碳化

Possible surface carburization may be detected optically in spheroidized materials by observation of surface pearlite or an increased number of carbide spheroids.

通过观察球光体表面或碳化物的增加的数目在球化处理材料方面，在视力上发现可能的表面渗碳。

The company is committed to new product development and new technology use, with impressive performance, product won the State Economic Commission for outstanding new products Jinlong, the Ministry of Science and Technology Achievement Award metallurgical, nonferrous metals Company scientific and technological progress third place with titanium diboride composite carbon block national patent, and the drafting of cold chopped carbon material Buban standards.

公司致力于新产品新技术的开发与利用，具有骄人的业绩，产品荣获国家经委优秀新产品金龙奖，冶金部科技成果奖，有色总公司科技进步三等奖，拥有硼化钛复合碳块国家专利，并起草了冷捣碳素料的部颁标准。

Three types of humic acids, i.e. peat, lignite and weathering coal (named as C-HA, H-HA and F-HA, respectively), were extracted and stability constants of Mn(superscript 2+) and Zn(superscript 2+) with the three humic acids were investigated.

以分别来源于草碳、褐煤和风化煤的腐殖酸为供试材料，采用离子交换平衡法研究了不同腐殖化程度的腐殖酸与Mn(上标 2+)和Zn(上标 2+)的络合稳定常数，并探讨了环境pH值对络合稳定常数的影响。

The activities are high in the topsoil and low in the subsoil, decrease from rhizoplane soil to root-free soil for all three enzymes.

从表层土向下，由根表土向外，碳矿化速率及其相关的各种酶活性均呈下降趋势。

Various kinds of steel such as structure steel, tool steel, pipe line steel, reinforcing steel bar, common engineering steel and cast iron may be improved in their properties by vanadium nitrides and carbides.

已有的研究表明碳氮化钒添加于钢中能提高钢的耐磨性、耐腐性、韧性、强度、延展性和硬度以及抗热疲劳性等综合机械性能，并使钢具有良好的可焊接性能，而且它能起到消除夹杂物等作用，在高强度低合金钢中的应用效果更加明显。

Catalysts with metal compound promotors are widely used in sulfur recovery units.

各种负载金属催化剂在硫磺装置上被广泛应用，这些催化剂在停工过程中需要进行还原、热浸泡、烧碳再生、惰性气体吹扫、钝化处理，这些处理过程都面临过氧导致催化剂床层飞温危险。

The results indicated that the adsorbance of adsorbed CO in the presence of alkali and rare-earth metal oxide decreased, and thus suppressed the nick loss in the form of Ni〓 in the POM process.

CO-FTIR的结果表明，锂和镧的添加可明显减少CO在NiO/γ-Al〓O〓上的吸附，从而抑制反应过程中羰基镍的生成和流失，同时也抑制了CO的歧化积碳和在表面进一步氧化成CO〓。3。

Improvements According to the causes of valve casting defect, we are mainly taken from the following improvements:(1) appropriately increasing the iron liquid carbon equivalent expansion of the use of graphite materials to enhance the ability of self-feeding.

改进措施根据阀门铸件缺陷的成因，我们主要从以下几个方面采取了改进措施：(1)适当提高铁液碳当量，利用石墨化膨胀增强材质的自补缩能力。

A thin film of titanium carbide is obtained by vacuum evaporating oftitanium. With diffusion treatment, the existance of titanium carbide is identified by X-raydiffraction analysis. Quantatitive analysis is made by XPS to invetigate diffusion ofcarbon atom between diamond and titanium film.

用真空蒸镀法在金刚石表面镀覆Ti层，并经扩散处理使金刚石表面形成TiC膜，实现了金刚石表面的金属化。X射线衍射分析证实了TiC的存在，利用XPS定量分析验证了在金刚石表面碳原子与钛镀层之间的反应扩散模型。

Using this reaction, a three-component reaction to synthesize tetrahydrofuran derivatives was studied.

另外我们还对炔烃碳钯化启动的烯炔偶联反应进行了初步的探索。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。