高温合金GH3039功能

束流偏移量对IC10/GH3039电子束焊接头成型及功能的影响
对航空发动机全体叶盘所选用的GH3039高温合金和IC10镍基单晶高温合金进行了电子束对接试验,IC10单晶高温合金与GH3039高温合金母材成分上的差异以及两侧熔化量不同,导致焊缝中各元素比例变化,使得接头力学功能呈现差异。因而,经过电子束偏束流焊接来操控焊缝区各母材熔化量,来改进接头的力学功能。剖析了光束偏移对接头力学功能的影响及典型接头横截面的安排特征,归纳剖析了光束偏移对焊缝微观硬度影响。结果表明,焊缝横截面未见裂纹、气孔等缺陷,焊缝上下宽度相当,最宽处达到1.8 mm左右,中心熔宽在0.8 mm左右,呈典型的"I"形,并以电子束作用中心为基准对称散布,焊缝安排主要由两侧的枝状晶及中心的等轴晶组成;接头的显微硬度从GH3039侧经焊缝到IC10侧呈逐渐递增趋势,W和Co元素的固溶强化、γ’强化相的含量的增加、晶粒粗化是显微硬度上升的原因,其中最高硬度能够达到HV 450。

The influence of beam offset on the formation and performance of IC10/GH3039 electron beam welding joints
Electron beam docking experiments were conducted on the GH3039 high-temperature alloy and IC10 nickel based single crystal high-temperature alloy used in the overall blade disk of aircraft engines. The differences in the composition of the base material between IC10 single crystal high-temperature alloy and GH3039 high-temperature alloy, as well as the different melting amounts on both sides, led to a change in the proportion of various elements in the weld seam, resulting in differences in the mechanical properties of the joint. Therefore, by using electron beam bias welding to control the melting rate of each base material in the weld zone, the mechanical properties of the joint can be improved. Analyzed the influence of beam deviation on the mechanical properties of joints and the microstructure characteristics of typical joint cross-sections, and comprehensively analyzed the influence of beam deviation on the microhardness of welds. The results showed that there were no cracks, pores or other defects on the cross-section of the weld seam. The width of the weld seam was equivalent, with the widest point reaching about 1.8 mm and the central fusion width being about 0.8 mm, forming a typical "I" shape. The weld seam structure was mainly composed of dendritic crystals on both sides and equiaxed crystals in the center, symmetrically distributed based on the center of electron beam action; The microhardness of the joint gradually increases from GH3039 side through the weld to IC10 side, and the solid solution strengthening of W and Co elements γ’ The increase in the content of strengthening phase and grain coarsening are the reasons for the increase in microhardness, with the highest hardness reaching HV 450.
高温合金GH3039外表ZrO2-CeO2/Al2O3复合陶瓷涂层抗热震功能
基于溶胶-凝胶技术制备Al2O3溶胶及ZrO2和CeO2陶瓷粉末,将ZrO2和CeO2陶瓷粉末掺杂在Al2O3溶胶中构成复合浆料并在高温合金GH3039外表别离制备Al2O3、ZrO2/Al2O3和ZrO2-CeO2/Al2O3复合陶瓷涂层,经过XRD、SEM、EDS、DSC等检测手段研讨不同陶瓷粉末的参加对复合陶瓷涂层在900℃抗热震功能的影响。结果表明:未添加任何陶瓷粉末的纯Al2O3陶瓷涂层在烧结进程中会产生很多的宏观裂纹,涂层外表质量差且易脱落;在Al2O3溶胶中掺杂ZrO2陶瓷粉末后,ZrO...
Thermal shock resistance of ZrO2 CeO2/Al2O3 composite ceramic coating on the surface of high-temperature alloy GH3039
Al2O3 sol and ZrO2 and CeO2 ceramic powders were prepared based on the sol gel technology, ZrO2 and CeO2 ceramic powders were doped into Al2O3 sol to form composite slurry, and Al2O3, ZrO2/Al2O3 and ZrO2-CeO2/Al2O3 composite ceramic coatings were prepared on the surface of superalloy GH3039, respectively. The effect of different ceramic powders on the thermal shock resistance of composite ceramic coatings at 900 ℃ was studied by XRD, SEM, EDS, DSC and other detection methods. The results show that pure Al2O3 ceramic coatings without any added ceramic powder will generate a large number of macroscopic cracks during the sintering process, resulting in poor surface quality and easy peeling off of the coating; After doping ZrO2 ceramic powder in Al2O3 sol, ZrO
溶胶凝胶法制备GH3039合金外表YSZ-Al2O3复合涂层的高温抗氧化功能

选用溶胶凝胶法,在GH3039合金外表制备了接连、致密的YSZ-Al2O3(YSZ为8wt%Y2O3部分安稳的ZrO2)复合涂层。以GH3039基体和Al2O3涂层作为比照,经过1000℃、100 h的等温氧化试验和循环氧化试验研讨了YSZ-Al2O3复合涂层对GH3039合金基体高温氧化行为的影响。使用扫描电镜(SEM)、X射线衍射(XRD)、能谱仪(EDS)剖析涂层氧化产品的外表描摹、安排结构及相组成。结果表明,YSZ-Al2O3复合涂层具有杰出的高温抗氧化功能和抗脱落功能,1000℃等温氧化仅增重0.5 mg·cm-2,1000℃循环氧化没有呈现明显的脱落;YSZ-Al2O3复合涂层氧化产品外表仅呈现少量Cr2O3;过渡涂层YSZ有效...
High temperature oxidation resistance of YSZ-Al2O3 composite coating on GH3039 alloy prepared by sol-gel method
Continuous and dense YSZ-Al2O3 (partially stabilized ZrO2 with YSZ of 8wt% Y2O3) composite coating was prepared on the surface of GH3039 alloy by sol-gel method. The influence of YSZ-Al2O3 composite coating on the high-temperature oxidation behavior of GH3039 alloy substrate was studied through isothermal oxidation experiments and cyclic oxidation experiments at 1000 ℃ and 100 h, using GH3039 substrate and Al2O3 coating as a comparison. Use scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy dispersive spectroscopy (EDS) to analyze the surface morphology, microstructure, and phase composition of coating oxidation products. The results indicate that the YSZ-Al2O3 composite coating has good high-temperature performance