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A kind of detection method of paraffin wax content in cemented carbide powder

A technology of cemented carbide and paraffin, which is applied in the field of detection of paraffin content in cemented carbide powder, which can solve problems such as unsafety, expensive gas phase-mass spectrometer equipment, and long detection time

Active Publication Date: 2015-12-16
HUBEI GREEN TUNGSTEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are certain defects in the two known methods. The former takes a long time to detect and is not safe in a hydrogen atmosphere. The latter gas phase-mass spectrometer equipment is expensive and has relatively high reaction requirements.

Method used

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  • A kind of detection method of paraffin wax content in cemented carbide powder
  • A kind of detection method of paraffin wax content in cemented carbide powder
  • A kind of detection method of paraffin wax content in cemented carbide powder

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Embodiment 1

[0023] A kind of detection method of paraffin wax content in cemented carbide powder, comprises the following steps:

[0024] (1) Establish a working curve

[0025] Weigh 0.2500g of paraffin standard sample, add it into the special carbon tetrachloride for infrared photometric oil measuring instrument and slightly heat until completely dissolved (the carbon tetrachloride has a wave number of 2930cm -1 Absorbance value at 0.001~0.03), transferred into a 250mL volumetric flask, diluted to the mark with carbon tetrachloride, mixed at constant volume, and prepared into a paraffin standard solution with a paraffin concentration of 1000mg / L. Pipette 1.0mL, 2.0mL, 3.0mL and 4.0mL of paraffin standard solutions into a set of 100mL volumetric flasks respectively, and prepare a serial gradient dilution solution of paraffin standard solutions with different paraffin concentrations (paraffin concentrations are 4 gradients, respectively 10mg / L, 20mg / L, 30mg / L and 40mg / L). Transfer the s...

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Abstract

The invention provides a detection method for paraffin content in powder for cemented carbide. According to the method, paraffin in the powder for cemented carbide is extracted and separated by using an organic solvent, absorbance of the paraffin is determined on an infrared luminosity oil analyzer, and paraffin content is calculated in reference of a working curve. The detection method has the advantages of small consumption of time, convenience, safety, reliability of results, capacity of simultaneous detection of a plurality of samples, low cost and an added standard recovery rate of 98 to 103%.

Description

technical field [0001] The invention relates to a method for quickly detecting the paraffin content in cemented carbide powder, in particular to a detection method for the paraffin content in cemented carbide powder. Background technique [0002] In the preparation process of cemented carbide, paraffin wax is usually used as a low-temperature forming agent, and raw materials such as cobalt powder and tungsten carbide (called cemented carbide raw materials) for bonding cemented carbide are molded at low temperature, and then undergo debonding. Steps such as wax and high-temperature sintering, preparation of the final cemented carbide tool, etc., among which forming is an important link in the process of preparing cemented carbide. Specifically, paraffin wax is mixed with the cemented carbide raw material after wet ball milling and drying in the form of paraffin organic matter (gasoline, hexane, etc.), and then the powder wrapped with paraffin wax is bonded together and presse...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/359G01N21/3563
Inventor 刘琮郭苗苗余俊何显达杨露露
Owner HUBEI GREEN TUNGSTEN CO LTD