氮气氛,nitrogen atmosphere
1)nitrogen atmosphere氮气氛
1.The Reflow Techniques with Nitrogen Atmosphere;采用氮气氛保护的再流焊接技术
2.Results indicate that coal pyrolysis in hydrogen atmosphere, companed with in nitrogen atmosphere, the coversion rate, the yield of gases and the quality of tars are enhanced.常压、温度为600~1200°C条件下,东胜烟煤分别在氢和氮气氛中热解的实验研究表明:煤在氢气氛中热解与在氮气氛相比产气率更高,焦油质量较好,同时获得了较高的煤转化率;热解温度强烈地影响热解产物的组成和煤转化率,随温度的升高煤转化率提高,热解气产率增加,CH4、CO和CO2的产率上升,焦油产率降低,但温度对C+2和H2O的产率影响不大。
3.Large diameter carbon tubes(LDCTs) with different morphologies were prepared by DC arc discharge under the conditions of mixed catalysts of iron,cobalt and nickel oxides,and nitrogen atmosphere of high temperature.在高温氮气氛以及铁、钴、镍的氧化物混合催化剂作用下,采用直流电弧放电法制备了具有不同形貌特征的外径超过100 nm的大直径碳管(LDCTs)。
英文短句/例句

1.An Investigation of TiN Coatings Prepared by Electrospark Deposition under Nitrogen Atmosphere;氮气氛下电火花沉积含TiN表面层的研究
2.Study on pyrolysis of cassava residues in N_2 atmosphere在氮气氛围下木薯渣热裂解的试验研究
3.Including cutting in special gas, nitrogen blown cutting, dry static cooling.在氮气氛围中进行干切削(氮加工)干式静电冷却技术。
4.Study on Mechano-Chemical Effect of Aluminum Oxide and Aluminum at the Nitrogen Atmosphere;氮气氛条件下氧化铝及铝的机械力化学效应研究
5.Preparation of Large Diameter Carbon Tubes by DC Arc Discharge Under Nitrogen Atmosphere of High Temperature采用高温氮气氛直流电弧放电法制备大直径碳管
6.Kinetics of Thermal Decomposition of Magnesite in Nitrogen菱镁矿在氮气气氛中的热分解动力学
7.Study on Ignition Proof Magnesium Alloys and Its Ignition Proof Principles under Nitrogen Atmosphere;氮气气氛下阻燃镁合金及其阻燃机理研究
8.This paper deals with the conception concerning the nitrogen supplying capacity of ammonia atmosphere.本文提出了关于氨气氛供氮能力的概念。
9.Influence of Reaction Gases on Nitrogen in Coal and Char Release;反应气氛对煤及其半焦中含氮物释放的影响
10.Research on Thermo-plasticity Precision Forming Without or Little Oxidation System in Nitrogen-based Atmosphere;热塑性精成形氮基气氛少无氧化系统的研究
11.Crystallization of Amorphous SiCN Ceramic Annealed in Vacuum真空气氛下非晶硅碳氮(SiCN)陶瓷的高温晶化行为
12.Effect of Forming Gas on Properties of SrBi_2Ta_2O_9 Ferroelectric Thin Film and Powder氮氢混合气氛对SrBi_2Ta_2O_9铁电薄膜和粉末性能的影响
13.Releasing Characteristics of the Fuel Nitrogen from the Pulverized Coal Combusting Under Different Atmosphere反应气氛对燃料氮析出规律的影响研究
14.The Study on Transfer Behaviors of Sulfur and Nitrogen of Coal in Heat Field in O_2/CO_2 Atmosphere;O_2/CO_2气氛下燃煤中硫与氮在热场中转化行为的研究
15.Smelting of high nitrogen martensitic stainless steels by vacuum induction furnace under near normal protective atmosphere真空感应炉近常压气氛保护熔炼高氮马氏体不锈钢
16.Morphological Analysis of Low-temperature Nitrogen Adsorption Isothermal Curves of Coal Coke Undergoing a Quick Temperature Rise in an O_2/CO_2 AtmosphereO_2/CO_2气氛快速升温煤焦低温氮吸附等温线形态分析
17.a convivial evening, atmosphere欢乐的夜晚、 气氛.
18.A splendid atmosphere or aura, as of glamour, that surrounds a person or thing.气氛,光彩围绕人或东西的气氛或氛围,如魅力
相关短句/例句

nitrogen atmosphere氮气气氛
1.By using MMS-1G pin-on-disk high temperature and high speed friction and wear tester,the tribological properties of CrNiMo steel-H96 copper couples in nitrogen atmosphere were investigated.利用MMS-1G型销-盘式高温高速摩擦磨损试验机研究了氮气气氛条件下CrN iMo钢/H96黄铜配副的摩擦磨损特性,利用扫描电子显微镜观察磨损表面形貌,采用能谱仪分析磨损表面及其磨屑的主要元素成分,并分析其磨损机理。
2.Nine groups of samples,prepared from carbon black and industrial Si at different ratios,were fired in nitrogen atmosphere at five temperatures of 1 350 ℃,1 400 ℃,1 450 ℃,1 500 ℃ and 1 550 ℃,respectively.以9组不同配料比的炭黑和单质硅为原料压制成试样,在氮气气氛下,分别于1 350,1 400,1 450,1 500,1 550℃下烧结,获得5个不同温度点合成样品;采用XRD分析技术研究试样的物相演变过程,研究C-Si系原料在氮气气氛合成过程中的物相变化和反应动力学机制。
3)nitrogen-based atmosphere氮基气氛
1.Taking the automotive rear axle gear as an example,the design and adjusting of nitrogen-based atmosphere carburizing process were conducted on the new-built mult-purpose chamber furnace.以汽车后桥齿轮为实例,在新制造的箱式多用炉上进行了氮基气氛渗碳淬火工艺的设计、调试和检测。
2.In this paper carburizing process design and adjusting of nitrogen-based atmosphere were analyzed,discussed and tested on the new made continuous carburizing furnace.本文对新制造的连续式渗碳炉氮基气氛渗碳工艺的设计与调试进行了分析、讨论和试验,结果表明,采用N2+甲醇制备的氮基气氛与丙烷气作为渗碳富化气进行渗碳,其工艺的设计与调试满足了加工产品的技术要求,因此是合理的,并作为一种安全、可靠和节能的热处理工艺值得推广。
4)nitrogen based atmosphere氮基气氛
1.If nitrogen based atmosphere of NH 3,N 2 and CO 2 are adopted ,the process is worthy of spreading for its characteristics such as high permeation speed , carbonitriding layer, flat hardness gradient ,thi.采用NH3、N2和CO2的氮基气氛,具有渗速快、渗层厚、硬度梯度平缓等特点,且污染少、价格低,值得推广。
2.The application and constitution of nitrogen based atmosphere nitrocarburizing production line are intorduced.介绍了氮基气氛在气体软氮化生产线上的应用和生产线的组成及作用。
5)nitriding atmosphere渗氮气氛
1.This paper found the calculate method of the critical nitrogen potential profile ,and analyses the effects of temperature、 time 、the content of alloy elements and nitriding atmosphere on the critical nitrogen potential profile.本文在建立临界氮势曲线计算方法及结果基础上,分析温度、时间、合金元素含量、渗氮气氛对临界氮势曲线的影响,得出结论:调整渗氮温度、渗氮气氛和氨流量,通过气氛氮势的变化,可有效地控制化合物层的形成。
6)nitrided atmosphere氮化气氛
1.The structure and property of 40Cr steel ion?nitrided layer in the different nitrided atmosphere were investigated by means of Ion Microprobe,XRD,Microscope Analysis and so on.结果表明 ,在氨气加钛气氛下进行离子氮化 ,有利于γ′相的形成 ,氮化层硬度高 ,氮化层深 ,这是氮化气氛中活性钛作用的结果 。
延伸阅读

粉末烧结气氛粉末烧结气氛powder sintering atmosphere tenmo shaoJ一eq一fen粉末烧结气氛(powde:Sintering atmo-sphere)粉末烧结时,烧结炉内的实际气氛。烧结气氛分为保护气氛、可控气氛和空气。 保护气氛用于保护烧结制品不受氧化的气氛。保护气氛分为还原性气氛和中性气氛。 还原性气氛有氢气、分解氨。(1)氢气。氢气在一定温度下具有很强的渗透性,是一种化学活性和对氧的亲和力均很强的可燃性无毒气体。氢在粉末冶金中,一方面可用作多种金属氧化物的还原剂,另一方面可用作多种粉末冶金材料和制品烧结和热处理的保护气氛。例如,钨、铝等难熔金属及硬质合金等的烧结,一般都用氢作保护气氛。尽管世界上90%以上的氢气是用夭然气和石油转化制取的,但水电解制氢技术可靠,操作维护简便。因此,粉末冶金中使用的氢气一般都是用水电解法制取的,其缺点是耗电多,成本较高。水电解制氢时,在阴极上析出氢,在阳极上析出氧。已商品化的水电解槽采用25%~30%KOH作电解液,氢气纯度高于99.7%,氧气纯度高于99.5%。(2)分解氨。分解氨是液氨经热分解所得的由氢和氮组成的混合气体,在粉末冶金中可用来作为还原剂,除某些含有与氮发生反应的成分的材料外,对其他材料的烧结也可用作保护气氛。氨在平常情况下是有刺激性臭味的无色气体。氨很容易液化,在常温加压时就可液化成液氨,液氨经气化后,在一定温度和催化剂的作用下分解而成氢与氮的混合气体,其反应式为:ZNH。一3H:+NZ。氨分解气氛的成分理论上是75环H:和25%N:。 中性气氛粉末冶金中使用的中性气氛有氮气、氨气、氦气以及真空等。可控气氛可以控制碳势或露点的气氛。可控气氛分为放热型气氛和吸热型气氛。 放热型气氛一种不需从外部供热的,由碳氢化合物气转化成的裂化气。其主要成分由co、cOZ、HZ、NZ、CH4等组成,它是一种可控气氛,但碳势较低,C02含量较高,而具有脱碳作用。根据空气与原料气不同的混合比,又有淡型和浓型气氛之分,淡型放热气氛中CO::CO=7一8.5;浓型放热气氛中CO::CO=0. 476一0. 716。淡型放热气氛的碳势很低,只能用作低碳钢、铜制品的无氧化加热气氛,而浓型放热气氛的碳势比较高一些,用作可控气氛时可以防止粉末冶金铁基、铜基零件的氧化和减少铁基零件的脱碳。放热型气氛的成分举例如下:一种原料气为甲烷的淡型放热气氛,含:10.5线COZ,1.5纬CO,1.2%HZ,余量NZ;一种原料气为甲烷的浓型放热气氛,含:5%COZ,10.5%CO,12·5%H:,0.5%CH‘,余量NZ。如果用净化方法除去其中的CO:和HZO,便可制成含CO和H:的氮基净化放热型气氛,这种净化气氛在粉末冶金中的应用可进一步扩大。