惰气熔融-红外法测定镍钛合金中的氧含量

针对镍钛(NiTi)合金中的氧含量进行研究,建立了惰气熔融-红外吸收法测定NiTi合金中氧含量的新方法。研究了不同助熔剂、称样量、分析功率、分析时间及比较器水平对测定结果的影响。确定采用镍做助熔剂,分析功率为4.0至5.5kW,分析时间为30s,比较水平为2的条件对NiTi合金中氧含量进行测定。惰气熔融-红外法测定NiTi合金氧含量相对标准偏差为1.8%,对标准样品的测定结果与标准值基本相符。方法操作简单,分析速度快,能满足生产要求,对工艺研究和产品质量控制具有积极意义。

Determination of Oxygen Content in Nickel-Titanium Alloy by Inert Gas Fusion-infrared Absorption Method

The determination of oxygen in Nickel-Titanium (NiTi ) alloy by inert gas fusion-infrared method is studied by using TC-600 oxygen/nitrogen determinator. The effect of flux, sample weight, minimum analysis time and comparator level on determination results is investigated. Oxygen in NiTi alloy is determined by using 1 g nickel as flux. The sample mass is selected as 0.0700 g, the analytical power 4.5 kW, the minimum analysis time 30 s and the comparator level 2. The relative standard deviations of oxygen is 1.8 %. The determination result is in consistence with the standard value of standard sample. The inert gas fusion-infrared method is simple, quick and accuracy. It has been applied to the pratucal analysys with satisfactory results. It is meaningful in technical study and quality control.