Instrument Introduction

If the hydrogen content in molten aluminum can be controlled, the quality of aluminum alloy castings will be substantially improved. Aluminum alloy absorbs hydrogen gas in liquid state, and if it is not removed, pores will form in the casting. Therefore, it is very important to accurately measure the hydrogen content in the molten aluminum before pouring, so as to ensure that the hydrogen content of the aluminum liquid is controlled within the allowable range after degassing and refining.

At present, there are two types of hydrogen measurement methods for molten aluminum that have been applied on site: qualitative observation and quantitative measurement. The qualitative observation method mainly involves reducing the pressure and solidifying the molten aluminum sample, observing the generation of bubbles and comparing them with known samples, or checking for cauliflower like appearance and bubbles on the metal surface, or measuring the specific gravity of the solidified metal. Such techniques generally can only provide qualitative information on hydrogen content, and human factors and metal purity have a significant impact, making them suitable for situations with lower requirements.

*The bubble method involves the operator recording the pressure and temperature at which * bubbles appear in the molten aluminum liquid, and referring to an empirical data comparison table to determine the hydrogen content. The advantage is that it is simple and intuitive, but due to visual observation and subjective factors, it cannot be used as an accurate quantitative instrument.

The graphite probe method is to directly insert the probe into the aluminum liquid and measure the hydrogen gas diffused into the vacuum systemSIEVERThe advantage of using laws to calculate hydrogen content is that the measurement results are relatively tedious, but the disadvantage is that the probe needs to be replaced frequently, the operating cost is high, and the instrument is inconvenient to move between different crucibles, and the measurement time is long.

by comparison,HYSCANThe application of quantitative pressure reduction directly measures hydrogen content, and the principle relies on mature technology. The measurement time and accuracy are the highest among similar products. The instrument has low operating costs, is sturdy and durable, and can be easily verified on site. It is an ideal choice for industrial and laboratory applications.

Basic principles

Extract a quantitative molten aluminum sample, use rapid depressurization technology to release all hydrogen gas from the aluminum liquid during controlled solidification process, and measure the hydrogen content through a precisely calibrated Pirani vacuum gauge.

Instrument application

Used for quality control and material research in the aluminum and aluminum alloy casting and processing industries, it is an ideal means of evaluating degassing effects, molten aluminum liquid quality, and melting treatment processes. Suitable for laboratory material research, especially for pre furnace casting or aluminum processing sites with multiple insulation furnaces, such as aluminum casting, aluminum foil, and aluminum profile processing.

HYSCAN IIThe hydrogen analyzer for molten aluminum is manufactured by the British company Mette and can quickly and accurately measure in the on-site environment of the casting workshop. The instrument is sturdy, easy to move, easy to operate, and safe to use. Being able to5Complete hydrogen content analysis of molten aluminum liquid within minutes, with high sensitivity0.01cm/100g.

HYSCAN IIThe hydrogen analyzer in molten aluminum can not only be used for quality control in production, but also for material science and process research, as well as evaluation and identification of melting treatment.

HYSCAN IIThe use of hydrogen gas analyzers in molten aluminum has reduced the product scrap rate, thereby reducing the consumption of energy, materials, equipment, and human resources, resulting in significant economic benefits. Normally, the saved funds can compensate for the investment in purchasing instruments within one to two years.

HYSCAN IIThe hydrogen analyzer for molten aluminum has been developed worldwide50Widely used in multiple countries, it has been used by several large enterprises such as FAW and FAW Group, as well as multiple universities and research institutions in China.

Instrument characteristics

Ø High analysis accuracy

Ø Fast analysis speed

Ø Low operating costs

Ø Easy to operate and safe

Ø The instrument is sturdy and durable

Ø Suitable for furnace front environment

Instrument technical parameters

Technical parameters of aluminum liquid hydrogen analyzer

Instrument system description:

HSYCAN IIThe layout of the vacuum system is shown in the "schematic diagram". It includes: vacuum pump, drying tank (used to remove residual moisture in the vacuum system), solenoid valves (V1, V2, V3), sample tank, and Pirani vacuum gauge.

HYSCAN IIThe body structure is a rigid skeleton used to fix the vacuum system, with 4 load-bearing casters installed underneath for easy movement.

HYSCAN IIThe sample pool is located above the instrument, next to the control panel, sealed by a metal cover plate and an 'O' - shaped rubber ring. The sample pool has a heating and constant temperature device to prevent the aluminum liquid sample from rapidly cooling.

HYSCAN IIThere are 3 control keys and 2 working point test keys on the panel. The operation of the vacuum pump and the opening of various solenoid valves are controlled by the program to stop. The LCD on the panel displays the test results.

HYSCAN IIThere is a printer installation position and data output interface under the body of the instrument. The power cord of the instrument is 5 meters long and protected by an armored corrugated tube. It can be stored in the steel frame on the back of the machine when not in use.