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.
仪器的亮点和优势：
特点和优势
·炉头区域LED照明系统
·炉头快速拆装的粉尘过滤装置
·装有自动旁路阀的可快速拆装氧水捕集装置
·**的动态流量补偿（DFC）保证热导池气体流量、压力恒定
高效脉冲炉冷却系统
·强力内循环水冷装置热交换效率
·双直流风扇保证持续冷却，不受电压波动的影响
·***电极炉头设计，提高脉冲炉
全自动分析系统（可选）
·自动清扫装置
·20位或100位全自动分析系统
·高效全自动真空除尘装置直接将粉尘排至仪器外部捕集器中，消除环境污染
改进的红外检测池技术
·***红外池的恒温绝热技术消除了外界环境温度的干扰
·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
·氧高低双量程采用3个碳红外检测器同时检测一氧化碳和二氧化碳，保证准确定量 山东进口分析仪咨询报价国际**的非色散红外及热导检测器 ，无移动部件，不需要手动调整。
Oxygen, Nitrogen, and Hydrogen in Refractory Metals
Summary
Titanium is a metal that can be combined with elements such as aluminum, vanadium, molybdenum, and tin to produce high-strength, lowdensity, and corrosion-resistant alloys. Titanium alloys are used by the military, medical devices, sporting goods, and aerospace industries because of these properties, and due to the strict demands of these industries, effort needs to be taken to assure that the material meets the highest of quality standards.
氧氮氢分析仪的常见故障及解决方法
供电正常、通讯正常，点击确认键后分析仪不工作。这是没有水流，炉子温度太高或仪器通道电压不正常。如没有水流，炉子温度太高这些信息会显示在显示器画面上，但没有信息显示说明这两项正常。接下来检查仪器通道零位电压，如果比±3V高出1V以上，可能是因为气瓶空了，或者是空气进入到分析仪中。检查并更换化学试剂，如果有空气进入热导池里，热导池的电压就会＜-6V，此时打开右面的门，堵住炉子气体进口，10s后，热导池电压值必然升高。经过逐一排查，**终确认碱石棉有问题，更换后仪器正常。 分析软件同时包括实时的环境参数的监测，提供完整的系统图表的模拟。
Procedure - Solid Samples
Prepare the instrument as outlined in the operator's instruction manual.
Determine the instrument blank.
Login a minimum of 3 Blank replicates.
Press the Analyze button on the instrument screen. After a short delay, the loading head slide-block will open. Place a 502-344 Nickel Basket into the loading head.
Note: samples using automation should be placed in the appropriate autoloader position before starting the
analysis sequence. Once the sequence has started, the automatic analysis will start and end automatically.
简化日常分析所需的炉头进样部分机械维护工作。湖南专业分析仪
Sample Preparation
Sampling and sample preparation is an important issue because traditional methods used to obtain samples for oxygen and nitrogen determination are different from those recommended for hydrogen, especially when sampling molten metal. The main difference in steel sampling procedures for oxygen/nitrogen and hydrogen is due to the mobilityof hydrogen. Special precautions must be used when sampling for hydrogen. From molten steel and iron, a sample must be quickly quenched in cold water and chilled in a refrigerant such as liquefied nitrogen or a mixture of acetone and solid carbon dioxide in order to reduce losses of hydrogen from diffusion. Losses of oxygen and nitrogen from diffusion are not a problem. A sample that is taken for hydrogen and
chilled in a refrigerant can also be used for oxygen and nitrogen determination. However, a sample that is typically taken for oxygen and/or nitrogen determination is not suitable for hydrogen determination due to hydrogen loss (diffusion). Surface contamination must be removed by filing or light grinding, using care not to overheat the sample.
湖南专业分析仪
