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镍基合金喷熔层摩擦学行为与机制的研究 总被引:1,自引:0,他引:1
采用热喷熔工艺制备了两种镍基合金喷熔层,并选用高锰钢、不锈钢作为对比材料,研究了镍基合金喷熔层的摩擦磨损性能。研究结果表明:镍基合金喷熔层具有良好的耐磨损性能和较低的摩擦系数。镍含量对喷熔层的摩擦学性能有显著影响,高镍含量的镍基合金,其耐磨性能明显优于低镍含量的镍基合金。在低速轻载条件下,镍基合金喷熔层的磨损机理为微观犁削;高速重载时,表现为粘着磨损和磨料磨损,其中高镍含量的喷熔层表面形成了致密的转移膜,有效地降低了磨损率。 相似文献
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数字化技术在镍基合金钨元素可见光谱分析中的应用 总被引:2,自引:1,他引:1
使用可见光谱数字化分析系统对镍基合金中W元素可见光谱进行分析测定,研究镍基合金中W元素的W468.05nm、W484.38nm和W505.33nm分析谱线组的特征,探索镍基合金中W元素的数字化分析技术。结果可用于镍基合金中W元素的定性、定量分析和牌号鉴别。 相似文献
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研究了镍基合金中Ti元素的可见光谱数字化分析技术,对镍基合金中Ti元素的Ti498.17nm和Ti551.25nm分析谱线组进行了数字化处理.探索了使用可见光谱数字化分析系统对镍基合金中Ti元素可见光谱进行定量分析和牌号鉴别的方法.结果可用于镍基合金中Ti元素的定性、定量分析和合金牌号鉴别. 相似文献
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看谱镜在镍基合金成分分析中的应用 总被引:10,自引:2,他引:10
使用光栅看谱镜和棱镜看谱镜对镍基合金可见光谱进行看谱分析,摄制彩色图谱,研究基体元素镍和各成分元素的可见光谱特征。在镍基合金可见光谱计算机模拟基础上,研究利用镍元素及成分元素特征谱线进行基体鉴别和成分元素分析的方法。研究结果可用于镍基合金基体鉴别及各成分元素的定性和半定量分析。 相似文献
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高温材料镍基合金的切削试验研究 总被引:3,自引:0,他引:3
高温材料镍基合金是超耐热、超强度的合金钢,属于难加工材料,通过分析镍基合金的机械性能,经过具体的试验研究,对加工镍基合金中的PVD涂层和CVD涂层刀具进行了比对,通过正交试验对切削用量的选择进行了优化. 相似文献
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化学镀Ni—B合金与有机钼对金属基体的双重保护 总被引:1,自引:0,他引:1
采用表面镀层和润滑油中加入某些添加剂,使两者产生协同效应,是减少相对运动的零件表面间摩擦磨损的一项有效措施,本文研究了Ni-B合金镀层与油溶性有机钼的联系及摩擦磨损机理,摩擦磨损实验结果表明,Ni-B合金镀层与油溶性有机钼(MoDTP)有良好的协同效应,可大幅度提高运动副的减摩性和耐磨性,如Ni-P合金镀层经40℃热处理,油中加MoDTP比45钢基础油润滑下,耐磨性提高12.8倍,摩擦系数降低54 相似文献
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研究了二烷基二硫代磷酸钼(简称MoDTP)和二烷基二硫氨基甲酸钼(MoDTC)的摩擦学性能。结果表明,油中加MoDTP与不加添加剂相比,45钢耐磨性提高4.68倍,摩擦系数降低50.24%。且MoDTP的减摩性和耐磨性均优于MoDTC。还考察了Ni-P合金镀层的摩擦学性能,发现用基础油润滑时,Ni-P合金镀层的耐磨性比45钢提高6.2倍,但摩擦系数却高出20.35%。此外,MoDTP与Ni-P合金 相似文献
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Effect of heat treatment on the microstructure and properties of Ni based soft magnetic alloy 下载免费PDF全文
Chunhong Li Hui Ruan Dengming Chen Kejian Li Donglin Guo Bin Shao 《Microscopy research and technique》2018,81(7):796-802
A Ni‐based alloy was heat treated by changing the temperature and ambient atmosphere of the heat treatment. Morphology, crystal structure, and physical performance of the Ni‐based alloy were characterized via SEM, XRD, TEM, and PPMS. Results show that due to the heat treatment process, the grain growth of the Ni‐based alloy and the removal of impurities and defects are promoted. Both the orientation and stress caused by rolling are reduced. The permeability and saturation magnetization of the alloy are improved. The hysteresis loss and coercivity are decreased. Higher heat treatment temperature leads to increased improvement of permeability and saturation magnetization. Heat treatment in hydrogen is more conducive to the removal of impurities. At the same temperature, the magnetic performance of the heat‐treated alloy in hydrogen is better than that of an alloy with heat treatment in vacuum. The Ni‐based alloy shows an excellent magnetic performance on 1,373 K heat treatment in hydrogen atmosphere. In this process, the µm, Bs, Pu, and Hc of the obtained alloy are 427 mHm?1, 509 mT, 0.866 Jm?3, and 0.514 Am?1, respectively. At the same time, the resistivity of alloy decreases and its thermal conductivity increases in response to heat treatment. 相似文献
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Gyeong-Geun Lee Hyung-Ha Jin Kunok Chang Sangyeob Lim Min-Chul Kim Bong-Sang Lee Junhyun Kwon 《Journal of Mechanical Science and Technology》2017,31(8):3675-3678
Ni-Cr-Mo low alloy steels are being considered as alternative materials to replace the Mn-Mo-Ni low alloy steels used in reactor pressure vessels in nuclear power plants, because of their higher strength and toughness. However, the neutron irradiation occurring during reactor operation causes degradation of Ni-Cr-Mo low alloy steel. In this study, irradiation-induced clusters in a Ni-Cr-Mo model alloy irradiated in the High-flux advanced neutron application reactor (HANARO) research reactor were investigated via Atom probe tomography (APT). The irradiated specimens showed irradiation-induced hardening and embrittlement. The neutron irradiation caused Si clustering, and these spherical clusters were homogeneously distributed within the matrix. Ni was also clustered at the Si clusters. However, the other elements did not clearly exhibit clustering behavior. Si and Ni atoms were also located at the dislocations. To quantify the nano-sized clusters, a method based on the Density-based spatial clustering of applications with noise (DBSCAN) algorithm was implemented. The total number of clusters was calculated to be ~7 × 10-4 n/nm3 and the average cluster radius was less than 2 nm. The APT approach was demonstrated to be well suited for discovering the irradiation defect structures. 相似文献
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