查询词典 chromium

Wear tests of 45 steel and high chromium cast iron were carry out by self-made simulating sand slurry wear test machine.

在自制的模拟疏浚工况的立式泥沙磨损试验机上，对 4 5钢和含碳量分别为 2 %和 3%的高铬铸铁进行了泥沙磨损试验。

The effect of RE and heat treatment on impact fatigue property of medium chromium cast semi steel was studied in this paper by means of impact fatigue testing machine.

研究了稀土元素及热处理对中铬半钢冲击疲劳性能的影响。

The invention provides a method and apparatus for monitoring subsurface chromium depletion from a steel member, such as a pyrolysis pipe.

本发明提供一种用于监测诸如高温裂解管道之类的钢构件的表面下铬贫化的方法和装置。

Their properties on corrosion and erosive wear under wet phosphoric acid condition were studied with high chromium steel.

并和高铬钢进行对比，研究了在模拟湿法磷酸生产工况介质下腐蚀及30°和60°两种不同冲蚀角度下冲蚀磨损性能。

Here the high chromium content allows the steel to be highly polished and prevents deterioration of the cavity from heat and corrosion.

在这里高的铬含量使钢可以被抛光很多，而不会因为高温和腐蚀而磨损模腔。

The phase diagram was plotted. The study will be used as a basis for the separation of K2Cr2O7 and CrO3 for cleaner production of chromium trioxide. 2. The crystallization thermodynamics of the system was studied.

对该体系的单组分的结晶热力学进行了初步的研究，测定了K2Cr2O7的从25 °C至90 °C的溶解度和超溶解度，研究了各种影响因素对结晶的影响。

These include mass ratio of metallic powder to chromium trioxide and technological parameters of paint throwing off , drying and sintering processes.

包括：金属粉与铬酐质量比、甩液、烘干和烧结工艺参数。

The present paper mainly focused on the phase equilibria and crystallization separation of the multi-component aqueous salt system for cleaner production of chromium trioxide in the electro-synthesis process. And these diagrams of the above system was studied for the first time.

本文研究了该产业链中电催化法生产铬酸酐清洁工艺中多元水盐体系相平衡，首次构筑了体系相图，建立了铬酸酐多元复杂体系的结晶分离方法，为电催化法生产铬酸酐工艺路线的设计及优化提供理论依据，论文的主要内容包括如下几个方面： 1。

A new technology for making chromium trioxide and potassium nitrate simultaneously by using nitric acid to decompose potassium dichromate has been analyzed according to phase diagrams of the K2Cr2O7-CrO3-KNO3-HNO3-H2O quaternary system at 0oC, 25oC and 45oC based on experimental results.

以实验测得的K2Cr2O7-CrO3-KNO3-HNO3-H2O四元体系相图为依据，对用硝酸酸化重铬酸钾联产铬酸酐和硝酸钾工艺过程进行分析，确定了铬和钾利用率最大时的操作条件。

Optimal pretreatment conditions of electroless nickel plating for magnesium were decided by many experiments. Phosphoric acid technology was used to instead of acid processing by chromium trioxide and ferric chloride, and excellent coating was obtained by using dipped zinc, cyanide copper, nickel as medium.

通过多次试验确定了镁及镁合金的前处理方案，以磷酸洗的方法代替传统的铬酐加三氯化铁酸洗浸蚀的前处理工艺，配置简单，操作方便，以浸锌层、氰化铜层和中性镍层作为化学镀中间层，得到了结合力良好的化学镀镍层，获得了镁合金表面处理的新突破。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了