Practical Casting blast furnace hot metal composition of fast thermal analysis
Thermal analysis technique used to determine the chemical composition of molten iron and casting performance of the development in China started late, but after decades of continuous research of scientists in China and a lot of practical work, both in theory and practice of the breakthrough progress, has now entered the practical stage, and may gradually replace the import of similar products. The basic principle of thermal analysis is the solidification process of molten iron in the cooling curve of temperature phase transition occurs, with the crystallization heat release or absorption occurs in the cooling curve inflection point that is characteristic values, characteristic value of the hot metal chemistry the composition and performance. In the sample cup to join some of alloying elements can change the way the solidification of cast iron, cast iron used in different performance parameters to the test.
Second, equipment technical parameters
1, measuring principle: high-precision A / D and the microprocessor temperature curve acquisition, through hot metal crystallization method to measure and calculate the carbon hot metal silicon content and quality parameters
2, temperature range: 1200 ℃ ~ 1370 ℃
3, measuring range: carbon equivalent of 3.2 ~ 4.8 ± 0.047%; carbon content of 2.8 ~ 4.2 ± 0.039%; silicon content of 0.9 ~ 3.0 ± 0.1%
4, sample cup is equipped with dual wire dividing number: K-type Square Cup
5, measurement functions: thermal analysis of cast iron
6, analytical procedures: white population, the carbon content of gray cast iron, silicon content and carbon equivalent, eutectic degree, △ T, △ Tm determination, etc.
7, expanding the application: non-alloy cast iron of RM, HB, K, Z / H, MEG, etc. Determination
8, display: 4 LED digital display, character height 50mm
9, measurement time: up to 240 seconds
10, the working process of instruction: The potential-free reed relays and panel on "ready" "measurement" "end" to connect the three signal lights
3, apparatus, composition and shape
Apparatus by the host, analysis of the sample cup bearing, thermal analysis sample cup and other components.
4, measurement process
When the sample cup on the analysis of bearing on, the green light shows that the system is ready, the work can be measured. Pouring molten iron into the cup, the yellow light (green light off), start measuring the temperature cooling curve instrument, according to parameters set by the valuation instrument display different reference signal, thermal analysis is calculated in accordance with the procedures pre-CEL, C% , Si% equivalent. After testing and calculation, the red light (yellow light out). In the red light goes out, you can press the corresponding button to read the corresponding measured values.