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Method Selection

Two methods are described in this application note; either method can be used to analyze iron, steel, nickel-, and cobalt-base alloys. The Precision Method is recommended for general use and will provide the best precision and accuracy throughout the typical O, N, and H concentrations found in this group of metals; approximate cycle time is 3.5 minutes. The Fast Track method can be used where speed of analysis is a critical component; for example, when molten metal is being sampled and results are required in the shortest possible time. This method will produce suitable results for most samples; approximate cycle time is 2.25 minutes. As noted above, sampling and sample preparation are key elements to accurate O, N, and Hdetermination as well. It is up to the user to determine which method best meets their needs.

可选具有压力补偿和温度控制性能的标气检测气路。山东美国分析仪供应商

Procedure – Powder/Chip Samples

Determine the instrument blank.

Press the Analyze button on the instrument screen again, the loading head slide-block will close and the lower electrode will open.

Clean the upper and lower electrode either manually or remove the crucible and press the analyze button to clean with an automatic cleaner if applicable.

Add approximately 0.05 g of *** Graphite Powder to a 782-720 Graphite Crucible.

Firmly place the crucible on the lower electrode tip or appropriate autoloader position.

Procedure - Solid Samples

Press the Analyze button on the instrument screen again, the loading head slide-block will close and the lower electrode will open.

Clean the upper and lower electrode manually, or, if applicable, remove the crucible and press the analyze button to clean with the automatic cleaner

Add approximately 0.05 g of *** Graphite Powder to a *** Graphite Crucible.

Firmly place the crucible on the lower electrode tip or appropriate autoloader position.

Press the Analyze button on the instrument screen, the lower electrode will close and the analysis sequence will start and end automatically

Procedure - Solid Samples

Determine the instrument blank.

Repeat steps 2b through 2g a minimum of three times.

Set the blank following the procedure outlined in the operator's instruction manual.

Instrument calibration/drift correction.

Login a minimum of 3 Standard replicates.

Weigh approximately *** grams of a calibration/drift standard, enter the mass and standard identification into appropriate replicate fields.

Note: LECO Reference Materia***o not require preparation.See preparation statement on the reference material certificate.

20位或100位全自动分析系统。

Summary

The determination of the amount of oxygen, nitrogen, and hydrogen in iron, steel, nickel-, and cobalt-base alloys represents some of the most important quality metrics for these materials. Oxygen is used to create steel from pig iron by removing excess carbon. Oxygen content must be controlled to limit the amount of carbon monoxide that can be formed during solidification which may cause excessive porosity. Nitrogen is considered both an impurity as well as an important alloying agent. Itcan be present as a nitride or interstitially in its gaseous form. Increased nitrogen content is known to increase yield and tensile strength, thus decreasing ductility and formability. Excessive levels may evolve during solidification thus increasing porosity. High hydrogen content is the primary cause of embrittlement, blistering and flaking due to its high

mobility through the lattice and provides no potential alloying benefits. 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.

Cornerstone氧氮氢分析软件同时支持***的数据文档格式和可变的报告格式。新疆元素分析仪厂家供应

长寿命的红外发射光源和无漂移的电路设计保证红外检测池的长期稳定性。山东美国分析仪供应商

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

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