研究了在不同气氛下进行离子渗氮对TC 4钛合金渗氮层的组织与性能的影响。
The effect of the atmosphere on the structure and properties of ion nitriding layer of alloy TC4 was investigated.
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 hardness gradient, depth, microstructure and phases of nitrided layers were measured with Microhardness Apparatus, Microcopy and X-ray diffractometer.
碳氮共渗工艺选择不当，共渗层过深，表面出现壳状碳氮化合物、内氧化等缺陷组织是造成其断裂的主要原因。
The unsuitable carbonitriding process, internal oxidation, over deep depth of carbonitrided layer and crust like C N compound on the surface are the main reasons to cause fracture.
针对合金化渗氮的组织性能进行了研究。
氮碳共渗后快冷，在渗层获得含氮碳的马氏体组织。
Rapid cooling after nitrocarburizing, martensite structure is obtained at the diffusion layer.
对渗氮层的硬度、深度和组织结构等进行了分析研究。
The microstructure, microhardness and depth of the nitrided layers were studied.
研究氨气和氮气混合气氛的成分对渗氮速率的影响，测定了渗氮层的显微组织、渗氮层氮浓度分布及有关力学性能。
Effect of nitrogen and ammonia content on the nitriding rate, the microstructure, nitrogen concentration and hardness distribution of the nitriding case were studied.
而且稀土元素显著地细化渗层组织，促进氮碳化合物弥散细小析出，提高渗层硬度。
Moreover, re elements can fine the structure of the layer, improve precipitating carbonous chromium nitride formed and increase the hardness of the layer.
采用X射线衍射、扫描电镜及显微硬度等技术，综合比较和分析了H13模具钢在不同热处理状态下经相同气体渗氮处理后表层的组织结构和硬度。
The microstructure and hardness of the layer of H13 tool steel gas-nitrided in different heat treatment conditions were studied by X-ray, SEM and micro-hardness test.
对45碳钢氮碳共渗处理疲劳断裂后的断口附近的显微硬度，组织特征进行了分析。
The microhardness, microstructure characteristics of the nitrocarburized 45 carbon steel after fatigue fracture were studied.
对45碳钢氮碳共渗处理疲劳断裂后的断口附近的显微硬度，组织特征进行了分析。
The microhardness, microstructure characteristics of the nitrocarburized 45 carbon steel after fatigue fracture were studied.
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