渗碳

The layer structure and wear resistance of C B double cementation of 20 steel have been studied.

研究了20 钢的碳硼复合渗渗层组织及耐磨性能。

Two technology including nitrocarburizing process and salt nitrocarburzing process haver been adopted. Several conclusions were obtained: firstly, nitrided layers consist of two layers including the outer white layer, mainly ε and γ′ with favorite errosion resistance, the inner dark layer consist of α-Fe.

再往里为扩散层，扩散层与原始组织无明显区别，是过饱和含氮的α-Fe固溶体，比原始组织更易受腐蚀；(2)试样经长时间氮碳共渗后，渗层最表面会出现疏松，这是因为Fe原子向外扩散，在ε相内造成Fe原子空位，空位向内扩散，并可能在晶界上或某些晶体缺陷处堆积，以致造成空洞。

The heat treatment technology of carbo- nitriding of steel has the characteristic of lower treatment temperature and direct quenching.

钢的碳氮共渗热处理工艺具有共渗温度低、直接淬火等特点。

In this paper the sulpho nitro oxy carburizing and the hydrogen removing technology of round broach, the structure of diffusion layer and the relation between the depth, properties, the hydrogen content of diffusion layer and the service life of the broach are studied.

研究了连杆圆拉刀的氮碳硫氧共渗与去氢处理工艺，以及渗层组织结构、层深度、能、层含氮量与拉刀寿命的关系。

In this thesis we used two types of low-carbon ductile as the basal of low-carbon ductile cast—infiltration, one is as-cast high-toughness pearlitic low-carbon ductile, the other is as-...

用我们自己配制的合金粉末进行低碳球铁表面铸渗合金化后，得到的表面渗层的硬度最高可以达到HRC58，远远高于母体的硬度。

Cr12MoV steel,nitriding,composite ion sulfurization,friction and wear behavior

Cr12MoV钢离子渗氮和硫、碳、氮复合共渗层摩擦学性能研究。

The process involved the preparation of vanadium carbide which can be prepared from V 2O 3 by vacuum carbon reduction and then being nitrified to vanadium nitride by nitrogen gas.

以V2 O3为原料，采用真空还原方法制备出碳化钒，生成的碳化钒直接进行渗氮制备出碳氮化钒。

The worn surface of the sulfurized steel disc was observed with a scanning electron microscope, while the chemical states and phase structure of carbon-nitrided carbon steel and of the sulfurized one were examined by means of X-ray photoelectron spectroscopy and X-ray diffraction.

采用MPX-200型摩擦磨损试验机考察了碳氮共渗及室温电解硫化处理后的20#碳钢的摩擦学性能，探讨了在干摩擦条件下载荷、渗硫处理时间和滑动摩擦时间对渗硫层摩擦系数的影响。

The worn surface of the sulfurized steel disc was observed with a scanning electron microscope, while the chemical states and phase structure of carbon nitrided carbon steel and of the sulfurized one were examined by means of X ray photoelectron spectroscopy and X ray diffraction.

采用MPX-200型摩擦摩损试验机考察了碳氮共渗及室温电解硫化处理后20^#碳钢的摩擦学性能，探讨了在干摩擦条件下载荷、渗硫处理时间和滑动摩擦时间对渗硫层摩擦系数的影响。

The difficulty of leachate treatment is not only the organic pollutants of high concentration in the early leachate, but also the high ammonium concentration and low C/N ratio of the old leachates.

渗滤液处理的难点不仅是早期渗滤液含有高浓度的有机污染物，而更重要的是晚期渗滤液含有高浓度的氨氮及其相应的低碳／氮比的水质特点。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。