显微组织 中图分类号:TG 132.3; TG 113 文献标识码: A Microstructure of high Cr......
(320 ℃保温2 h)处理的QBe2薄片,其厚度为0.1 mm,化学成分如表1所列.预置中间层的目的主要是改变接头组织,以达到提升接头性能的效果[13].Cu和Ni无限固溶,且镍溶入铜合金基体可以起固态强化作用,是合适的中间层.考虑到焊接设备的容量,中间层材料选用0.05 mm厚的纯镍片. 焊接试样加工尺寸为25 mm×5 mm×0.1 mm,焊接中搭接量为5 mm,中间层及试样的安放如图1所示. 表...置镍中间层条件下的接头断口 图6所示为焊接电流为4.5 kA的预置镍层的接头断裂形貌,接头断裂方式为纽扣断裂,且镍中间层在纽扣凸起侧.从图6(a)可看出,断口表面平整,局部区域有撕裂角.图6(b)为R区域放大图,此区域为熔核边缘区域,图6(b)中可见,断裂面呈台阶状,无韧窝出现,部分金属附着在Ni中间层表面.图6(c)所示为结合面撕断区域放大图(S区域),可以看到断口形貌出现明显大量韧窝,呈韧性断......
状. 关键词:K417G合金;Ni(Co)CrAlYSi涂层;Ni3Al;摩擦;磨损;环境致脆 中图分类号:TH117,TG146 文献标志码:A 镍基高温合金广泛地应用于各类军用发动机以及热成型模具,增压涡轮,烟气轮机,玻璃工业,火力发电,石油化工和冶金工业等民用装备[1-2].由于镍基高温合金部件在磨损工况下的使用性能密切影响着装备的工作效率...于MCrAlY(M-Ni,Co或Ni+Co)涂层作为镍基高温合金的高温防护涂层和热障涂层黏结层,已广泛应用于燃气轮机的叶片及其他热端部件[13-15];且磁控溅射和电火花沉积的NiCrAlY涂层也应用于各类热作模具的高温抗氧化耐磨涂层[16-17].为了更全面地揭示镍基高温合金部件的微观组织与磨损裂纹之间的关系,本文作者也研究Ni(Co)CrAlYSi涂层的室温磨损特性. 1 实验......