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nitriding
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  渗氮
     A Study on W6Mo5Cr4V2 Steel Controllable Nitriding
     W6Mo5Cr4V2钢可控渗氮的研究
短句来源
     The Study of Nitriding Technology for 30Cr1Mo1V Steel
     30Cr1 Mo1 V钢渗氮工艺初探
短句来源
     When V(N_2)∶V(H_2) in the nitriding atmosphere is 1∶9 or 1∶3,the nitrided layer has very high toughness.
     经V(N2)∶V(H2)为1∶9及1∶3气氛氮化,渗氮层韧性很高;
短句来源
     Study on Nitriding Behavior of 30Cr2MoV Steel
     30Cr2MoV钢渗氮行为研究
     Study on 4Cr14Ni14W2Mo Steel Plasma Nitriding Layer Peeling off
     4Cr14Ni14W2Mo钢离子渗氮层剥落的研究
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  氮化
     Synthesis of GaN nanotubes through nitriding ZnO/Ga_2O_3 film
     氮化ZnO/Ga_2O_3薄膜合成GaN纳米管
短句来源
     Laser Gas Nitriding of Ti6A14V Alloy
     Ti6A14V合金的激光气体氮化
短句来源
     Study on New Process for Nitriding 18Cr2Ni4WA Steel
     18Cr2Ni4WA钢氮化新工艺的研究
短句来源
     Fabrication of GaN films by nitriding ZnO/Ga_2O_3 films on silicon substrates
     氮化Si基ZnO/Ga_2O_3制备GaN薄膜
短句来源
     When V(N_2)∶V(H_2) in the nitriding atmosphere is 1∶9 or 1∶3,the nitrided layer has very high toughness.
     经V(N2)∶V(H2)为1∶9及1∶3气氛氮化,渗氮层韧性很高;
短句来源
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  “nitriding”译为未确定词的双语例句
     Study on The Nitriding of 34CrNi1Mo and 42CrMo Steels
     34CrNi1Mo、42CrMo钢氮化的研究
短句来源
     Synthesis of GaN Powder by Directly Nitriding Ga_2O_3
     Ga_2O_3氮化法合成GaN粉体的研究
短句来源
     Reformation of LD_3-200/1000 Type Glow Ion Nitriding Furnace
     LD_3-200/1000型辉光离子氮化炉的改造
短句来源
     Study on Macroscopi CStress n Ion Nitriding Case of 18Cr2Ni4WA Steel
     18Cr2Ni4WA钢离子氮化宏观应力的研究
短句来源
     A Study on the Nitriding of Low-Carbon Ferromanganese FeMn 84 C0.4
     低碳锰铁FeMn84C0.4氮化的实验研究
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  nitriding
Estimation of the Corrosion Resistance of ВНС-17 and ЭИ-69 Steels after Nitriding Them in a Magnetic Field
      
This results not only in quantitative differences in their characteristics but also in a qualitatively different change in the properties of these materials on nitriding.
      
A study was made of the growth regimes of undoped epitaxial GaN layers under various substrate nitriding conditions.
      
It was observed that at a nitriding temperature of ~1000 °C films are formed with typical growth characteristics in the form of hexagonal pyramids separated by a smoothed surface.
      
Nitriding of technical-purity titanium in hollow-cathode glow discharge
      
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Although nitriding provides us with an iron catalyst of good durability and resistance to carbon deposition,it brings at the same time a higher methane form- ation during synthesis,this has hindered its application in industry. Accordingly,factors effecting this main side-reaction were thoroughly studied. They are:reaction temperature and pressure,space velocity,particle size of catalyst, alkaline content in catalyst,method of reduction,degree of nitriding,and aging of catalyst.With the exception...

Although nitriding provides us with an iron catalyst of good durability and resistance to carbon deposition,it brings at the same time a higher methane form- ation during synthesis,this has hindered its application in industry. Accordingly,factors effecting this main side-reaction were thoroughly studied. They are:reaction temperature and pressure,space velocity,particle size of catalyst, alkaline content in catalyst,method of reduction,degree of nitriding,and aging of catalyst.With the exception of space velocity,all of these independent variables play quite important roles iu effecting the yield of methane.The relative impor- tance of these variables are discussed in detail.Among them,the alkaline content and operation pressure are the most influential.With the increase of the alkaline content from 0.8 to 1.7g K_2O/100g Fe (by impregnation),methane formation can be effectively depressed,for example,at 7 atm.and 15 atm.,CO converted to methane is reduced from 7-9% to 5-6% and from 5-7% to 3% respectively.Further- more,the tendency of increase in methane formation with time can also be checked by addition of alkaline. The product distribution has been correlated with methane formation by sum- marizing data reported in literatures and our own results.Presumably methane is essentially formed on some special locations on the catalyst.However,the operation conditions which favor the formation of light hydrocarbons always enhance the for- mation of methane at the same time,so that there appears some parallelism between them. The mechanism of methane formation and the reason for its steady increase in life tests are also discussed.

在已经解决了氮化熔铁催化剂的活性维持问题及原料气体合理利用的基础上,进一步研究了合成时的一个主要副反应——CH_4的生成——与各项操作变数的关系.确定了反应温度、压力、空间流速、催化剂粒度、催化剂的酸含量、还原方法、氮化度及催化剂的存放时间等独立变数对 CH_4生成率的影响,指出应用浸渍法适当增加催化剂的碱含量并采用较高的反应压力(15气压左右)可以抑制 CH_4的生成率到已转化的 CO 的3%左右.以上措施对和缓 CH_4生成随时间增加的趋势也有良好的影响.综合实验结果,论证了 CH_4生成率与产品轻重间的依附关系,并对 CH_4生成的原因及其随合成时间而逐渐增加的现象作了初步理论上的探讨.

Two surface heat-treatment processes, liquid nitriding and sulfurizing, are used to compare with the current production process of liquid carburizing, with other variables remaining constant. Both the wear test in laboratory and the running test in production shows that nitrided rings and sulfurized rings have better wear resistance, shorter running-in period, longer life and much lower percentage of end breakages, than carburized rings. Sulfurizing treatment shows the best result.

兩种表面热处理液体滲氮及滲硫工艺与現行生产上原采用之液体渗炭淬火处理工艺,在尽量保持其他可变数不变的情狀下加以比較。在试样磨損試驗及钢領运轉試驗中,都曾显示滲炭后再滲入氮及硫较之滲炭淬火钢领有較好的耐磨性,較短的走熟期,較長的寿命及少得多的断头率。其中硫化处理显示最佳的效果。

This new type cold extrusion die steel contains a relatively low percentage of carbon and alloying elements and the nonuniformity of its carbide is improved, resulting in high strength combined with great impact toughness.This steel is easy to forge and heat-treat, and is normally quenched in a wide range of temperature. It may be subjected to gas-soft-nitriding due to its secondary hardness and better heat stability after tempering.Practice shows that this steel is quite suitable for making cold extrusion...

This new type cold extrusion die steel contains a relatively low percentage of carbon and alloying elements and the nonuniformity of its carbide is improved, resulting in high strength combined with great impact toughness.This steel is easy to forge and heat-treat, and is normally quenched in a wide range of temperature. It may be subjected to gas-soft-nitriding due to its secondary hardness and better heat stability after tempering.Practice shows that this steel is quite suitable for making cold extrusion punches. Breaking and cracking are in the main eliminated, thus stabilizing and considerably prolonging the punch life.It is worth while recommending this steel for manufacturing cold extrusion dies, because it not only reduces the production cost through saving alloying elements, but also prolongs the die life.

本文介绍了一种新型的冷挤压模县钢65Cr4W3Mo2VNb。这种钢的碳及合金元素含量较低,碱化物不均匀性得到改善,在获得高强度的同时并兼有高的冲击韧性。 这种钢的锻造和热处理工艺简便。淬火温度范围较宽,回火后具有二次硬度,并有较高的热稳定性,可以进行气体软氮化。 生产实践表明,这种钢用于制造冷挤凸模,基本上克服了高速钢凸模容易折断和碎裂的现象,使用寿命稳定,并有显著提高。 新钢种作为冷挤压模具用钢,既节约了合金元素,降低了成本,又提高了模具寿命,具有推广价值。

 
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