查询词典 chromium steel

The technology for the hard chromium electroplating of high tungsten stainless steel was investigated.

为了在高钨不锈钢基体上获得符合技术要求的电镀硬铬层，研制了一种特殊的镀铬新工艺。

Aiming at the tristep method smelting process of "electrical arc furnace+multifunction converter+VOD" for stainless steel, and centering about the dephosphorization during the process, the theoretical analysis and calculations have been carried out for the feasibility of several important links in the process chain (including desiliconization and chromium conservation in EAF, and simultaneous dephosphorization and desulfurization in ladle ) in the view of melting thermodynamics.

针对&电弧炉+多功能转炉+VOD&三步法不锈钢冶炼工艺，以脱磷为主线，从冶金热力学的角度对流程中涉及的几个重要工艺环节的可行性(包括电弧炉去硅保铬、铁水包同时脱磷脱硫等问题)进行了理论分析和计算。

The effects of extraction time and extracting agent on the determination of hexavalent chromium content in coatings on steel sheets were studied.

钢板在电子行业中广泛应用，传统的电镀和其他表面处理工艺，尤其是铬酸盐钝化，对环境产生巨大影响。

EC 9. Hexavalent chromium as an anti-corrosion of the carbon steel cooling system in absorption refrigerators.

在吸收式电冰箱中作为碳钢冷却系统防腐剂的六价铬。

A chromium free conversion coating at least equivalent in corrosion protective quality to conventional chromate conversion coatings can be formed on metals, particularly cold rolled steel, by a dry-in-place aqueous acidic liquid comprising: a component of anions, each of said anions consisting of at least four fluorine atoms and at least one atom of an element selected from the group consisting of titanium, zirconium, hafnium, silicon, and boron, and, optionally, ionizable hydrogen atoms, and optionally, one or more oxygen atoms; a component of cations of elements selected from the group consisting of cobalt, magnesium, manganese, zinc, nickel, tin, zirconium, iron, and copper; the ratio of the total number of cations of this component to the total number of anions of component being at least 1:5; sufficient free acid to give the composition a pH in the range from 0.5 to 5.0; a component selected from the group consisting of phosphorus-containing inorganic oxyanions and phosphonate anions; and a component selected from the group consisting of water-soluble and water-dispersible organic polymers and polymer-forming resins and, preferably, also including a component selected from the group consisting of tungstate, molybdate, silicotungstate, and silicomolybdate anions.

通过对包含以下成分的含水酸性液体进行干燥，可以在金属上形成无铬的转换涂层，该涂层与普通铬酸盐转换涂层相比，至少在抗腐蚀质量上等效：$_一种阴离子成分，所述各个阴离子包括至少4个氟原子，至少选自钛、锆、铪、硅与硼元素中的1个原子。任选地可离解的氢原子，任选地1个或多个氧原子；$_一种选自钴、镁、锰、锌、镍、锡、锆、铁与铜元素的阳离子成分，上述成分的阳离子总数与成分内的阴离子总数之比至少为1∶5；$_足够的游离酸以使该组合物的pH值在0.5～5.0的范围内；$_一种选自含磷的无机含氧阴离子与膦酸盐阴离子的成分；$一种选自水溶性与水可分散性有机聚合物与聚合物形成的树脂的成分，优选还包括一种选自钨酸盐、钼酸盐、钨硅酸盐与钼硅酸盐阴离子的成分。

It is shown that the amount of chromium carbide precipitated at the grain boundaries increases nearly logarithmically with time of sensitization, and the precipitation of 1—2% of carbon contained in the steel at the grain boundaries is sufficient to cause severe intergranular corrosion.

此外，18鉻-8镍型不锈钢中所含碳的总量中只要有1—2％析出在晶界，就足以引起严重的晶间腐蚀。

The studies of hydrogen behaviour in HR-1 stainless steel and its composite sample with CVD coated chromium oxidic film have been presented.

本文介绍氢在HR－1不锈钢基体及镀有氧化铬膜的复合材料中的行为研究，包括基体的准备；膜的制备；用不同手段从不同角度对膜进行的分析测试；膜与基体之间的平均结合力测定；用不锈钢材料构成的高温低压渗透回路的建造、调试、密封性能校准；纯HR－1基体材料中的氢渗透规律研究；有膜复合材料中氢的稳态迁移过程的表现规律实验结果。

HR-1 stainless steel Chromium oxidic film Hydrogen permeation

HR－1不锈钢；氧化铬膜；氢渗透

Chromium debases the corrosion rate of steel in seawater at initial stage.

含铬低合金钢在海水中短期浸泡的耐蚀性比碳钢好，长期浸泡的耐蚀性比碳钢差。

The wear surface morphologies showed that the mechanism of the 45 steel was micro-cutting and plastic deformations, and the mechanism of high chromium cast iron was micro-cutting of matrix structure and desquamating of carbide particles under the sand slurry wear condition.

对于象45钢这类较软的材料，在泥沙磨损条件下，材料的磨损机理主要是显微切削和多次塑性变形。对于含有较多高硬度碳化物质点的高铬铸铁类材料，在泥沙磨损条件下，材料的磨损机理主要是基体组织的显微切削和碳化物颗粒的脱落。

He and Nina moved to California and lived at 2005 Ivar Street, Apt.

他和Nina搬到加州，并在2005年伊瓦尔街，公寓生活。

Droperidol （ potently inhibits transfected HERGchannels and this is the probable mechanism for QT prolongation.

氟哌利多有效地抑制了转染的 HERG 钾通道，可能是 QT 间期延长的机制。