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- The result shows that the porosity of nitrided layer is due to the over concentration of CNO- in the salt bath. 试验结果表明,渗层疏松主要是由于盐浴内CNO-浓度过高所致;
- This paper deals with the kinetics of the ion nitrided layer growth for armco iron, steels 45, 40Cr, 42CrMo and 38CrMoAl. 本文研究了在不同离子渗氮工艺参数下,纯铁、45钢、40Cr、42CrMo及38CrMoAl钢等五种材料的离子渗氮层长大动力学,建立了长大动力学的数学模式。
- Recent progress is presented regarding the research of structure, process, property, failure and strengthening mechanism of the composite "nitrided layer PVD coating". 摘要介绍了“渗氮/物理气相沉积(PVD)”复合涂层在涂层结构设计、工艺与性能、失效与强化机制等方面研究的最新进展。
- It is proposed that cooling ways greatly influence the hardness of nitrided layer,and the content of CNO - within the range of fluctuation has little effect. 发现盐浴渗氮层的硬度受冷却方式的影响很大 ,而CNO-浓度在一定范围变化则影响很小 ,钒的渗入有利于改善渗层硬度。
- The hardness gradient, depth , microstructure and phases of nitrided layers were measured with Microhardness Apparatus, Microcopy and X-ray diffractometer . 利用显微硬度计、金相显微镜和X射线衍射仪测定了渗氮层的硬度梯度、层深、显微组织和相组成。
- The invention relates to a manufacturing method of a titanium nitride layer as well as an apparatus thereof. 本发明涉及一种氮化钛层的制造方法及其装置。
- Model HRM-45 serves to determine the superficial Rockwell hardness of hardnetals, carburized, nitrided layers, and other chemical freating layers, it is also used to for hardness thin of thiner pieces. HRM-45型表面洛氏硬度计适用于硬氏合金、渗碳、氮化层和其他化学处理层及薄形零件的硬度测定。
- It serves to measure the hardness of ferrous, non-ferrous metals, hardmetals, carburized or nitrided layers, and other chemical treating layers.It is also used to for the hardness test of thin pieces. 45型光学表面洛氏维氏硬度计适用于黑色金属、有色金属、硬质合金、渗碳、氮化层和其他化学处理层及薄形零件的硬度测定。
- It serves to measure the hardness of ferrous, non-ferrous metals, hardmetals, Carburized or nitrided layers,other chemical treating layers.It is also used to for the hardness test of thin pieces. 该硬度计适用于黑色金属、有色金属、硬质合金,渗碳氮化层和化学处理层,薄形零件的表面洛氏硬度测试。
- The fracture failure would occur in nodular iron crankshafts due to the over-shallow and non-uniform thickness of nitriding layer. 球铁曲轴常常由于渗氮层薄、质量不稳定而引起断裂失效,本课题研究了球铁曲轴加氧渗氮工艺。
- Reducing discharge interval and increasing electric field intensity could increase the hardness and depth of nitriding layer markedly. 在本工艺条件下,适当减小放电间隙,增大电场强度,可以明显提高渗层的硬度和深度。
- Study on Contact Fatigue Capability of Ion Nitrided Layer 离子渗氮层的接触疲劳性能试验与研究
- The results of experiments showed that the Nb can raise the depth of diffusion zone,hardness,wear resistance,strength and toughness of the nitriding layer of the matrix steel. 实验结果表明,铌能增加扩散层深度、硬度及耐磨性,提高渗层的强韧性。
- This layer of rock contains a lot of flint. 这一岩层中有大量燧石。
- The inner layer of the wall of a spore. 孢子内壁孢子壁的内层
- Keywords ionitriding;nitrocarburizing;nitrided layer;fatigue property; 离子渗氮;氮碳共渗(软氮化);渗氮层;疲劳性能;
- There is a fine layer of dust on the desk. 桌子上有一层薄薄的尘土。
- The nitride layer was formed on the surface of ductile cast iron by gas multi-element penetration, and the phase structure and section appearance of nitride layer were analyzed by the XRD and SEM. 球墨铸铁经过气体多元共渗后可在其表面形成氮化层,通过X射线衍射和扫描电镜对渗层的相结构与形貌进行分析。
- This paper has investigated the influence of alloying element Nb on structure and properties of the soft nitriding layer by means of experiments of the matrix steels containing Nb and Nbfree. 通过含铌与不含铌基体钢气体软氮化工艺对比实验,初步探索了合金元素铌对基体钢软氮化渗层组织与性能的影响。
- The middle, usually fleshy layer of a fruit wall. 中果皮果皮中间通常含肉较多的那一层