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   nitriding depth 在 金属学及金属工艺 分类中 的翻译结果: 查询用时:0.058秒
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nitriding depth    
相关语句
  渗层深度
    The results showed that the value of nitriding depth measured by the hardness meter is basically the same as that by the EMA.
    结果表明:硬度法和探针法渗层深度测值基本一致;
短句来源
    Experimental results show that the Re elements have in-ceased nitriding depth over 25%, improved nitriding microstructure and enhanced hardness. The wear resistance has increased more than double times.
    结果表明,一定量的稀土元素对离子硫、氮、碳工艺具有较明显的催渗作用,使渗层深度提高25%以上,改善了表面组织,使表面硬度增强,耐磨性能提高2倍以上。
短句来源
  渗层深度
    The results showed that the value of nitriding depth measured by the hardness meter is basically the same as that by the EMA.
    结果表明:硬度法和探针法渗层深度测值基本一致;
短句来源
    Experimental results show that the Re elements have in-ceased nitriding depth over 25%, improved nitriding microstructure and enhanced hardness. The wear resistance has increased more than double times.
    结果表明,一定量的稀土元素对离子硫、氮、碳工艺具有较明显的催渗作用,使渗层深度提高25%以上,改善了表面组织,使表面硬度增强,耐磨性能提高2倍以上。
短句来源
  氮化层深度
    Application of a Method Measuring Nitriding Depth
    一种检测氮化层深度的方法在生产上的应用
短句来源
    The max weight% of N in treated sample is 34.44% and the effective nitriding depth of 11.21 μm is obtained by scanning electron microscopy(SEM) method.
    利用扫描电镜(SEM)测量氮化后样品得出氮的最大质量分数可达34.44%,有效氮化层深度可达11.21μm。
短句来源
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  nitriding depth
Our results indicate that a previous decarburization only slightly affects the surface hardness, but reduces the conventional nitriding depth.
      
An increase of the relative nitriding depth on steel A from 23 to 48.5% results in a doubling of the permeability.
      
A quantification procedure based on TEM images exploitation revealed that the size and the number of the fine precipitates vary inversely with nitriding depth.
      
Nitriding depth was found to be parabolic with ion nitriding time in all three steels at all ion-nitriding temperatures investigated, the nitriding reaction being faster in martensitic stainless steel than the others.
      
The main effects on the character and velocity of propagation of the combustion wave and on the nitriding depth of refractory metal briquettes are demonstrated.
      


The nitride cases of steels nitrided by different hardening processes were measured with an optical microscope, an electron microprobe analyze r (EMA) and a hardness meter respectively. The results showed that the value of nitriding depth measured by the hardness meter is basically the same as that by the EMA. The values of nitrided alloys (e.g., 38CrMoAl and 18CrNiW) obtained by optical microscopy and hardness metering are approximate to each other, but those of low a11oy steels and carbon steels (e.g.,...

The nitride cases of steels nitrided by different hardening processes were measured with an optical microscope, an electron microprobe analyze r (EMA) and a hardness meter respectively. The results showed that the value of nitriding depth measured by the hardness meter is basically the same as that by the EMA. The values of nitrided alloys (e.g., 38CrMoAl and 18CrNiW) obtained by optical microscopy and hardness metering are approximate to each other, but those of low a11oy steels and carbon steels (e.g., 40Cr and, 45~#) obtained by the same methods are entirely different. In this paper, on the basis of an analysis of the different results mentioned above and the essence of these three methods, their inspection efficiency, precision, repetitiveness aud reality are compared, and the authors suggest that the hardness grading would be recommended as so far the most satisfactory method to measure the hardening case, and its corresponding criteron of measurement be established as well.

本文采用金相法,硬度法和电子探针法分别对几种经过不同工艺处理的氮化钢进行渗层测定。结果表明:硬度法和探针法渗层深度测值基本一致;对于合金氮化钢(38CrMoAl、18CrNiW),金相法与硬度法,探针法测值相近,而对于低合金钢和碳素钢,(40Cr、45~#),金相法与硬度法,探针法相差甚远。最后,在分析三种测试方法的实质和结果不一致的缘由的基础上,全面比较了其检验效率,准确性,重复性和现实性,认为硬度法是目前应予以推荐的渗层测试方法,但需制订相应的标准。

The rolling contact fatigue strength and surface failures of nifriding 38 CrMoAlA steel were studied. The contact fatigue limit for 10 ~7 cycles was about 1080 MPa, when the nitriding depth was 0.3 mm and specific sliding was -20%. Cracks leading to spalling were initiated at surface defects and boundaries between nitriding layes and the core. Spalling was a major form of contact fatigue failures in nitriding steel. The depth of the spalling corresponded to the total nitriding depth....

The rolling contact fatigue strength and surface failures of nifriding 38 CrMoAlA steel were studied. The contact fatigue limit for 10 ~7 cycles was about 1080 MPa, when the nitriding depth was 0.3 mm and specific sliding was -20%. Cracks leading to spalling were initiated at surface defects and boundaries between nitriding layes and the core. Spalling was a major form of contact fatigue failures in nitriding steel. The depth of the spalling corresponded to the total nitriding depth. The cracks which had a chovron pattern were occurred at rolling surface before spalling. The conchoidal pattern and intergranular fracture appeared at the edges of spall, while the step and scale - like pattern appeared at bottom of spall.

研究了氮化钢38CrMoAlA的滚动接触疲劳强度及其表面破坏特征。当氮化层为0.3mm,滑差率为-20%时,试验周次为10~7的接触疲劳极限约为1080MPa。导致剥落的疲劳裂纹开始于表面缺陷和氮化层与心部交界处。氮化钢的主要接触疲劳破坏形式是剥落。剥落深度与氮化层总厚度大致相同。剥落前,表面产生人字型裂纹。剥落边缘的断口形态为贝纹状和沿晶断裂,剥落坑底部呈台阶状和鳞片状。

The effect of Re elements on ion sulpe-nitricabinzing microstructure nitriding depth andweer resistance was carried out. Experimental results show that the Re elements have in-ceased nitriding depth over 25%, improved nitriding microstructure and enhanced hardness.The wear resistance has increased more than double times.

本文研究了稀土元素对离子硫、氮、碳共渗层金相组织,渗层深度及耐磨性能的影响。结果表明,一定量的稀土元素对离子硫、氮、碳工艺具有较明显的催渗作用,使渗层深度提高25%以上,改善了表面组织,使表面硬度增强,耐磨性能提高2倍以上。

 
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