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氧氮氧分析軟件允許用戶在單一分析界面中完成日常的所有工作，快速而且簡單易用。浙江進(jìn)口分析儀廠家直銷

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.

氧氮?dú)浞治鰞x的原理：分析樣品在惰性氣流存在下于石墨坩堝中加熱熔融，其中脈沖爐溫度可自由設(shè)定，并通過一個(gè)非接觸式的光學(xué)溫度傳感器進(jìn)行實(shí)時(shí)監(jiān)控，用于實(shí)現(xiàn)樣品的完全分解，反應(yīng)所生成的CO H2和N2被帶入到具有高穩(wěn)定性和靈敏度的檢測系統(tǒng)進(jìn)行檢測。對于CO的檢測采用的是非色散性紅外檢測器，對于N2和H2的檢測則采用熱導(dǎo)檢測器。

氧氮?dú)浞治鰞x的特點(diǎn)：快速準(zhǔn)確分析，自動化操作；精密氣體校準(zhǔn)；CO紅外檢測器，高分辨率和重現(xiàn)性的N、H熱導(dǎo)池檢測器；同一臺儀器實(shí)現(xiàn)熔融提取和熱提??；熱提取分析時(shí)間可調(diào)；可自由選擇溫度*高達(dá)2500 °C；光學(xué)溫度計(jì)溫度測定和控制；所有檢測器自動調(diào)零/自動水平控制（ALC）；數(shù)據(jù)評估的自動優(yōu)化選擇范圍；爐自動清潔和坩堝自動進(jìn)樣（可選）；外設(shè)電腦進(jìn)行操作和控制；樣品信息保存； 所有樣品數(shù)據(jù)可追蹤查詢；通過FTP或本地局域網(wǎng)進(jìn)行數(shù)據(jù)傳輸； ON，H分析輕松切換。

氧氮?dú)浞治鰞x的使用注意事項(xiàng)：

1 、氧氮?dú)浞治鰞x在初次啟用前，應(yīng)該對連接點(diǎn)、焊點(diǎn)、閥門等進(jìn)行檢漏，以確?？諝庵械难醪粫礉B進(jìn)入管道及儀器內(nèi)部，造成測量數(shù)值偏高。

2、再次使用儀器前，要進(jìn)行管道系統(tǒng)凈化，將漏入的空氣除干凈，同時(shí)確保連接取樣管路時(shí)沒有漏入空氣。

3、樣氣中氧含量的變化會受管道材質(zhì)及表面粗糙度影響，因此一般連接管路選用銅管或拋光過的不銹鋼管，而不用塑料管、橡膠管等。

4、微量元素分析時(shí)，要避免各種管件、閥門、表頭等死角對樣氣造成污染，因此必須盡可能的簡化氣路系統(tǒng)，連接件死角要小，以防止溶解氧逸出造成污染，使用水封、油封及臘封等設(shè)備，才能較好的確保數(shù)據(jù)的。

通用下電極坩堝支座，容納各種坩堝使用。

美國力可LECO氧氮?dú)浞治鰞x

公司介紹：

美國力可公司(LECO)始于1936年 ，以生產(chǎn)用于冶金、機(jī)械、能源、化工、農(nóng)業(yè)、食品及科研開發(fā)領(lǐng)域的各種分析儀器。

ONH836氧氣/氮?dú)?氫氣元素分析儀設(shè)計(jì)用于使用惰性氣體熔融技術(shù)對無機(jī)材料，鐵和非鐵合金以及耐火材料中的氧，氮和氫含量進(jìn)行寬范圍的測量。

堅(jiān)固的樣品加載區(qū)域可簡化日常維護(hù)并大程度減少大氣污染

用于氧氣檢測的三重紅外電池可實(shí)現(xiàn)業(yè)內(nèi)大的檢測范圍

通過自動化選項(xiàng)提高實(shí)驗(yàn)室生產(chǎn)率

可用的自動清潔器大程度地減少了兩次分析之間的手動清潔需求

適用于坩堝和樣品的20位往復(fù)式裝載機(jī)

安裝在動臂上的觸摸屏界面可提供更好的人體工程學(xué)設(shè)計(jì)和直觀的操作

紅外（IR）和熱導(dǎo)率（TC）檢測器，沒有活動部件，也無需手動調(diào)節(jié)

改善TC電池的穩(wěn)定性

可繞過的OMI-2載氣洗滌塔，提高了TC電池的穩(wěn)定性

獲得Dyanamic流量補(bǔ)償可進(jìn)一步增強(qiáng)TC細(xì)胞的穩(wěn)定性

Cornerstone氧氮?dú)浞治鲕浖殖?個(gè)主要部分：分析、診斷、設(shè)定、儀器，界面可快速導(dǎo)航和組織。上海美國LECO氧氮?dú)浞治鰞x采購

可選六軸可旋轉(zhuǎn)觸摸屏幕，增強(qiáng)了操作的工效和直觀性。浙江進(jìn)口分析儀廠家直銷

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