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 全自动分析系统、打印机、天平、远程诊断。广东美国LECO分析仪优惠价格
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
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.
Determine the instrument blank.
a. Login a minimum of 3 Blank replicates.
b. Press the Analyze button on the instrument screen. After a short delay, the loading head slide-block will open.
c. Press the Analyze button on the instrument screen again, the loading head slide-block will close and the lower electrode will open.
d. Clean the upper and lower electrode manually, or, if applicable, remove thecrucible and press the analyze button to clean with the automatic cleaner.
e. Firmly place a graphite crucible on the lower electrode tip.
f. Press the Analyze button on the instrument screen, the lower electrode will close and the analysis sequence will start and endautomatically.
g. Repeat steps 2b through 2f a minimum of three times.
h. Set the blank following the procedure outlined in the operator's instruction manual.
力可***仪器采用触摸屏技术和在线软件平台,增强了仪器的可操作性、降低了分析成本、节省实验室桌面空间。
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.
氧高低双量程采用3个碳红外检测一氧化碳和二氧化碳,保证准确定量。广东美国LECO分析仪优惠价格
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.
SamplePreparationSamplingandsamplepreparationofref
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