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Sample Preparation

Sampling and sample preparation of refractory metals such as titanium and zirconium is somewhat different from that of steel. Unlike steel samples, hydrogen is not as mobile in this group of materials; therefore, storage in liquid nitrogen or dry ice is not required. However, it is important to keep the sample cool when cutting or sectioning. Sample preparation for oxygen and nitrogen determination has beendifferent from that of hydrogen determination.

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Oxygen, Nitrogen, and Hydrogen in Refractory Metals

Summary

One of the most critical chemical specifications of titanium alloys is the hydrogen content. Too high of a

hydrogen content can cause hydrides to precipitate, which can lead to embrittlement and subsequent

cracking when the alloy is stressed. Hydrogen pickup typically occurs during downstream processing steps

such as heat treating, pickling, and cleaning.

The LECO ONH836 is a simultaneous oxygen, nitrogen, and hydrogen determinator that utilizes an electrode furnace, inert carrier gas, and both infrared and thermal conductivity detection to meet the analytical needs of the refractory metal industry. 

This application note was written specifically for use with the LECO ONH836 series determinator.

力可ONH836氧氮氢分析仪

特征

稳固的炉头试样加载结构

试样加载过程中完全密闭，消除大气的中可能带来的杂质的污染；

简化日常分析所需的炉头进样部分机械维护工作。

可选的自动功能

上下电极自动清扫装置；

20位试样及坩埚自动进样装置。

附加功能及优点

可选六轴可旋转触摸屏幕，增强了操作的工效和直观性；

可选具有压力补偿和温度控制性能的标气检测气路；

新型气路管道减少气路连接阀，使得漏气，断路故障更少；

配置SmartLine Remote远程诊断功能。

美国力可LECO氧氮氢分析仪

公司介绍：

美国力可公司(LECO)始于1936年 ，以生产用于冶金、机械、能源、化工、农业、食品及科研开发领域的各种分析仪器。

ONH836氧气/氮气/氢气元素分析仪设计用于使用惰性气体熔融技术对无机材料，铁和非铁合金以及耐火材料中的氧，氮和氢含量进行宽范围的测量。

坚固的样品加载区域可简化日常维护并大程度减少大气污染

用于氧气检测的三重红外电池可实现业内大的检测范围

通过自动化选项提高实验室生产率

可用的自动清洁器大程度地减少了两次分析之间的手动清洁需求

适用于坩埚和样品的20位往复式装载机

安装在动臂上的触摸屏界面可提供更好的人体工程学设计和直观的操作

红外（IR）和热导率（TC）检测器，没有活动部件，也无需手动调节

改善TC电池的稳定性

可绕过的OMI-2载气洗涤塔，提高了TC电池的稳定性

获得Dyanamic流量补偿可进一步增强TC细胞的稳定性

稳固的炉头试样加载结构。

Sample Preparation

Typically, titanium and zirconium samples are chemically etched to remove surface contamination when oxygen and nitrogen are determined. However, etching can introduce hydrogen into the sample.

ASTM method E 1409 "Determination of Oxygen and Nitrogen in Titanium and Titanium Alloys by the Inert

Gas Fusion Technique", as updated in 1996, permits either etching or abrading (filing) of the test specimen.

ASTM E 1447 "Determination of Hydrogen in Titanium and Titanium Alloys by the Inert Gas Fusion Thermal

Conductivity/Infrared Detection Method" permits surface preparation by abrading (if necessary to remove

contamination). Differences in sample preparation present somewhat of a dilemma regarding simultaneous

determination of O, N, and H in titanium. However, abrading samples with a file to remove surface

contamination will yield accurate O, N, and H results. The ONH836 utilizes a high-power electrode furnace to quickly and efficiently release the target gases from within the sample, which allows for a very rapid simultaneous determination of oxygen, nitrogen, and hydrogen.

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ONH836氧氮氢分析仪

高频燃烧红外检测技分析无机材料中的碳、硫含量。

采用惰性气体保护熔融法，提供各种无机材料、钢铁、有色金属、硬质合金、难熔金属、陶瓷等材料中宽范围的氧氮氢同时分析。

该仪器配置MS Windows®的软件接口，专为触摸屏操作定制。长期的开发研究与客户反馈相结合，这个简单方便的软件使得用户可以快速完整访问仪器控制，分析设置，故障诊断，数据报告， **提高日常分析的效率并节省用户宝贵的时间。 可选的Cornerstone® Mobile软件功能，使得用户可以在手机，便携式电脑及台式电脑上便捷的访问仪器数据，分析曲线图形以及仪器的状态，实现对仪器的遥控。 新疆美国LECO分析仪厂家供应

上海禹重实业有限公司主要经营范围是仪器仪表，拥有一支专业技术团队和良好的市场口碑。公司自成立以来，以质量为发展，让匠心弥散在每个细节，公司旗下光谱仪，色谱仪，质谱仪，样品前处理深受客户的喜爱。公司秉持诚信为本的经营理念，在仪器仪表深耕多年，以技术为先导，以自主产品为重点，发挥人才优势，打造仪器仪表良好品牌。在社会各界的鼎力支持下，持续创新，不断铸造***服务体验，为客户成功提供坚实有力的支持。