ugg prezzo Seepage niobium layer and Properties of

Seepage niobium layer of the organization and performance

0C + Nb-Fe690664408i560514473724560503c + I5AI-Nb'0jl1328705I4l1】 68792707l246847803 phosphate carburizing steel should first be seepage niobium or niobium permeation of carbon to obtain a higher degree of touch. 2 seepage niobium layer typical organization is a white layer of the compound layer, the phase structure of the NbC-Nb; C and NbFe composition. 3. Recommended seepage niobium process for 1050 ~ × 4 ~ 6h, with penetration reminder caCl2, diffusion layer thickness of up to 0.03 ~ 0.05mm. Aluminum thermal seepage niobium niobium oxide content in the aluminum content of 15 - 20% is appropriate. Organizations and non-cyclical impact on the state under impact load crack growth of the Guizhou Institute of Metallurgy Zhihao Yu Jie Tu Department of Materials, Xi'an Jiaotong University, Zhou Hui Gu Jing Feng long article on Abstract # 10 copper plate actinides and 45CrNi Taiwan Jie state of several organizations were carried out impact Sheng Lo Sheng Lo Ha crack expansion of non-impact test lay morning. Sac sac sac out: 45CrNi pomfret group blog on the impact of cancer business-like pattern of capsule compared to non-impact fatigue too; l Steels state under the two load gluttonous _ Chou Chen-based car-free shaggy ring. Results sets of micro-mechanisms and discussed more Biao Dai Hete factor on the impact of feeding. Non-impact fatigue crack growth. Key words 1 the impact of fatigue, non-impact fatigue, crude soared to teach should be EffectsofMkrostractareORtheCrackPropagationunderImpactandNonimpactFatigueLoadYuJieJinZhil ~ oToMingjingZhouHiu [Abstract] Cractpropagationinimpactand11011 a impactfatiguetestw ~: r0stu ~ eduqlowcarbonst ~ e3.1and45CrNialloysteeIindifferentheat-treatmemconditions. BasedoRmicrofracturemech Ⅻ bmandloadcharac. theeffcctofmicrostructureo12thetractpropagationinimpactandI1OR-impactfatiguewasdiscassnd [Keywords | Impactfatigue, Non-impactfatigue, Microstru ~ ture I. INTRODUCTION f the past two years,[link widoczny dla zalogowanych], the impact of domestic and foreign scholars and non-impact fatigue crack growth under load compared to a lot of research work. Summarize some of the macro-laws call for the material, but the two organizations were shake crack under load Comparison of the effects reported less material for further study two loading systems in the deformation and fracture mechanisms of F, it is necessary organizational factors depth. This paper, and 10 ears of steel used 45CrNi the two materials into different organizations dealing with the state,[link widoczny dla zalogowanych], respectively, for impact and non-impact fatigue crack growth,[link widoczny dla zalogowanych], to explore the organizational state of the two loading crack growth under the influence. =, Test materials and methods of testing materials 45CrNi and 1O Velvet Table 1 the chemical composition of steel, its heat treatment process and the corresponding mechanical properties are shown in Table 2,[link widoczny dla zalogowanych],3 routine. Four-point bend specimen by the fatigue crack width of 18mm, specimen thickness of 6mm, (45CrND, 8ram (10). Specimens opened by the middle of a pull to the side drift 2ram, angle of 45.'s Unilateral notch, notch root have a radius of 025mm. shock and non-impact test were washed in the DC-150 testing machine and Inswon1341 servo testing machine. more punch test applications are subject to the impact of sample testing methods, see the literature [5L Third, the experimental results Figure 1 shows the impact of 45CrNi state organizations and non-impact fatigue crack growth rate under load and stress intensity factor amplitude A relationship between the curves.. Comparing Figure 1 (a) and (b), under the two load , 45CrNi different organizations in different states of the crack growth rate, but the crack propagation speed of the order is M, the fastest, M1 second, M2 in that order, M4 was the slowest. and the stress intensity factor increases with the increase in AK,[link widoczny dla zalogowanych], maintenance organizations construction rate of expansion is quite similar. From the figure also shows, the impact of weakness in the load, split between different organizations destroyed the difference between the growth rate the impact of cancer than non-\
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