碳化层

La2O3-Mo阴极表面碳化层作用机制研究

Study on function mechanism of carbonized layer at the surface of la_2o_3-mo cathode

考虑到辐射在燃烧表面上形成的碳化层对辐射传递的阻碍作用，本文分析了10401041，N-5和N型推进剂的燃烧特性。

Considering the shielding effects of carbonous layer forming on the burning surface on the transmission of external irradiation , the burning characteristics of 1040 , 1041 , N - 5 and N propellants were analyzed .

铝件表面油质碳化层的去除工艺

Techniques of Removing Oily Carbonized Layer from the Surface of Aluminium Products

分别对无碳化层和有碳化层两种状态进行了分析和计算。

Analysis and calculation on a single substrate and substrate covered by a changing char layer was conducted respectively .

制动后，石棉摩擦材料表面形成富铜集铁和有机物的碳化层；

After braking , a carbonized organic matter layer with richer copper and iron forms on the worn surface of the asbestus .

当电缆遭到燃烧时，能够吸收大量的热量，并形成碳化层，隔绝气层、保护绝缘层免受燃烧，使火灾的损失不致于进一步扩大化。

When the cable was burning , a lot of heat can be absorbed , and form a carbon layer to isolate the gas and protect the insulation layer from burning , so that the loss will be cut .

数值模拟表明，该光热作用过程分为两个不同阶段：起初的非稳态阶段以及紧接着的准稳态阶段，此时相间边界温度、相间边界移动速度以及碳化层的厚度均为与时间无关的常数。

Numerical simulation shows that the laser-tissue thermal interaction model has two stages : the initial non-steady stage and the succeeding quasi-steady stage with the characteristic of constant parameters such as interface temperature , interface moving rate and carbonization zone etc.

研究表明，渗钒后，表面硬度达Hv（0.1）2820～3010，碳化钒层深度为7～9μm，耐磨性比常规热处理提高10倍以上。

The results Showed that after vanadizing the surface hardness reached Hv_ ( 0.1 ) 2820 ~ 3010 , the case depth reached 7 ~ 9 μ m. The wearability of vanadizing samples has increased by over ten times as compared with that of the conventional process .

TD处理的碳化钒覆层形成过程

Formation Process of Vanadium Carbide Coating through TD Treatment

溅射过程中，不同溅射靶间的相互污染、镀膜过程中的氧化和碳化及Pd层结晶性能的好坏等都对薄膜的性能有很大影响。

During the sputtering process , the contamination of the different target materials and the oxidation and carbonization and the crystal structure of Pd all have significant influence in the properties of rare earth films .

利用纯镍标识钢的原始表面，研究了钢经TD处理所产生的碳化钒覆层形成过程。

The original surface of a steel specimen was identified by pure nickel so as to study the formation process of a vanadium carbide coating on the surface of the steel specimen through TD treatment .

冷作模具钢的碳化钒覆层扩散处理

Vanadium Carbide Diffusion Coating for Cold-Worked Die Steels

钢铁表面碳化钒覆层的研究与应用

Study of the coating layer of vanadium carbide on iron and steel and Its Applications

结果表明沉积温度可以在600℃以下，每小时沉积1微米，碳化钛沉积层表面显微硬度可达3000kg/mm~2。

The results have proved that the deposited temperature may be under 600 ℃ . Its deposition rate is one micron per hour .

碳化钒覆层可大幅度提高钢的耐磨性和耐腐蚀性能，其磨损机理主要为疲劳剥落磨损。

Vanadium carbide coating can greatly increase wear resistance and corrosion resistance . Its wear mechanism was the abrasive due to fatigue peeling . 5 .

在钢齿牙轮钻头强化材料中，详细地分析了铸造碳化钨堆焊层产生龟裂、脱落和断齿的原因。

Detailed analysis is made of the reasons why fissures , peeling-off , and tooth breaking exist in the build-up welding layer of cast WC for hardening material of steel-toothed gear drills .

通过该工艺得到的碳化钒渗层具有高硬度、高耐磨性、高疲劳强度等优点，应用于拉伸模、挤压模等冷变形模具上，可大幅度提高模具的寿命。

The V permeating layer obtained form the process is of high rigidity , high wear resistance and high fatigue strength . It can be applied in cold forming dies such as draw and extrusion to improve the die life span .

合适的碳化钨硬质合金层厚度范围应在0.5~1.5mm之间，最佳的厚度应该是1mm左右。

The appropriate thickness of WC cemented carbide layer is between 0.5 ~ 1.5 mm , and the optimal thickness is about 1 mm .

火焰熔覆镍基/铸造碳化钨熔覆层在犁铧上的应用

Experimental Investigation on Plowshare Coated by Flame Cladding Ni-base Cast WC

碳化钨喷焊层耐磨性的研究

The research of wearability of WC spray welding coating

钛合金表面焊接碳化钨硬质合金层厚度的有限元模拟设计

FEM Simulation of Thickness of WC Cemented Carbide Alloy Layer Bonded on Titanium Alloy Surface

激光堆焊镍基碳化钨梯度焊层及耐磨机理分析

Gradient Hardfacing on the Laser Overlay Deposit Tungsten Carbide of the Nickel Matrix and Wearable Mechanism Analyze

作为一种整体结构件，在实际应用中碳化钨硬质合金层的厚度对部件的内应力分布以及尺寸稳定性有着重要的影响。

Being a kind of integrated structural parts , different thickness of WC cemented carbide layer has great effect on distribution of internal stress and dimensional stability .

从混凝土碳化深度、保护层厚度和钢筋锈蚀三方面调查研究了重庆地区混凝土结构耐久性的现状。

The durability status of concrete structures in Chongqing is discussed based on the analysis of the depth of concrete carbonization and the thickness of concrete cover and reinforcement corrosion .

论文采用理论分析、有限元模拟、试验研究及工程实测相结合的方法，围绕混凝土碳化、混凝土保护层锈胀开裂、构件承载力退化模型以及耐久性评估方法进行了系统的研究。

Based on theoretical analysis , finite element simulation and experimental study , the concrete carbonation and concrete cover cracking for steel bar corrosion , deteriorating models of reinforced concrete member and the method of durability evaluation are studied in the paper .

测试了不同粒度碳化钨和基体材料的铸渗层的耐滑动磨损性能、抗磨料磨损性能和抗冲蚀性能，分析了不同磨损条件下铸渗碳化钨复合层的耐磨机理和失效方式。

In this paper the sliding wear resistance , abrasive wear resistance and erosion resistance of Tungsten Carbide particulate compositing layers by cast in place hardfacing were tested .

采用高能离子注渗技术向钢铁零部件表层注渗碳化钨（WC），碳化钨含量高的富集层厚度0.35mm，碳化钨注渗层总厚度1.2mm。

WC was implanted into the surface of steel and iron parts by high-energy ion implanting technique . The implanted coating showed a total thickness of 1.2 mm , while the layer rich of WC had a thickness of 0.35 mm .

探讨了碳化MoLa2O3热阴极的寿命机理，分析了阴极工作温度和碳化度（碳化层厚度）对碳化MoLa2O3阴极电子管寿命的影响。

The lifetime mechanism of Mo-La_2O_3 cathode was discussed , and the effect of the operating temperature of cathode and the carbonized ratio ( thickness of carbonized layer ) on lifetime of tubes equipped with carbonized Mo-La_2O_3 cathode was analyzed respectively .